Commit Graph

9782 Commits

Author SHA1 Message Date
Junio C Hamano
d2f0b72759 Merge branch 'fs/ssh-signing-key-lifetime'
Extend the signing of objects with SSH keys and learn to pay
attention to the key validity time range when verifying.

* fs/ssh-signing-key-lifetime:
  ssh signing: verify ssh-keygen in test prereq
  ssh signing: make fmt-merge-msg consider key lifetime
  ssh signing: make verify-tag consider key lifetime
  ssh signing: make git log verify key lifetime
  ssh signing: make verify-commit consider key lifetime
  ssh signing: add key lifetime test prereqs
  ssh signing: use sigc struct to pass payload
  t/fmt-merge-msg: make gpgssh tests more specific
  t/fmt-merge-msg: do not redirect stderr
2021-12-21 15:03:15 -08:00
Junio C Hamano
00cbaf9362 Merge branch 'jk/log-decorate-opts-with-implicit-decorate'
When "git log" implicitly enabled the "decoration" processing
without being explicitly asked with "--decorate" option, it failed
to read and honor the settings given by the "--decorate-refs"
option.

* jk/log-decorate-opts-with-implicit-decorate:
  log: load decorations with --simplify-by-decoration
  log: handle --decorate-refs with userformat "%d"
2021-12-21 15:03:15 -08:00
Junio C Hamano
159597f5a3 Merge branch 'ab/die-with-bug'
Code clean-up.

* ab/die-with-bug:
  object.c: use BUG(...) no die("BUG: ...") in lookup_object_by_type()
  pathspec: use BUG(...) not die("BUG:%s:%d....", <file>, <line>)
  strbuf.h: use BUG(...) not die("BUG: ...")
  pack-objects: use BUG(...) not die("BUG: ...")
2021-12-15 09:39:55 -08:00
Junio C Hamano
986eb34b71 Merge branch 'es/worktree-chatty-to-stderr'
"git worktree add" showed "Preparing worktree" message to the
standard output stream, but when it failed, the message from die()
went to the standard error stream.  Depending on the order the
stdio streams are flushed at the program end, this resulted in
confusing output.  It has been corrected by sending all the chatty
messages to the standard error stream.

* es/worktree-chatty-to-stderr:
  git-worktree.txt: add missing `-v` to synopsis for `worktree list`
  worktree: send "chatty" messages to stderr
2021-12-15 09:39:49 -08:00
Junio C Hamano
250ca49b4f Merge branch 'hn/reflog-tests'
Prepare tests on ref API to help testing reftable backends.

* hn/reflog-tests:
  refs/debug: trim trailing LF from reflog message
  test-ref-store: tweaks to for-each-reflog-ent format
  t1405: check for_each_reflog_ent_reverse() more thoroughly
  test-ref-store: don't add newline to reflog message
  show-branch: show reflog message
2021-12-15 09:39:49 -08:00
Junio C Hamano
4f7e2f0b21 Merge branch 'rj/receive-pack-avoid-sigpipe-during-status-reporting'
When the "git push" command is killed while the receiving end is
trying to report what happened to the ref update proposals, the
latter used to die, due to SIGPIPE.  The code now ignores SIGPIPE
to increase our chances to run the post-receive hook after it
happens.

* rj/receive-pack-avoid-sigpipe-during-status-reporting:
  receive-pack: ignore SIGPIPE while reporting status to client
2021-12-15 09:39:48 -08:00
Junio C Hamano
832ec72c3e Merge branch 'ab/run-command'
API clean-up.

* ab/run-command:
  run-command API: remove "env" member, always use "env_array"
  difftool: use "env_array" to simplify memory management
  run-command API: remove "argv" member, always use "args"
  run-command API users: use strvec_push(), not argv construction
  run-command API users: use strvec_pushl(), not argv construction
  run-command tests: use strvec_pushv(), not argv assignment
  run-command API users: use strvec_pushv(), not argv assignment
  upload-archive: use regular "struct child_process" pattern
  worktree: stop being overly intimate with run_command() internals
2021-12-15 09:39:47 -08:00
Junio C Hamano
4ce498baa3 Merge branch 'en/zdiff3'
"Zealous diff3" style of merge conflict presentation has been added.

* en/zdiff3:
  update documentation for new zdiff3 conflictStyle
  xdiff: implement a zealous diff3, or "zdiff3"
2021-12-15 09:39:47 -08:00
Junio C Hamano
670703e9d6 Merge branch 'mp/absorb-submodule-git-dir-upon-deinit'
"git submodule deinit" for a submodule whose .git metadata
directory is embedded in its working tree refused to work, until
the submodule gets converted to use the "absorbed" form where the
metadata directory is stored in superproject, and a gitfile at the
top-level of the working tree of the submodule points at it.  The
command is taught to convert such submodules to the absorbed form
as needed.

* mp/absorb-submodule-git-dir-upon-deinit:
  submodule: absorb git dir instead of dying on deinit
2021-12-10 14:35:15 -08:00
Junio C Hamano
b8148376a2 Merge branch 'hn/create-reflog-simplify'
A small simplification of API.

* hn/create-reflog-simplify:
  refs: drop force_create argument of create_reflog API
2021-12-10 14:35:13 -08:00
Junio C Hamano
f0850875fd Merge branch 'vd/sparse-reset'
Various operating modes of "git reset" have been made to work
better with the sparse index.

* vd/sparse-reset:
  unpack-trees: improve performance of next_cache_entry
  reset: make --mixed sparse-aware
  reset: make sparse-aware (except --mixed)
  reset: integrate with sparse index
  reset: expand test coverage for sparse checkouts
  sparse-index: update command for expand/collapse test
  reset: preserve skip-worktree bit in mixed reset
  reset: rename is_missing to !is_in_reset_tree
2021-12-10 14:35:12 -08:00
Junio C Hamano
cb136bd852 Merge branch 'po/size-t-for-vs'
On platforms where ulong is shorter than size_t, code paths that
shifted 1 or 1U to the left lacked the necessary cast to size_t,
which have been corrected.

* po/size-t-for-vs:
  object-file.c: LLP64 compatibility, upcast unity for left shift
  diffcore-delta.c: LLP64 compatibility, upcast unity for left shift
  repack.c: LLP64 compatibility, upcast unity for left shift
2021-12-10 14:35:10 -08:00
Junio C Hamano
8e715503f1 Merge branch 'ah/advice-pull-has-no-preference-between-rebase-and-merge'
The advice message given by "git pull" when the user hasn't made a
choice between merge and rebase still said that the merge is the
default, which no longer is the case.  This has been corrected.

* ah/advice-pull-has-no-preference-between-rebase-and-merge:
  pull: don't say that merge is "the default strategy"
2021-12-10 14:35:09 -08:00
Junio C Hamano
7b11728a7b Merge branch 'ab/checkout-branch-info-leakfix'
Leakfix.

* ab/checkout-branch-info-leakfix:
  checkout: fix "branch info" memory leaks
2021-12-10 14:35:09 -08:00
Junio C Hamano
03194a1afa Merge branch 'tw/var-default-branch'
"git var GIT_DEFAULT_BRANCH" is a way to see what name is used for
the newly created branch if "git init" is run.

* tw/var-default-branch:
  var: add GIT_DEFAULT_BRANCH variable
2021-12-10 14:35:07 -08:00
Junio C Hamano
23c83fc473 Merge branch 'ja/doc-cleanup'
Doc update.

* ja/doc-cleanup:
  init doc: --shared=0xxx does not give umask but perm bits
  doc: git-init: clarify file modes in octal.
  doc: git-http-push: describe the refs as pattern pairs
  doc: uniformize <URL> placeholders' case
  doc: use three dots for indicating repetition instead of star
  doc: git-ls-files: express options as optional alternatives
  doc: use only hyphens as word separators in placeholders
  doc: express grammar placeholders between angle brackets
  doc: split placeholders as individual tokens
  doc: fix git credential synopsis
2021-12-10 14:35:03 -08:00
Fabian Stelzer
02769437e1 ssh signing: use sigc struct to pass payload
To be able to extend the payload metadata with things like its creation
timestamp or the creators ident we remove the payload parameters to
check_signature() and use the already existing sigc->payload field
instead, only adding the length field to the struct. This also allows
us to get rid of the xmemdupz() calls in the verify functions. Since
sigc is now used to input data as well as output the result move it to
the front of the function list.

 - Add payload_length to struct signature_check
 - Populate sigc.payload/payload_len on all call sites
 - Remove payload parameters to check_signature()
 - Remove payload parameters to internal verify_* functions and use sigc
   instead
 - Remove xmemdupz() used for verbose output since payload is now already
   populated.

Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-09 13:38:04 -08:00
Ævar Arnfjörð Bjarmason
5867757d88 pack-objects: use BUG(...) not die("BUG: ...")
Change this code added in da93d12b00 (pack-objects: be incredibly
anal about stdio semantics, 2006-04-02) to use BUG() instead.

See 1a07e59c3e (Update messages in preparation for i18n, 2018-07-21)
for when the "BUG: " prefix was added, and [1] for background on the
Solaris behavior that prompted the exhaustive error checking in this
fgets() loop.

1. https://lore.kernel.org/git/824.1144007555@lotus.CS.Berkeley.EDU/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-07 12:31:16 -08:00
Eric Sunshine
da8fb6be55 worktree: send "chatty" messages to stderr
The order in which the stdout and stderr streams are flushed is not
guaranteed to be the same across platforms or `libc` implementations.
This lack of determinism can lead to anomalous and potentially confusing
output if normal (stdout) output is flushed after error (stderr) output.
For instance, the following output which clearly indicates a failure due
to a fatal error:

    % git worktree add ../foo bar
    Preparing worktree (checking out 'bar')
    fatal: 'bar' is already checked out at '.../wherever'

has been reported[1] on Microsoft Windows to appear as:

    % git worktree add ../foo bar
    fatal: 'bar' is already checked out at '.../wherever'
    Preparing worktree (checking out 'bar')

which may confuse the reader into thinking that the command somehow
recovered and ran to completion despite the error.

This problem crops up because the "chatty" status message "Preparing
worktree" is sent to stdout, whereas the "fatal" error message is sent
to stderr. One way to fix this would be to flush stdout manually before
git-worktree reports any errors to stderr.

However, common practice in Git is for "chatty" messages to be sent to
stderr. Therefore, a more appropriate fix is to adjust git-worktree to
conform to that practice by sending its "chatty" messages to stderr
rather than stdout as is currently the case.

There may be concern that relocating messages from stdout to stderr
could break existing tooling, however, these messages are already
internationalized, thus are unstable. And, indeed, the "Preparing
worktree" message has already been the subject of somewhat significant
changes in 2c27002a0a (worktree: improve message when creating a new
worktree, 2018-04-24). Moreover, there is existing precedent, such as
68b939b2f0 (clone: send diagnostic messages to stderr, 2013-09-18) which
likewise relocated "chatty" messages from stdout to stderr for
git-clone.

[1]: https://lore.kernel.org/git/CA+34VNLj6VB1kCkA=MfM7TZR+6HgqNi5-UaziAoCXacSVkch4A@mail.gmail.com/T/

Reported-by: Baruch Burstein <bmburstein@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-04 23:27:11 -08:00
Han-Wen Nienhuys
f2463490c4 show-branch: show reflog message
Before, --reflog option would look for '\t' in the reflog message. As refs.c
already parses the reflog line, the '\t' was never found, and show-branch
--reflog would always say "(none)" as reflog message

Add test.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-02 11:14:07 -08:00
Jeff King
be73860793 log: load decorations with --simplify-by-decoration
It's possible to specify --simplify-by-decoration but not --decorate. In
this case we do respect the simplification, but we don't actually show
any decorations. However, it works by lazy-loading the decorations when
needed; this is discussed in more detail in 0cc7380d88 (log-tree: call
load_ref_decorations() in get_name_decoration(), 2019-09-08).

This works for basic cases, but will fail to respect any --decorate-refs
option (or its variants). Those are handled only when cmd_log_init()
loads the ref decorations up front, which is only when --decorate is
specified explicitly (or as of the previous commit, when the userformat
asks for %d or similar).

We can solve this by making sure to load the decorations if we're going
to simplify using them but they're not otherwise going to be displayed.

The new test shows a simple case that fails without this patch. Note
that we expect two commits in the output: the one we asked for by
--decorate-refs, and the initial commit. The latter is just a quirk of
how --simplify-by-decoration works. Arguably it may be a bug, but it's
unrelated to this patch (which is just about the loading of the
decorations; you get the same behavior before this patch with an
explicit --decorate).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-01 23:10:50 -08:00
Jeff King
14b9c2b3e3 log: handle --decorate-refs with userformat "%d"
In order to show ref decorations, we first have to load them. If you
run:

  git log --decorate

then git-log will recognize the option and load them up front via
cmd_log_init(). Likewise if log.decorate is set.

If you don't say --decorate explicitly, but do mention "%d" or "%D" in
the output format, like so:

  git log --format=%d

then this also works, because we lazy-load the ref decorations. This has
been true since 3b3d443feb (add '%d' pretty format specifier to show
decoration, 2008-09-04), though the lazy-load was later moved into
log-tree.c.

But there's one problem: that lazy-load just uses the defaults; it
doesn't take into account any --decorate-refs options (or its exclude
variant, or their config). So this does not work:

  git log --decorate-refs=whatever --format=%d

It will decorate using all refs, not just the specified ones. This has
been true since --decorate-refs was added in 65516f586b (log: add option
to choose which refs to decorate, 2017-11-21). Adding further confusion
is that it _may_ work because of the auto-decoration feature. If that's
in use (and it often is, as it's the default), then if the output is
going to stdout, we do enable decorations early (and so load them up
front, respecting the extra options). But otherwise we do not. So:

  git log --decorate-refs=whatever --format=%d >some-file

would typically behave differently than it does when the output goes to
the pager or terminal!

The solution is simple: we should recognize in cmd_log_init() that we're
going to show decorations, and make sure we load them there. We already
check userformat_find_requirements(), so we can couple this with our
existing code there.

There are two new tests. The first shows off the actual fix. The second
makes sure that our fix doesn't cause us to stomp on an existing
--decorate option (see the new comment in the code, as well).

Reported-by: Josh Rampersad <josh.rampersad@voiceflow.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-01 22:58:46 -08:00
Philip Oakley
a43abad1e3 repack.c: LLP64 compatibility, upcast unity for left shift
Visual Studio reports C4334 "was 64-bit shift intended" warning
because of size mismatch.

Promote unity to the matching type to fit with the `&` operator.

Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-01 14:48:09 -08:00
Elijah Newren
ddfc44a898 update documentation for new zdiff3 conflictStyle
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-01 14:45:59 -08:00
Phillip Wood
4496526f80 xdiff: implement a zealous diff3, or "zdiff3"
"zdiff3" is identical to ordinary diff3 except that it allows compaction
of common lines on the two sides of history at the beginning or end of
the conflict hunk.  For example, the following diff3 conflict:

    1
    2
    3
    4
    <<<<<<
    A
    B
    C
    D
    E
    ||||||
    5
    6
    ======
    A
    X
    C
    Y
    E
    >>>>>>
    7
    8
    9

has common lines 'A', 'C', and 'E' on the two sides.  With zdiff3, one
would instead get the following conflict:

    1
    2
    3
    4
    A
    <<<<<<
    B
    C
    D
    ||||||
    5
    6
    ======
    X
    C
    Y
    >>>>>>
    E
    7
    8
    9

Note that the common lines, 'A', and 'E' were moved outside the
conflict.  Unlike with the two-way conflicts from the 'merge'
conflictStyle, the zdiff3 conflict is NOT split into multiple conflict
regions to allow the common 'C' lines to be shown outside a conflict,
because zdiff3 shows the base version too and the base version cannot be
reasonably split.

Note also that the removing of lines common to the two sides might make
the remaining text inside the conflict region match the base text inside
the conflict region (for example, if the diff3 conflict had '5 6 E' on
the right side of the conflict, then the common line 'E' would be moved
outside and both the base and right side's remaining conflict text would
be the lines '5' and '6').  This has the potential to surprise users and
make them think there should not have been a conflict, but there
definitely was a conflict and it should remain.

Based-on-patch-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Co-authored-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-12-01 14:45:58 -08:00
Junio C Hamano
49767c3d9f Merge branch 'tb/plug-pack-bitmap-leaks'
Leakfix.

* tb/plug-pack-bitmap-leaks:
  pack-bitmap.c: more aggressively free in free_bitmap_index()
  pack-bitmap.c: don't leak type-level bitmaps
  midx.c: write MIDX filenames to strbuf
  builtin/multi-pack-index.c: don't leak concatenated options
  builtin/repack.c: avoid leaking child arguments
  builtin/pack-objects.c: don't leak memory via arguments
  t/helper/test-read-midx.c: free MIDX within read_midx_file()
  midx.c: don't leak MIDX from verify_midx_file
  midx.c: clean up chunkfile after reading the MIDX
2021-11-29 15:41:49 -08:00
Junio C Hamano
5126145ba8 Merge branch 'jc/fix-ref-sorting-parse'
Things like "git -c branch.sort=bogus branch new HEAD", i.e. the
operation modes of the "git branch" command that do not need the
sort key information, no longer errors out by seeing a bogus sort
key.

* jc/fix-ref-sorting-parse:
  for-each-ref: delay parsing of --sort=<atom> options
2021-11-29 15:41:47 -08:00
Junio C Hamano
44ac8fd1b4 Merge branch 'so/stash-staged'
"git stash" learned the "--staged" option to stash away what has
been added to the index (and nothing else).

* so/stash-staged:
  stash: get rid of unused argument in stash_staged()
  stash: implement '--staged' option for 'push' and 'save'
2021-11-29 15:41:47 -08:00
Victoria Dye
4d1cfc1351 reset: make --mixed sparse-aware
Remove the `ensure_full_index` guard on `read_from_tree` and update `git
reset --mixed` to ensure it can use sparse directory index entries wherever
possible. Sparse directory entries are reset using `diff_tree_oid`, which
requires `change` and `add_remove` functions to process the internal
contents of the sparse directory. The `recursive` diff option handles cases
in which `reset --mixed` must diff/merge files that are nested multiple
levels deep in a sparse directory.

The use of pathspecs with `git reset --mixed` introduces scenarios in which
internal contents of sparse directories may be matched by the pathspec. In
order to reset *all* files in the repo that may match the pathspec, the
following conditions on the pathspec require index expansion before
performing the reset:

* "magic" pathspecs
* wildcard pathspecs that do not match only in-cone files or entire sparse
  directories
* literal pathspecs matching something outside the sparse checkout
  definition

Helped-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-29 12:51:26 -08:00
Victoria Dye
c01b1cbd47 reset: integrate with sparse index
Disable `command_requires_full_index` repo setting and add
`ensure_full_index` guards around code paths that cannot yet use sparse
directory index entries. `reset --soft` does not modify the index, so no
compatibility changes are needed for it to function without expanding the
index. For all other reset modes (`--mixed`, `--hard`, `--keep`, `--merge`),
the full index is expanded to prevent cache tree corruption and invalid
variable accesses.

Additionally, the `read_cache()` check verifying an uncorrupted index is
moved after argument parsing and preparing the repo settings. The index is
not used by the preceding argument handling, but `read_cache()` must be run
*after* enabling sparse index for the command (so that the index is not
expanded unnecessarily) and *before* using the index for reset (so that it
is verified as uncorrupted).

Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-29 12:51:26 -08:00
Ævar Arnfjörð Bjarmason
c7c4bdeccf run-command API: remove "env" member, always use "env_array"
Remove the "env" member from "struct child_process" in favor of always
using the "env_array". As with the preceding removal of "argv" in
favor of "args" this gets rid of current and future oddities around
memory management at the API boundary (see the amended API docs).

For some of the conversions we can replace patterns like:

    child.env = env->v;

With:

    strvec_pushv(&child.env_array, env->v);

But for others we need to guard the strvec_pushv() with a NULL check,
since we're not passing in the "v" member of a "struct strvec",
e.g. in the case of tmp_objdir_env()'s return value.

Ideally we'd rename the "env_array" member to simply "env" as a
follow-up, since it and "args" are now inconsistent in not having an
"_array" suffix, and seemingly without any good reason, unless we look
at the history of how they came to be.

But as we've currently got 122 in-tree hits for a "git grep env_array"
let's leave that for now (and possibly forever). Doing that rename
would be too disruptive.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-25 22:15:08 -08:00
Ævar Arnfjörð Bjarmason
26a15355d6 difftool: use "env_array" to simplify memory management
Amend code added in 03831ef7b5 (difftool: implement the functionality
in the builtin, 2017-01-19) to use the "env_array" in the
run_command.[ch] API. Now we no longer need to manage our own
"index_env" buffer.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-25 22:15:08 -08:00
Ævar Arnfjörð Bjarmason
7f14609e29 run-command API users: use strvec_push(), not argv construction
Change a pattern of hardcoding an "argv" array size, populating it and
assigning to the "argv" member of "struct child_process" to instead
use "strvec_push()" to add data to the "args" member.

As noted in the preceding commit this moves us further towards being
able to remove the "argv" member in a subsequent commit

These callers could have used strvec_pushl(), but moving to
strvec_push() makes the diff easier to read, and keeps the arguments
aligned as before.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-25 22:15:07 -08:00
Ævar Arnfjörð Bjarmason
2b7098936c run-command API users: use strvec_pushl(), not argv construction
Change a pattern of hardcoding an "argv" array size, populating it and
assigning to the "argv" member of "struct child_process" to instead
use "strvec_pushl()" to add data to the "args" member.

This implements the same behavior as before in fewer lines of code,
and moves us further towards being able to remove the "argv" member in
a subsequent commit.

Since we've entirely removed the "argv" variable(s) we can be sure
that no potential logic errors of the type discussed in a preceding
commit are being introduced here, i.e. ones where the local "argv" was
being modified after the assignment to "struct child_process"'s
"argv".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-25 22:15:07 -08:00
Ævar Arnfjörð Bjarmason
c8a4cd55d9 upload-archive: use regular "struct child_process" pattern
This pattern added [1] in seems to have been intentional, but since
[2] and [3] we've wanted do initialization of what's now the "struct
strvec" "args" and "env_array" members. Let's not trample on that
initialization here.

1. 1bc01efed1 (upload-archive: use start_command instead of fork,
   2011-11-19)
2. c460c0ecdc (run-command: store an optional argv_array, 2014-05-15)
3. 9a583dc39e (run-command: add env_array, an optional argv_array for
   env, 2014-10-19)

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-25 22:15:07 -08:00
Eric Sunshine
33c997a411 worktree: stop being overly intimate with run_command() internals
add_worktree() reuses a `child_process` for three run_command()
invocations, but to do so, it has overly-intimate knowledge of
run-command.c internals. In particular, it knows that it must reset
child_process::argv to NULL for each subsequent invocation[*] in order
for start_command() to latch the newly-populated child_process::args for
each invocation, even though this behavior is not a part of the
documented API. Beyond having overly-intimate knowledge of run-command.c
internals, the reuse of one `child_process` for three run_command()
invocations smells like an unnecessary micro-optimization. Therefore,
stop sharing one `child_process` and instead use a new one for each
run_command() call.

[*] If child_process::argv is not reset to NULL, then subsequent
run_command() invocations will instead incorrectly access a dangling
pointer to freed memory which had been allocated by child_process::args
on the previous run. This is due to the following code in
start_command():

    if (!cmd->argv)
        cmd->argv = cmd->args.v;

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-25 22:15:07 -08:00
Junio C Hamano
ad03180c5c Merge branch 'ev/pull-already-up-to-date-is-noop' into maint
"git pull" with any strategy when the other side is behind us
should succeed as it is a no-op, but doesn't.

* ev/pull-already-up-to-date-is-noop:
  pull: should be noop when already-up-to-date
2021-11-23 14:48:04 -08:00
Han-Wen Nienhuys
7b089120d9 refs: drop force_create argument of create_reflog API
There is only one caller, builtin/checkout.c, and it hardcodes
force_create=1.

This argument was introduced in abd0cd3a30 (refs: new public ref function:
safe_create_reflog, 2015-07-21), which promised to immediately use it in a
follow-on commit, but that never happened.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-22 11:01:25 -08:00
Junio C Hamano
0f2140f105 Merge branch 'ev/pull-already-up-to-date-is-noop'
"git pull" with any strategy when the other side is behind us
should succeed as it is a no-op, but doesn't.

* ev/pull-already-up-to-date-is-noop:
  pull: should be noop when already-up-to-date
2021-11-21 21:57:04 -08:00
Mugdha Pattnaik
0adc8ba6ae submodule: absorb git dir instead of dying on deinit
Currently, running 'git submodule deinit' on repos where the
submodule's '.git' is a directory, aborts with a message that is not
exactly user friendly.

Let's change this to instead warn the user that the .git/ directory
has been absorbed into the superproject.
The rest of the deinit function can operate as it already does with
new-style submodules.

In one test, we used to require "git submodule deinit" to fail even
with the "--force" option when the submodule's .git/ directory is not
absorbed. Adjust it to expect the operation to pass.

Suggested-by: Atharva Raykar <raykar.ath@gmail.com>
Signed-off-by: Mugdha Pattnaik <mugdhapattnaik@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-19 09:19:54 -08:00
Alex Henrie
71076d0edd pull: don't say that merge is "the default strategy"
Git no longer has a default strategy for reconciling divergent branches,
because there's no way for Git to know which strategy is appropriate in
any particular situation.

The initially proposed version in [*], that eventually became
031e2f7a (pull: abort by default when fast-forwarding is not
possible, 2021-07-22), dropped this phrase from the message, but
it was left in the final version by accident.

* https://lore.kernel.org/git/20210627000855.530985-1-alexhenrie24@gmail.com/

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-19 09:14:15 -08:00
Erwin Villejo
ea1954af77 pull: should be noop when already-up-to-date
The already-up-to-date pull bug was fixed for --ff-only but it did not
include the case where --ff or --ff-only are not specified. This updates
the --ff-only fix to include the case where --ff or --ff-only are not
specified in command line flags or config.

Signed-off-by: Erwin Villejo <erwin.villejo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-18 14:38:53 -08:00
Ævar Arnfjörð Bjarmason
9081a421a6 checkout: fix "branch info" memory leaks
The "checkout" command is one of the main sources of leaks in the test
suite, let's fix the common ones by not leaking from the "struct
branch_info".

Doing this is rather straightforward, albeit verbose, we need to
xstrdup() constant strings going into the struct, and free() the ones
we clobber as we go along.

This also means that we can delete previous partial leak fixes in this
area, i.e. the "path_to_free" accounting added by 96ec7b1e70 (Convert
resolve_ref+xstrdup to new resolve_refdup function, 2011-12-13).

There was some discussion about whether "we should retain the "const
char *" here and cast at free() time, or have it be a "char *". Since
this is not a public API with any sort of API boundary let's use
"char *", as is already being done for the "refname" member of the
same struct.

The tests to mark as passing were found with:

    rm .prove; GIT_SKIP_TESTS=t0027 prove -j8 --state=save t[0-9]*.sh :: --immediate
    # apply & compile this change
    prove -j8 --state=failed :: --immediate

I.e. the ones that were newly passing when the --state=failed command
was run. I left out "t3040-subprojects-basic.sh" and
"t4131-apply-fake-ancestor.sh" to to optimization-level related
differences similar to the ones noted in[1], except that these would
be something the current 'linux-leaks' job would run into.

1. https://lore.kernel.org/git/cover-v3-0.6-00000000000-20211022T175227Z-avarab@gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-18 14:32:26 -08:00
Junio C Hamano
2c0fa66bc8 Merge branch 'ab/fsck-unexpected-type'
Regression fix.

* ab/fsck-unexpected-type:
  object-file: free(*contents) only in read_loose_object() caller
  object-file: fix SEGV on free() regression in v2.34.0-rc2
2021-11-12 15:29:25 -08:00
Ævar Arnfjörð Bjarmason
16235e3b14 object-file: free(*contents) only in read_loose_object() caller
In the preceding commit a free() of uninitialized memory regression in
96e41f58fe (fsck: report invalid object type-path combinations,
2021-10-01) was fixed, but we'd still have an issue with leaking
memory from fsck_loose(). Let's fix that issue too.

That issue was introduced in my 31deb28f5e (fsck: don't hard die on
invalid object types, 2021-10-01). It can be reproduced under
SANITIZE=leak with the test I added in 093fffdfbe (fsck tests: add
test for fsck-ing an unknown type, 2021-10-01):

    ./t1450-fsck.sh --run=84 -vixd

In some sense it's not a problem, we lost the same amount of memory in
terms of things malloc'd and not free'd. It just moved from the "still
reachable" to "definitely lost" column in valgrind(1) nomenclature[1],
since we'd have die()'d before.

But now that we don't hard die() anymore in the library let's properly
free() it. Doing so makes this code much easier to follow, since we'll
now have one function owning the freeing of the "contents" variable,
not two.

For context on that memory management pattern the read_loose_object()
function was added in f6371f9210 (sha1_file: add read_loose_object()
function, 2017-01-13) and subsequently used in c68b489e56 (fsck:
parse loose object paths directly, 2017-01-13). The pattern of it
being the task of both sides to free() the memory has been there in
this form since its inception.

1. https://valgrind.org/docs/manual/mc-manual.html#mc-manual.leaks

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-11 13:40:43 -08:00
Junio C Hamano
c1d16cedd4 Merge branch 'ds/no-usable-cron-on-macos'
"git maintenance run" learned to use system supplied scheduler
backend, but cron on macOS turns out to be unusable for this
purpose.

* ds/no-usable-cron-on-macos:
  maintenance: disable cron on macOS
2021-11-10 15:01:20 -08:00
Junio C Hamano
7c7cf62c48 Merge branch 'jc/fix-pull-ff-only-when-already-up-to-date'
"git pull --ff-only" and "git pull --rebase --ff-only" should make
it a no-op to attempt pulling from a remote that is behind us, but
instead the command errored out by saying it was impossible to
fast-forward, which may technically be true, but not a useful thing
to diagnose as an error.  This has been corrected.

* jc/fix-pull-ff-only-when-already-up-to-date:
  pull: --ff-only should make it a noop when already-up-to-date
2021-11-10 15:01:19 -08:00
Robin Jarry
d34182b9e3 receive-pack: ignore SIGPIPE while reporting status to client
Before running the post-receive hook, status info is reported back to
the client. If a remote client exits before or during the status report,
receive-pack is killed by SIGPIPE and post-receive is never executed.

The post-receive hook is often used to send email notifications (see
contrib/hooks/post-receive-email), update bug trackers, start automatic
builds, etc. Not executing it after an interrupted yet "successful" push
can lead to inconsistencies.

Ignore SIGPIPE before reporting status to the client to increase the
chances of post-receive running if pre-receive was successful. This does
not guarantee 100% consistency but it should resist early disconnection
by the client.

Signed-off-by: Robin Jarry <robin@jarry.cc>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-10 13:43:04 -08:00
Derrick Stolee
689a2aa719 maintenance: disable cron on macOS
In eba1ba9 (maintenance: `git maintenance run` learned
`--scheduler=<scheduler>`, 2021-09-04), we introduced the ability to
specify a scheduler explicitly. This led to some extra checks around
whether an alternative scheduler was available. This added the
functionality of removing background maintenance from schedulers other
than the one selected.

On macOS, cron is technically available, but running 'crontab' triggers
a UI prompt asking for special permissions. This is the major reason why
launchctl is used as the default scheduler. The is_crontab_available()
method triggers this UI prompt, causing user disruption.

Remove this disruption by using an #ifdef to prevent running crontab
this way on macOS. This has the unfortunate downside that if a user
manually selects cron via the '--scheduler' option, then adjusting the
scheduler later will not remove the schedule from cron. The
'--scheduler' option ignores the is_available checks, which is how we
can get into this situation.

Extract the new check_crontab_process() method to avoid making the
'child' variable unused on macOS. The method is marked MAYBE_UNUSED
because it has no callers on macOS.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-10 11:20:20 -08:00
Junio C Hamano
a876f0b95c Merge branch 'ar/fix-git-pull-no-verify'
"git pull --no-verify" did not affect the underlying "git merge".

* ar/fix-git-pull-no-verify:
  pull: honor --no-verify and do not call the commit-msg hook
2021-11-04 12:07:46 -07:00