Commit Graph

4576 Commits

Author SHA1 Message Date
Nguyễn Thái Ngọc Duy
58142c09a4 worktree: add "lock" command
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-08 15:31:04 -07:00
Nguyễn Thái Ngọc Duy
0409e0b6dc worktree: simplify prefixing paths
This also makes slash conversion always happen on Windows (a side effect
of prefix_filename). Which is a good thing.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-24 13:19:23 -07:00
Nguyễn Thái Ngọc Duy
ef23c347cf worktree: avoid 0{40}, too many zeroes, hard to read
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-24 13:19:22 -07:00
Nguyễn Thái Ngọc Duy
afb9e30b2c worktree.c: use is_dot_or_dotdot()
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-24 13:19:22 -07:00
Nguyễn Thái Ngọc Duy
7b722d906b git-worktree.txt: keep subcommand listing in alphabetical order
This is probably not the best order. But it makes it no-brainer to know
where to insert new commands. At some point we might want to reorder at
least the synopsis part again, grouping commonly use subcommands together.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-24 13:19:22 -07:00
Nguyễn Thái Ngọc Duy
14ace5b77b branch: do not rename a branch under bisect or rebase
The branch name in that case could be saved in rebase's head_name or
bisect's BISECT_START files. Ideally we should try to update them as
well. But it's trickier (*). Let's play safe and see if the user
complains about inconveniences before doing that.

(*) If we do it, bisect and rebase need to provide an API to rename
branches. We can't do it in worktree.c or builtin/branch.c because
when other people change rebase/bisect code, they may not be aware of
this code and accidentally break it (e.g. rename the branch file, or
refer to the branch in new files). It's a lot more work.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-22 14:09:39 -07:00
Nguyễn Thái Ngọc Duy
8d9fdd7087 worktree.c: check whether branch is rebased in another worktree
This function find_shared_symref() is used in a couple places:

1) in builtin/branch.c: it's used to detect if a branch is checked out
   elsewhere and refuse to delete the branch.

2) in builtin/notes.c: it's used to detect if a note is being merged in
   another worktree

3) in branch.c, the function die_if_checked_out() is actually used by
   "git checkout" and "git worktree add" to see if a branch is already
   checked out elsewhere and refuse the operation.

In cases 1 and 3, if a rebase is ongoing, "HEAD" will be in detached
mode, find_shared_symref() fails to detect it and declares "no branch is
checked out here", which is not really what we want.

This patch tightens the test. If the given symref is "HEAD", we try to
detect if rebase is ongoing. If so return the branch being rebased. This
makes checkout and branch delete operations safer because you can't
checkout a branch being rebased in another place, or delete it.

Special case for checkout. If the current branch is being rebased,
git-rebase.sh may use "git checkout" to abort and return back to the
original branch. The updated test in find_shared_symref() will prevent
that and "git rebase --abort" will fail as a result.
find_shared_symref() and die_if_checked_out() have to learn a new
option ignore_current_worktree to loosen the test a bit.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-22 14:09:38 -07:00
Nguyễn Thái Ngọc Duy
d3b9ac07eb worktree.c: make find_shared_symref() return struct worktree *
This gives the caller more information and they can answer things like,
"is it the main worktree" or "is it the current worktree". The latter
question is needed for the "checkout a rebase branch" case later.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-22 14:09:37 -07:00
Junio C Hamano
f5cc612916 Merge branch 'jk/branch-shortening-funny-symrefs'
A change back in version 2.7 to "git branch" broke display of a
symbolic ref in a non-standard place in the refs/ hierarchy (we
expect symbolic refs to appear in refs/remotes/*/HEAD to point at
the primary branch the remote has, and as .git/HEAD to point at the
branch we locally checked out).

* jk/branch-shortening-funny-symrefs:
  branch: fix shortening of non-remote symrefs
2016-04-18 10:49:14 -07:00
Junio C Hamano
741a6942eb Merge branch 'ky/branch-m-worktree'
When "git worktree" feature is in use, "git branch -m" renamed a
branch that is checked out in another worktree without adjusting
the HEAD symbolic ref for the worktree.

* ky/branch-m-worktree:
  set_worktree_head_symref(): fix error message
  branch -m: update all per-worktree HEADs
  refs: add a new function set_worktree_head_symref
2016-04-18 10:48:11 -07:00
Junio C Hamano
6680016e9d Merge branch 'tb/blame-force-read-cache-to-workaround-safe-crlf'
When running "git blame $path" with unnormalized data in the index
for the path, the data in the working tree was blamed, even though
"git add" would not have changed what is already in the index, due
to "safe crlf" that disables the line-end conversion.  It has been
corrected.

* tb/blame-force-read-cache-to-workaround-safe-crlf:
  correct blame for files commited with CRLF
2016-04-13 14:12:41 -07:00
Junio C Hamano
cafef3d7ad Merge branch 'lt/pretty-expand-tabs'
When "git log" shows the log message indented by 4-spaces, the
remainder of a line after a HT does not align in the way the author
originally intended.  The command now expands tabs by default in
such a case, and allows the users to override it with a new option,
'--no-expand-tabs'.

* lt/pretty-expand-tabs:
  pretty: test --expand-tabs
  pretty: allow tweaking tabwidth in --expand-tabs
  pretty: enable --expand-tabs by default for selected pretty formats
  pretty: expand tabs in indented logs to make things line up properly
2016-04-13 14:12:36 -07:00
Junio C Hamano
7c137bb531 Merge branch 'mj/pull-rebase-autostash'
"git pull --rebase" learned "--[no-]autostash" option, so that
the rebase.autostash configuration variable set to true can be
overridden from the command line.

* mj/pull-rebase-autostash:
  t5520: test --[no-]autostash with pull.rebase=true
  t5520: reduce commom lines of code
  t5520: factor out common "failing autostash" code
  t5520: factor out common "successful autostash" code
  t5520: use better test to check stderr output
  t5520: ensure consistent test conditions
  t5520: use consistent capitalization in test titles
  pull --rebase: add --[no-]autostash flag
  git-pull.c: introduce git_pull_config()
2016-04-13 14:12:36 -07:00
Junio C Hamano
5b3b015999 Merge branch 'cc/apply'
Minor code clean-up.

* cc/apply:
  builtin/apply: free patch when parse_chunk() fails
  builtin/apply: handle parse_binary() failure
  apply: remove unused call to free() in gitdiff_{old,new}name()
  builtin/apply: get rid of useless 'name' variable
2016-04-13 14:12:34 -07:00
Junio C Hamano
fc452aeac2 Merge branch 'sb/misc-cleanups'
Assorted minor clean-ups.

* sb/misc-cleanups:
  credential-cache, send_request: close fd when done
  bundle: don't leak an fd in case of early return
  abbrev_sha1_in_line: don't leak memory
  notes: don't leak memory in git_config_get_notes_strategy
2016-04-13 14:12:34 -07:00
Junio C Hamano
5250af49f0 Merge branch 'sk/send-pack-all-fix'
"git send-pack --all <there>" was broken when its command line
option parsing was written in the 2.6 timeframe.

* sk/send-pack-all-fix:
  git-send-pack: fix --all option when used with directory
2016-04-13 14:12:33 -07:00
Junio C Hamano
4fca4e37db Merge branch 'ky/branch-d-worktree'
When "git worktree" feature is in use, "git branch -d" allowed
deletion of a branch that is checked out in another worktree

* ky/branch-d-worktree:
  branch -d: refuse deleting a branch which is currently checked out
2016-04-13 14:12:30 -07:00
Junio C Hamano
0d8683c552 Merge branch 'rz/worktree-no-checkout'
"git worktree add" can be given "--no-checkout" option to only
create an empty worktree without checking out the files.

* rz/worktree-no-checkout:
  worktree: add: introduce --checkout option
2016-04-13 14:12:30 -07:00
Junio C Hamano
907c416534 Merge branch 'jk/check-repository-format'
The repository set-up sequence has been streamlined (the biggest
change is that there is no longer git_config_early()), so that we
do not attempt to look into refs/* when we know we do not have a
Git repository.

* jk/check-repository-format:
  verify_repository_format: mark messages for translation
  setup: drop repository_format_version global
  setup: unify repository version callbacks
  init: use setup.c's repo version verification
  setup: refactor repo format reading and verification
  config: drop git_config_early
  check_repository_format_gently: stop using git_config_early
  lazily load core.sharedrepository
  wrap shared_repository global in get/set accessors
  setup: document check_repository_format()
2016-04-13 14:12:28 -07:00
Junio C Hamano
11cfcc579a Merge branch 'nd/apply-report-skip'
"git apply -v" learned to report paths in the patch that were
skipped via --include/--exclude mechanism or being outside the
current working directory.

* nd/apply-report-skip:
  apply: report patch skipping in verbose mode
2016-04-08 14:29:12 -07:00
Junio C Hamano
d04aa7ec47 Merge branch 'jc/merge-refuse-new-root'
"git merge" used to allow merging two branches that have no common
base by default, which led to a brand new history of an existing
project created and then get pulled by an unsuspecting maintainer,
which allowed an unnecessary parallel history merged into the
existing project.  The command has been taught not to allow this by
default, with an escape hatch "--allow-unrelated-histories" option
to be used in a rare event that merges histories of two projects
that started their lives independently.

* jc/merge-refuse-new-root:
  merge: refuse to create too cool a merge by default
2016-04-08 14:29:11 -07:00
Junio C Hamano
a2595f05c7 Merge branch 'la/tag-force-signing-annotated-tags'
"git tag" can create an annotated tag without explicitly given an
"-a" (or "-s") option (i.e. when a tag message is given).  A new
configuration variable, tag.forceSignAnnotated, can be used to tell
the command to create signed tag in such a situation.

* la/tag-force-signing-annotated-tags:
  tag: add the option to force signing of annotated tags
2016-04-06 11:39:13 -07:00
Junio C Hamano
01e1d54418 Merge branch 'jk/submodule-c-credential'
"git -c credential.<var>=<value> submodule" can now be used to
propagate configuration variables related to credential helper
down to the submodules.

* jk/submodule-c-credential:
  git_config_push_parameter: handle empty GIT_CONFIG_PARAMETERS
  git: submodule honor -c credential.* from command line
  quote: implement sq_quotef()
  submodule: fix segmentation fault in submodule--helper clone
  submodule: fix submodule--helper clone usage
  submodule: check argc count for git submodule--helper clone
  submodule: don't pass empty string arguments to submodule--helper clone
2016-04-06 11:39:12 -07:00
Junio C Hamano
aad627e3c0 Merge branch 'jv/merge-nothing-into-void'
"git merge FETCH_HEAD" dereferenced NULL pointer when merging
nothing into an unborn history (which is arguably unusual usage,
which perhaps was the reason why nobody noticed it).

* jv/merge-nothing-into-void:
  merge: fix NULL pointer dereference when merging nothing into void
2016-04-06 11:39:11 -07:00
Junio C Hamano
a6822e4172 Merge branch 'ss/commit-squash-msg'
When "git merge --squash" stopped due to conflict, the concluding
"git commit" failed to read in the SQUASH_MSG that shows the log
messages from all the squashed commits.

* ss/commit-squash-msg:
  commit: do not lose SQUASH_MSG contents
2016-04-06 11:39:10 -07:00
Junio C Hamano
bdebbeb334 Merge branch 'sb/submodule-parallel-update'
A major part of "git submodule update" has been ported to C to take
advantage of the recently added framework to run download tasks in
parallel.

* sb/submodule-parallel-update:
  clone: allow an explicit argument for parallel submodule clones
  submodule update: expose parallelism to the user
  submodule helper: remove double 'fatal: ' prefix
  git submodule update: have a dedicated helper for cloning
  run_processes_parallel: rename parameters for the callbacks
  run_processes_parallel: treat output of children as byte array
  submodule update: direct error message to stderr
  fetching submodules: respect `submodule.fetchJobs` config option
  submodule-config: drop check against NULL
  submodule-config: keep update strategy around
2016-04-06 11:39:01 -07:00
Junio C Hamano
77e075124a Merge branch 'ss/receive-pack-parse-options'
The command line argument parser for "receive-pack" has been
rewritten to use parse-options.

* ss/receive-pack-parse-options:
  builtin/receive-pack.c: use parse_options API
2016-04-06 11:38:59 -07:00
Torsten Bögershausen
a08feb8ef0 correct blame for files commited with CRLF
git blame reports lines as not "Not Committed Yet" when they have
CRLF in the index, CRLF in the worktree and core.autocrlf is true.

Since commit c4805393 (autocrlf: Make it work also for un-normalized
repositories, 2010-05-12), files that have CRLF in the index are not
normalized at commit when core.autocrl is set.

Add a call to read_cache() early in fake_working_tree_commit(),
before calling convert_to_git().

Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-05 13:55:30 -07:00
Jeff King
95c38fb0ed branch: fix shortening of non-remote symrefs
Commit aedcb7d (branch.c: use 'ref-filter' APIs, 2015-09-23)
adjusted the symref-printing code to look like this:

    if (item->symref) {
	    skip_prefix(item->symref, "refs/remotes/", &desc);
	    strbuf_addf(&out, " -> %s", desc);
    }

This has three bugs in it:

  1. It always skips past "refs/remotes/", instead of
     skipping past the prefix associated with the branch we
     are showing (so commonly we see "refs/remotes/" for the
     refs/remotes/origin/HEAD symref, but the previous code
     would skip "refs/heads/" when showing a symref it found
     in refs/heads/.

  2. If skip_prefix() does not match, it leaves "desc"
     untouched, and we show whatever happened to be in it
     (which is the refname from a call to skip_prefix()
     earlier in the function).

  3. If we do match with skip_prefix(), we stomp on the
     "desc" variable, which is later passed to
     add_verbose_info(). We probably want to retain the
     original refname there (though it likely doesn't matter
     in practice, since after all, one points to the other).

The fix to match the original code is fairly easy: record
the prefix to strip based on item->kind, and use it here.
However, since we already have a local variable named "prefix",
let's give the two prefixes verbose names so we don't
confuse them.

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-04 23:35:05 -07:00
Kazuki Yamaguchi
70999e9cec branch -m: update all per-worktree HEADs
When renaming a branch, currently only the HEAD of current working tree
is updated, but it must update HEADs of all working trees which point at
the old branch.

This is the current behavior, /path/to/wt's HEAD is not updated:

  % git worktree list
  /path/to     2c3c5f2 [master]
  /path/to/wt  2c3c5f2 [oldname]
  % git branch -m master master2
  % git worktree list
  /path/to     2c3c5f2 [master2]
  /path/to/wt  2c3c5f2 [oldname]
  % git branch -m oldname newname
  % git worktree list
  /path/to     2c3c5f2 [master2]
  /path/to/wt  0000000 [oldname]

This patch fixes this issue by updating all relevant worktree HEADs
when renaming a branch.

Signed-off-by: Kazuki Yamaguchi <k@rhe.jp>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-04 12:57:22 -07:00
Junio C Hamano
05bf1cdccd Merge branch 'jk/startup-info'
The startup_info data, which records if we are working inside a
repository (among other things), are now uniformly available to Git
subcommand implementations, and Git avoids attempting to touch
references when we are not in a repository.

* jk/startup-info:
  use setup_git_directory() in test-* programs
  grep: turn off gitlink detection for --no-index
  mailmap: do not resolve blobs in a non-repository
  remote: don't resolve HEAD in non-repository
  setup: set startup_info->have_repository more reliably
  setup: make startup_info available everywhere
2016-04-03 10:29:36 -07:00
Junio C Hamano
3583bf594d Merge branch 'jc/index-pack'
Code clean-up.

* jc/index-pack:
  index-pack: add a helper function to derive .idx/.keep filename
2016-04-03 10:29:31 -07:00
Junio C Hamano
9081cffd1e Merge branch 'gf/fetch-pack-direct-object-fetch'
Fetching of history by naming a commit object name directly didn't
work across remote-curl transport.

* gf/fetch-pack-direct-object-fetch:
  fetch-pack: update the documentation for "<refs>..." arguments
  fetch-pack: fix object_id of exact sha1
2016-04-03 10:29:29 -07:00
Junio C Hamano
d4a22303ab Merge branch 'jc/maint-index-pack-keep'
"git index-pack --keep[=<msg>] pack-$name.pack" simply did not work.

* jc/maint-index-pack-keep:
  index-pack: correct --keep[=<msg>]
2016-04-03 10:29:29 -07:00
Junio C Hamano
fbebb5cd07 Merge branch 'jk/rev-parse-local-env-vars'
The "--local-env-vars" and "--resolve-git-dir" options of "git
rev-parse" failed to work outside a repository when the command's
option parsing was rewritten in 1.8.5 era.

* jk/rev-parse-local-env-vars:
  rev-parse: let some options run outside repository
  t1515: add tests for rev-parse out-of-repo helpers
2016-04-03 10:29:27 -07:00
Junio C Hamano
c832cef8aa Merge branch 'jk/config-get-urlmatch'
"git config --get-urlmatch", unlike other variants of the "git
config --get" family, did not signal error with its exit status
when there was no matching configuration.

* jk/config-get-urlmatch:
  Documentation/git-config: fix --get-all description
  Documentation/git-config: use bulleted list for exit codes
  config: fail if --get-urlmatch finds no value
2016-04-03 10:29:26 -07:00
Junio C Hamano
5d2a30d7d8 Merge branch 'mm/diff-renames-default'
The end-user facing Porcelain level commands like "diff" and "log"
now enables the rename detection by default.

* mm/diff-renames-default:
  diff: activate diff.renames by default
  log: introduce init_log_defaults()
  t: add tests for diff.renames (true/false/unset)
  t4001-diff-rename: wrap file creations in a test
  Documentation/diff-config: fix description of diff.renames
2016-04-03 10:29:22 -07:00
Stefan Beller
344b548475 notes: don't leak memory in git_config_get_notes_strategy
This function asks for the value of a configuration and after
using the value does not have to retain ownership of it.
git_config_get_string_const() however is a function to get a
copy of the value, but we forget to free it before we return.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-01 10:31:42 -07:00
Christian Couder
7a6a44c2dc builtin/apply: free patch when parse_chunk() fails
When parse_chunk() fails it can return -1, for example
when find_header() doesn't find a patch header.

In this case it's better in apply_patch() to free the
"struct patch" that we just allocated instead of
leaking it.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-01 10:21:55 -07:00
Christian Couder
484e776158 builtin/apply: handle parse_binary() failure
In parse_binary() there is:

	forward = parse_binary_hunk(&buffer, &size, &status, &used);
	if (!forward && !status)
		/* there has to be one hunk (forward hunk) */
		return error(_("unrecognized binary patch at line %d"), linenr-1);

so parse_binary() can return -1, because that's what error() returns.

Also parse_binary_hunk() sets "status" to -1 in case of error and
parse_binary() does "if (status) return status;".

In this case parse_chunk() should not add -1 to the patchsize it computes.
It is better for future libification efforts to make it just return -1.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-01 10:21:19 -07:00
Stanislav Kolotinskiy
c6777563cd git-send-pack: fix --all option when used with directory
When using git send-pack with --all option
and a target repository specification ([<host>:]<directory>),
usage message is being displayed instead of performing
the actual transmission.

The reason for this issue is that destination and refspecs are being set
in the same conditional and are populated from argv. When a target
repository is passed, refspecs is being populated as well with its value.
This makes the check for refspecs not being NULL to always return true,
which, in conjunction with the check for --all or --mirror options,
is always true as well and returns usage message instead of proceeding.

This ensures that send-pack will stop execution only when --all
or --mirror switch is used in conjunction with any refspecs passed.

Signed-off-by: Stanislav Kolotinskiy <stanislav@assembla.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-31 14:58:26 -07:00
Junio C Hamano
0893eec85f pretty: enable --expand-tabs by default for selected pretty formats
"git log --pretty={medium,full,fuller}" and "git log" by default
prepend 4 spaces to the log message, so it makes sense to enable
the new "expand-tabs" facility by default for these formats.
Add --no-expand-tabs option to override the new default.

The change alone breaks a test in t4201 that runs "git shortlog"
on the output from "git log", and expects that the output from
"git log" does not do such a tab expansion.  Adjust the test to
explicitly disable expand-tabs with --no-expand-tabs.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-30 12:39:29 -07:00
Kazuki Yamaguchi
f292244c04 branch -d: refuse deleting a branch which is currently checked out
When a branch is checked out by current working tree, deleting the
branch is forbidden. However when the branch is checked out only by
other working trees, deleting incorrectly succeeds.
Use find_shared_symref() to check if the branch is in use, not just
comparing with the current working tree's HEAD.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Kazuki Yamaguchi <k@rhe.jp>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-29 13:05:53 -07:00
Ray Zhang
ef2a0ac9a0 worktree: add: introduce --checkout option
By adding this option which defaults to true, we can use the
corresponding --no-checkout to make some customizations before
the checkout, like sparse checkout, etc.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Ray Zhang <zhanglei002@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-29 11:12:36 -07:00
Junio C Hamano
2a4c8c36a7 Merge branch 'sb/submodule-module-list-pathspec-fix'
A fix for a small regression in "module_list" helper that was
rewritten in C (also applies to 2.7.x).

* sb/submodule-module-list-pathspec-fix:
  submodule: fix regression for deinit without submodules
2016-03-24 12:27:13 -07:00
Nguyễn Thái Ngọc Duy
3f5794493c apply: report patch skipping in verbose mode
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-24 10:18:31 -07:00
Junio C Hamano
e379fdf34f merge: refuse to create too cool a merge by default
While it makes sense to allow merging unrelated histories of two
projects that started independently into one, in the way "gitk" was
merged to "git" itself aka "the coolest merge ever", such a merge is
still an unusual event.	 Worse, if somebody creates an independent
history by starting from a tarball of an established project and
sends a pull request to the original project, "git merge" however
happily creates such a merge without any sign of something unusual
is happening.

Teach "git merge" to refuse to create such a merge by default,
unless the user passes a new "--allow-unrelated-histories" option to
tell it that the user is aware that two unrelated projects are
merged.

Because such a "two project merge" is a rare event, a configuration
option to always allow such a merge is not added.

We could add the same option to "git pull" and have it passed
through to underlying "git merge".  I do not have a fundamental
opposition against such a feature, but this commit does not do so
and instead leaves it as low-hanging fruit for others, because such
a "two project merge" would be done after fetching the other project
into some location in the working tree of an existing project and
making sure how well they fit together, it is sufficient to allow a
local merge without such an option pass-through from "git pull" to
"git merge".  Many tests that are updated by this patch does the
pass-through manually by turning:

	git pull something

into its equivalent:

	git fetch something &&
	git merge --allow-unrelated-histories FETCH_HEAD

If somebody is inclined to add such an option, updated tests in this
change need to be adjusted back to:

	git pull --allow-unrelated-histories something

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-23 12:04:48 -07:00
Junio C Hamano
b84e65d409 merge: fix NULL pointer dereference when merging nothing into void
When we are on an unborn branch and merging only one foreign parent,
we allow "git merge" to fast-forward to that foreign parent commit.

This codepath incorrectly attempted to dereference the list of
parents that the merge is going to record even when the list is
empty.  It must refuse to operate instead when there is no parent.

All other codepaths make sure the list is not empty before they
dereference it, and are safe.

Reported-by: Jose Ivan B. Vilarouca Filho
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-23 10:12:10 -07:00
Stefan Beller
84ba959bbd submodule: fix regression for deinit without submodules
Per Cederqvist wrote:
> It used to be possible to run
>
>    git submodule deinit -f .
>
> to remove any submodules, no matter how many submodules you had.  That
> is no longer possible in projects that don't have any submodules at
> all.  The command will fail with:
>
>     error: pathspec '.' did not match any file(s) known to git.

This regression was introduced in 74703a1e4d (submodule: rewrite
`module_list` shell function in C, 2015-09-02), as we changed the
order of checking in new module listing to first check whether it is
a gitlin before feeding it to match_pathspec().  It used to be that
a pathspec that does not match any path were diagnosed as an error,
but the new code complains for a pathspec that does not match any
submodule path.

Arguably the new behaviour may give us a better diagnosis, but that
is inconsistent with the suggestion "deinit" gives, and also this
was an unintended accident.  The new behaviour hopefully can be
redesigned and implemented better in future releases, but for now,
switch these two checks to restore the same behavior as before.  In
an empty repository, giving the pathspec '.' will still get the same
"did not match" error, but that is the same bug we had before 1.7.0.

Reported-by: Per Cederqvist <cederp@opera.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-22 19:26:43 -07:00
Laurent Arnoud
61c2fe0c29 tag: add the option to force signing of annotated tags
The `tag.forcesignannotated` configuration variable makes "git tag"
that would implicitly create an annotated tag to instead create a
signed tag.  For example

	$ git tag -m "This is a message" tag-with-message
	$ git tag -F message-file tag-with-message

would create a signed tag if the configuration variable is in
effect.  To override this from the command line, the user can
explicitly ask for an annotated tag, like so:

	$ git tag -a -m "This is a message" tag-with-message
	$ git tag -a -F message-file tag-with-message

Creation of a light-weight tag, i.e.

	$ git tag lightweight

is not affected.

Signed-off-by: Laurent Arnoud <laurent@spkdev.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-22 15:13:40 -07:00