Commit Graph

7894 Commits

Author SHA1 Message Date
Junio C Hamano
627b826834 Merge branch 'md/list-objects-filter-combo'
The list-objects-filter API (used to create a sparse/lazy clone)
learned to take a combined filter specification.

* md/list-objects-filter-combo:
  list-objects-filter-options: make parser void
  list-objects-filter-options: clean up use of ALLOC_GROW
  list-objects-filter-options: allow mult. --filter
  strbuf: give URL-encoding API a char predicate fn
  list-objects-filter-options: make filter_spec a string_list
  list-objects-filter-options: move error check up
  list-objects-filter: implement composite filters
  list-objects-filter-options: always supply *errbuf
  list-objects-filter: put omits set in filter struct
  list-objects-filter: encapsulate filter components
2019-09-18 11:50:09 -07:00
Junio C Hamano
b9ac6c59b8 Merge branch 'cc/multi-promisor'
Teach the lazy clone machinery that there can be more than one
promisor remote and consult them in order when downloading missing
objects on demand.

* cc/multi-promisor:
  Move core_partial_clone_filter_default to promisor-remote.c
  Move repository_format_partial_clone to promisor-remote.c
  Remove fetch-object.{c,h} in favor of promisor-remote.{c,h}
  remote: add promisor and partial clone config to the doc
  partial-clone: add multiple remotes in the doc
  t0410: test fetching from many promisor remotes
  builtin/fetch: remove unique promisor remote limitation
  promisor-remote: parse remote.*.partialclonefilter
  Use promisor_remote_get_direct() and has_promisor_remote()
  promisor-remote: use repository_format_partial_clone
  promisor-remote: add promisor_remote_reinit()
  promisor-remote: implement promisor_remote_get_direct()
  Add initial support for many promisor remotes
  fetch-object: make functions return an error code
  t0410: remove pipes after git commands
2019-09-18 11:50:09 -07:00
Junio C Hamano
f76bd8c6b1 Merge branch 'js/pre-merge-commit-hook'
A new "pre-merge-commit" hook has been introduced.

* js/pre-merge-commit-hook:
  merge: --no-verify to bypass pre-merge-commit hook
  git-merge: honor pre-merge-commit hook
  merge: do no-verify like commit
  t7503: verify proper hook execution
2019-09-18 11:50:08 -07:00
Junio C Hamano
128666753b Merge branch 'jk/drop-release-pack-memory'
xmalloc() used to have a mechanism to ditch memory and address
space resources as the last resort upon seeing an allocation
failure from the underlying malloc(), which made the code complex
and thread-unsafe with dubious benefit, as major memory resource
users already do limit their uses with various other mechanisms.
It has been simplified away.

* jk/drop-release-pack-memory:
  packfile: drop release_pack_memory()
2019-09-18 11:50:08 -07:00
Junio C Hamano
917a319ea5 Merge branch 'js/rebase-r-strategy'
"git rebase --rebase-merges" learned to drive different merge
strategies and pass strategy specific options to them.

* js/rebase-r-strategy:
  t3427: accelerate this test by using fast-export and fast-import
  rebase -r: do not (re-)generate root commits with `--root` *and* `--onto`
  t3418: test `rebase -r` with merge strategies
  t/lib-rebase: prepare for testing `git rebase --rebase-merges`
  rebase -r: support merge strategies other than `recursive`
  t3427: fix another incorrect assumption
  t3427: accommodate for the `rebase --merge` backend having been replaced
  t3427: fix erroneous assumption
  t3427: condense the unnecessarily repetitive test cases into three
  t3427: move the `filter-branch` invocation into the `setup` case
  t3427: simplify the `setup` test case significantly
  t3427: add a clarifying comment
  rebase: fold git-rebase--common into the -p backend
  sequencer: the `am` and `rebase--interactive` scripts are gone
  .gitignore: there is no longer a built-in `git-rebase--interactive`
  t3400: stop referring to the scripted rebase
  Drop unused git-rebase--am.sh
2019-09-18 11:50:07 -07:00
Junio C Hamano
9437394661 Merge branch 'cb/fetch-set-upstream'
"git fetch" learned "--set-upstream" option to help those who first
clone from their private fork they intend to push to, add the true
upstream via "git remote add" and then "git fetch" from it.

* cb/fetch-set-upstream:
  pull, fetch: add --set-upstream option
2019-09-09 12:26:37 -07:00
Junio C Hamano
d1a251a1fa Merge branch 'en/checkout-mismerge-fix'
Fix a mismerge that happened in 2.22 timeframe.

* en/checkout-mismerge-fix:
  checkout: remove duplicate code
2019-09-09 12:26:36 -07:00
Junio C Hamano
f4f8dfe127 Merge branch 'ds/feature-macros'
A mechanism to affect the default setting for a (related) group of
configuration variables is introduced.

* ds/feature-macros:
  repo-settings: create feature.experimental setting
  repo-settings: create feature.manyFiles setting
  repo-settings: parse core.untrackedCache
  commit-graph: turn on commit-graph by default
  t6501: use 'git gc' in quiet mode
  repo-settings: consolidate some config settings
2019-09-09 12:26:36 -07:00
Junio C Hamano
d4b12b9e07 Merge branch 'sg/worktree-remove-errormsg'
Error message update/clarification.

* sg/worktree-remove-errormsg:
  worktree remove: clarify error message on dirty worktree
2019-08-22 12:34:12 -07:00
Junio C Hamano
6ba06b582b Merge branch 'sg/commit-graph-validate'
The code to write commit-graph over given commit object names has
been made a bit more robust.

* sg/commit-graph-validate:
  commit-graph: error out on invalid commit oids in 'write --stdin-commits'
  commit-graph: turn a group of write-related macro flags into an enum
  t5318-commit-graph: use 'test_expect_code'
2019-08-22 12:34:11 -07:00
Junio C Hamano
072735ea58 Merge branch 'vn/restore-empty-ita-corner-case-fix'
"git checkout" and "git restore" to re-populate the index from a
tree-ish (typically HEAD) did not work correctly for a path that
was removed and then added again with the intent-to-add bit, when
the corresponding working tree file was empty.  This has been
corrected.

* vn/restore-empty-ita-corner-case-fix:
  restore: add test for deleted ita files
  checkout.c: unstage empty deleted ita files
2019-08-22 12:34:11 -07:00
Junio C Hamano
1b01cdbf2e Merge branch 'jk/tree-walk-overflow'
Codepaths to walk tree objects have been audited for integer
overflows and hardened.

* jk/tree-walk-overflow:
  tree-walk: harden make_traverse_path() length computations
  tree-walk: add a strbuf wrapper for make_traverse_path()
  tree-walk: accept a raw length for traverse_path_len()
  tree-walk: use size_t consistently
  tree-walk: drop oid from traverse_info
  setup_traverse_info(): stop copying oid
2019-08-22 12:34:10 -07:00
Junio C Hamano
307179732d Merge branch 'mt/grep-submodules-working-tree'
"git grep --recurse-submodules" that looks at the working tree
files looked at the contents in the index in submodules, instead of
files in the working tree.

* mt/grep-submodules-working-tree:
  grep: fix worktree case in submodules
2019-08-22 12:34:10 -07:00
Corentin BOMPARD
24bc1a1292 pull, fetch: add --set-upstream option
Add the --set-upstream option to git pull/fetch
which lets the user set the upstream configuration
(branch.<current-branch-name>.merge and
branch.<current-branch-name>.remote) for the current branch.

A typical use-case is:

    git clone http://example.com/my-public-fork
    git remote add main http://example.com/project-main-repo
    git pull --set-upstream main master

or, instead of the last line:

    git fetch --set-upstream main master
    git merge # or git rebase

This is mostly equivalent to cloning project-main-repo (which sets
upsteam) and then "git remote add" my-public-fork, but may feel more
natural for people using a hosting system which allows forking from
the web UI.

This functionality is analog to "git push --set-upstream".

Signed-off-by: Corentin BOMPARD <corentin.bompard@etu.univ-lyon1.fr>
Signed-off-by: Nathan BERBEZIER <nathan.berbezier@etu.univ-lyon1.fr>
Signed-off-by: Pablo CHABANNE <pablo.chabanne@etu.univ-lyon1.fr>
Signed-off-by: Matthieu Moy <git@matthieu-moy.fr>
Patch-edited-by: Matthieu Moy <git@matthieu-moy.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-19 13:05:58 -07:00
Elijah Newren
acb7da05ac checkout: remove duplicate code
Both commit a7256debd4 ("checkout.txt: note about losing staged
changes with --merge", 2019-03-19) from nd/checkout-m-doc-update and
commit 6eff409e8a ("checkout: prevent losing staged changes with
--merge", 2019-03-22) from nd/checkout-m were included in git.git
despite the fact that the latter was meant to be v2 of the former.
The merge of these two topics resulted in a redundant chunk of code;
remove it.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-16 09:58:00 -07:00
Derrick Stolee
ad0fb65999 repo-settings: parse core.untrackedCache
The core.untrackedCache config setting is slightly complicated,
so clarify its use and centralize its parsing into the repo
settings.

The default value is "keep" (returned as -1), which persists the
untracked cache if it exists.

If the value is set as "false" (returned as 0), then remove the
untracked cache if it exists.

If the value is set as "true" (returned as 1), then write the
untracked cache and persist it.

Instead of relying on magic values of -1, 0, and 1, split these
options into an enum. This allows the use of "-1" as a
default value. After parsing the config options, if the value is
unset we can initialize it to UNTRACKED_CACHE_KEEP.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-13 13:33:55 -07:00
Derrick Stolee
7211b9e753 repo-settings: consolidate some config settings
There are a few important config settings that are not loaded
during git_default_config. These are instead loaded on-demand.

Centralize these config options to a single scan, and store
all of the values in a repo_settings struct. The values for
each setting are initialized as negative to indicate "unset".

This centralization will be particularly important in a later
change to introduce "meta" config settings that change the
defaults for these config settings.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-13 13:33:54 -07:00
SZEDER Gábor
507e5470a0 worktree remove: clarify error message on dirty worktree
To avoid data loss, 'git worktree remove' refuses to delete a worktree
if it's dirty or contains untracked files.  However, the error message
only mentions that the worktree "is dirty", even if the worktree in
question is in fact clean, but contains untracked files:

  $ git worktree add test-worktree
  Preparing worktree (new branch 'test-worktree')
  HEAD is now at aa53e60 Initial
  $ >test-worktree/untracked-file
  $ git worktree remove test-worktree/
  fatal: 'test-worktree/' is dirty, use --force to delete it
  $ git -C test-worktree/ diff
  $ git -C test-worktree/ diff --cached
  $ # Huh?  Where are those dirty files?!

Clarify this error message to say that the worktree "contains modified
or untracked files".

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-13 13:10:09 -07:00
Jeff King
9827d4c185 packfile: drop release_pack_memory()
Long ago, in 97bfeb34df (Release pack windows before reporting out of
memory., 2006-12-24), we taught xmalloc() and friends to try unmapping
pack windows when malloc() failed. It's unlikely that his helps a lot in
practice, and it has some downsides. First, the downsides:

  1. It makes xmalloc() not thread-safe. We've worked around this in
     pack-objects.c, which installs its own locking version of the
     try_to_free_routine(). But other threaded code doesn't.

  2. It makes the system as a whole harder to reason about. Functions
     which allocate heap memory under the hood may have farther-reaching
     effects than expected.

That might be worth the tradeoff if there's a benefit. But in practice,
it seems unlikely. We're generally dealing with mmap'd files, so the OS
is going to do a much better job at responding to memory pressure by
dropping individual pages (the exception is systems with NO_MMAP, but
even there the OS can probably respond just as well with swapping).

So the only thing we're really freeing is address space. On 64-bit
systems, we have plenty of that to go around. On 32-bit systems, it
could possibly help. But around the same time we made two other changes:
77ccc5bbd1 (Introduce new config option for mmap limit., 2006-12-23) and
60bb8b1453 (Fully activate the sliding window pack access., 2006-12-23).
Together that means that a 32-bit system should have no more than 256MB
total of packed-git mmaps at one time, split between a few 32MB windows.
It's unlikely we have any address space problems since then, but we
don't have any data since the features were all added at the same time.

Likewise, xmmap() will try to free memory. At first glance, it seems
like we'd need this (when we try to mmap a new window, we might need to
close an old one to save address space on a 32-bit system). But we're
saved again by core.packedGitLimit: if we're going to exceed our 256MB
limit, we'll close an existing window before we even call mmap().

So it seems unlikely that this feature is actually doing anything
useful. And while we don't have reports of it harming anything (probably
because it rarely if ever kicks in), it would be nice to simplify the
system overall. This patch drops the whole try_to_free system from
xmalloc(), as well as the manual pack memory release in xmmap().

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-13 12:21:33 -07:00
Michael J Gruber
bc40ce4de6 merge: --no-verify to bypass pre-merge-commit hook
Analogous to commit, introduce a '--no-verify' option which bypasses the
pre-merge-commit hook. The shorthand '-n' is taken by '--no-stat'
already.

[js: * reworded commit message to reflect current state of --no-stat flag
       and new hook name
     * fixed flag documentation to reflect new hook name
     * cleaned up trailing whitespace
     * squashed test changes from the original series' patch 4/4
     * modified tests to follow pattern from this series' patch 1/4
     * added a test case for --no-verify with non-executable hook
     * when testing that the merge hook did not run, make sure we
       actually have a merge to perform (by resetting the "side" branch
       to its original state).

]

Improved-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Michael J Gruber <git@grubix.eu>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-07 12:37:33 -07:00
Michael J Gruber
6098817fd7 git-merge: honor pre-merge-commit hook
git-merge does not honor the pre-commit hook when doing automatic merge
commits, and for compatibility reasons this is going to stay.

Introduce a pre-merge-commit hook which is called for an automatic merge
commit just like pre-commit is called for a non-automatic merge commit
(or any other commit).

[js: * renamed hook from "pre-merge" to "pre-merge-commit"
     * only discard the index if the hook is actually present
     * expanded githooks documentation entry
     * clarified that hook should write messages to stderr
     * squashed test changes from the original series' patch 4/4
     * modified tests to follow new pattern from this series' patch 1/4
     * added a test case for non-executable merge hooks
     * added a test case for failed merges
     * when testing that the merge hook did not run, make sure we
       actually have a merge to perform (by resetting the "side" branch
       to its original state).
     * reworded commit message
]

Improved-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Michael J Gruber <git@grubix.eu>
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-07 12:37:33 -07:00
Michael J Gruber
a1f3dd7eb3 merge: do no-verify like commit
f8b863598c ("builtin/merge: honor commit-msg hook for merges", 2017-09-07)
introduced the no-verify flag to merge for bypassing the commit-msg
hook, though in a different way from the implementation in commit.c.

Change the implementation in merge.c to be the same as in commit.c so
that both do the same in the same way. This also changes the output of
"git merge --help" to be more clear that the hook return code is
respected by default.

[js: * reworded commit message
     * squashed documentation changes from original series' patch 3/4
]

Signed-off-by: Michael J Gruber <git@grubix.eu>
Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-07 12:37:33 -07:00
Jean-Noël Avila
182f59daf0 l10n: reformat some localized strings for v2.23.0
Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-06 12:43:43 -07:00
SZEDER Gábor
7c5c9b9c57 commit-graph: error out on invalid commit oids in 'write --stdin-commits'
While 'git commit-graph write --stdin-commits' expects commit object
ids as input, it accepts and silently skips over any invalid commit
object ids, and still exits with success:

  # nonsense
  $ echo not-a-commit-oid | git commit-graph write --stdin-commits
  $ echo $?
  0
  # sometimes I forgot that refs are not good...
  $ echo HEAD | git commit-graph write --stdin-commits
  $ echo $?
  0
  # valid tree OID, but not a commit OID
  $ git rev-parse HEAD^{tree} | git commit-graph write --stdin-commits
  $ echo $?
  0
  $ ls -l .git/objects/info/commit-graph
  ls: cannot access '.git/objects/info/commit-graph': No such file or directory

Check that all input records are indeed valid commit object ids and
return with error otherwise, the same way '--stdin-packs' handles
invalid input; see e103f7276f (commit-graph: return with errors during
write, 2019-06-12).

Note that it should only return with error when encountering an
invalid commit object id coming from standard input.  However,
'--reachable' uses the same code path to process object ids pointed to
by all refs, and that includes tag object ids as well, which should
still be skipped over.  Therefore add a new flag to 'enum
commit_graph_write_flags' and a corresponding field to 'struct
write_commit_graph_context', so we can differentiate between those two
cases.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Acked-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-05 14:33:39 -07:00
SZEDER Gábor
39d8831856 commit-graph: turn a group of write-related macro flags into an enum
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Acked-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-05 14:31:24 -07:00
Junio C Hamano
9b274e2887 Merge branch 'jc/log-mailmap-flip-defaults'
Hotfix for making "git log" use the mailmap by default.

* jc/log-mailmap-flip-defaults:
  log: really flip the --mailmap default
  log: flip the --mailmap default unconditionally
2019-08-02 13:12:02 -07:00
Varun Naik
ecd72042de checkout.c: unstage empty deleted ita files
It is possible to delete a committed file from the index and then add it
as intent-to-add. After `git checkout HEAD <pathspec>`, the file should
be identical in the index and HEAD. The command already works correctly
if the file has contents in HEAD. This patch provides the desired
behavior even when the file is empty in HEAD.

`git checkout HEAD <pathspec>` calls tree.c:read_tree_1(), with fn
pointing to checkout.c:update_some(). update_some() creates a new cache
entry but discards it when its mode and oid match those of the old
entry. A cache entry for an ita file and a cache entry for an empty file
have the same oid. Therefore, an empty deleted ita file previously
passed both of these checks, and the new entry was discarded, so the
file remained unchanged in the index. After this fix, if the file is
marked as ita in the cache, then we avoid discarding the new entry and
add the new entry to the cache instead.

This change should not affect newly added ita files. For those, inside
tree.c:read_tree_1(), tree_entry_interesting() returns
entry_not_interesting, so fn is never called.

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Varun Naik <vcnaik94@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-02 10:28:10 -07:00
Junio C Hamano
f3eda90ffc log: really flip the --mailmap default
Update the docs, test the interaction between the new default,
configuration and command line option, in addition to actually
flipping the default.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-02 09:55:03 -07:00
Jeff King
c43ab06259 tree-walk: add a strbuf wrapper for make_traverse_path()
All but one of the callers of make_traverse_path() allocate a new heap
buffer to store the path. Let's give them an easy way to write to a
strbuf, which saves them from computing the length themselves (which is
especially tricky when they want to add to the path). It will also make
it easier for us to change the make_traverse_path() interface in a
future patch to improve its bounds-checking.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-01 13:06:52 -07:00
Jeff King
b3b3cbcbf2 tree-walk: accept a raw length for traverse_path_len()
We take a "struct name_entry", but only care about the length of the
path name. Let's just take that length directly, making it easier to use
the function from callers that sometimes do not have a name_entry at
all.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-01 13:06:52 -07:00
Junio C Hamano
51cf315870 Merge branch 'jk/repack-silence-auto-bitmap-warning'
Squelch unneeded and misleading warnings from "repack" when the
command attempts to generate pack bitmaps without explicitly asked
for by the user.

* jk/repack-silence-auto-bitmap-warning:
  repack: simplify handling of auto-bitmaps and .keep files
  repack: silence warnings when auto-enabled bitmaps cannot be built
  t7700: clean up .keep file in bitmap-writing test
2019-08-01 09:10:50 -07:00
Junio C Hamano
7ed20f596b log: flip the --mailmap default unconditionally
It turns out that being cautious to warn against upcoming default
change was an unpopular behaviour, and such a care can easily be
defeated by distro packagers to render it ineffective anyway.

Just flip the default, with only a mention in the release notes.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-08-01 08:46:31 -07:00
Junio C Hamano
0bdce88004 Merge branch 'jk/no-system-includes-in-dot-c'
Compilation fix.

* jk/no-system-includes-in-dot-c:
  wt-status.h: drop stdio.h include
  verify-tag: drop signal.h include
2019-07-31 14:38:56 -07:00
Jeff King
9055384710 tree-walk: drop oid from traverse_info
As the previous commit shows, the presence of an oid in each level of
the traverse_info is confusing and ultimately not necessary. Let's drop
it to make it clear that it will not always be set (as well as convince
us that it's unused, and let the compiler catch any merges with other
branches that do add new uses).

Since the oid is part of name_entry, we'll actually stop embedding a
name_entry entirely, and instead just separately hold the pathname, its
length, and the mode.

This makes the resulting code slightly more verbose as we have to pass
those elements around individually. But it also makes it more clear what
each code path is going to use (and in most of the paths, we really only
care about the pathname itself).

A few of these conversions are noisier than they need to be, as they
also take the opportunity to rename "len" to "namelen" for clarity
(especially where we also have "pathlen" or "ce_len" alongside).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 13:34:25 -07:00
Jeff King
947208b725 setup_traverse_info(): stop copying oid
We assume that if setup_traverse_info() is passed a non-empty "base"
string, that string is pointing into a tree object and we can read the
object oid by skipping past the trailing NUL.

As it turns out, this is not true for either of the two calls, and we
may end up reading garbage bytes:

  1. In git-merge-tree, our base string is either empty (in which case
     we'd never run this code), or it comes from our traverse_path()
     helper. The latter overallocates a buffer by the_hash_algo->rawsz
     bytes, but then fills it with only make_traverse_path(), leaving
     those extra bytes uninitialized (but part of a legitimate heap
     buffer).

  2. In unpack_trees(), we pass o->prefix, which is some arbitrary
     string from the caller. In "git read-tree --prefix=foo", for
     instance, it will point to the command-line parameter, and we'll
     read 20 bytes past the end of the string.

Interestingly, tools like ASan do not detect (2) because the process
argv is part of a big pre-allocated buffer. So we're reading trash, but
it's trash that's probably part of the next argument, or the
environment.

You can convince it to fail by putting something like this at the
beginning of common-main.c's main() function:

  {
	int i;
	for (i = 0; i < argc; i++)
		argv[i] = xstrdup_or_null(argv[i]);
  }

That puts the arguments into their own heap buffers, so running:

  make SANITIZE=address test

will find problems when "read-tree --prefix" is used (e.g., in t3030).

Doubly interesting, even with the hackery above, this does not fail
prior to ea82b2a085 (tree-walk: store object_id in a separate member,
2019-01-15). That commit switched setup_traverse_info() to actually
copying the hash, rather than simply pointing to it. That pointer was
always pointing to garbage memory, but that commit started actually
dereferencing the bytes, which is what triggers ASan.

That also implies that nobody actually cares about reading these oid
bytes anyway (or at least no path covered by our tests). And manual
inspection of the code backs that up (I'll follow this patch with some
cleanups that show definitively this is the case, but they're quite
invasive, so it's worth doing this fix on its own).

So let's drop the bogus hashcpy(), along with the confusing oversizing
in merge-tree.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 13:30:58 -07:00
Jeff King
7ff024e7b3 repack: simplify handling of auto-bitmaps and .keep files
Commit 7328482253 (repack: disable bitmaps-by-default if .keep files
exist, 2019-06-29) taught repack to prefer disabling bitmaps to
duplicating objects (unless bitmaps were asked for explicitly).

But there's an easier way to do this: if we keep passing the
--honor-pack-keep flag to pack-objects when auto-enabling bitmaps, then
pack-objects already makes the same decision (it will disable bitmaps
rather than duplicate). Better still, pack-objects can actually decide
to do so based not just on the presence of a .keep file, but on whether
that .keep file actually impacts the new pack we're making (so if we're
racing with a push or fetch, for example, their temporary .keep file
will not block us from generating bitmaps if they haven't yet updated
their refs).

And because repack uses the --write-bitmap-index-quiet flag, we don't
have to worry about pack-objects generating confusing warnings when it
does see a .keep file. We can confirm this by tweaking the .keep test to
check repack's stderr.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 13:26:25 -07:00
Jeff King
25575015ca repack: silence warnings when auto-enabled bitmaps cannot be built
Depending on various config options, a full repack may not be able to
build a reachability bitmap index (e.g., if pack.packSizeLimit forces us
to write multiple packs). In these cases pack-objects may write a
warning to stderr.

Since 36eba0323d (repack: enable bitmaps by default on bare repos,
2019-03-14), we may generate these warnings even when the user did not
explicitly ask for bitmaps. This has two downsides:

  - it can be confusing, if they don't know what bitmaps are

  - a daemonized auto-gc will write this to its log file, and the
    presence of the warning may suppress further auto-gc (until
    gc.logExpiry has elapsed)

Let's have repack communicate to pack-objects that the choice to turn on
bitmaps was not made explicitly by the user, which in turn allows
pack-objects to suppress these warnings.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 13:15:51 -07:00
Johannes Schindelin
e1fac531ea rebase -r: do not (re-)generate root commits with --root *and* --onto
When rebasing a complete commit history onto a given commit, it is
pretty obvious that the root commits should be rebased on top of said
given commit.

To test this, let's kill two birds with one stone and add a test case to
t3427-rebase-subtree.sh that not only demonstrates that this works, but
also that `git rebase -r` works with merge strategies now.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 12:24:07 -07:00
Johannes Schindelin
e145d99347 rebase -r: support merge strategies other than recursive
We already support merge strategies in the sequencer, but only for
`pick` commands.

With this commit, we now also support them in `merge` commands. The
approach is simple: if any merge strategy option is specified, or if any
merge strategy other than `recursive` is specified, we simply spawn the
`git merge` command. Otherwise, we handle the merge in-process just as
before.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 12:24:07 -07:00
Johannes Schindelin
5efed0ecf9 rebase: fold git-rebase--common into the -p backend
The only remaining scripted part of `git rebase` is the
`--preserve-merges` backend. Meaning: there is little reason to keep the
"library of common rebase functions" as a separate file.

While moving the functions to `git-rebase--preserve-merges.sh`, we also
drop the `move_to_original_branch` function that is no longer used.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 12:24:06 -07:00
Johannes Schindelin
d5b581f228 Drop unused git-rebase--am.sh
Since 21853626ea (built-in rebase: call `git am` directly, 2019-01-18),
the built-in rebase already uses the built-in `git am` directly.

Now that d03ebd411c (rebase: remove the rebase.useBuiltin setting,
2019-03-18) even removed the scripted rebase, there is no longer any
user of `git-rebase--am.sh`, so let's just remove it.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-31 12:24:06 -07:00
Matheus Tavares
6a289d45c0 grep: fix worktree case in submodules
Running git-grep with --recurse-submodules results in a cached grep for
the submodules even when --cached is not used. This makes all
modifications in submodules' tracked files be always ignored when
grepping. Solve that making git-grep respect the cached option when
invoking grep_cache() inside grep_submodule(). Also, add tests to
ensure that the desired behavior is performed.

Reported-by: Daniel Zaoui <jackdanielz@eyomi.org>
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-30 13:29:54 -07:00
Junio C Hamano
38dac334d7 Merge branch 'js/rebase-cleanup'
A few leftover cleanup to "git rebase" in C.

* js/rebase-cleanup:
  git: mark cmd_rebase as requiring a worktree
  rebase: fix white-space
2019-07-29 12:39:14 -07:00
Junio C Hamano
7011ce12b8 Merge branch 'fc/fetch-with-import-fix' into maint
Code restructuring during 2.20 period broke fetching tags via
"import" based transports.

* fc/fetch-with-import-fix:
  fetch: fix regression with transport helpers
  fetch: make the code more understandable
  fetch: trivial cleanup
  t5801 (remote-helpers): add test to fetch tags
  t5801 (remote-helpers): cleanup refspec stuff
2019-07-29 12:38:23 -07:00
Junio C Hamano
dea6737bb7 Merge branch 'ds/close-object-store' into maint
The commit-graph file is now part of the "files that the runtime
may keep open file descriptors on, all of which would need to be
closed when done with the object store", and the file descriptor to
an existing commit-graph file now is closed before "gc" finalizes a
new instance to replace it.

* ds/close-object-store:
  packfile: rename close_all_packs to close_object_store
  packfile: close commit-graph in close_all_packs
  commit-graph: use raw_object_store when closing
  commit-graph: extract write_commit_graph_file()
  commit-graph: extract copy_oids_to_commits()
  commit-graph: extract count_distinct_commits()
  commit-graph: extract fill_oids_from_all_packs()
  commit-graph: extract fill_oids_from_commit_hex()
  commit-graph: extract fill_oids_from_packs()
  commit-graph: create write_commit_graph_context
  commit-graph: remove Future Work section
  commit-graph: collapse parameters into flags
  commit-graph: return with errors during write
  commit-graph: fix the_repository reference
2019-07-29 12:38:22 -07:00
Junio C Hamano
0324b6f035 Merge branch 'rs/avoid-overflow-in-midpoint-computation' into maint
Code clean-up to avoid signed integer overlaps during binary search.

* rs/avoid-overflow-in-midpoint-computation:
  cleanup: fix possible overflow errors in binary search, part 2
2019-07-29 12:38:21 -07:00
Junio C Hamano
0100103d8e Merge branch 'jk/trailers-use-config' into maint
"git interpret-trailers" always treated '#' as the comment
character, regardless of core.commentChar setting, which has been
corrected.

* jk/trailers-use-config:
  interpret-trailers: load default config
2019-07-29 12:38:21 -07:00
Junio C Hamano
05ed24dc51 Merge branch 'tg/stash-ref-by-index-fix' into maint
"git stash show 23" used to work, but no more after getting
rewritten in C; this regression has been corrected.

* tg/stash-ref-by-index-fix:
  stash: fix show referencing stash index
2019-07-29 12:38:20 -07:00
Junio C Hamano
649cae69bc Merge branch 'pw/rebase-abort-clean-rewritten' into maint
"git rebase --abort" used to leave refs/rewritten/ when concluding
"git rebase -r", which has been corrected.

* pw/rebase-abort-clean-rewritten:
  rebase --abort/--quit: cleanup refs/rewritten
  sequencer: return errors from sequencer_remove_state()
  rebase: warn if state directory cannot be removed
  rebase: fix a memory leak
2019-07-29 12:38:20 -07:00
Junio C Hamano
e59150199c Merge branch 'jk/delta-islands-progress-fix' into maint
The codepath to compute delta islands used to spew progress output
without giving the callers any way to squelch it, which has been
fixed.

* jk/delta-islands-progress-fix:
  delta-islands: respect progress flag
2019-07-29 12:38:19 -07:00