Commit Graph

12697 Commits

Author SHA1 Message Date
Jeff King
8486b84f0e t5600: modernize style
This is an old script which could use some updating before
we add to it:

  - use the standard line-breaking:

      test_expect_success 'title' '
              body
      '

  - run all code inside test_expect blocks to catch
    unexpected failures in setup steps

  - use "test_commit -C" instead of manually entering
    sub-repo

  - use test_when_finished for cleanup steps

  - test_path_is_* as appropriate

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-03 13:33:03 -08:00
Jeff King
a4c4efd251 t5600: fix outdated comment about unborn HEAD
Back when this test was written, git-clone could not handle
a repository without any commits. These days it works fine,
and this comment is out of date.

At first glance it seems like we could just drop this code
entirely now, but it's necessary for the final test, which
was added later. That test corrupts the repository by
temporarily removing its objects, which means we need to
have some objects to move.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-03 13:33:02 -08:00
Junio C Hamano
ce7320901f Merge branch 'tz/redirect-fix' into maint
A few scripts (both in production and tests) incorrectly redirected
their error output.  These have been corrected.

* tz/redirect-fix:
  rebase: fix stderr redirect in apply_autostash()
  t/lib-gpg: fix gpgconf stderr redirect to /dev/null
2017-12-06 09:09:04 -08:00
Junio C Hamano
0cfcb1695f Merge branch 'tz/notes-error-to-stderr' into maint
"git notes" sent its error message to its standard output stream,
which was corrected.

* tz/notes-error-to-stderr:
  notes: send "Automatic notes merge failed" messages to stderr
2017-12-06 09:09:04 -08:00
Junio C Hamano
2ace172f95 Merge branch 'sb/test-cherry-pick-submodule-getting-in-a-way' into maint
The three-way merge performed by "git cherry-pick" was confused
when a new submodule was added in the meantime, which has been
fixed (or "papered over").

* sb/test-cherry-pick-submodule-getting-in-a-way:
  merge-recursive: handle addition of submodule on our side of history
  t/3512: demonstrate unrelated submodule/file conflict as cherry-pick failure
2017-12-06 09:09:03 -08:00
Junio C Hamano
43240cb731 Merge branch 'rs/apply-inaccurate-eof-with-incomplete-line' into maint
"git apply --inaccurate-eof" when used with "--ignore-space-change"
triggered an internal sanity check, which has been fixed.

* rs/apply-inaccurate-eof-with-incomplete-line:
  apply: update line lengths for --inaccurate-eof
2017-12-06 09:09:03 -08:00
Junio C Hamano
3cc60ecdda Merge branch 'ew/rebase-mboxrd' into maint
When "git rebase" prepared an mailbox of changes and fed it to "git
am" to replay them, it was confused when a stray "From " happened
to be in the log message of one of the replayed changes.  This has
been corrected.

* ew/rebase-mboxrd:
  rebase: use mboxrd format to avoid split errors
2017-12-06 09:09:01 -08:00
Junio C Hamano
02abc6be8e Merge branch 'mh/avoid-rewriting-packed-refs' into maint
Recent update to the refs infrastructure implementation started
rewriting packed-refs file more often than before; this has been
optimized again for most trivial cases.

* mh/avoid-rewriting-packed-refs:
  files-backend: don't rewrite the `packed-refs` file unnecessarily
  t1409: check that `packed-refs` is not rewritten unnecessarily
2017-12-06 09:08:50 -08:00
Junio C Hamano
01e0c53c73 Merge branch 'cb/t4201-robustify' into maint
A test update.

* cb/t4201-robustify:
  t4201: make use of abbreviation in the test more robust
2017-11-21 14:05:33 +09:00
Junio C Hamano
b2a276830f Merge branch 'tz/fsf-address-update' into maint
Replace the mailing address of FSF to a URL, as FSF prefers.

* tz/fsf-address-update:
  Replace Free Software Foundation address in license notices
  Replace Free Software Foundation address in license notices
2017-11-21 14:05:32 +09:00
Junio C Hamano
b77b96e29b Merge branch 'sr/wrapper-quote-filenames' into maint
Some error messages did not quote filenames shown in it, which have
been fixed.

* sr/wrapper-quote-filenames:
  wrapper.c: consistently quote filenames in error messages
2017-11-21 14:05:29 +09:00
Junio C Hamano
6baa11dc2a Merge branch 'bw/rebase-i-ignored-submodule-fix' into maint
"git rebase -i" recently started misbehaving when a submodule that
is configured with 'submodule.<name>.ignore' is dirty; this has
been corrected.

* bw/rebase-i-ignored-submodule-fix:
  wt-status: actually ignore submodules when requested
2017-11-21 14:05:29 +09:00
Eric Wong
ae3b2b04bb rebase: use mboxrd format to avoid split errors
The mboxrd format allows the use of embedded "From " lines in
commit messages without being misinterpreted by mailsplit

Reported-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-18 12:30:16 +09:00
René Scharfe
4855de1233 apply: update line lengths for --inaccurate-eof
Some diff implementations don't report missing newlines at the end of
files.  Applying such a patch can cause a newline character to be
added inadvertently.  The option --inaccurate-eof of git apply can be
used to remove trailing newlines if needed.

apply_one_fragment() cuts it off from the buffers for preimage and
postimage.  Before it does, it builds an array with the lengths of each
line for both.  Make sure to update the length of the last line in
these line info structures as well to keep them consistent with their
respective buffer.

Without this fix the added test fails; git apply dies and reports:

   fatal: BUG: caller miscounted postlen: asked 1, orig = 1, used = 2

That sanity check is only called if whitespace changes are ignored.

Reported-by: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-17 10:42:08 +09:00
Elijah Newren
c641ca6707 merge-recursive: handle addition of submodule on our side of history
The code for a newly added path assumed that the path was a normal file,
and thus checked for there being a directory still being in the way of
the file.  Note that since unpack_trees() does path-in-the-way checks
already, the only way for there to be a directory in the way at this
point in the code, is if there is some kind of D/F conflict in the merge.

For a submodule addition on HEAD's side of history, the submodule would
have already been present.  This means that we do expect there to be a
directory present but should not consider it to be "in the way"; instead,
it's the expected submodule.  So, when there's a submodule addition from
HEAD's side, don't bother checking the working copy for a directory in
the way.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-15 12:42:34 +09:00
Junio C Hamano
74ef46558e Merge branch 'js/mingw-redirect-std-handles' into maint
MinGW updates.

* js/mingw-redirect-std-handles:
  mingw: document the standard handle redirection
  mingw: optionally redirect stderr/stdout via the same handle
  mingw: add experimental feature to redirect standard handles
2017-11-15 12:05:03 +09:00
Junio C Hamano
558d8568df Merge branch 'js/wincred-empty-cred' into maint
MinGW updates.

* js/wincred-empty-cred:
  wincred: handle empty username/password correctly
  t0302: check helper can handle empty credentials
2017-11-15 12:05:03 +09:00
Junio C Hamano
934e330c9d Merge branch 'ad/5580-unc-tests-on-cygwin' into maint
UNC paths are also relevant in Cygwin builds and they are now
tested just like Mingw builds.

* ad/5580-unc-tests-on-cygwin:
  t5580: add Cygwin support
2017-11-15 12:05:00 +09:00
Junio C Hamano
ea3321992b Merge branch 'tb/complete-checkout' into maint
Command line completion (in contrib/) update.

* tb/complete-checkout:
  completion: add remaining flags to checkout
2017-11-15 12:04:58 +09:00
Junio C Hamano
3be9ac7e56 Merge branch 'jc/check-ref-format-oor' into maint
"git check-ref-format --branch @{-1}" bit a "BUG()" when run
outside a repository for obvious reasons; clarify the documentation
and make sure we do not even try to expand the at-mark magic in
such a case, but still call the validation logic for branch names.

* jc/check-ref-format-oor:
  check-ref-format doc: --branch validates and expands <branch>
  check-ref-format --branch: strip refs/heads/ using skip_prefix
  check-ref-format --branch: do not expand @{...} outside repository
2017-11-15 12:04:57 +09:00
Junio C Hamano
2e138796d8 Merge branch 'jc/t5601-copy-workaround' into maint
A (possibly flakey) test fix.

* jc/t5601-copy-workaround:
  t5601: rm the target file of cp that could still be executing
2017-11-15 12:04:56 +09:00
Junio C Hamano
adfc49e60b Merge branch 'jk/rebase-i-exec-gitdir-fix' into maint
A recent regression in "git rebase -i" that broke execution of git
commands from subdirectories via "exec" insn has been fixed.

* jk/rebase-i-exec-gitdir-fix:
  sequencer: pass absolute GIT_DIR to exec commands
2017-11-15 12:04:56 +09:00
Junio C Hamano
21deee3cab Merge branch 'js/submodule-in-excluded' into maint
"git status --ignored -u" did not stop at a working tree of a
separate project that is embedded in an ignored directory and
listed files in that other project, instead of just showing the
directory itself as ignored.

* js/submodule-in-excluded:
  status: do not get confused by submodules in excluded directories
2017-11-15 12:04:54 +09:00
Junio C Hamano
9fbcb51ec5 Merge branch 'jk/misc-resolve-ref-unsafe-fixes' into maint
Some codepaths did not check for errors when asking what branch the
HEAD points at, which have been fixed.

* jk/misc-resolve-ref-unsafe-fixes:
  worktree: handle broken symrefs in find_shared_symref()
  log: handle broken HEAD in decoration check
  remote: handle broken symrefs
  test-ref-store: avoid passing NULL to printf
2017-11-15 12:04:52 +09:00
Junio C Hamano
fd506238f0 Merge branch 'jk/diff-color-moved-fix' into maint
The experimental "color moved lines differently in diff output"
feature was buggy around "ignore whitespace changes" edges, whihch
has been corrected.

* jk/diff-color-moved-fix:
  diff: handle NULs in get_string_hash()
  diff: fix whitespace-skipping with --color-moved
  t4015: test the output of "diff --color-moved -b"
  t4015: check "negative" case for "-w --color-moved"
  t4015: refactor --color-moved whitespace test
2017-11-15 12:04:51 +09:00
Junio C Hamano
e18b1df299 Merge branch 'kd/auto-col-with-pager-fix' into maint
"auto" as a value for the columnar output configuration ought to
judge "is the output consumed by humans?" with the same criteria as
"auto" for coloured output configuration, i.e. either the standard
output stream is going to tty, or a pager is in use.  We forgot the
latter, which has been fixed.

* kd/auto-col-with-pager-fix:
  column: do not include pager.c
  column: show auto columns when pager is active
2017-11-15 12:04:50 +09:00
Todd Zullinger
89b9e31dd5 notes: send "Automatic notes merge failed" messages to stderr
All other error messages from notes use stderr.  Do the same when
alerting users of an unresolved notes merge.

Fix the output redirection in t3310 and t3320 as well.  Previously, the
tests directed output to a file, but stderr was either not captured or
not sent to the file due to the order of the redirection operators.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Acked-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-15 10:23:31 +09:00
Todd Zullinger
4c180f60a4 t/lib-gpg: fix gpgconf stderr redirect to /dev/null
In 29ff1f8f74 (t: lib-gpg: flush gpg agent on startup, 2017-07-20), a
call to gpgconf was added to kill the gpg-agent.  The intention was to
ignore all output from the call, but the order of the redirection needs
to be switched to ensure that both stdout and stderr are redirected to
/dev/null.  Without this, gpgconf from gnupg-2.0 releases would output
'gpgconf: invalid option "--kill"' each time it was called.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-14 11:51:35 +09:00
Charles Bailey
5555a2aa4b t4201: make use of abbreviation in the test more robust
The test for '--abbrev' in t4201-shortlog.sh assumes that the commits
generated in the test can always be uniquely abbreviated to 5 hex digits
but this is not always the case. If you were unlucky and happened to run
the test at (say) Thu Jun 22 03:04:49 2017 +0000, you would find that
the first commit generated would collide with a tree object created
later in the same test.

This can be simulated in the version of t4201-shortlog.sh prior to this
commit by setting GIT_COMMITTER_DATE and GIT_AUTHOR_DATE to 1498100689
after sourcing test-lib.sh.

Change the test to test --abbrev=35 instead of --abbrev=5 to almost
completely avoid the possibility of a partial collision and add a call
to test_tick in the setup to make the test repeatable (the latter alone
is sufficient to make it robust enough).

Signed-off-by: Charles Bailey <cbailey32@bloomberg.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-13 12:48:00 +09:00
Stefan Beller
89c4ee4e74 t/3512: demonstrate unrelated submodule/file conflict as cherry-pick failure
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-12 14:47:45 +09:00
Todd Zullinger
484257925f Replace Free Software Foundation address in license notices
The mailing address for the FSF has changed over the years.  Rather than
updating the address across all files, refer readers to gnu.org, as the
GNU GPL documentation now suggests for license notices.  The mailing
address is retained in the full license files (COPYING and LGPL-2.1).

The old address is still present in t/diff-lib/COPYING.  This is
intentional, as the file is used in tests and the contents are not
expected to change.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-09 13:21:21 +09:00
Brandon Williams
c6d8ccf3a2 wt-status: actually ignore submodules when requested
Since ff6f1f564 (submodule-config: lazy-load a repository's .gitmodules
file, 2017-08-03) rebase interactive fails if there are any submodules
with unstaged changes which have been configured with a value for
'submodule.<name>.ignore' in the repository's config.

This is due to how configured values of 'submodule.<name>.ignore' are
handled in addition to a change in how the submodule config is loaded.
When the diff machinery hits a submodule (gitlink as well as a
corresponding entry in the submodule subsystem) it will read the value
of 'submodule.<name>.ignore' stored in the repository's config and if
the config is present it will clear the 'IGNORE_SUBMODULES' (which is
the flag explicitly requested by rebase interactive),
'IGNORE_UNTRACKED_IN_SUBMODULES', and 'IGNORE_DIRTY_SUBMODULES' diff
flags and then set one of them based on the configured value.

Historically this wasn't a problem because the submodule subsystem
wasn't initialized because the .gitmodules file wasn't explicitly loaded
by the rebase interactive command.  So when the diff machinery hit a
submodule it would skip over reading any configured values of
'submodule.<name>.ignore'.

In order to preserve the behavior of submodules being ignored by rebase
interactive, also set the 'OVERRIDE_SUBMODULE_CONFIG' diff flag when
submodules are requested to be ignored when checking for unstaged
changes.

Reported-by: Orgad Shaneh <orgads@gmail.com>
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-07 11:20:55 +09:00
Simon Ruderich
0a288d1ee9 wrapper.c: consistently quote filenames in error messages
All other error messages in the file use quotes around the file name.

This change removes two translations as "could not write to '%s'" and
"could not close '%s'" are already translated and these two are the only
occurrences without quotes.

Signed-off-by: Simon Ruderich <simon@ruderich.org>
[jc: adjusted tests I noticed were broken by the change]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-06 11:53:14 +09:00
Johannes Schindelin
1a172e4ac1 mingw: optionally redirect stderr/stdout via the same handle
The "2>&1" notation in Powershell and in Unix shells implies that stderr
is redirected to the same handle into which stdout is already written.

Let's use this special value to allow the same trick with
GIT_REDIRECT_STDERR and GIT_REDIRECT_STDOUT: if the former's value is
`2>&1`, then stderr will simply be written to the same handle as stdout.

The functionality was suggested by Jeff Hostetler.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-02 11:19:43 +09:00
Johannes Schindelin
3f944424ac mingw: add experimental feature to redirect standard handles
Particularly when calling Git from applications, such as Visual Studio's
Team Explorer, it is important that stdin/stdout/stderr are closed
properly. However, when spawning processes on Windows, those handles
must be marked as inheritable if we want to use them, but that flag is a
global flag and may very well be used by other spawned processes which
then do not know to close those handles.

Let's introduce a set of environment variables (GIT_REDIRECT_STDIN and
friends) that specify paths to files, or even better, named pipes (which
are similar to Unix sockets) and that are used by the spawned Git
process.  This helps work around above-mentioned issue: those named
pipes will be opened in a non-inheritable way upon startup, and no
handles are passed around (and therefore no inherited handles need to be
closed by any spawned child).

This feature shipped with Git for Windows (marked as experimental) since
v2.11.0(2), so it has seen some serious testing in the meantime.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-02 11:19:41 +09:00
Jacob Keller
09d7b6c6fa sequencer: pass absolute GIT_DIR to exec commands
When we replaced the old shell script based interactive rebase in
commmit 18633e1a22 ("rebase -i: use the rebase--helper builtin",
2017-02-09) we introduced a regression of functionality in that the
GIT_DIR would be sent to the environment of the exec command as-is.

This generally meant that it would be passed as "GIT_DIR=.git", which
causes problems for any exec command that wants to run git commands in
a subdirectory.

This isn't a very large regression, since it is not that likely that the
exec command will run a git command, and even less likely that it will
need to do so in a subdir. This regression was discovered by a build
system which uses git-describe to find the current version of the build
system, and happened to do so from the src/ sub directory of the
project.

Fix this by passing in the absolute path of the git directory into the
child environment.

Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-02 10:53:23 +09:00
Jakub Bereżański
3c90bda688 t0302: check helper can handle empty credentials
Make sure the helper does not crash when blank username and password is
provided. If the helper can save such credentials, it should be able to
read them back.

Signed-off-by: Jakub Bereżański <kuba@berezanscy.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-01 13:46:39 +09:00
Adam Dinwoodie
f21d60b429 t5580: add Cygwin support
t5580 tests that specifying Windows UNC paths works with Git.  Cygwin
supports UNC paths, albeit only using forward slashes, not backslashes,
so run the compatible tests on Cygwin as well as MinGW.

The only complication is Cygwin's `pwd`, which returns a *nix-style
path, and that's not suitable for calculating the UNC path to the
current directory.  Instead use Cygwin's `cygpath` utility to get the
Windows-style path.

Signed-off-by: Adam Dinwoodie <adam@dinwoodie.org>
Reviewed-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-01 10:44:55 +09:00
Michael Haggerty
7c6bd25c7d files-backend: don't rewrite the packed-refs file unnecessarily
Even when we are deleting references, we needn't overwrite the
`packed-refs` file if the references that we are deleting only exist
as loose references. Implement this optimization as follows:

* Add a function `is_packed_transaction_needed()`, which checks
  whether a given packed-refs transaction actually needs to be carried
  out (i.e., it returns false if the transaction obviously wouldn't
  have any effect). This function must be called while holding the
  `packed-refs` lock to avoid races.

* Change `files_transaction_prepare()` to check whether the
  packed-refs transaction is actually needed. If not, squelch it, but
  continue holding the `packed-refs` lock until the end of the
  transaction to avoid races.

This fixes a mild regression caused by dc39e09942 (files_ref_store:
use a transaction to update packed refs, 2017-09-08). Before that
commit, unnecessary rewrites of `packed-refs` were suppressed by
`repack_without_refs()`. But the transaction-based writing introduced
by that commit didn't perform that optimization.

Note that the pre-dc39e09942 code still had to *read* the whole
`packed-refs` file to determine that the rewrite could be skipped, so
the performance for the cases that the write could be elided was
`O(N)` in the number of packed references both before and after
dc39e09942. But after that commit the constant factor increased.

This commit reimplements the optimization of eliding unnecessary
`packed-refs` rewrites. That, plus the fact that since
cfa2e29c34 (packed_ref_store: get rid of the `ref_cache` entirely,
2017-03-17) we don't necessarily have to read the whole `packed-refs`
file at all, means that deletes of one or a few loose references can
now be done with `O(n lg N)` effort, where `n` is the number of loose
references being deleted and `N` is the total number of packed
references.

This commit fixes two tests in t1409.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-30 09:45:15 +09:00
Michael Haggerty
cf79bd9f4c t1409: check that packed-refs is not rewritten unnecessarily
There is no need to rewrite the `packed-refs` file except for the case
that we are deleting a reference that has a packed version. Verify
that `packed-refs` is not rewritten when it shouldn't be.

In fact, two of these tests fail:

* A new (empty) `packed-refs` file is created when deleting any loose
  reference and no `packed-refs` file previously existed.

* The `packed-refs` file is rewritten unnecessarily when deleting a
  loose reference that has no packed counterpart.

Both problems will be fixed in the next commit.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-27 10:12:42 +09:00
Junio C Hamano
4e40fb302e Merge branch 'mh/ref-locking-fix'
Transactions to update multiple references that involves a deletion
was quite broken in an error codepath and did not abort everything
correctly.

* mh/ref-locking-fix:
  files_transaction_prepare(): fix handling of ref lock failure
  t1404: add a bunch of tests of D/F conflicts
2017-10-26 12:29:23 +09:00
Johannes Schindelin
fadb4820c4 status: do not get confused by submodules in excluded directories
We meticulously pass the `exclude` flag to the `treat_directory()`
function so that we can indicate that files in it are excluded rather
than untracked when recursing.

But we did not yet treat submodules the same way.

Because of that, `git status --ignored --untracked` with a submodule
`submodule` in a gitignored `tracked/` would show the submodule in the
"Untracked files" section, e.g.

	On branch master
	Untracked files:
	  (use "git add <file>..." to include in what will be committed)

		tracked/submodule/

	Ignored files:
	  (use "git add -f <file>..." to include in what will be committed)

		tracked/submodule/initial.t

Instead, we would want it to show the submodule in the "Ignored files"
section:

	On branch master
	Ignored files:
	  (use "git add -f <file>..." to include in what will be committed)

		tracked/submodule/

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-26 11:29:06 +09:00
Thomas Braun
6357d9d004 completion: add remaining flags to checkout
In the commits 1fc458d9 (builtin/checkout: add --recurse-submodules
switch, 2017-03-14), 08d595dc (checkout: add --ignore-skip-worktree-bits
in sparse checkout mode, 2013-04-13) and 32669671 (checkout: introduce
--detach synonym for "git checkout foo^{commit}", 2011-02-08) checkout
gained new flags but the completion was not updated, although these flags
are useful completions. Add them.

The flags --force and --ignore-other-worktrees are not added as they are
potentially dangerous.

The flags --progress and --no-progress are only useful for scripting and are
therefore also not included.

Signed-off-by: Thomas Braun <thomas.braun@virtuell-zuhause.de>
Reviewed-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-25 15:12:46 +09:00
Michael Haggerty
da5267f1b6 files_transaction_prepare(): fix handling of ref lock failure
Since dc39e09942 (files_ref_store: use a transaction to update packed
refs, 2017-09-08), failure to lock a reference has been handled
incorrectly by `files_transaction_prepare()`. If
`lock_ref_for_update()` fails in the lock-acquisition loop of that
function, it sets `ret` then breaks out of that loop. Prior to
dc39e09942, that was OK, because the only thing following the loop was
the cleanup code. But dc39e09942 added another blurb of code between
the loop and the cleanup. That blurb sometimes resets `ret` to zero,
making the cleanup code think that the locking was successful.

Specifically, whenever

* One or more reference deletions have been processed successfully in
  the lock-acquisition loop. (Processing the first such reference
  causes a packed-ref transaction to be initialized.)

* Then `lock_ref_for_update()` fails for a subsequent reference. Such
  a failure can happen for a number of reasons, such as the old SHA-1
  not being correct, lock contention, etc. This causes a `break` out
  of the lock-acquisition loop.

* The `packed-refs` lock is acquired successfully and
  `ref_transaction_prepare()` succeeds for the packed-ref transaction.
  This has the effect of resetting `ret` back to 0, and making the
  cleanup code think that lock acquisition was successful.

In that case, any reference updates that were processed prior to
breaking out of the loop would be carried out (loose and packed), but
the reference that couldn't be locked and any subsequent references
would silently be ignored.

This can easily cause data loss if, for example, the user was trying
to push a new name for an existing branch while deleting the old name.
After the push, the branch could be left unreachable, and could even
subsequently be garbage-collected.

This problem was noticed in the context of deleting one reference and
creating another in a single transaction, when the two references D/F
conflict with each other, like

    git update-ref --stdin <<EOF
    delete refs/foo
    create refs/foo/bar HEAD
    EOF

This triggers the above bug because the deletion is processed
successfully for `refs/foo`, then the D/F conflict causes
`lock_ref_for_update()` to fail when `refs/foo/bar` is processed. In
this case the transaction *should* fail, but instead it causes
`refs/foo` to be deleted without creating `refs/foo`. This could
easily result in data loss.

The fix is simple: instead of just breaking out of the loop, jump
directly to the cleanup code. This fixes some tests in t1404 that were
added in the previous commit.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-25 15:08:26 +09:00
Michael Haggerty
2e9de01aa0 t1404: add a bunch of tests of D/F conflicts
It is currently not allowed, in a single transaction, to add one
reference and delete another reference if the two reference names D/F
conflict with each other (e.g., like `refs/foo/bar` and `refs/foo`).
The reason is that the code would need to take locks

    $GIT_DIR/refs/foo.lock
    $GIT_DIR/refs/foo/bar.lock

But the latter lock couldn't coexist with the loose reference file

    $GIT_DIR/refs/foo

, because `$GIT_DIR/refs/foo` cannot be both a directory and a file at
the same time (hence the name "D/F conflict).

Add a bunch of tests that we cleanly reject such transactions.

In fact, many of the new tests currently fail. They will be fixed in
the next commit along with an explanation.

Reported-by: Jeff King <peff@peff.net>
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-25 15:08:26 +09:00
Junio C Hamano
96c6bb566e Merge branch 'jk/write-in-full-fix' into maint
Many codepaths did not diagnose write failures correctly when disks
go full, due to their misuse of write_in_full() helper function,
which have been corrected.

* jk/write-in-full-fix:
  read_pack_header: handle signed/unsigned comparison in read result
  config: flip return value of store_write_*()
  notes-merge: use ssize_t for write_in_full() return value
  pkt-line: check write_in_full() errors against "< 0"
  convert less-trivial versions of "write_in_full() != len"
  avoid "write_in_full(fd, buf, len) != len" pattern
  get-tar-commit-id: check write_in_full() return against 0
  config: avoid "write_in_full(fd, buf, len) < len" pattern
2017-10-23 14:37:22 +09:00
Junio C Hamano
031062dcab Merge branch 'er/fast-import-dump-refs-on-checkpoint' into maint
The checkpoint command "git fast-import" did not flush updates to
refs and marks unless at least one object was created since the
last checkpoint, which has been corrected, as these things can
happen without any new object getting created.

* er/fast-import-dump-refs-on-checkpoint:
  fast-import: checkpoint: dump branches/tags/marks even if object_count==0
2017-10-23 14:17:27 +09:00
Junio C Hamano
120ce97f9d Merge branch 'jt/fast-export-copy-modify-fix' into maint
"git fast-export" with -M/-C option issued "copy" instruction on a
path that is simultaneously modified, which was incorrect.

* jt/fast-export-copy-modify-fix:
  fast-export: do not copy from modified file
2017-10-23 14:14:51 +09:00
Junio C Hamano
5253ad109a Merge branch 'nd/worktree-kill-parse-ref' into maint
"git branch -M a b" while on a branch that is completely unrelated
to either branch a or branch b misbehaved when multiple worktree
was in use.  This has been fixed.

* nd/worktree-kill-parse-ref:
  branch: fix branch renaming not updating HEADs correctly
2017-10-23 14:14:16 +09:00
Jeff King
cc61cf465f test-ref-store: avoid passing NULL to printf
It's possible for resolve_ref_unsafe() to return NULL (e.g.,
if we are reading and the ref does not exist), in which case
we'll pass NULL to printf. On glibc systems this produces
"(null)", but on others it may segfault.

The tests don't expect any such case, but if we ever did
trigger this, we would prefer to cleanly fail the test with
unexpected input rather than segfault. Let's manually
replace NULL with "(null)". The exact value doesn't matter,
as it won't match any possible ref the caller could expect
(and anyway, the exit code of the program will tell whether
"ref" is valid or not).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-21 21:29:00 +09:00