Commit Graph

6868 Commits

Author SHA1 Message Date
Robert P. J. Day
30aa96cdf8 Use hyphenated "remote-tracking branch" (docs and comments)
Use the obvious consensus of hyphenated "remote-tracking branch", and
fix an obvious typo, all in documentation and comments.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-13 09:57:09 -07:00
Masaya Suzuki
d067d98887 builtin/send-pack: populate the default configs
builtin/send-pack didn't call git_default_config, and because of this
git push --signed didn't respect the username and email in gitconfig in
the HTTP transport.

Signed-off-by: Masaya Suzuki <masayasuzuki@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-12 10:53:10 -07:00
Junio C Hamano
3737746120 index-pack: correct install_packed_git() args
The function does not start taking the repository object as a
parameter before v2.18 track.  Make the topic mergeable to v2.17
maintenance track by dropping it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 15:09:18 -07:00
Ævar Arnfjörð Bjarmason
dc06422183 refspec: s/refspec_item_init/&_or_die/g
Rename the refspec_item_init() function introduced in
6d4c057859 ("refspec: introduce struct refspec", 2018-05-16) to
refspec_item_init_or_die().

This follows the convention of other *_or_die() functions, and is done
in preparation for making it a wrapper for a non-fatal variant.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 10:11:29 -07:00
Ævar Arnfjörð Bjarmason
8d7b558bae checkout & worktree: introduce checkout.defaultRemote
Introduce a checkout.defaultRemote setting which can be used to
designate a remote to prefer (via checkout.defaultRemote=origin) when
running e.g. "git checkout master" to mean origin/master, even though
there's other remotes that have the "master" branch.

I want this because it's very handy to use this workflow to checkout a
repository and create a topic branch, then get back to a "master" as
retrieved from upstream:

    (
        cd /tmp &&
        rm -rf tbdiff &&
        git clone git@github.com:trast/tbdiff.git &&
        cd tbdiff &&
        git branch -m topic &&
        git checkout master
    )

That will output:

    Branch 'master' set up to track remote branch 'master' from 'origin'.
    Switched to a new branch 'master'

But as soon as a new remote is added (e.g. just to inspect something
from someone else) the DWIMery goes away:

    (
        cd /tmp &&
        rm -rf tbdiff &&
        git clone git@github.com:trast/tbdiff.git &&
        cd tbdiff &&
        git branch -m topic &&
        git remote add avar git@github.com:avar/tbdiff.git &&
        git fetch avar &&
        git checkout master
    )

Will output (without the advice output added earlier in this series):

    error: pathspec 'master' did not match any file(s) known to git.

The new checkout.defaultRemote config allows me to say that whenever
that ambiguity comes up I'd like to prefer "origin", and it'll still
work as though the only remote I had was "origin".

Also adjust the advice.checkoutAmbiguousRemoteBranchName message to
mention this new config setting to the user, the full output on my
git.git is now (the last paragraph is new):

    $ ./git --exec-path=$PWD checkout master
    error: pathspec 'master' did not match any file(s) known to git.
    hint: 'master' matched more than one remote tracking branch.
    hint: We found 26 remotes with a reference that matched. So we fell back
    hint: on trying to resolve the argument as a path, but failed there too!
    hint:
    hint: If you meant to check out a remote tracking branch on, e.g. 'origin',
    hint: you can do so by fully qualifying the name with the --track option:
    hint:
    hint:     git checkout --track origin/<name>
    hint:
    hint: If you'd like to always have checkouts of an ambiguous <name> prefer
    hint: one remote, e.g. the 'origin' remote, consider setting
    hint: checkout.defaultRemote=origin in your config.

I considered splitting this into checkout.defaultRemote and
worktree.defaultRemote, but it's probably less confusing to break our
own rules that anything shared between config should live in core.*
than have two config settings, and I couldn't come up with a short
name under core.* that made sense (core.defaultRemoteForCheckout?).

See also 70c9ac2f19 ("DWIM "git checkout frotz" to "git checkout -b
frotz origin/frotz"", 2009-10-18) which introduced this DWIM feature
to begin with, and 4e85333197 ("worktree: make add <path> <branch>
dwim", 2017-11-26) which added it to git-worktree.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 09:41:02 -07:00
Ævar Arnfjörð Bjarmason
ad8d5104b4 checkout: add advice for ambiguous "checkout <branch>"
As the "checkout" documentation describes:

    If <branch> is not found but there does exist a tracking branch in
    exactly one remote (call it <remote>) with a matching name, treat
    as equivalent to [...] <remote>/<branch.

This is a really useful feature. The problem is that when you add
another remote (e.g. a fork), git won't find a unique branch name
anymore, and will instead print this unhelpful message:

    $ git checkout master
    error: pathspec 'master' did not match any file(s) known to git

Now it will, on my git.git checkout, print:

    $ ./git --exec-path=$PWD checkout master
    error: pathspec 'master' did not match any file(s) known to git.
    hint: 'master' matched more than one remote tracking branch.
    hint: We found 26 remotes with a reference that matched. So we fell back
    hint: on trying to resolve the argument as a path, but failed there too!
    hint:
    hint: If you meant to check out a remote tracking branch on, e.g. 'origin',
    hint: you can do so by fully qualifying the name with the --track option:
    hint:
    hint:     git checkout --track origin/<name>

Note that the "error: pathspec[...]" message is still printed. This is
because whatever else checkout may have tried earlier, its final
fallback is to try to resolve the argument as a path. E.g. in this
case:

    $ ./git --exec-path=$PWD checkout master pu
    error: pathspec 'master' did not match any file(s) known to git.
    error: pathspec 'pu' did not match any file(s) known to git.

There we don't print the "hint:" implicitly due to earlier logic
around the DWIM fallback. That fallback is only used if it looks like
we have one argument that might be a branch.

I can't think of an intrinsic reason for why we couldn't in some
future change skip printing the "error: pathspec[...]" error. However,
to do so we'd need to pass something down to checkout_paths() to make
it suppress printing an error on its own, and for us to be confident
that we're not silencing cases where those errors are meaningful.

I don't think that's worth it since determining whether that's the
case could easily change due to future changes in the checkout logic.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 09:41:01 -07:00
Ævar Arnfjörð Bjarmason
1c550553c5 builtin/checkout.c: use "ret" variable for return
There is no point in doing this right now, but in later change the
"ret" variable will be inspected. This change makes that meaningful
change smaller.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 09:41:01 -07:00
Ævar Arnfjörð Bjarmason
3c87aa946a checkout: pass the "num_matches" up to callers
Pass the previously added "num_matches" struct value up to the callers
of unique_tracking_name(). This will allow callers to optionally print
better error messages in a later change.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 09:41:01 -07:00
SZEDER Gábor
aee9be2ebe update-ref --stdin: use skip_prefix()
Use skip_prefix() instead of starts_with() and strcmp() when parsing
'git update-ref's stdin to avoid a couple of magic numbers.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-04 12:26:01 +09:00
Junio C Hamano
ba928e9740 Merge branch 'rd/init-typo'
Message fix.

* rd/init-typo:
  init: fix grammar in "templates not found" msg
2018-06-01 15:06:40 +09:00
Junio C Hamano
7cb4a974d3 Merge branch 'en/rev-parse-invalid-range'
"git rev-parse Y..." etc. misbehaved when given endpoints were
not committishes.

* en/rev-parse-invalid-range:
  rev-parse: check lookup'ed commit references for NULL
2018-06-01 15:06:39 +09:00
Junio C Hamano
e1149fd7d9 Merge branch 'nd/use-opt-int-set-f'
Code simplification.

* nd/use-opt-int-set-f:
  Use OPT_SET_INT_F() for cmdline option specification
2018-06-01 15:06:38 +09:00
Junio C Hamano
2289880f78 Merge branch 'nd/command-list'
The list of commands with their various attributes were spread
across a few places in the build procedure, but it now is getting a
bit more consolidated to allow more automation.

* nd/command-list:
  completion: allow to customize the completable command list
  completion: add and use --list-cmds=alias
  completion: add and use --list-cmds=nohelpers
  Move declaration for alias.c to alias.h
  completion: reduce completable command list
  completion: let git provide the completable command list
  command-list.txt: documentation and guide line
  help: use command-list.txt for the source of guides
  help: add "-a --verbose" to list all commands with synopsis
  git: support --list-cmds=list-<category>
  completion: implement and use --list-cmds=main,others
  git --list-cmds: collect command list in a string_list
  git.c: convert --list-* to --list-cmds=*
  Remove common-cmds.h
  help: use command-list.h for common command list
  generate-cmds.sh: export all commands to command-list.h
  generate-cmds.sh: factor out synopsis extract code
2018-06-01 15:06:37 +09:00
Stefan Beller
e6be8e2f9f submodule--helper: plug mem leak in print_default_remote
Signed-off-by: Stefan Beller <sbeller@google.com>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
[jc: no need for remote to be const char *]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-01 14:52:47 +09:00
Jeff King
368b4e5906 index-pack: handle --strict checks of non-repo packs
Commit 73c3f0f704 (index-pack: check .gitmodules files with
--strict, 2018-05-04) added a call to add_packed_git(), with
the intent that the newly-indexed objects would be available
to the process when we run fsck_finish().  But that's not
what add_packed_git() does. It only allocates the struct,
and you must install_packed_git() on the result. So that
call was effectively doing nothing (except leaking a
struct).

But wait, we passed all of the tests! Does that mean we
don't need the call at all?

For normal cases, no. When we run "index-pack --stdin"
inside a repository, we write the new pack into the object
directory. If fsck_finish() needs to access one of the new
objects, then our initial lookup will fail to find it, but
we'll follow up by running reprepare_packed_git() and
looking again. That logic was meant to handle somebody else
repacking simultaneously, but it ends up working for us
here.

But there is a case that does need this, that we were not
testing. You can run "git index-pack foo.pack" on any file,
even when it is not inside the object directory. Or you may
not even be in a repository at all! This case fails without
doing the proper install_packed_git() call.

We can make this work by adding the install call.

Note that we should be prepared to handle add_packed_git()
failing. We can just silently ignore this case, though. If
fsck_finish() later needs the objects and they're not
available, it will complain itself. And if it doesn't
(because we were able to resolve the whole fsck in the first
pass), then it actually isn't an interesting error at all.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-01 11:48:56 +09:00
Junio C Hamano
e47dbece39 Merge branch 'ma/unpack-trees-free-msgs'
Leak plugging.

* ma/unpack-trees-free-msgs:
  unpack_trees_options: free messages when done
  argv-array: return the pushed string from argv_push*()
  merge-recursive: provide pair of `unpack_trees_{start,finish}()`
  merge: setup `opts` later in `checkout_fast_forward()`
2018-05-30 21:51:29 +09:00
Junio C Hamano
b2fd659294 Merge branch 'jk/config-blob-sans-repo'
Error codepath fix.

* jk/config-blob-sans-repo:
  config: die when --blob is used outside a repository
2018-05-30 21:51:27 +09:00
Junio C Hamano
e12cbeaa62 Merge branch 'bw/ref-prefix-for-configured-refspec'
"git fetch $there $refspec" that talks over protocol v2 can take
advantage of server-side ref filtering; the code has been extended
so that this mechanism triggers also when fetching with configured
refspec.

* bw/ref-prefix-for-configured-refspec: (38 commits)
  fetch: generate ref-prefixes when using a configured refspec
  refspec: consolidate ref-prefix generation logic
  submodule: convert push_unpushed_submodules to take a struct refspec
  remote: convert check_push_refs to take a struct refspec
  remote: convert match_push_refs to take a struct refspec
  http-push: store refspecs in a struct refspec
  transport: remove transport_verify_remote_names
  send-pack: store refspecs in a struct refspec
  transport: convert transport_push to take a struct refspec
  push: convert to use struct refspec
  push: check for errors earlier
  remote: convert match_explicit_refs to take a struct refspec
  remote: convert get_ref_match to take a struct refspec
  remote: convert query_refspecs to take a struct refspec
  remote: convert apply_refspecs to take a struct refspec
  remote: convert get_stale_heads to take a struct refspec
  fetch: convert prune_refs to take a struct refspec
  fetch: convert get_ref_map to take a struct refspec
  fetch: convert do_fetch to take a struct refspec
  refspec: remove the deprecated functions
  ...
2018-05-30 21:51:26 +09:00
Junio C Hamano
6ac5acae2d Merge branch 'sb/grep-die-on-unreadable-index'
Error behaviour of "git grep" when it cannot read the index was
inconsistent with other commands that uses the index, which has
been corrected to error out early.

* sb/grep-die-on-unreadable-index:
  grep: handle corrupt index files early
2018-05-30 21:51:26 +09:00
Junio C Hamano
42c8ce1c49 Merge branch 'bc/object-id'
Conversion from uchar[20] to struct object_id continues.

* bc/object-id: (42 commits)
  merge-one-file: compute empty blob object ID
  add--interactive: compute the empty tree value
  Update shell scripts to compute empty tree object ID
  sha1_file: only expose empty object constants through git_hash_algo
  dir: use the_hash_algo for empty blob object ID
  sequencer: use the_hash_algo for empty tree object ID
  cache-tree: use is_empty_tree_oid
  sha1_file: convert cached object code to struct object_id
  builtin/reset: convert use of EMPTY_TREE_SHA1_BIN
  builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEX
  wt-status: convert two uses of EMPTY_TREE_SHA1_HEX
  submodule: convert several uses of EMPTY_TREE_SHA1_HEX
  sequencer: convert one use of EMPTY_TREE_SHA1_HEX
  merge: convert empty tree constant to the_hash_algo
  builtin/merge: switch tree functions to use object_id
  builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo
  sha1-file: add functions for hex empty tree and blob OIDs
  builtin/receive-pack: avoid hard-coded constants for push certs
  diff: specify abbreviation size in terms of the_hash_algo
  upload-pack: replace use of several hard-coded constants
  ...
2018-05-30 14:04:10 +09:00
Junio C Hamano
3d24129799 Merge branch 'sb/blame-color'
"git blame" learns to unhighlight uninteresting metadata from the
originating commit on lines that are the same as the previous one,
and also paint lines in different colors depending on the age of
the commit.

* sb/blame-color:
  builtin/blame: add new coloring scheme config
  builtin/blame: highlight recently changed lines
  builtin/blame: dim uninteresting metadata lines
2018-05-30 14:04:09 +09:00
Junio C Hamano
2a98a8794e Merge branch 'cf/submodule-progress-dissociate'
"git submodule update" and "git submodule add" supported the
"--reference" option to borrow objects from a neighbouring local
repository like "git clone" does, but lacked the more recent
invention "--dissociate".  Also "git submodule add" has been taught
to take the "--progress" option.

* cf/submodule-progress-dissociate:
  submodule: add --dissociate option to add/update commands
  submodule: add --progress option to add command
  submodule: clean up substitutions in script
2018-05-30 14:04:09 +09:00
Junio C Hamano
5da4847dcc Merge branch 'bp/status-rename-config'
"git status" learned to honor a new status.renames configuration to
skip rename detection, which could be useful for those who want to
do so without disabling the default rename detection done by the
"git diff" command.

* bp/status-rename-config:
  add status config and command line options for rename detection
2018-05-30 14:04:07 +09:00
Junio C Hamano
50f08db594 Merge branch 'js/use-bug-macro'
Developer support update, by using BUG() macro instead of die() to
mark codepaths that should not happen more clearly.

* js/use-bug-macro:
  BUG_exit_code: fix sparse "symbol not declared" warning
  Convert remaining die*(BUG) messages
  Replace all die("BUG: ...") calls by BUG() ones
  run-command: use BUG() to report bugs, not die()
  test-tool: help verifying BUG() code paths
2018-05-30 14:04:07 +09:00
Junio C Hamano
bef896e4ab Merge branch 'rs/no-null-ptr-arith-in-fast-export'
Code clean-up to avoid non-standard-conformant pointer arithmetic.

* rs/no-null-ptr-arith-in-fast-export:
  fast-export: avoid NULL pointer arithmetic
2018-05-30 14:04:06 +09:00
Junio C Hamano
2f76ebc93c Merge branch 'ma/lockfile-cleanup'
Code clean-up to adjust to a more recent lockfile API convention that
allows lockfile instances kept on the stack.

* ma/lockfile-cleanup:
  lock_file: move static locks into functions
  lock_file: make function-local locks non-static
  refs.c: do not die if locking fails in `delete_pseudoref()`
  refs.c: do not die if locking fails in `write_pseudoref()`
  t/helper/test-write-cache: clean up lock-handling
2018-05-30 14:04:05 +09:00
Robert P. J. Day
44f560fc16 init: fix grammar in "templates not found" msg
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-30 13:32:40 +09:00
Junio C Hamano
7913f53b56 Sync with Git 2.17.1
* maint: (25 commits)
  Git 2.17.1
  Git 2.16.4
  Git 2.15.2
  Git 2.14.4
  Git 2.13.7
  fsck: complain when .gitmodules is a symlink
  index-pack: check .gitmodules files with --strict
  unpack-objects: call fsck_finish() after fscking objects
  fsck: call fsck_finish() after fscking objects
  fsck: check .gitmodules content
  fsck: handle promisor objects in .gitmodules check
  fsck: detect gitmodules files
  fsck: actually fsck blob data
  fsck: simplify ".git" check
  index-pack: make fsck error message more specific
  verify_path: disallow symlinks in .gitmodules
  update-index: stat updated files earlier
  verify_dotfile: mention case-insensitivity in comment
  verify_path: drop clever fallthrough
  skip_prefix: add case-insensitive variant
  ...
2018-05-29 17:10:05 +09:00
Nguyễn Thái Ngọc Duy
e17ca92637 completion: drop the hard coded list of config vars
The new help option --config-for-completion is a machine friendlier
version of --config where all the placeholders and wildcards are
dropped, leaving only the good, completable prefixes for
git-completion.bash to consume.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 14:51:28 +09:00
Nguyễn Thái Ngọc Duy
431bb23a27 am: move advice.amWorkDir parsing back to advice.c
The only benefit from this move (apart from cleaner code) is that
advice.amWorkDir should now show up in `git help --config`. There
should be no regression since advice config is always read by the
git_default_config().

While at there, use advise() like other code. We now get "hint: "
prefix and the output is stderr instead of stdout (which is also the
reason for the test update because stderr is checked in a following
test and the extra advice can fail it).

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 14:51:28 +09:00
Nguyễn Thái Ngọc Duy
3ac68a93fd help: add --config to list all available config
Sometimes it helps to list all available config vars so the user can
search for something they want. The config man page can also be used
but it's harder to search if you want to focus on the variable name,
for example.

This is not the best way to collect the available config since it's
not precise. Ideally we should have a centralized list of config in C
code (pretty much like 'struct option'), but that's a lot more work.
This will do for now.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 14:51:28 +09:00
Nguyễn Thái Ngọc Duy
a73b3680c4 Add and use generic name->id mapping code for color slot parsing
Instead of hard coding the name-to-id mapping in C code, keep it in an
array and use a common function to do the parsing. This reduces code
and also allows us to list all possible color slots later.

This starts using C99 designated initializers more for convenience
(the first designated initializers have been introduced in builtin/clean.c
for some time without complaints)

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 14:51:28 +09:00
Junio C Hamano
17b3e51505 Merge branch 'nd/command-list' into nd/complete-config-vars
* nd/command-list:
  completion: allow to customize the completable command list
  completion: add and use --list-cmds=alias
  completion: add and use --list-cmds=nohelpers
  Move declaration for alias.c to alias.h
  completion: reduce completable command list
  completion: let git provide the completable command list
  command-list.txt: documentation and guide line
  help: use command-list.txt for the source of guides
  help: add "-a --verbose" to list all commands with synopsis
  git: support --list-cmds=list-<category>
  completion: implement and use --list-cmds=main,others
  git --list-cmds: collect command list in a string_list
  git.c: convert --list-* to --list-cmds=*
  Remove common-cmds.h
  help: use command-list.h for common command list
  generate-cmds.sh: export all commands to command-list.h
  generate-cmds.sh: factor out synopsis extract code
2018-05-29 14:51:14 +09:00
Nguyễn Thái Ngọc Duy
3fe735e723 completion: suppress some -no- options
Most --no- options do have some use, even if rarely to negate some
option that's specified in an alias.

These options --no-ours and --no-theirs however have no clear
semantics. If I specify "--ours --no-theirs", the second will reset
writeout stage and is equivalent of "--no-ours --no-theirs" which is
not that easy to see. Drop them. You can either switch from --ours to
--theirs and back but you can never negate them.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 13:28:47 +09:00
Nguyễn Thái Ngọc Duy
0231ae71d3 diff: turn --ita-invisible-in-index on by default
Due to the implementation detail of intent-to-add entries, the current
"git diff" (i.e. no treeish or --cached argument) would show the
changes in the i-t-a file, but it does not mark the file as new, while
"diff --cached" would mark the file as new while showing its content
as empty.

     $ git diff                     | $ diff --cached
    --------------------------------|-------------------------------
     diff --git a/new b/new         | diff --git a/new b/new
     index e69de29..5ad28e2 100644  | new file mode 100644
     --- a/new                      | index 0000000..e69de29
     +++ b/new                      |
     @@ -0,0 +1 @@                  |
     +haha                          |

One evidence of the current output being wrong is that, the output
from "git diff" (with ita entries) cannot be applied because it
assumes empty files exist before applying.

Turning on --ita-invisible-in-index [1] [2] would fix this. The result
is "new file" line moving from "git diff --cached" to "git diff".

     $ git diff                     | $ diff --cached
    --------------------------------|-------------------------------
     diff --git a/new b/new         |
     new file mode 100644           |
     index 0000000..5ad28e2         |
     --- /dev/null                  |
     +++ b/new                      |
     @@ -0,0 +1 @@                  |
     +haha                          |

This option is on by default in git-status [1] but we need more fixup
in rename detection code [3]. Luckily we don't need to do anything
else for the rename detection code in diff.c (wt-status.c uses a
customized one).

[1] 425a28e0a4 (diff-lib: allow ita entries treated as "not yet exist
    in index" - 2016-10-24)
[2] b42b451919 (diff: add --ita-[in]visible-in-index - 2016-10-24)
[3] bc3dca07f4 (Merge branch 'nd/ita-wt-renames-in-status' - 2018-01-23)

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 12:38:49 +09:00
Jeff King
ff417260cf make show-index a builtin
The git-show-index command is built as its own separate
program. There's really no good reason for this, and it
means we waste extra space on disk (and CPU time running the
linker). Let's fold it in to the main binary as a builtin.

The history here is actually a bit amusing. The program
itself is mostly self-contained, and doesn't even use our
normal pack index code. In a5031214c4 (slim down "git
show-index", 2010-01-21), we even stopped using xmalloc() so
that it could avoid libgit.a entirely. But then 040a655116
(cleanup: use internal memory allocation wrapper functions
everywhere, 2011-10-06) switched that back to xmalloc, which
later become ALLOC_ARRAY().

Making it a builtin should give us the best of both worlds:
no wasted space and no need to avoid the usual patterns.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-29 00:28:22 +09:00
Elijah Newren
0ed556d38f rev-parse: check lookup'ed commit references for NULL
Commits 2122f8b963 ("rev-parse: Add support for the ^! and ^@ syntax",
2008-07-26) and 3dd4e7320d ("Teach rev-parse the ... syntax.", 2006-07-04)
taught rev-parse new syntax, and used lookup_commit_reference() as part of
their logic.  Neither usage checked the returned commit to see if it was
non-NULL before using it.  Check for NULL and ensure an appropriate error
is reported to the user.

Reported by Florian Weimer and Todd Zullinger.

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Elijah Newren <newren@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-25 10:46:42 +09:00
Nguyễn Thái Ngọc Duy
3e4a67b47d Use OPT_SET_INT_F() for cmdline option specification
The only thing these commands need is extra parseopt flag which can be
passed in by OPT_SET_INT_F() and it is a bit more compact than full
struct initialization.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-24 16:12:29 +09:00
Junio C Hamano
5a97e7be88 Merge branch 'nd/pack-unreachable-objects-doc'
Doc update.

* nd/pack-unreachable-objects-doc:
  pack-objects: validation and documentation about unreachable options
2018-05-23 14:38:24 +09:00
Junio C Hamano
1e174fdbe6 Merge branch 'em/status-rename-config'
"git status" learned to pay attention to UI related diff
configuration variables such as diff.renames.

* em/status-rename-config:
  wt-status: use settings from git_diff_ui_config
2018-05-23 14:38:23 +09:00
Junio C Hamano
4e0086bea1 Merge branch 'bc/format-patch-cover-no-attach'
"git format-patch --cover --attach" created a broken MIME multipart
message for the cover letter, which has been fixed by keeping the
cover letter as plain text file.

* bc/format-patch-cover-no-attach:
  format-patch: make cover letters always text/plain
2018-05-23 14:38:21 +09:00
Junio C Hamano
2c18e6ae24 Merge branch 'js/rebase-recreate-merge'
"git rebase" learned "--rebase-merges" to transplant the whole
topology of commit graph elsewhere.

* js/rebase-recreate-merge:
  rebase -i --rebase-merges: add a section to the man page
  rebase -i: introduce --rebase-merges=[no-]rebase-cousins
  pull: accept --rebase=merges to recreate the branch topology
  rebase --rebase-merges: avoid "empty merges"
  sequencer: handle post-rewrite for merge commands
  sequencer: make refs generated by the `label` command worktree-local
  rebase --rebase-merges: add test for --keep-empty
  rebase: introduce the --rebase-merges option
  rebase-helper --make-script: introduce a flag to rebase merges
  sequencer: fast-forward `merge` commands, if possible
  sequencer: introduce the `merge` command
  sequencer: introduce new commands to reset the revision
  git-rebase--interactive: clarify arguments
  sequencer: offer helpful advice when a command was rescheduled
  sequencer: refactor how original todo list lines are accessed
  sequencer: make rearrange_squash() a bit more obvious
  sequencer: avoid using errno clobbered by rollback_lock_file()
2018-05-23 14:38:20 +09:00
Junio C Hamano
ad635e82d6 Merge branch 'nd/pack-objects-pack-struct'
"git pack-objects" needs to allocate tons of "struct object_entry"
while doing its work, and shrinking its size helps the performance
quite a bit.

* nd/pack-objects-pack-struct:
  ci: exercise the whole test suite with uncommon code in pack-objects
  pack-objects: reorder members to shrink struct object_entry
  pack-objects: shrink delta_size field in struct object_entry
  pack-objects: shrink size field in struct object_entry
  pack-objects: clarify the use of object_entry::size
  pack-objects: don't check size when the object is bad
  pack-objects: shrink z_delta_size field in struct object_entry
  pack-objects: refer to delta objects by index instead of pointer
  pack-objects: move in_pack out of struct object_entry
  pack-objects: move in_pack_pos out of struct object_entry
  pack-objects: use bitfield for object_entry::depth
  pack-objects: use bitfield for object_entry::dfs_state
  pack-objects: turn type and in_pack_type to bitfields
  pack-objects: a bit of document about struct object_entry
  read-cache.c: make $GIT_TEST_SPLIT_INDEX boolean
2018-05-23 14:38:19 +09:00
Junio C Hamano
10174da9f1 Merge branch 'tg/worktree-add-existing-branch'
"git worktree add" learned to check out an existing branch.

* tg/worktree-add-existing-branch:
  worktree: teach "add" to check out existing branches
  worktree: factor out dwim_branch function
  worktree: improve message when creating a new worktree
  worktree: remove extra members from struct add_opts
2018-05-23 14:38:18 +09:00
Junio C Hamano
352cf6cfe1 Merge branch 'js/deprecate-grafts'
The functionality of "$GIT_DIR/info/grafts" has been superseded by
the "refs/replace/" mechanism for some time now, but the internal
code had support for it in many places, which has been cleaned up
in order to drop support of the "grafts" mechanism.

* js/deprecate-grafts:
  Remove obsolete script to convert grafts to replace refs
  technical/shallow: describe why shallow cannot use replace refs
  technical/shallow: stop referring to grafts
  filter-branch: stop suggesting to use grafts
  Deprecate support for .git/info/grafts
  Add a test for `git replace --convert-graft-file`
  replace: introduce --convert-graft-file
  replace: prepare create_graft() for converting graft files wholesale
  replace: "libify" create_graft() and callees
  replace: avoid using die() to indicate a bug
  commit: Let the callback of for_each_mergetag return on error
  argv_array: offer to split a string by whitespace
2018-05-23 14:38:17 +09:00
Junio C Hamano
fcb6df3254 Merge branch 'sb/oid-object-info'
The codepath around object-info API has been taught to take the
repository object (which in turn tells the API which object store
the objects are to be located).

* sb/oid-object-info:
  cache.h: allow oid_object_info to handle arbitrary repositories
  packfile: add repository argument to cache_or_unpack_entry
  packfile: add repository argument to unpack_entry
  packfile: add repository argument to read_object
  packfile: add repository argument to packed_object_info
  packfile: add repository argument to packed_to_object_type
  packfile: add repository argument to retry_bad_packed_offset
  cache.h: add repository argument to oid_object_info
  cache.h: add repository argument to oid_object_info_extended
2018-05-23 14:38:16 +09:00
Junio C Hamano
41267e9697 Merge branch 'bw/server-options'
The transport protocol v2 is getting updated further.

* bw/server-options:
  fetch: send server options when using protocol v2
  ls-remote: send server options when using protocol v2
  serve: introduce the server-option capability
2018-05-23 14:38:15 +09:00
Junio C Hamano
30b015bffe Merge branch 'nd/repack-keep-pack'
"git gc" in a large repository takes a lot of time as it considers
to repack all objects into one pack by default.  The command has
been taught to pretend as if the largest existing packfile is
marked with ".keep" so that it is left untouched while objects in
other packs and loose ones are repacked.

* nd/repack-keep-pack:
  pack-objects: show some progress when counting kept objects
  gc --auto: exclude base pack if not enough mem to "repack -ad"
  gc: handle a corner case in gc.bigPackThreshold
  gc: add gc.bigPackThreshold config
  gc: add --keep-largest-pack option
  repack: add --keep-pack option
  t7700: have closing quote of a test at the beginning of line
2018-05-23 14:38:14 +09:00
Junio C Hamano
c89b6e136e Merge branch 'ds/lazy-load-trees'
The code has been taught to use the duplicated information stored
in the commit-graph file to learn the tree object name for a commit
to avoid opening and parsing the commit object when it makes sense
to do so.

* ds/lazy-load-trees:
  coccinelle: avoid wrong transformation suggestions from commit.cocci
  commit-graph: lazy-load trees for commits
  treewide: replace maybe_tree with accessor methods
  commit: create get_commit_tree() method
  treewide: rename tree to maybe_tree
2018-05-23 14:38:13 +09:00
Junio C Hamano
05682ee270 Merge branch 'nd/term-columns'
The code did not propagate the terminal width to subprocesses via
COLUMNS environment variable, which it now does.  This caused
trouble to "git column" helper subprocess when "git tag --column=row"
tried to list the existing tags on a display with non-default width.

* nd/term-columns:
  column: fix off-by-one default width
  pager: set COLUMNS to term_columns()
2018-05-23 14:38:13 +09:00
Junio C Hamano
023020401d Sync with Git 2.15.2
* maint-2.15:
  Git 2.15.2
  Git 2.14.4
  Git 2.13.7
  verify_path: disallow symlinks in .gitmodules
  update-index: stat updated files earlier
  verify_dotfile: mention case-insensitivity in comment
  verify_path: drop clever fallthrough
  skip_prefix: add case-insensitive variant
  is_{hfs,ntfs}_dotgitmodules: add tests
  is_ntfs_dotgit: match other .git files
  is_hfs_dotgit: match other .git files
  is_ntfs_dotgit: use a size_t for traversing string
  submodule-config: verify submodule names as paths
2018-05-22 14:18:06 +09:00
Junio C Hamano
9e0f06d55d Sync with Git 2.14.4
* maint-2.14:
  Git 2.14.4
  Git 2.13.7
  verify_path: disallow symlinks in .gitmodules
  update-index: stat updated files earlier
  verify_dotfile: mention case-insensitivity in comment
  verify_path: drop clever fallthrough
  skip_prefix: add case-insensitive variant
  is_{hfs,ntfs}_dotgitmodules: add tests
  is_ntfs_dotgit: match other .git files
  is_hfs_dotgit: match other .git files
  is_ntfs_dotgit: use a size_t for traversing string
  submodule-config: verify submodule names as paths
2018-05-22 14:15:14 +09:00
Junio C Hamano
7b01c71b64 Sync with Git 2.13.7
* maint-2.13:
  Git 2.13.7
  verify_path: disallow symlinks in .gitmodules
  update-index: stat updated files earlier
  verify_dotfile: mention case-insensitivity in comment
  verify_path: drop clever fallthrough
  skip_prefix: add case-insensitive variant
  is_{hfs,ntfs}_dotgitmodules: add tests
  is_ntfs_dotgit: match other .git files
  is_hfs_dotgit: match other .git files
  is_ntfs_dotgit: use a size_t for traversing string
  submodule-config: verify submodule names as paths
2018-05-22 14:10:49 +09:00
Jeff King
73c3f0f704 index-pack: check .gitmodules files with --strict
Now that the internal fsck code has all of the plumbing we
need, we can start checking incoming .gitmodules files.
Naively, it seems like we would just need to add a call to
fsck_finish() after we've processed all of the objects. And
that would be enough to cover the initial test included
here. But there are two extra bits:

  1. We currently don't bother calling fsck_object() at all
     for blobs, since it has traditionally been a noop. We'd
     actually catch these blobs in fsck_finish() at the end,
     but it's more efficient to check them when we already
     have the object loaded in memory.

  2. The second pass done by fsck_finish() needs to access
     the objects, but we're actually indexing the pack in
     this process. In theory we could give the fsck code a
     special callback for accessing the in-pack data, but
     it's actually quite tricky:

       a. We don't have an internal efficient index mapping
	  oids to packfile offsets. We only generate it on
	  the fly as part of writing out the .idx file.

       b. We'd still have to reconstruct deltas, which means
          we'd basically have to replicate all of the
	  reading logic in packfile.c.

     Instead, let's avoid running fsck_finish() until after
     we've written out the .idx file, and then just add it
     to our internal packed_git list.

     This does mean that the objects are "in the repository"
     before we finish our fsck checks. But unpack-objects
     already exhibits this same behavior, and it's an
     acceptable tradeoff here for the same reason: the
     quarantine mechanism means that pushes will be
     fully protected.

In addition to a basic push test in t7415, we add a sneaky
pack that reverses the usual object order in the pack,
requiring that index-pack access the tree and blob during
the "finish" step.

This already works for unpack-objects (since it will have
written out loose objects), but we'll check it with this
sneaky pack for good measure.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:55:12 -04:00
Jeff King
6e328d6cae unpack-objects: call fsck_finish() after fscking objects
As with the previous commit, we must call fsck's "finish"
function in order to catch any queued objects for
.gitmodules checks.

This second pass will be able to access any incoming
objects, because we will have exploded them to loose objects
by now.

This isn't quite ideal, because it means that bad objects
may have been written to the object database (and a
subsequent operation could then reference them, even if the
other side doesn't send the objects again). However, this is
sufficient when used with receive.fsckObjects, since those
loose objects will all be placed in a temporary quarantine
area that will get wiped if we find any problems.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:55:12 -04:00
Jeff King
1995b5e03e fsck: call fsck_finish() after fscking objects
Now that the internal fsck code is capable of checking
.gitmodules files, we just need to teach its callers to use
the "finish" function to check any queued objects.

With this, we can now catch the malicious case in t7415 with
git-fsck.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:55:12 -04:00
Jeff King
7ac4f3a007 fsck: actually fsck blob data
Because fscking a blob has always been a noop, we didn't
bother passing around the blob data. In preparation for
content-level checks, let's fix up a few things:

  1. The fsck_object() function just returns success for any
     blob. Let's a noop fsck_blob(), which we can fill in
     with actual logic later.

  2. The fsck_loose() function in builtin/fsck.c
     just threw away blob content after loading it. Let's
     hold onto it until after we've called fsck_object().

     The easiest way to do this is to just drop the
     parse_loose_object() helper entirely. Incidentally,
     this also fixes a memory leak: if we successfully
     loaded the object data but did not parse it, we would
     have left the function without freeing it.

  3. When fsck_loose() loads the object data, it
     does so with a custom read_loose_object() helper. This
     function streams any blobs, regardless of size, under
     the assumption that we're only checking the sha1.

     Instead, let's actually load blobs smaller than
     big_file_threshold, as the normal object-reading
     code-paths would do. This lets us fsck small files, and
     a NULL return is an indication that the blob was so big
     that it needed to be streamed, and we can pass that
     information along to fsck_blob().

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:55:12 -04:00
Jeff King
db5a58c1bd index-pack: make fsck error message more specific
If fsck reports an error, we say only "Error in object".
This isn't quite as bad as it might seem, since the fsck
code would have dumped some errors to stderr already. But it
might help to give a little more context. The earlier output
would not have even mentioned "fsck", and that may be a clue
that the "fsck.*" or "*.fsckObjects" config may be relevant.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:55:12 -04:00
Jeff King
eedd5949f5 Merge branch 'jk/submodule-name-verify-fix' into jk/submodule-name-verify-fsck
* jk/submodule-name-verify-fix:
  verify_path: disallow symlinks in .gitmodules
  update-index: stat updated files earlier
  verify_path: drop clever fallthrough
  skip_prefix: add icase-insensitive variant
  is_{hfs,ntfs}_dotgitmodules: add tests
  path: match NTFS short names for more .git files
  is_hfs_dotgit: match other .git files
  is_ntfs_dotgit: use a size_t for traversing string
  submodule-config: verify submodule names as paths

Note that this includes two bits of evil-merge:

 - there's a new call to verify_path() that doesn't actually
   have a mode available. It should be OK to pass "0" here,
   since we're just manipulating the untracked cache, not an
   actual index entry.

 - the lstat() in builtin/update-index.c:update_one() needs
   to be updated to handle the fsmonitor case (without this
   it still behaves correctly, but does an unnecessary
   lstat).
2018-05-21 23:54:28 -04:00
Jeff King
10ecfa7649 verify_path: disallow symlinks in .gitmodules
There are a few reasons it's not a good idea to make
.gitmodules a symlink, including:

  1. It won't be portable to systems without symlinks.

  2. It may behave inconsistently, since Git may look at
     this file in the index or a tree without bothering to
     resolve any symbolic links. We don't do this _yet_, but
     the config infrastructure is there and it's planned for
     the future.

With some clever code, we could make (2) work. And some
people may not care about (1) if they only work on one
platform. But there are a few security reasons to simply
disallow it:

  a. A symlinked .gitmodules file may circumvent any fsck
     checks of the content.

  b. Git may read and write from the on-disk file without
     sanity checking the symlink target. So for example, if
     you link ".gitmodules" to "../oops" and run "git
     submodule add", we'll write to the file "oops" outside
     the repository.

Again, both of those are problems that _could_ be solved
with sufficient code, but given the complications in (1) and
(2), we're better off just outlawing it explicitly.

Note the slightly tricky call to verify_path() in
update-index's update_one(). There we may not have a mode if
we're not updating from the filesystem (e.g., we might just
be removing the file). Passing "0" as the mode there works
fine; since it's not a symlink, we'll just skip the extra
checks.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:50:11 -04:00
Jeff King
eb12dd0c76 update-index: stat updated files earlier
In the update_one(), we check verify_path() on the proposed
path before doing anything else. In preparation for having
verify_path() look at the file mode, let's stat the file
earlier, so we can check the mode accurately.

This is made a bit trickier by the fact that this function
only does an lstat in a few code paths (the ones that flow
down through process_path()). So we can speculatively do the
lstat() here and pass the results down, and just use a dummy
mode for cases where we won't actually be updating the index
from the filesystem.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:50:11 -04:00
Jeff King
0383bbb901 submodule-config: verify submodule names as paths
Submodule "names" come from the untrusted .gitmodules file,
but we blindly append them to $GIT_DIR/modules to create our
on-disk repo paths. This means you can do bad things by
putting "../" into the name (among other things).

Let's sanity-check these names to avoid building a path that
can be exploited. There are two main decisions:

  1. What should the allowed syntax be?

     It's tempting to reuse verify_path(), since submodule
     names typically come from in-repo paths. But there are
     two reasons not to:

       a. It's technically more strict than what we need, as
          we really care only about breaking out of the
          $GIT_DIR/modules/ hierarchy.  E.g., having a
          submodule named "foo/.git" isn't actually
          dangerous, and it's possible that somebody has
          manually given such a funny name.

       b. Since we'll eventually use this checking logic in
          fsck to prevent downstream repositories, it should
          be consistent across platforms. Because
          verify_path() relies on is_dir_sep(), it wouldn't
          block "foo\..\bar" on a non-Windows machine.

  2. Where should we enforce it? These days most of the
     .gitmodules reads go through submodule-config.c, so
     I've put it there in the reading step. That should
     cover all of the C code.

     We also construct the name for "git submodule add"
     inside the git-submodule.sh script. This is probably
     not a big deal for security since the name is coming
     from the user anyway, but it would be polite to remind
     them if the name they pick is invalid (and we need to
     expose the name-checker to the shell anyway for our
     test scripts).

     This patch issues a warning when reading .gitmodules
     and just ignores the related config entry completely.
     This will generally end up producing a sensible error,
     as it works the same as a .gitmodules file which is
     missing a submodule entry (so "submodule update" will
     barf, but "git clone --recurse-submodules" will print
     an error but not abort the clone.

     There is one minor oddity, which is that we print the
     warning once per malformed config key (since that's how
     the config subsystem gives us the entries). So in the
     new test, for example, the user would see three
     warnings. That's OK, since the intent is that this case
     should never come up outside of malicious repositories
     (and then it might even benefit the user to see the
     message multiple times).

Credit for finding this vulnerability and the proof of
concept from which the test script was adapted goes to
Etienne Stalmans.

Signed-off-by: Jeff King <peff@peff.net>
2018-05-21 23:50:11 -04:00
Derrick Stolee
7adf526670 merge: check config before loading commits
Now that we use generation numbers from the commit-graph, we must
ensure that all commits that exist in the commit-graph are loaded
from that file instead of from the object database. Since the
commit-graph file is only checked if core.commitGraph is true, we
must check the default config before we load any commits.

In the merge builtin, the config was checked after loading the HEAD
commit. This was due to the use of the global 'branch' when checking
merge-specific config settings.

Move the config load to be between the initialization of 'branch' and
the commit lookup.

Without this change, a fast-forward merge would hit a BUG("bad
generation skip") statement in commit.c during paint_down_to_common().
This is because the HEAD commit would be loaded with "infinite"
generation but then reached by commits with "finite" generation
numbers.

Add a test to t5318-commit-graph.sh that exercises this code path to
prevent a regression.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-22 12:36:34 +09:00
Casey Fitzpatrick
a0ef29341a submodule: add --dissociate option to add/update commands
Add --dissociate option to add and update commands, both clone helper commands
that already have the --reference option --dissociate pairs with.

Signed-off-by: Casey Fitzpatrick <kcghost@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-22 12:22:42 +09:00
Martin Ågren
1c41d2805e unpack_trees_options: free messages when done
The strings allocated in `setup_unpack_trees_porcelain()` are never
freed. Provide a function `clear_unpack_trees_porcelain()` to do so and
call it where we use `setup_unpack_trees_porcelain()`. The only
non-trivial user is `unpack_trees_start()`, where we should place the
new call in `unpack_trees_finish()`.

We keep the string pointers in an array, mixing pointers to static
memory and memory that we allocate on the heap. We also keep several
copies of the individual pointers. So we need to make sure that we do
not free what we must not free and that we do not double-free. Let a
separate argv_array take ownership of all the strings we create so that
we can easily free them.

Zero the whole array of string pointers to make sure that we do not
leave any dangling pointers.

Note that we only take responsibility for the memory allocated in
`setup_unpack_trees_porcelain()` and not any other members of the
`struct unpack_trees_options`.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-22 11:59:31 +09:00
Nguyễn Thái Ngọc Duy
e2e5ac2303 merge: use commit-slab in merge remote desc instead of commit->util
It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
7b680d32f3 log: use commit-slab in prepare_bases() instead of commit->util
It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
44cecbf8a0 show-branch: note about its object flags usage
This is another candidate for commit-slab. Keep Junio's observation in
code so we can search it later on when somebody wants to improve the
code.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
60855a5343 show-branch: use commit-slab for commit-name instead of commit->util
It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
8fd79a7304 name-rev: use commit-slab for rev-name instead of commit->util
It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
87be252333 revision.c: use commit-slab for show_source
Instead of relying on commit->util to store the source string, let the
user provide a commit-slab to store the source strings in.

It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
c6b7206b0d describe: use commit-slab for commit names instead of commit->util
It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
4e0df4e663 blame: use commit-slab for blame suspects instead of commit->util
It's done so that commit->util can be removed. See more explanation in
the commit that removes commit->util.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 14:07:20 +09:00
Nguyễn Thái Ngọc Duy
65b5f9483e Move declaration for alias.c to alias.h
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 13:23:14 +09:00
Nguyễn Thái Ngọc Duy
1b81d8cb19 help: use command-list.txt for the source of guides
The help command currently hard codes the list of guides and their
summary in C. Let's move this list to command-list.txt. This lets us
extract summary lines from Documentation/git*.txt. This also
potentially lets us list guides in git.txt, but I'll leave that for
now.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 13:23:14 +09:00
Nguyễn Thái Ngọc Duy
63eae83f8f help: add "-a --verbose" to list all commands with synopsis
This lists all recognized commands [1] by category. The group order
follows closely git.txt.

[1] We may actually show commands that are not built (e.g. if you set
NO_PERL you don't have git-instaweb but it's still listed here). I
ignore the problem because on Linux a git package could be split
anyway. The "git-core" package may not contain git-instaweb even if
it's built because it may end up in a separate package. We can't know
anyway.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 13:23:14 +09:00
Jeff King
17b8a2d6cd config: die when --blob is used outside a repository
If you run "config --blob" outside of a repository, then we
eventually try to resolve the blob name and hit a BUG().
Let's catch this earlier and provide a useful message.

Note that we could also catch this much lower in the stack,
in git_config_from_blob_ref(). That might cover other
callsites, too, but it's unclear whether those ones would
actually be bugs or not. So let's leave the low-level
functions to assume the caller knows what it's doing (and
BUG() if it turns out it doesn't).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 09:47:13 +09:00
Stefan Beller
102de880d2 path.c: migrate global git_path_* to take a repository argument
Migrate all git_path_* functions that are defined in path.c to take a
repository argument. Unlike other patches in this series, do not use the
 #define trick, as we rewrite the whole function, which is rather small.

This doesn't migrate all the functions, as other builtins have their own
local path functions defined using GIT_PATH_FUNC. So keep that macro
around to serve the other locations.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 08:13:10 +09:00
Stefan Beller
c88134870e shallow: add repository argument to is_repository_shallow
Add a repository argument to allow callers of is_repository_shallow
to be more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 08:13:10 +09:00
Stefan Beller
19143f139d shallow: add repository argument to register_shallow
Add a repository argument to allow callers of register_shallow
to be more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 08:13:10 +09:00
Brandon Williams
dcc73cf7ff fetch: generate ref-prefixes when using a configured refspec
Teach fetch to generate ref-prefixes, to be used for server-side
filtering of the ref-advertisement, based on the configured fetch
refspec ('remote.<name>.fetch') when no user provided refspec exists.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:35:37 +09:00
Brandon Williams
6373cb598e refspec: consolidate ref-prefix generation logic
When using protocol v2 a client constructs a list of ref-prefixes which
are sent across the wire so that the server can do server-side filtering
of the ref-advertisement.  The logic that does this exists for both
fetch and push (even though no push support for v2 currently exists yet)
and is roughly the same so lets consolidate this logic and make it
general enough that it can be used for both the push and fetch cases.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:35:35 +09:00
Brandon Williams
5c7ec8462d remote: convert match_push_refs to take a struct refspec
Convert 'match_push_refs()' to take a 'struct refspec' as a parameter
instead of an array of 'const char *'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:44 +09:00
Brandon Williams
7a78a82b6c transport: remove transport_verify_remote_names
Remove 'transprot_verify_remote_names()' because all callers have
migrated to using 'struct refspec' which performs the same checks in
'parse_refspec()'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:44 +09:00
Brandon Williams
168dba68c9 send-pack: store refspecs in a struct refspec
Convert send-pack.c to store refspecs in a 'struct refspec' instead of
as an array of 'const char *'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:44 +09:00
Brandon Williams
306f22dbc8 transport: convert transport_push to take a struct refspec
Convert 'transport_push()' to take a 'struct refspec' as a
parameter instead of an array of strings which represent
refspecs.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:44 +09:00
Brandon Williams
aa40289ce9 push: convert to use struct refspec
Convert the refspecs in builtin/push.c to be stored in a 'struct
refspec' instead of being stored in a list of 'struct refspec_item's.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:44 +09:00
Brandon Williams
800a4ab399 push: check for errors earlier
Move the error checking for using the "--mirror", "--all", and "--tags"
options earlier and explicitly check for the presence of the flags
instead of checking for a side-effect of the flag.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:44 +09:00
Brandon Williams
86baf82521 remote: convert query_refspecs to take a struct refspec
Convert 'query_refspecs()' to take a 'struct refspec' as a parameter instead
of a list of 'struct refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
d000414e26 remote: convert apply_refspecs to take a struct refspec
Convert 'apply_refspecs()' to take a 'struct refspec' as a parameter instead
of a list of 'struct refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
a2ac50cbfd remote: convert get_stale_heads to take a struct refspec
Convert 'get_stale_heads()' to take a 'struct refspec' as a parameter instead
of a list of 'struct refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
def11e7193 fetch: convert prune_refs to take a struct refspec
Convert 'prune_refs()' to take a 'struct refspec' as a parameter instead
of a list of 'struct refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
65d96c8b7d fetch: convert get_ref_map to take a struct refspec
Convert 'get_ref_map()' to take a 'struct refspec' as a parameter
instead of a list of 'struct refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
65a1301f2e fetch: convert do_fetch to take a struct refspec
Convert 'do_fetch()' to take a 'struct refspec' as a parameter instead
of a list of 'struct refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
e4cffacc80 fetch: convert refmap to use struct refspec
Convert the refmap in builtin/fetch.c to be stored in a
'struct refspec'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
d7c8e30716 fetch: convert fetch_one to use struct refspec
Convert 'fetch_one()' to use 'struct refspec'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
9530350096 remote: remove add_prune_tags_to_fetch_refspec
Remove 'add_prune_tags_to_fetch_refspec()' function and instead have the
only caller directly add the tag refspec using 'refspec_append()'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:43 +09:00
Brandon Williams
e5349abf93 remote: convert fetch refspecs to struct refspec
Convert the set of fetch refspecs stored in 'struct remote' to use
'struct refspec'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:42 +09:00
Brandon Williams
6bdb304b10 remote: convert push refspecs to struct refspec
Convert the set of push refspecs stored in 'struct remote' to use
'struct refspec'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:42 +09:00
Brandon Williams
16eefc8eb3 fast-export: convert to use struct refspec
Convert fast-export to use 'struct refspec' instead of using a list of
refspec_item's.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:42 +09:00
Brandon Williams
eace274df8 clone: convert cmd_clone to use refspec_item_init
Convert 'cmd_clone()' to use 'refspec_item_init()' instead of relying on
the old 'parse_fetch_refspec()' to initialize a single refspec item.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:42 +09:00
Brandon Williams
895d391258 pull: convert get_tracking_branch to use refspec_item_init
Convert 'get_tracking_branch()' to use 'refspec_item_init()' instead of
the old 'parse_fetch_refspec()' function.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:42 +09:00
Brandon Williams
9c8361b289 submodule--helper: convert push_check to use struct refspec
Convert 'push_check()' to use 'struct refspec'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:42 +09:00
Brandon Williams
0ad4a5ff50 refspec: rename struct refspec to struct refspec_item
In preparation for introducing an abstraction around a collection of
refspecs (much like how a 'struct pathspec' is a collection of 'struct
pathspec_item's) rename the existing 'struct refspec' to 'struct
refspec_item'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:41 +09:00
Brandon Williams
ec0cb49655 refspec: move refspec parsing logic into its own file
In preparation for performing a refactor on refspec related code, move
the refspec parsing logic into its own file.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-18 06:19:41 +09:00
Jonathan Nieder
3f5787f806 commit: add repository argument to register_commit_graft
Add a repository argument to allow callers of register_commit_graft to
be more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-16 11:42:03 +09:00
Stefan Beller
cbd53a2193 object-store: move object access functions to object-store.h
This should make these functions easier to find and cache.h less
overwhelming to read.

In particular, this moves:
- read_object_file
- oid_object_info
- write_object_file

As a result, most of the codebase needs to #include object-store.h.
In this patch the #include is only added to files that would fail to
compile otherwise.  It would be better to #include wherever
identifiers from the header are used.  That can happen later
when we have better tooling for it.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-16 11:42:03 +09:00
Stefan Beller
b2aa84c789 grep: handle corrupt index files early
Any other caller of 'repo_read_index' dies upon a negative return of
it, so grep should, too.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-16 09:48:32 +09:00
Ben Peart
e8b2dc2c2a add status config and command line options for rename detection
After performing a merge that has conflicts git status will, by default,
attempt to detect renames which causes many objects to be examined.  In a
virtualized repo, those objects do not exist locally so the rename logic
triggers them to be fetched from the server. This results in the status call
taking hours to complete on very large repos vs seconds with this patch.

Add a new config status.renames setting to enable turning off rename
detection during status and commit.  This setting will default to the value
of diff.renames.

Add a new config status.renamelimit setting to to enable bounding the time
spent finding out inexact renames during status and commit.  This setting
will default to the value of diff.renamelimit.

Add --no-renames command line option to status that enables overriding the
config setting from the command line. Add --find-renames[=<n>] command line
option to status that enables detecting renames and optionally setting the
similarity index.

Reviewed-by: Elijah Newren <newren@gmail.com>
Original-Patch-by: Alejandro Pauly <alpauly@microsoft.com>
Signed-off-by: Ben Peart <Ben.Peart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-13 10:57:37 +09:00
Nguyễn Thái Ngọc Duy
b5d5a567fb column: fix off-by-one default width
By default we want to fill the whole screen if possible, but we do not
want to use up _all_ terminal columns because the last character is
going hit the border, push the cursor over and wrap. Keep it at
default value zero, which will make print_columns() set the width at
term_columns() - 1.

This affects the test in t7004 because effective column width before
was 40 but now 39 so we need to compensate it by one or the output at
39 columns has a different layout.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-13 10:45:05 +09:00
Prathamesh Chavan
fc1b9243cd submodule: port submodule subcommand 'foreach' from shell to C
This aims to make git-submodule foreach a builtin. 'foreach' is ported to
the submodule--helper, and submodule--helper is called from
git-submodule.sh.

Helped-by: Brandon Williams <bmwill@google.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Prathamesh Chavan <pc44800@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-11 10:11:54 +09:00
René Scharfe
c112084af9 fast-export: avoid NULL pointer arithmetic
Clang 6 reports the following warning, which is turned into an error in a
DEVELOPER build:

	builtin/fast-export.c:162:28: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
		return ((uint32_t *)NULL) + mark;
		       ~~~~~~~~~~~~~~~~~~ ^
	1 error generated.

The compiler is correct, and the error message speaks for itself.  There
is no need for any undefined operation -- just cast mark to void * or
uint32_t after an intermediate cast to uintptr_t.  That encodes the
integer value into a pointer and later decodes it as intended.

While at it remove an outdated comment -- intptr_t has been used since
ffe659f94d (parse-options: make some arguments optional, add callbacks),
committed in October 2007.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-10 18:29:57 +09:00
Martin Ågren
0fa5a2ed8d lock_file: move static locks into functions
Placing `struct lock_file`s on the stack used to be a bad idea, because
the temp- and lockfile-machinery would keep a pointer into the struct.
But after 076aa2cbd (tempfile: auto-allocate tempfiles on heap,
2017-09-05), we can safely have lockfiles on the stack. (This applies
even if a user returns early, leaving a locked lock behind.)

Each of these `struct lock_file`s is used from within a single function.
Move them into the respective functions to make the scope clearer and
drop the staticness.

For good measure, I have inspected these sites and come to believe that
they always release the lock, with the possible exception of bailing out
using `die()` or `exit()` or by returning from a `cmd_foo()`.

As pointed out by Jeff King, it would be bad if someone held on to a
`struct lock_file *` for some reason. After some grepping, I agree with
his findings: no-one appears to be doing that.

After this commit, the remaining occurrences of "static struct
lock_file" are locks that are used from within different functions. That
is, they need to remain static. (Short of more intrusive changes like
passing around pointers to non-static locks.)

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-10 14:55:40 +09:00
Martin Ågren
b227586831 lock_file: make function-local locks non-static
Placing `struct lock_file`s on the stack used to be a bad idea, because
the temp- and lockfile-machinery would keep a pointer into the struct.
But after 076aa2cbd (tempfile: auto-allocate tempfiles on heap,
2017-09-05), we can safely have lockfiles on the stack. (This applies
even if a user returns early, leaving a locked lock behind.)

These `struct lock_file`s are local to their respective functions and we
can drop their staticness.

For good measure, I have inspected these sites and come to believe that
they always release the lock, with the possible exception of bailing out
using `die()` or `exit()` or by returning from a `cmd_foo()`.

As pointed out by Jeff King, it would be bad if someone held on to a
`struct lock_file *` for some reason. After some grepping, I agree with
his findings: no-one appears to be doing that.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-10 14:54:45 +09:00
Junio C Hamano
a56fb3dcc0 Merge branch 'js/colored-push-errors'
Error messages from "git push" can be painted for more visibility.

* js/colored-push-errors:
  config: document the settings to colorize push errors/hints
  push: test to verify that push errors are colored
  push: colorize errors
  color: introduce support for colorizing stderr
2018-05-08 15:59:34 +09:00
Junio C Hamano
3915f9a4fa Merge branch 'jc/parseopt-expiry-errors'
"git gc --prune=nonsense" spent long time repacking and then
silently failed when underlying "git prune --expire=nonsense"
failed to parse its command line.  This has been corrected.

* jc/parseopt-expiry-errors:
  parseopt: handle malformed --expire arguments more nicely
  gc: do not upcase error message shown with die()
2018-05-08 15:59:33 +09:00
Junio C Hamano
ad3207e6ff Merge branch 'ma/fast-export-skip-merge-fix'
"git fast-export" had a regression in v2.15.0 era where it skipped
some merge commits in certain cases, which has been corrected.

* ma/fast-export-skip-merge-fix:
  fast-export: fix regression skipping some merge-commits
2018-05-08 15:59:33 +09:00
Junio C Hamano
0cd58d8ba9 Merge branch 'nd/submodule-status-fix'
"git submodule status" did not check the symbolic revision name it
computed for the submodule HEAD is not the NULL, and threw it at
printf routines, which has been corrected.

* nd/submodule-status-fix:
  submodule--helper: don't print null in 'submodule status'
2018-05-08 15:59:31 +09:00
Junio C Hamano
6c0110ff06 Merge branch 'hn/sort-ls-remote'
"git ls-remote" learned an option to allow sorting its output based
on the refnames being shown.

* hn/sort-ls-remote:
  ls-remote: create '--sort' option
2018-05-08 15:59:29 +09:00
Junio C Hamano
00bb99c424 Merge branch 'tb/config-default'
"git config --get" learned the "--default" option, to help the
calling script.  Building on top of the tb/config-type topic, the
"git config" learns "--type=color" type.  Taken together, you can
do things like "git config --get foo.color --default blue" and get
the ANSI color sequence for the color given to foo.color variable,
or "blue" if the variable does not exist.

* tb/config-default:
  builtin/config: introduce `color` type specifier
  config.c: introduce 'git_config_color' to parse ANSI colors
  builtin/config: introduce `--default`
2018-05-08 15:59:27 +09:00
Junio C Hamano
e3e042b185 Merge branch 'tb/config-type'
The "git config" command uses separate options e.g. "--int",
"--bool", etc. to specify what type the caller wants the value to
be interpreted as.  A new "--type=<typename>" option has been
introduced, which would make it cleaner to define new types.

* tb/config-type:
  builtin/config.c: support `--type=<type>` as preferred alias for `--<type>`
  builtin/config.c: treat type specifiers singularly
2018-05-08 15:59:26 +09:00
Junio C Hamano
90186fa057 Merge branch 'sb/worktree-remove-opt-force'
"git worktree remove" learned that "-f" is a shorthand for
"--force" option, just like for "git worktree add".

* sb/worktree-remove-opt-force:
  worktree: accept -f as short for --force for removal
2018-05-08 15:59:24 +09:00
Junio C Hamano
174774cd51 Merge branch 'sb/object-store-replace'
The effort to pass the repository in-core structure throughout the
API continues.  This round deals with the code that implements the
refs/replace/ mechanism.

* sb/object-store-replace:
  replace-object: allow lookup_replace_object to handle arbitrary repositories
  replace-object: allow do_lookup_replace_object to handle arbitrary repositories
  replace-object: allow prepare_replace_object to handle arbitrary repositories
  refs: allow for_each_replace_ref to handle arbitrary repositories
  refs: store the main ref store inside the repository struct
  replace-object: add repository argument to lookup_replace_object
  replace-object: add repository argument to do_lookup_replace_object
  replace-object: add repository argument to prepare_replace_object
  refs: add repository argument to for_each_replace_ref
  refs: add repository argument to get_main_ref_store
  replace-object: check_replace_refs is safe in multi repo environment
  replace-object: eliminate replace objects prepared flag
  object-store: move lookup_replace_object to replace-object.h
  replace-object: move replace_map to object store
  replace_object: use oidmap
2018-05-08 15:59:21 +09:00
Junio C Hamano
b10edb2df5 Merge branch 'ds/commit-graph'
Precompute and store information necessary for ancestry traversal
in a separate file to optimize graph walking.

* ds/commit-graph:
  commit-graph: implement "--append" option
  commit-graph: build graph from starting commits
  commit-graph: read only from specific pack-indexes
  commit: integrate commit graph with commit parsing
  commit-graph: close under reachability
  commit-graph: add core.commitGraph setting
  commit-graph: implement git commit-graph read
  commit-graph: implement git-commit-graph write
  commit-graph: implement write_commit_graph()
  commit-graph: create git-commit-graph builtin
  graph: add commit graph design document
  commit-graph: add format document
  csum-file: refactor finalize_hashfile() method
  csum-file: rename hashclose() to finalize_hashfile()
2018-05-08 15:59:20 +09:00
Junio C Hamano
b7da73ac8b Merge branch 'ot/libify-get-ref-atom-value'
Code restructuring, in preparation for further work.

* ot/libify-get-ref-atom-value:
  ref-filter: libify get_ref_atom_value()
  ref-filter: add return value to parsers
  ref-filter: change parsing function error handling
  ref-filter: add return value && strbuf to handlers
  ref-filter: start adding strbufs with errors
  ref-filter: add shortcut to work with strbufs
2018-05-08 15:59:18 +09:00
Junio C Hamano
0c7ecb7c31 Merge branch 'sb/submodule-move-nested'
Moving a submodule that itself has submodule in it with "git mv"
forgot to make necessary adjustment to the nested sub-submodules;
now the codepath learned to recurse into the submodules.

* sb/submodule-move-nested:
  submodule: fixup nested submodules after moving the submodule
  submodule-config: remove submodule_from_cache
  submodule-config: add repository argument to submodule_from_{name, path}
  submodule-config: allow submodule_free to handle arbitrary repositories
  grep: remove "repo" arg from non-supporting funcs
  submodule.h: drop declaration of connect_work_tree_and_git_dir
2018-05-08 15:59:17 +09:00
Junio C Hamano
9bfa0f9be3 Merge branch 'bw/protocol-v2'
The beginning of the next-gen transfer protocol.

* bw/protocol-v2: (35 commits)
  remote-curl: don't request v2 when pushing
  remote-curl: implement stateless-connect command
  http: eliminate "# service" line when using protocol v2
  http: don't always add Git-Protocol header
  http: allow providing extra headers for http requests
  remote-curl: store the protocol version the server responded with
  remote-curl: create copy of the service name
  pkt-line: add packet_buf_write_len function
  transport-helper: introduce stateless-connect
  transport-helper: refactor process_connect_service
  transport-helper: remove name parameter
  connect: don't request v2 when pushing
  connect: refactor git_connect to only get the protocol version once
  fetch-pack: support shallow requests
  fetch-pack: perform a fetch using v2
  upload-pack: introduce fetch server command
  push: pass ref prefixes when pushing
  fetch: pass ref prefixes when fetching
  ls-remote: pass ref prefixes when requesting a remote's refs
  transport: convert transport_get_remote_refs to take a list of ref prefixes
  ...
2018-05-08 15:59:16 +09:00
Johannes Schindelin
033abf97fc Replace all die("BUG: ...") calls by BUG() ones
In d8193743e0 (usage.c: add BUG() function, 2017-05-12), a new macro
was introduced to use for reporting bugs instead of die(). It was then
subsequently used to convert one single caller in 588a538ae5
(setup_git_env: convert die("BUG") to BUG(), 2017-05-12).

The cover letter of the patch series containing this patch
(cf 20170513032414.mfrwabt4hovujde2@sigill.intra.peff.net) is not
terribly clear why only one call site was converted, or what the plan
is for other, similar calls to die() to report bugs.

Let's just convert all remaining ones in one fell swoop.

This trick was performed by this invocation:

	sed -i 's/die("BUG: /BUG("/g' $(git grep -l 'die("BUG' \*.c)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-06 19:06:13 +09:00
Nguyễn Thái Ngọc Duy
58bd77b66a pack-objects: validation and documentation about unreachable options
These options are added in [1] [2] [3]. All these depend on running
rev-list internally which is normally true since they are always used
with "--all --objects" which implies --revs. But let's keep this
dependency explicit.

While at there, add documentation for them. These are mostly used
internally by git-repack. But it's still good to not chase down the
right commit message to know how they work.

[1] ca11b212eb (let pack-objects do the writing of unreachable objects
    as loose objects - 2008-05-14)
[2] 08cdfb1337 (pack-objects --keep-unreachable - 2007-09-16)
[3] e26a8c4721 (repack: extend --keep-unreachable to loose objects -
    2016-06-13)

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-06 18:49:32 +09:00
Eckhard S. Maaß
dc6b1d92ca wt-status: use settings from git_diff_ui_config
If you do something like

    - git add .
    - git status
    - git commit
    - git show (or git diff HEAD)

one would expect to have analogous output from git status and git show
(or similar diff-related programs). This is generally not the case, as
git status has hard coded values for diff related options.

With this commit the hard coded settings are dropped from the status
command in favour for values provided by git_diff_ui_config.

What follows are some remarks on the concrete options which were hard
coded in git status:

diffopt.detect_rename

Since the very beginning of git status in a3e870f2e2 ("Add "commit"
helper script", 2005-05-30), git status always used rename detection,
whereas with commands like show and log one had to activate it with a
command line option. After 5404c116aa ("diff: activate diff.renames by
default", 2016-02-25) the default behaves the same by coincidence, but
changing diff.renames to other values can break the consistency between
git status and other commands again. With this commit one control the
same default behaviour with diff.renames.

diffopt.rename_limit

Similarly one has the option diff.renamelimit to adjust this limit for
all commands but git status. With this commit git status will also honor
those.

diffopt.break_opt

Unlike the other two options this cannot be configured by a
configuration option yet. This commit will also change the default
behaviour to not use break rewrites. But as rename detection is most
likely on, this is dangerous to be activated anyway as one can see
here:

    https://public-inbox.org/git/xmqqegqaahnh.fsf@gitster.dls.corp.google.com/

Signed-off-by: Eckhard S. Maaß <eckhard.s.maass@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-06 12:59:33 +09:00
brian m. carlson
d8448522d8 builtin/reset: convert use of EMPTY_TREE_SHA1_BIN
Convert the last use of EMPTY_TREE_SHA1_BIN to use a direct copy from
the_hash_algo->empty_tree to avoid a dependency on a given hash
algorithm.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:52 +09:00
brian m. carlson
c00866a2cc builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEX
Convert one use of EMPTY_TREE_SHA1_HEX to use empty_tree_oid_hex to
avoid a dependency on a given hash algorithm.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:52 +09:00
brian m. carlson
cb91022c0e builtin/merge: switch tree functions to use object_id
The read_empty and reset_hard functions are static and their callers
have already changed to use struct object_id, so convert them as well.
To avoid dependency on the hash algorithm in use, switch from using
EMPTY_TREE_SHA1_HEX to using empty_tree_oid_hex.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:52 +09:00
brian m. carlson
d41836a0b2 builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo
Convert several uses of EMPTY_TREE_SHA1_BIN to use the_hash_algo
and struct object_id instead.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:52 +09:00
brian m. carlson
f6d27d2468 builtin/receive-pack: avoid hard-coded constants for push certs
Use the GIT_SHA1_RAWSZ and GIT_SHA1_HEXSZ macros instead of hard-coding
the constants 20 and 40.  Switch one use of 20 with a format specifier
for a hex value to use the hex constant instead, as the original appears
to have been a typo.

At this point, avoid converting the hard-coded use of SHA-1 to use
the_hash_algo.  SHA-1, even if not collision resistant, is secure in the
context in which it is used here, and the hash algorithm of the repo
need not match what is used here.  When we adopt a new hash algorithm,
we can simply adopt the new algorithm wholesale here, as the nonce is
opaque and its length and validity are entirely controlled by the
server.  Consequently, defer updating this code until that point.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:51 +09:00
brian m. carlson
5d9e198245 index-pack: abstract away hash function constant
The code for reading certain pack v2 offsets had a hard-coded 5
representing the number of uint32_t words that we needed to skip over.
Specify this value in terms of a value from the_hash_algo.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:51 +09:00
brian m. carlson
6390fe20eb pack-redundant: convert linked lists to use struct object_id
Convert struct llist_item and the rest of the linked list code to use
struct object_id.  Add a use of GIT_MAX_HEXSZ to avoid a dependency on a
hard-coded constant.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:50 +09:00
brian m. carlson
2182abd94b split-index: convert struct split_index to object_id
Convert the base_sha1 member of struct split_index to use struct
object_id and rename it base_oid.  Include cache.h to make the structure
visible.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:50 +09:00
brian m. carlson
00de606332 pack-redundant: abstract away hash algorithm
Instead of using hard-coded instances of the constant 20, use
the_hash_algo to look up the correct constant.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:50 +09:00
brian m. carlson
411791009b pack-objects: abstract away hash algorithm
Instead of using hard-coded instances of the constant 20, use
the_hash_algo to look up the correct constant.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:50 +09:00
brian m. carlson
6862ebbfcb sha1-file: convert freshen functions to object_id
Convert the various functions for freshening objects and
has_loose_object_nonlocal to use struct object_id.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:49 +09:00
brian m. carlson
14c3c80c81 packfile: convert has_sha1_pack to object_id
Convert this function to take a pointer to struct object_id and rename
it has_object_pack for consistency with has_object_file.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:49 +09:00
brian m. carlson
50cd54ef4e format-patch: make cover letters always text/plain
When formatting a series of patches using --attach and --cover-letter,
the cover letter lacks the closing MIME boundary, violating RFC 2046.
Certain clients, such as Thunderbird, discard the message body in such a
case.

Since the cover letter is just one part and sending it as
multipart/mixed is not very useful, always emit it as text/plain,
avoiding the boundary problem altogether.

Reported-by: Patrick Hemmer <git@stormcloud9.net>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 12:55:00 +09:00
Johannes Schindelin
fb40429109 replace: introduce --convert-graft-file
This option is intended to help with the transition away from the
now-deprecated graft file.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 11:12:30 +09:00
Johannes Schindelin
041c98e22d replace: prepare create_graft() for converting graft files wholesale
When converting all grafts in a graft file to replace refs, and one of
them happens to leave the original commit's parents unchanged, we do not
want to error out. Instead, we would like to issue a warning.

Prepare the create_graft() function for such a use case by adding a
`gentle` parameter. If set, we do not return an error when the replace ref
is unchanged, but a mere warning.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 11:12:29 +09:00
Johannes Schindelin
e24e871920 replace: "libify" create_graft() and callees
File this away as yet another patch in the "libification" category.

As with all useful functions, in the next commit we want to use
create_graft() from a higher-level function where it would be
inconvenient if the called function simply die()s: if there is a
problem, we want to let the user know how to proceed, and the callee
simply has no way of knowing what to say.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 11:12:29 +09:00
Thomas Gummerer
f60a7b763f worktree: teach "add" to check out existing branches
Currently 'git worktree add <path>' creates a new branch named after the
basename of the path by default.  If a branch with that name already
exists, the command refuses to do anything, unless the '--force' option
is given.

However we can do a little better than that, and check the branch out if
it is not checked out anywhere else.  This will help users who just want
to check an existing branch out into a new worktree, and save a few
keystrokes.

As the current behaviour is to simply 'die()' when a branch with the name
of the basename of the path already exists, there are no backwards
compatibility worries here.

We will still 'die()' if the branch is checked out in another worktree,
unless the --force flag is passed.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 09:06:34 +09:00
Thomas Gummerer
6427f87186 worktree: factor out dwim_branch function
Factor out a dwim_branch function, which takes care of the dwim'ery in
'git worktree add <path>'.  It's not too much code currently, but we're
adding a new kind of dwim in a subsequent patch, at which point it makes
more sense to have it as a separate function.

Factor it out now to reduce the patch noise in the next patch.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 09:06:34 +09:00
Thomas Gummerer
2c27002a0a worktree: improve message when creating a new worktree
Currently 'git worktree add' produces output like the following:

    Preparing ../foo (identifier foo)
    HEAD is now at 26da330922 <title>

The '../foo' is the path where the worktree is created, which the user
has just given on the command line.  The identifier is an internal
implementation detail, which is not particularly relevant for the user
and indeed isn't mentioned explicitly anywhere in the man page.

Instead of this message, print a message that gives the user a bit more
detail of what exactly 'git worktree' is doing.  There are various dwim
modes which perform some magic under the hood, which should be
helpful to users.  Just from the output of the command it is not always
visible to users what exactly has happened.

Help the users a bit more by modifying the "Preparing ..." message and
adding some additional information of what 'git worktree add' did under
the hood, while not displaying the identifier anymore.

Currently there are several different cases:

  - 'git worktree add -b ...' or 'git worktree add <path>', both of
    which create a new branch, either through the user explicitly
    requesting it, or through 'git worktree add' implicitly creating
    it.  This will end up with the following output:

      Preparing worktree (new branch '<branch>')
      HEAD is now at 26da330922 <title>

  - 'git worktree add -B ...', which may either create a new branch if
    the branch with the given name does not exist yet, or resets an
    existing branch to the current HEAD, or the commit-ish given.
    Depending on which action is taken, we'll end up with the following
    output:

      Preparing worktree (resetting branch '<branch>'; was at caa68db14)
      HEAD is now at 26da330922 <title>

    or:

      Preparing worktree (new branch '<branch>')
      HEAD is now at 26da330922 <title>

  - 'git worktree add --detach' or 'git worktree add <path>
    <commit-ish>', both of which create a new worktree with a detached
    HEAD, for which we will print the following output:

      Preparing worktree (detached HEAD 26da330922)
      HEAD is now at 26da330922 <title>

  - 'git worktree add <path> <local-branch>', which checks out the
    branch and prints the following output:

      Preparing worktree (checking out '<local-branch>')
      HEAD is now at 47007d5 <title>

Additionally currently the "Preparing ..." line is printed to stderr,
while the "HEAD is now at ..." line is printed to stdout by 'git reset
--hard', which is used internally by 'git worktree add'.  Fix this
inconsistency by printing the "Preparing ..." message to stdout as
well.  As "Preparing ..." is not an error, stdout also seems like the
more appropriate output stream.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 09:06:34 +09:00
Thomas Gummerer
d861d34a6e worktree: remove extra members from struct add_opts
There are two members of 'struct add_opts', which are only used inside
the 'add()' function, but being part of 'struct add_opts' they are
needlessly also passed to the 'add_worktree' function.

Make them local to the 'add()' function to make it clearer where they
are used.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-30 09:06:34 +09:00
Johannes Schindelin
d398f2ea00 replace: avoid using die() to indicate a bug
We have the BUG() macro for that purpose.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 12:52:58 +09:00
Johannes Schindelin
fef461ea5d commit: Let the callback of for_each_mergetag return on error
This is yet another patch to be filed under the keyword "libification".

There is one subtle change in behavior here, where a `git log` that has
been asked to show the mergetags would now stop reporting the mergetags
upon the first failure, whereas previously, it would have continued to the
next mergetag, if any.

In practice, that change should not matter, as it is 1) uncommon to
perform octopus merges using multiple tags as merge heads, and 2) when the
user asks to be shown those tags, they really should be there.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 12:52:57 +09:00
Johannes Schindelin
7543f6f444 rebase -i: introduce --rebase-merges=[no-]rebase-cousins
When running `git rebase --rebase-merges` non-interactively with an
ancestor of HEAD as <upstream> (or leaving the todo list unmodified),
we would ideally recreate the exact same commits as before the rebase.

However, if there are commits in the commit range <upstream>.. that do not
have <upstream> as direct ancestor (i.e. if `git log <upstream>..` would
show commits that are omitted by `git log --ancestry-path <upstream>..`),
this is currently not the case: we would turn them into commits that have
<upstream> as direct ancestor.

Let's illustrate that with a diagram:

        C
      /   \
A - B - E - F
  \   /
    D

Currently, after running `git rebase -i --rebase-merges B`, the new branch
structure would be (pay particular attention to the commit `D`):

       --- C' --
      /         \
A - B ------ E' - F'
      \    /
        D'

This is not really preserving the branch topology from before! The
reason is that the commit `D` does not have `B` as ancestor, and
therefore it gets rebased onto `B`.

This is unintuitive behavior. Even worse, when recreating branch
structure, most use cases would appear to want cousins *not* to be
rebased onto the new base commit. For example, Git for Windows (the
heaviest user of the Git garden shears, which served as the blueprint
for --rebase-merges) frequently merges branches from `next` early, and
these branches certainly do *not* want to be rebased. In the example
above, the desired outcome would look like this:

       --- C' --
      /         \
A - B ------ E' - F'
  \        /
   -- D' --

Let's introduce the term "cousins" for such commits ("D" in the
example), and let's not rebase them by default. For hypothetical
use cases where cousins *do* need to be rebased, `git rebase
--rebase=merges=rebase-cousins` needs to be used.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 12:28:43 +09:00
Johannes Schindelin
1131ec9818 pull: accept --rebase=merges to recreate the branch topology
Similar to the `preserve` mode simply passing the `--preserve-merges`
option to the `rebase` command, the `merges` mode simply passes the
`--rebase-merges` option.

This will allow users to conveniently rebase non-trivial commit
topologies when pulling new commits, without flattening them.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 12:28:43 +09:00
Johannes Schindelin
1644c73c6d rebase-helper --make-script: introduce a flag to rebase merges
The sequencer just learned new commands intended to recreate branch
structure (similar in spirit to --preserve-merges, but with a
substantially less-broken design).

Let's allow the rebase--helper to generate todo lists making use of
these commands, triggered by the new --rebase-merges option. For a
commit topology like this (where the HEAD points to C):

	- A - B - C
	    \   /
	      D

the generated todo list would look like this:

	# branch D
	pick 0123 A
	label branch-point
	pick 1234 D
	label D

	reset branch-point
	pick 2345 B
	merge -C 3456 D # C

To keep things simple, we first only implement support for merge commits
with exactly two parents, leaving support for octopus merges to a later
patch series.

All merge-rebasing todo lists start with a hard-coded `label onto` line.
This makes it convenient to refer later on to the revision onto which
everything is rebased, e.g. as starting point for branches other than
the very first one.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 12:28:42 +09:00
Jonathan Nieder
720aaa1a74 packfile: add repository argument to packed_object_info
Add a repository argument to allow callers of packed_object_info to be
more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 10:54:27 +09:00
Stefan Beller
0df8e96566 cache.h: add repository argument to oid_object_info
Add a repository argument to allow the callers of oid_object_info
to be more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Stefan Beller <sbeller@google.com>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 10:54:27 +09:00
Stefan Beller
7ecd869060 cache.h: add repository argument to oid_object_info_extended
Add a repository argument to allow oid_object_info_extended callers
to be more specific about which repository to act on. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

Signed-off-by: Stefan Beller <sbeller@google.com>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-26 10:54:27 +09:00
Junio C Hamano
89e5aa3dff Merge branch 'sb/filenames-with-dashes'
Rename bunch of source files to more consistently use dashes
instead of underscores to connect words.

* sb/filenames-with-dashes:
  replace_object.c: rename to use dash in file name
  sha1_file.c: rename to use dash in file name
  sha1_name.c: rename to use dash in file name
  exec_cmd: rename to use dash in file name
  unicode_width.h: rename to use dash in file name
  write_or_die.c: rename to use dashes in file name
2018-04-25 13:29:05 +09:00
Junio C Hamano
b3d6c48c5f Merge branch 'jk/ref-array-push'
API clean-up aournd ref-filter code.

* jk/ref-array-push:
  ref-filter: factor ref_array pushing into its own function
  ref-filter: make ref_array_item allocation more consistent
  ref-filter: use "struct object_id" consistently
2018-04-25 13:28:59 +09:00
Junio C Hamano
8295f2028f Merge branch 'bw/commit-partial-from-subdirectory-fix'
"cd sub/dir && git commit ../path" ought to record the changes to
the file "sub/path", but this regressed long time ago.

* bw/commit-partial-from-subdirectory-fix:
  commit: allow partial commits with relative paths
2018-04-25 13:28:53 +09:00
Brandon Williams
5e3548ef16 fetch: send server options when using protocol v2
Teach fetch to optionally accept server options by specifying them on
the cmdline via '-o' or '--server-option'.  These server options are
sent to the remote end when performing a fetch communicating using
protocol version 2.

If communicating using a protocol other than v2 the provided options are
ignored and not sent to the remote end.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-24 11:24:40 +09:00
Brandon Williams
ff473221b4 ls-remote: send server options when using protocol v2
Teach ls-remote to optionally accept server options by specifying them
on the cmdline via '-o' or '--server-option'.  These server options are
sent to the remote end when querying for the remote end's refs using
protocol version 2.

If communicating using a protocol other than v2 the provided options are
ignored and not sent to the remote end.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-24 11:24:40 +09:00
Junio C Hamano
bbc39d4020 Merge branch 'bw/protocol-v2' into HEAD
* bw/protocol-v2: (35 commits)
  remote-curl: don't request v2 when pushing
  remote-curl: implement stateless-connect command
  http: eliminate "# service" line when using protocol v2
  http: don't always add Git-Protocol header
  http: allow providing extra headers for http requests
  remote-curl: store the protocol version the server responded with
  remote-curl: create copy of the service name
  pkt-line: add packet_buf_write_len function
  transport-helper: introduce stateless-connect
  transport-helper: refactor process_connect_service
  transport-helper: remove name parameter
  connect: don't request v2 when pushing
  connect: refactor git_connect to only get the protocol version once
  fetch-pack: support shallow requests
  fetch-pack: perform a fetch using v2
  upload-pack: introduce fetch server command
  push: pass ref prefixes when pushing
  fetch: pass ref prefixes when fetching
  ls-remote: pass ref prefixes when requesting a remote's refs
  transport: convert transport_get_remote_refs to take a list of ref prefixes
  ...
2018-04-24 11:24:22 +09:00
Stefan Beller
0dc95a4d8a builtin/blame: add new coloring scheme config
Add a config option that allows selecting the default color scheme for
blame. The command line still takes precedence over the configuration.

It is to be seen, how color.ui will integrate with blame coloring.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-24 11:03:17 +09:00
Stefan Beller
25d5f52901 builtin/blame: highlight recently changed lines
Choose a different color for dates and imitate a 'temperature cool down'
depending upon age.

Originally I had planned to have the temperature cool down dependent on
the age of the project or file for example, as that might scale better,
but that can be added on top of this commit, e.g. instead of giving a
date, you could imagine giving a percentage that would be the linearly
interpolated between now and the beginning of the file.

Similarly to the previous patch, this offers the command line option
'--color-by-age' to enable this mode and the config option
'color.blame.highlightrecent' to select colors. A later patch will offer
a config option to select the default mode.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-24 11:03:15 +09:00
Stefan Beller
cdc2d5f11f builtin/blame: dim uninteresting metadata lines
When using git-blame lots of lines contain redundant information, for
example in hunks that consist of multiple lines, the metadata (commit
name, author, date) are repeated. A reader may not be interested in those,
so offer an option to color the information that is repeated from the
previous line differently. Traditionally, we use CYAN for lines that
are less interesting than others (e.g. hunk header), so go with that.

The command line option '--color-lines' will trigger the coloring of
repeated lines, and the config option 'color.blame.colorLines' is
provided to select the color. Setting the config option doesn't imply
that repeated lines are colored. A later patch will introduce a config
to enable this mode by default.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-24 11:03:13 +09:00
Ryan Dammrose
960786e761 push: colorize errors
This is an attempt to resolve an issue I experience with people that are
new to Git -- especially colleagues in a team setting -- where they miss
that their push to a remote location failed because the failure and
success both return a block of white text.

An example is if I push something to a remote repository and then a
colleague attempts to push to the same remote repository and the push
fails because it requires them to pull first, but they don't notice
because a success and failure both return a block of white text. They
then continue about their business, thinking it has been successfully
pushed.

This patch colorizes the errors and hints (in red and yellow,
respectively) so whenever there is a failure when pushing to a remote
repository that fails, it is more noticeable.

[jes: fixed a couple bugs, added the color.{advice,push,transport}
settings, refactored to use want_color_stderr().]

Signed-off-by: Ryan Dammrose ryandammrose@gmail.com
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-24 10:38:47 +09:00
Taylor Blau
63e2a0f8e9 builtin/config: introduce color type specifier
As of this commit, the canonical way to retreive an ANSI-compatible
color escape sequence from a configuration file is with the
`--get-color` action.

This is to allow Git to "fall back" on a default value for the color
should the given section not exist in the specified configuration(s).

With the addition of `--default`, this is no longer needed since:

  $ git config --default red --type=color core.section

will be have exactly as:

  $ git config --get-color core.section red

For consistency, let's introduce `--type=color` and encourage its use
with `--default` together over `--get-color` alone.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-23 22:52:20 +09:00
Taylor Blau
eeaa24b990 builtin/config: introduce --default
For some use cases, callers of the `git-config(1)` builtin would like to
fallback to default values when the variable asked for does not exist.
In addition, users would like to use existing type specifiers to ensure
that values are parsed correctly when they do exist in the
configuration.

For example, to fetch a value without a type specifier and fallback to
`$fallback`, the following is required:

  $ git config core.foo || echo "$fallback"

This is fine for most values, but can be tricky for difficult-to-express
`$fallback`'s, like ANSI color codes.

This motivates `--get-color`, which is a one-off exception to the normal
type specifier rules wherein a user specifies both the configuration
variable and an optional fallback. Both are formatted according to their
type specifier, which eases the burden on the user to ensure that values
are correctly formatted.

This commit (and those following it in this series) aim to eventually
replace `--get-color` with a consistent alternative. By introducing
`--default`, we allow the `--get-color` action to be promoted to a
`--type=color` type specifier, retaining the "fallback" behavior via the
`--default` flag introduced in this commit.

For example, we aim to replace:

  $ git config --get-color variable [default] [...]

with:

  $ git config --default default --type=color variable [...]

Values filled by `--default` behave exactly as if they were present in
the affected configuration file; they will be parsed by type specifiers
without the knowledge that they are not themselves present in the
configuration.

Specifically, this means that the following will work:

  $ git config --int --default 1M does.not.exist
  1048576

In subsequent commits, we will offer `--type=color`, which (in
conjunction with `--default`) will be sufficient to replace
`--get-color`.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-23 22:51:38 +09:00
Junio C Hamano
8ab5aa4bd8 parseopt: handle malformed --expire arguments more nicely
A few commands that parse --expire=<time> command line option behave
sillily when given nonsense input.  For example

    $ git prune --no-expire
    Segmentation falut
    $ git prune --expire=npw; echo $?
    129

Both come from parse_opt_expiry_date_cb().

The former is because the function is not prepared to see arg==NULL
(for "--no-expire", it is a norm; "--expire" at the end of the
command line could be made to pass NULL, if it is told that the
argument is optional, but we don't so we do not have to worry about
that case).

The latter is because it does not check the value returned from the
underlying parse_expiry_date().

This seems to be a recent regression introduced while we attempted
to avoid spewing the entire usage message when given a correct
option but with an invalid value at 3bb0923f ("parse-options: do not
show usage upon invalid option value", 2018-03-22).  Before that, we
didn't fail silently but showed a full usage help (which arguably is
not all that better).

Also catch this error early when "git gc --prune=<expiration>" is
misspelled by doing a dummy parsing before the main body of "gc"
that is time consuming even begins.  Otherwise, we'd spend time to
pack objects and then later have "git prune" first notice the error.
Aborting "gc" in the middle that way is not harmful but is ugly and
can be avoided.

Helped-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-23 22:36:59 +09:00
Junio C Hamano
96913c9df6 gc: do not upcase error message shown with die()
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-23 22:36:14 +09:00
Martin Ågren
be011bbe00 fast-export: fix regression skipping some merge-commits
7199203937 (object_array: add and use `object_array_pop()`, 2017-09-23)
noted that the pattern `object = array.objects[--array.nr].item` could
be abstracted as `object = object_array_pop(&array)`.

Unfortunately, one of the conversions was horribly wrong. Between
grabbing the last object (i.e., peeking at it) and decreasing the object
count, the original code would sometimes return early. The updated code
on the other hand, will always pop the last element, then maybe do the
early return without doing anything with the object.

The end result is that merge commits where all the parents have still
not been exported will simply be dropped, meaning that they will be
completely missing from the exported data.

Re-add a commit when it is not yet time to handle it. An alternative
that was considered was to peek-then-pop. That carries some risk with it
since the peeking and popping need to act on the same object, in a
concerted fashion.

Add a test that would have caught this.

Reported-by: Isaac Chou <Isaac.Chou@microfocus.com>
Analyzed-by: Isaac Chou <Isaac.Chou@microfocus.com>
Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-21 12:43:40 +09:00
Taylor Blau
fb0dc3bac1 builtin/config.c: support --type=<type> as preferred alias for --<type>
`git config` has long allowed the ability for callers to provide a 'type
specifier', which instructs `git config` to (1) ensure that incoming
values can be interpreted as that type, and (2) that outgoing values are
canonicalized under that type.

In another series, we propose to extend this functionality with
`--type=color` and `--default` to replace `--get-color`.

However, we traditionally use `--color` to mean "colorize this output",
instead of "this value should be treated as a color".

Currently, `git config` does not support this kind of colorization, but
we should be careful to avoid squatting on this option too soon, so that
`git config` can support `--color` (in the traditional sense) in the
future, if that is desired.

In this patch, we support `--type=<int|bool|bool-or-int|...>` in
addition to `--int`, `--bool`, and etc. This allows the aforementioned
upcoming patch to support querying a color value with a default via
`--type=color --default=...`, without squandering `--color`.

We retain the historic behavior of complaining when multiple,
legacy-style `--<type>` flags are given, as well as extend this to
conflicting new-style `--type=<type>` flags. `--int --type=int` (and its
commutative pair) does not complain, but `--bool --type=int` (and its
commutative pair) does.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-19 11:49:19 +09:00
Nguyễn Thái Ngọc Duy
0b5e2ea7cf submodule--helper: don't print null in 'submodule status'
The function compute_rev_name() can return NULL sometimes (e.g. right
after 'submodule init'). The current code makes 'submodule status'
print this:

 19d97bf5af05312267c2e874ee6bcf584d9e9681 sha1collisiondetection ((null))

This ugly 'null' adds no value to the user using this command. More
importantly printf() on some platform can't handle NULL as a string
and will crash instead of printing '(null)'.

Check for this and skip printing this part (the alternative is
printing '(n/a)' or something but I think that is just noise).

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-19 06:24:23 +09:00
Stefan Beller
d228eea514 worktree: accept -f as short for --force for removal
Many commands support a "--force" option, frequently abbreviated as
"-f", however, "git worktree remove"'s hand-rolled OPT_BOOL forgets
to recognize the short form, despite git-worktree.txt documenting
"-f" as supported. Replace OPT_BOOL with OPT__FORCE, which provides
"-f" for free, and makes 'remove' consistent with 'add' option
parsing (which also specifies the PARSE_OPT_NOCOMPLETE flag).

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-18 09:19:05 +09:00
Nguyễn Thái Ngọc Duy
5af050437a pack-objects: show some progress when counting kept objects
We only show progress when there are new objects to be packed. But
when --keep-pack is specified on the base pack, we will exclude most
of objects. This makes 'pack-objects' stay silent for a long time
while the counting phase is going.

Let's show some progress whenever we visit an object instead. The old
"Counting objects" is renamed to "Enumerating objects" and a new
progress "Counting objects" line is added.

This new "Counting objects" line should progress pretty quick when the
system is beefy. But when the system is under pressure, the reading
object header done in this phase could be slow and showing progress is
an improvement over staying silent in the current code.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 13:52:29 +09:00
Nguyễn Thái Ngọc Duy
9806f5a7bf gc --auto: exclude base pack if not enough mem to "repack -ad"
pack-objects could be a big memory hog especially on large repos,
everybody knows that. The suggestion to stick a .keep file on the
giant base pack to avoid this problem is also known for a long time.

Recent patches add an option to do just this, but it has to be either
configured or activated manually. This patch lets `git gc --auto`
activate this mode automatically when it thinks `repack -ad` will use
a lot of memory and start affecting the system due to swapping or
flushing OS cache.

gc --auto decides to do this based on an estimation of pack-objects
memory usage, which is quite accurate at least for the heap part, and
whether that fits in half of system memory (the assumption here is for
desktop environment where there are many other applications running).

This mechanism only kicks in if gc.bigBasePackThreshold is not configured.
If it is, it is assumed that the user already knows what they want.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 13:52:29 +09:00
Nguyễn Thái Ngọc Duy
8fc6776247 gc: handle a corner case in gc.bigPackThreshold
This config allows us to keep <N> packs back if their size is larger
than a limit. But if this N >= gc.autoPackLimit, we may have a
problem. We are supposed to reduce the number of packs after a
threshold because it affects performance.

We could tell the user that they have incompatible gc.bigPackThreshold
and gc.autoPackLimit, but it's kinda hard when 'git gc --auto' runs in
background. Instead let's fall back to the next best stategy: try to
reduce the number of packs anyway, but keep the base pack out. This
reduces the number of packs to two and hopefully won't take up too
much resources to repack (the assumption still is the base pack takes
most resources to handle).

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 13:52:29 +09:00
Nguyễn Thái Ngọc Duy
55dfe13df9 gc: add gc.bigPackThreshold config
The --keep-largest-pack option is not very convenient to use because
you need to tell gc to do this explicitly (and probably on just a few
large repos).

Add a config key that enables this mode when packs larger than a limit
are found. Note that there's a slight behavior difference compared to
--keep-largest-pack: all packs larger than the threshold are kept, not
just the largest one.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 13:52:29 +09:00
Nguyễn Thái Ngọc Duy
ae4e89e549 gc: add --keep-largest-pack option
This adds a new repack mode that combines everything into a secondary
pack, leaving the largest pack alone.

This could help reduce memory pressure. On linux-2.6.git, valgrind
massif reports 1.6GB heap in "pack all" case, and 535MB in "pack
all except the base pack" case. We save roughly 1GB memory by
excluding the base pack.

This should also lower I/O because we don't have to rewrite a giant
pack every time (e.g. for linux-2.6.git that's a 1.4GB pack file)..

PS. The use of string_list here seems overkill, but we'll need it in
the next patch...

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 13:52:29 +09:00
Nguyễn Thái Ngọc Duy
ed7e5fc3a2 repack: add --keep-pack option
We allow to keep existing packs by having companion .keep files. This
is helpful when a pack is permanently kept. In the next patch, git-gc
just wants to keep a pack temporarily, for one pack-objects
run. git-gc can use --keep-pack for this use case.

A note about why the pack_keep field cannot be reused and
pack_keep_in_core has to be added. This is about the case when
--keep-pack is specified together with either --keep-unreachable or
--unpack-unreachable, but --honor-pack-keep is NOT specified.

In this case, we want to exclude objects from the packs specified on
command line, not from ones with .keep files. If only one bit flag is
used, we have to clear pack_keep on pack files with the .keep file.

But we can't make any assumption about unreachable objects in .keep
packs. If "pack_keep" field is false for .keep packs, we could
potentially pull lots of unreachable objects into the new pack, or
unpack them loose. The safer approach is ignore all packs with either
.keep file or --keep-pack.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 13:52:29 +09:00
Nguyễn Thái Ngọc Duy
0aca34e826 pack-objects: shrink delta_size field in struct object_entry
Allowing a delta size of 64 bits is crazy. Shrink this field down to
20 bits with one overflow bit.

If we find an existing delta larger than 1MB, we do not cache
delta_size at all and will get the value from oe_size(), potentially
from disk if it's larger than 4GB.

Note, since DELTA_SIZE() is used in try_delta() code, it must be
thread-safe. Luckily oe_size() does guarantee this so we it is
thread-safe.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:59 +09:00
Nguyễn Thái Ngọc Duy
ac77d0c370 pack-objects: shrink size field in struct object_entry
It's very very rare that an uncompressed object is larger than 4GB
(partly because Git does not handle those large files very well to
begin with). Let's optimize it for the common case where object size
is smaller than this limit.

Shrink size field down to 31 bits and one overflow bit. If the size is
too large, we read it back from disk. As noted in the previous patch,
we need to return the delta size instead of canonical size when the
to-be-reused object entry type is a delta instead of a canonical one.

Add two compare helpers that can take advantage of the overflow
bit (e.g. if the file is 4GB+, chances are it's already larger than
core.bigFileThreshold and there's no point in comparing the actual
value).

Another note about oe_get_size_slow(). This function MUST be thread
safe because SIZE() macro is used inside try_delta() which may run in
parallel. Outside parallel code, no-contention locking should be dirt
cheap (or insignificant compared to i/o access anyway). To exercise
this code, it's best to run the test suite with something like

    make test GIT_TEST_OE_SIZE=4

which forces this code on all objects larger than 3 bytes.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:59 +09:00
Nguyễn Thái Ngọc Duy
27a7d0679f pack-objects: clarify the use of object_entry::size
While this field most of the time contains the canonical object size,
there is one case it does not: when we have found that the base object
of the delta in question is also to be packed, we will very happily
reuse the delta by copying it over instead of regenerating the new
delta.

"size" in this case will record the delta size, not canonical object
size. Later on in write_reuse_object(), we reconstruct the delta
header and "size" is used for this purpose. When this happens, the
"type" field contains a delta type instead of a canonical type.
Highlight this in the code since it could be tricky to see.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:59 +09:00
Nguyễn Thái Ngọc Duy
660b373542 pack-objects: don't check size when the object is bad
sha1_object_info() in check_objects() may fail to locate an object in
the pack and return type OBJ_BAD. In that case, it will likely leave
the "size" field untouched. We delay error handling until later in
prepare_pack() though. Until then, do not touch "size" field.

This field should contain the default value zero, but we can't say
sha1_object_info() cannot damage it. This becomes more important later
when the object size may have to be retrieved back from the
(non-existing) pack.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
0cb3c1427a pack-objects: shrink z_delta_size field in struct object_entry
We only cache deltas when it's smaller than a certain limit. This limit
defaults to 1000 but save its compressed length in a 64-bit field.
Shrink that field down to 20 bits, so you can only cache 1MB deltas.
Larger deltas must be recomputed at when the pack is written down.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
898eba5e63 pack-objects: refer to delta objects by index instead of pointer
These delta pointers always point to elements in the objects[] array
in packing_data struct. We can only hold maximum 4G of those objects
because the array size in nr_objects is uint32_t. We could use
uint32_t indexes to address these elements instead of pointers. On
64-bit architecture (8 bytes per pointer) this would save 4 bytes per
pointer.

Convert these delta pointers to indexes. Since we need to handle NULL
pointers as well, the index is shifted by one [1].

[1] This means we can only index 2^32-2 objects even though nr_objects
    could contain 2^32-1 objects. It should not be a problem in
    practice because when we grow objects[], nr_alloc would probably
    blow up long before nr_objects hits the wall.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
43fa44fa3b pack-objects: move in_pack out of struct object_entry
Instead of using 8 bytes (on 64 bit arch) to store a pointer to a
pack. Use an index instead since the number of packs should be
relatively small.

This limits the number of packs we can handle to 1k. Since we can't be
sure people can never run into the situation where they have more than
1k pack files. Provide a fall back route for it.

If we find out they have too many packs, the new in_pack_by_idx[]
array (which has at most 1k elements) will not be used. Instead we
allocate in_pack[] array that holds nr_objects elements. This is
similar to how the optional in_pack_pos field is handled.

The new simple test is just to make sure the too-many-packs code path
is at least executed. The true test is running

    make test GIT_TEST_FULL_IN_PACK_ARRAY=1

to take advantage of other special case tests.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
06af3bba41 pack-objects: move in_pack_pos out of struct object_entry
This field is only need for pack-bitmap, which is an optional
feature. Move it to a separate array that is only allocated when
pack-bitmap is used (like objects[], it is not freed, since we need it
until the end of the process)

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
b5c0cbd808 pack-objects: use bitfield for object_entry::depth
Because of struct packing from now on we can only handle max depth
4095 (or even lower when new booleans are added in this struct). This
should be ok since long delta chain will cause significant slow down
anyway.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
0c6804ab4e pack-objects: use bitfield for object_entry::dfs_state
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Nguyễn Thái Ngọc Duy
fd9b1baef8 pack-objects: turn type and in_pack_type to bitfields
An extra field type_valid is added to carry the equivalent of OBJ_BAD
in the original "type" field. in_pack_type always contains a valid
type so we only need 3 bits for it.

A note about accepting OBJ_NONE as "valid" type. The function
read_object_list_from_stdin() can pass this value [1] and it
eventually calls create_object_entry() where current code skip setting
"type" field if the incoming type is zero. This does not have any bad
side effects because "type" field should be memset()'d anyway.

But since we also need to set type_valid now, skipping oe_set_type()
leaves type_valid zero/false, which will make oe_type() return
OBJ_BAD, not OBJ_NONE anymore. Apparently we do care about OBJ_NONE in
prepare_pack(). This switch from OBJ_NONE to OBJ_BAD may trigger

    fatal: unable to get type of object ...

Accepting OBJ_NONE [2] does sound wrong, but this is how it is has
been for a very long time and I haven't time to dig in further.

[1] See 5c49c11686 (pack-objects: better check_object() performances -
    2007-04-16)

[2] 21666f1aae (convert object type handling from a string to a number
    - 2007-02-26)

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-16 12:38:58 +09:00
Stefan Beller
1f2e7ceabc replace-object: add repository argument to lookup_replace_object
Add a repository argument to allow callers of lookup_replace_object
to be more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-12 11:38:56 +09:00
Stefan Beller
60ce76d358 refs: add repository argument to for_each_replace_ref
Add a repository argument to allow for_each_replace_ref callers to be
more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-12 11:38:56 +09:00
Stefan Beller
23a3f0cb16 refs: add repository argument to get_main_ref_store
Add a repository argument to allow the get_main_ref_store caller
to be more specific about which repository to handle. This is a small
mechanical change; it doesn't change the implementation to handle
repositories other than the_repository yet.

As with the previous commits, use a macro to catch callers passing a
repository other than the_repository at compile time.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-12 11:38:56 +09:00
Stefan Beller
47f351e9b3 object-store: move lookup_replace_object to replace-object.h
lookup_replace_object is a low-level function that most users of the
object store do not need to use directly.

Move it to replace-object.h to avoid a dependency loop in an upcoming
change to its inline definition that will make use of repository.h.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-12 11:38:56 +09:00
Stefan Beller
fc1395f4a4 sha1_file.c: rename to use dash in file name
This is more consistent with the project style. The majority of Git's
source files use dashes in preference to underscores in their file names.

Signed-off-by: Stefan Beller <sbeller@google.com>
2018-04-11 18:11:00 +09:00
Stefan Beller
d807c4a01d exec_cmd: rename to use dash in file name
This is more consistent with the project style. The majority of Git's
source files use dashes in preference to underscores in their file names.

Signed-off-by: Stefan Beller <sbeller@google.com>
2018-04-11 18:11:00 +09:00
Junio C Hamano
103251a318 Merge branch 'rs/status-with-removed-submodule'
"git submodule status" misbehaved on a submodule that has been
removed from the working tree.

* rs/status-with-removed-submodule:
  submodule: check for NULL return of get_submodule_ref_store()
2018-04-11 13:09:56 +09:00