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Create a new "File formats, protocols and other developer interfaces"
section in the main "git help git" manual page and start moving the
documentation that now lives in "Documentation/technical/*.git" over
to it. This complements the newly added and adjacent "Repository,
command and file interfaces" section.
This makes the technical documentation more accessible and
discoverable. Before this we wouldn't install it by default, and had
no ability to build man page versions of them. The links to them from
our existing documentation link to the generated HTML version of these
docs.
So let's start moving those over, starting with just the
"bundle-format.txt" documentation added in 7378ec90e1c (doc: describe
Git bundle format, 2020-02-07). We'll now have a new
gitformat-bundle(5) man page. Subsequent commits will move more git
internal format documentation over.
Unfortunately the syntax of the current Documentation/technical/*.txt
is not the same (when it comes to section headings etc.) as our
Documentation/*.txt documentation, so change the relevant bits of
syntax as we're moving this over.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create a new "Repository, command and file interfaces" section in the
main "git help git" manual page. Move things that belong under this
new criteria from the generic "Guides" section.
The "Guides" section was added in f442f28a81b (git.txt: add list of
guides, 2020-08-05). It makes sense to have e.g. "giteveryday(7)" and
"gitfaq(7)" listed under "Guides".
But placing e.g. "gitignore(5)" in it is stretching the meaning of
what a "guide" is, ideally that section should list things similar to
"giteveryday(7)" and "gitcore-tutorial(7)".
An alternate name that was considered for this new section was "User
formats", for consistency with the nomenclature used for man section 5
in general. My man(1) lists it as "File formats and conventions,
e.g. /etc/passwd".
So calling this "git help --formats" or "git help --user-formats"
would make sense for e.g. gitignore(5), but would be stretching it
somewhat for githooks(5), and would seem really suspect for the likes
of gitcli(7).
Let's instead pick a name that's closer to the generic term "User
interface", which is really what this documentation discusses: General
user-interface documentation that doesn't obviously belong elsewhere.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Replace the use of "<guide>" originally introduced (as "GUIDE") in
a133737b809 (doc: include --guide option description for "git help",
2013-04-02) with the more generic "<doc>". The "<doc>" placeholder is
more generic, and one we'll be able to use as we introduce new
documentation categories.
Let's also add "<doc>" to the "git help -h" output, when it was made
to use parse_option() in in 41eb33bd0cb (help: use parseopt,
2008-02-24).
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change the behavior of the "git" prefix stripping for CAT_guide so
that we don't try to strip the "git-" prefix in that case. We should
be stripping either "git" or "git-" depending on the category. This
change makes it easier to add extra "category" conditions in
subsequent commits.
Before this we'd in principle strip a "git-" prefix from a "guide" in
command-list.txt, in practice we have no such entry there. As we don't
have any entry that looks like "git-foo" in command-list.txt this
changes nothing in practice, but it makes the intent of the code
clearer. In that hypothetical case we'd now strip it down to "-foo",
not "foo".
When this code was added in cfb22a02ab5 (help: use command-list.h for
common command list, 2018-05-10) the only entries in command-list.txt
that didn't begin with "git-" were "gitweb" and "gitk".
Then when the "guides" special-case was added in 1b81d8cb19d (help:
use command-list.txt for the source of guides, 2018-05-20) we had the
various "git" (not "git-") prefixed "guide" entries, which the
"CAT_guide" case handles.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Refactor the drop_prefix() function in in help.c to make it easier to
strip prefixes from categories that aren't "CAT_guide". There are no
functional changes here, by doing this we make a subsequent functional
change's diff smaller.
As before we first try to strip "git-" unconditionally, if that works
we'll return the stripped string. Then we'll strip "git" if the
command is in "CAT_guide".
This means that we'd in principle strip "git-foo" down to "foo" if
it's in CAT_guide. That doesn't make much sense, and we don't have
such an entry in command-list.txt, but let's preserve that behavior
for now.
While we're at it remove a stray newline that had been added after the
"return name;" statement.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When attempting to merge in a superproject with conflicting submodule
pointers that cannot be fast-forwarded or trivially resolved, the merge
fails and Git prints an error message that accurately describes the
failure, but does not provide steps for the user to resolve the error.
Git is left in a conflicted state, which requires the user to:
1. merge submodules or update submodules to an already existing
commit that reflects the merge
2. add submodules changes to the superproject
3. finish merging superproject
These steps are non-obvious for newer submodule users to figure out
based on the error message and neither `git submodule status` nor `git
status` provide any useful pointers.
Update error message to provide steps to resolve submodule merge
conflict. Future work could involve adding an advice flag to the
message. Although the message is long, it also has the id of the
submodule commit that needs to be merged, which could be useful
information for the user.
Additionally, 5 merge failures that resulted in an early return have
been updated to reflect the status of the merge.
1. Null merge base (null o): CONFLICT_SUBMODULE_NULL_MERGE_BASE added
as a new conflict type and will print updated error message.
2. Null merge side a (null a): BUG(). See [1] for discussion
3. Null merge side b (null b): BUG(). See [1] for discussion
4. Submodule not checked out: added NEEDSWORK bit
5. Submodule commits not present: added NEEDSWORK bit
The errors with a NEEDSWORK bit deserve a more detailed explanation of
how to resolve them. See [2] for more context.
[1] https://lore.kernel.org/git/CABPp-BE0qGwUy80dmVszkJQ+tcpfLRW0OZyErymzhZ9+HWY1mw@mail.gmail.com/
[2] https://lore.kernel.org/git/xmqqpmhjjwo9.fsf@gitster.g/
Signed-off-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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131b94a10a ("test-lib.sh: Use GLIBC_TUNABLES instead of MALLOC_CHECK_
on glibc >= 2.34", 2022-03-04) introduced a check for the version of
glibc that is in use. This check is performed as part of
setup_malloc_check() which is called at least once for each test. As
the test involves forking `getconf` and `expr` cache the result and
use that within setup_malloc_check() to avoid forking these extra
processes for each test.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "--[no-]rerere-autoupdate" option controls what happens _after_
the rerere mechanism kicks in to reuse recorded resolutions and does
not prevent from the rerere mechanism to trigger in the first place.
It is unclear in the current text if "--no-rerere-autoupdate" stops
the auto-resolution. Rewrite the sentence to clarify.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `--rerere-autoupdate` option is shared across 5 commands, and
are described the same way because it works exactly the same way in
these commands.
Create a separate file and include it from the help pages for these
commands, so that we can improve the description at one place to
improve all of them at once, and keep them in sync.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code clean-up.
* jc/string-list-cleanup:
builtin/remote.c: use the right kind of STRING_LIST_INIT
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When "git merge" finds that it cannot perform a merge, it should
restore the working tree to the state before the command was
initiated, but in some corner cases it didn't.
* en/merge-restore-to-pristine:
merge: do not exit restore_state() prematurely
merge: ensure we can actually restore pre-merge state
merge: make restore_state() restore staged state too
merge: fix save_state() to work when there are stat-dirty files
merge: do not abort early if one strategy fails to handle the merge
merge: abort if index does not match HEAD for trivial merges
merge-resolve: abort if index does not match HEAD
merge-ort-wrappers: make printed message match the one from recursive
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Make our mergesort implementation type-safe.
* rs/mergesort:
mergesort: remove llist_mergesort()
packfile: use DEFINE_LIST_SORT
fetch-pack: use DEFINE_LIST_SORT
commit: use DEFINE_LIST_SORT
blame: use DEFINE_LIST_SORT
test-mergesort: use DEFINE_LIST_SORT
test-mergesort: use DEFINE_LIST_SORT_DEBUG
mergesort: add macros for typed sort of linked lists
mergesort: tighten merge loop
mergesort: unify ranks loops
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"git cat-file" learned an option to use the mailmap when showing
commit and tag objects.
* sa/cat-file-mailmap:
cat-file: add mailmap support
ident: rename commit_rewrite_person() to apply_mailmap_to_header()
ident: move commit_rewrite_person() to ident.c
revision: improve commit_rewrite_person()
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"git ls-files" learns the "--format" option to tweak its output.
* zh/ls-files-format:
ls-files: introduce "--format" option
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There was a bug in the codepath to upgrade generation information
in commit-graph from v1 to v2 format, which has been corrected.
* tb/commit-graph-genv2-upgrade-fix:
commit-graph: fix corrupt upgrade from generation v1 to v2
commit-graph: introduce `repo_find_commit_pos_in_graph()`
t5318: demonstrate commit-graph generation v2 corruption
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Fix for a bug that makes write-tree to fail to write out a
non-existent index as a tree, introduced in 2.37.
* tk/untracked-cache-with-uall:
read-cache: make `do_read_index()` always set up `istate->repo`
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Add a level of redirection to array allocation API in xdiff part,
to make it easier to share with the libgit2 project.
* pw/xdiff-alloc:
xdiff: introduce XDL_ALLOC_GROW()
xdiff: introduce XDL_CALLOC_ARRAY()
xdiff: introduce xdl_calloc
xdiff: introduce XDL_ALLOC_ARRAY()
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The codepath to write multi-pack index has been taught to release a
large chunk of memory that holds an array of objects in the packs,
as soon as it is done with the array, to reduce memory consumption.
* ds/midx-with-less-memory:
write_midx_bitmap(): drop unused refs_snapshot parameter
midx: reduce memory pressure while writing bitmaps
midx: extract bitmap write setup
pack-bitmap-write: use const for hashes
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Add a "free_removed_argv_elements" member to "struct
setup_revision_opt", and use it to fix several memory leaks.
We have various memory leaks in APIs that take and munge "const
char **argv", e.g. parse_options(). Sometimes these APIs are given the
"argv" we get to the "main" function, in which case we don't leak
memory, but other times we're giving it the "v" member of a "struct
strvec" we created.
There's several potential ways to fix those sort of leaks, we could
add a "nodup" mode to "struct strvec", which would work for the cases
where we push constant strings to it. But that wouldn't work as soon
as we used strvec_pushf(), or otherwise needed to duplicate or create
a string for that "struct strvec".
Let's instead make it the responsibility of the revisions API. If it's
going to clobber elements of argv it can also free() them, which it
will now do if instructed to do so via "free_removed_argv_elements".
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Partially fix the memory leak noted in in 8a534b61241 (bisect: use
argv_array API, 2011-09-13), which added the "XXX" comment seen in the
context. We can partially fix it by having the bisect_rev_setup()
function take a "struct strvec", rather than constructing it.
As the comment notes we need to keep the construct "rev_argv" around
while the "struct rev_info" is around, which as seen in the newly
added "strvec_clear()" calls here we do after "release_revisions()".
This "partially" fixes the memory leak because we're leaking the "--"
added to the "rev_argv" here still, which will be addressed in a
subsequent commit.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Refactor the juggling of "rev.pending" and our replacement for it
amended in the preceding commit so that:
* We use an "unsigned int" instead of an "int" for "i", this matches
the types of "struct rev_info" itself.
* We don't need the "count" and "objects" variables introduced in
5d7eeee2ac6 (git-show: grok blobs, trees and tags, too, 2006-12-14).
They were originally added since we'd clobber rev.pending in the
loop without restoring it. Since the preceding commit we are
restoring it when we handle OBJ_COMMIT, so the main for-loop can
refer to "rev.pending" didrectly.
* We use the "memcpy a &blank" idiom introduced in
5726a6b4012 (*.c *_init(): define in terms of corresponding *_INIT
macro, 2021-07-01).
This is more obvious than relying on us enumerating all of the
relevant members of the "struct object_array" that we need to
clear.
* We comment on why we don't need an object_array_clear() here, see
the analysis in [1].
1. https://lore.kernel.org/git/YuQtJ2DxNKX%2Fy70N@coredump.intra.peff.net/
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Fix a memory leak in code added in 5d7eeee2ac6 (git-show: grok blobs,
trees and tags, too, 2006-12-14). As we iterate over a "<revision>..."
command-line and encounter ad OBJ_COMMIT we want to use our "struct
rev_info", but with a "pending" array of one element: the one commit
we're showing in the loop.
To do this 5d7eeee2ac6 saved away a pointer to rev.pending.objects and
rev.pending.nr for its iteration. We'd then clobber those (and alloc)
when we needed to show an OBJ_COMMIT.
We'd therefore leak the "rev.pending" we started out with, and only
free the new "rev.pending" in the "OBJ_COMMIT" case arm as
prepare_revision_walk() would draw it down.
Let's fix this memory leak. Now when we encounter an OBJ_COMMIT we
save away the "rev.pending" before clearing it. We then add a single
commit to it, which our indirect invocation of prepare_revision_walk()
will remove. After that we restore the "rev.pending".
Our "rev.pending" will then get free'd by the release_revisions()
added in f6bfea0ad01 (revisions API users: use release_revisions() in
builtin/log.c, 2022-04-13)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Fix a bug in 0139c58ab95 (revisions API users: add "goto cleanup" for
release_revisions(), 2022-04-13), in that commit a release_revisions()
call was added to this function, but it never did anything due to this
TODO memset() added in fe1a21d5267 (fast-rebase: demonstrate
merge-ort's API via new test-tool command, 2020-10-29).
Simply removing the memset() will fix the "cmdline" which can be seen
when running t5520-pull.sh.
This sort of thing could be detected automatically with a rule similar
to the unused.cocci merged in 7fa60d2a5b6 (Merge branch
'ab/cocci-unused' into next, 2022-07-11). The following rule on top
would catch the case being fixed here:
@@
type T;
identifier I;
identifier REL1 =~ "^[a-z_]*_(release|reset|clear|free)$";
identifier REL2 =~ "^(release|clear|free)_[a-z_]*$";
@@
- memset(\( I \| &I \), 0, ...);
... when != \( I \| &I \)
(
\( REL1 \| REL2 \)( \( I \| &I \), ...);
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\( REL1 \| REL2 \)( \( &I \| I \) );
)
... when != \( I \| &I \)
That rule should arguably use only &I, not I (as we might be passed a
pointer). The distinction would matter if anyone cared about the
side-effects of a memset() followed by release() of a pointer to a
variable passed into the function.
As such a pattern would be at best very confusing, and most likely
point to buggy code as in this case, the above rule is probably fine
as-is.
But as this rule only found one such bug in the entire codebase let's
not add it to contrib/coccinelle/unused.cocci for now, we can always
dig it up in the future if it's deemed useful.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a missing "goto cleanup", this fixes a bug in
f196c1e908d (revisions API users: use release_revisions() needing
REV_INFO_INIT, 2022-04-13).
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are some inconsistencies with how different asciidoc environments
handle different combinations of "\{<>}", e.g. these results were
observed with asciidoc on two different environments:
| Input | Output (env A) | Output (env B) | same/different |
|-----------+----------------+------------------+----------------|
| \{<foo>\} | {<foo>} | \{<foo>}^M | different |
| {<foo>} | {<foo>} | {<foo>} | same |
| \{<foo>} | {<foo>} | \{<foo>}^M | different |
| \{foo\} | {foo} | {foo} | same |
| \{\} | {} | \{}^M | different |
| \{} | {} | {} | same |
| {\} | {} | {} | same |
The only instance of this biting us is "@\{<specifier>\}" in
Documentation/git-reflog.txt; all other combinations of "\{<>}" (e.g. in
Documentation/revisions.txt) seem to render consistently.
Fix this inconsistent rendering by removing the unnecessary "\" in
Documentation/git-reflog.txt.
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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You can feed absolute garbage to symbolic-ref as a target like:
git symbolic-ref HEAD refs/heads/foo..bar
While this doesn't technically break the repo entirely (our "is it a git
directory" detector looks only for "refs/" at the start), we would never
resolve such a ref, as the ".." is invalid within a refname.
Let's flag these as invalid at creation time to help the caller realize
that what they're asking for is bogus.
A few notes:
- We use REFNAME_ALLOW_ONELEVEL here, which lets:
git update-ref refs/heads/foo FETCH_HEAD
continue to work. It's unclear whether anybody wants to do something
so odd, but it does work now, so this is erring on the conservative
side. There's a test to make sure we didn't accidentally break this,
but don't take that test as an endorsement that it's a good idea, or
something we might not change in the future.
- The test in t4202-log.sh checks how we handle such an invalid ref on
the reading side, so it has to be updated to touch the HEAD file
directly.
- We need to keep our HEAD-specific check for "does it start with
refs/". The ALLOW_ONELEVEL flag means we won't be enforcing that for
other refs, but HEAD is special here because of the checks in
validate_headref().
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In-code comment clarification.
source: <6a14443c101fa132498297af6d7a483520688d75.1658488203.git.matheus.bernardino@usp.br>
* mt/pkt-line-comment-tweak:
pkt-line.h: move comment closer to the associated code
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"git checkout" miscounted the paths it updated, which has been
corrected.
source: <cover.1657799213.git.matheus.bernardino@usp.br>
* mt/checkout-count-fix:
checkout: fix two bugs on the final count of updated entries
checkout: show bug about failed entries being included in final report
checkout: document bug where delayed checkout counts entries twice
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"rerere-train" script (in contrib/) used to honor commit.gpgSign
while recreating the throw-away merges.
source: <PH7PR14MB5594A27B9295E95ACA4D6A69CE8F9@PH7PR14MB5594.namprd14.prod.outlook.com>
* cl/rerere-train-with-no-sign:
contrib/rerere-train: avoid useless gpg sign in training
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"git rebase -i" learns to update branches whose tip appear in the
rebased range with "--update-refs" option.
source: <pull.1247.v5.git.1658255624.gitgitgadget@gmail.com>
* ds/rebase-update-ref:
sequencer: notify user of --update-refs activity
sequencer: ignore HEAD ref under --update-refs
rebase: add rebase.updateRefs config option
sequencer: rewrite update-refs as user edits todo list
rebase: update refs from 'update-ref' commands
rebase: add --update-refs option
sequencer: add update-ref command
sequencer: define array with enum values
rebase-interactive: update 'merge' description
branch: consider refs under 'update-refs'
t2407: test branches currently using apply backend
t2407: test bisect and rebase as black-boxes
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"git p4" did not handle non-ASCII client name well, which has been
corrected.
source: <pull.1285.v3.git.git.1658394440.gitgitgadget@gmail.com>
* kk/p4-client-name-encoding-fix:
git-p4: refactoring of p4CmdList()
git-p4: fix bug with encoding of p4 client name
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In 557ac0350d9 (merge-ort: begin performance work; instrument with
trace2_region_* calls, 2021-01-23), we added Trace2 instrumentation, but
in the error path that returns early, we forgot to tell Trace2 that
we're leaving the region. Let's fix that.
Pointed-out-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In 9fefce68dc8 (merge-ort: basic outline for merge_switch_to_result(),
2020-12-13), we added functionality to lay down the result of a merge on
disk. But we forgot to release the data structures in case
`unpack_trees()` failed to run properly.
This was pointed out by the `linux-leaks` job in our CI runs.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Versions of gcc prior to 4.9 complain about an initialization like:
struct inner { int x; };
struct outer { struct inner; };
struct outer foo = { 0 };
and insist on:
struct outer foo = { { 0 } };
Newer compilers handle this just fine. And ignoring the window even on
older compilers is fine; the resulting code is correct, but we just get
caught by -Werror.
Let's relax this for older compilers to make developer lives easier (we
don't care much about non-developers on old compilers; they may see a
warning, but it won't stop compilation).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Files' attributes can indicate more than just whether they are files or
directories. It was reported in Git for Windows that on certain network
shares, this led to a nasty problem trying to create tags:
$ git tag -a -m "automatic tag creation" test_dir/test_tag
fatal: cannot lock ref 'refs/tags/test_dir/test_tag': unable to resolve reference 'refs/tags/test_dir/test_tag': Not a directory
Note: This does not necessarily happen with all types of network shares.
One setup where it _did_ happen is a Windows Server 2019 VM, and as
hinted in
http://woshub.com/slow-network-shared-folder-refresh-windows-server/
in the indicated instance the following commands worked around the bug:
Set-SmbClientConfiguration -DirectoryCacheLifetime 0
Set-SmbClientConfiguration -FileInfoCacheLifetime 0
Set-SmbClientConfiguration -FileNotFoundCacheLifetime 0
This would impact performance negatively, though, as it essentially
turns off all caching, therefore we do not want to require users to do
that just to be able to use Git on Windows.
The underlying bug is in the code added in 4b0abd5c695 (mingw: let
lstat() fail with errno == ENOTDIR when appropriate, 2016-01-26) that
emulates the POSIX behavior where `lstat()` should return `ENOENT` if
the file or directory simply does not exist but could be created, and
`ENOTDIR` if there is no file or directory nor could there be because a
leading path already exists and is not a directory.
In that code, the return value of `GetFileAttributesW()` is interpreted
as an enum value, not as a bit field, so that a perfectly fine leading
directory can be misdetected as "not a directory".
As a consequence, the `read_refs_internal()` function would return
`ENOTDIR`, suggesting not only that the tag in the `git tag` invocation
above does not exist, but that it cannot even be created.
Let's fix the code so that it interprets the return value of the
`GetFileAttributesW()` call correctly.
This fixes https://github.com/git-for-windows/git/issues/3727
Reported-by: Pierre Garnier <pgarnier@mega.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In df5218b4c30 (config.mak.uname: support MSys2, 2016-01-13), we
introduced support for building Git for Windows in the then-brand new
Git for Windows v2.x build environment that was based off of MSYS2.
To do that, we split the non-msysGit part (that targeted MSys1) in two,
and instead of sharing the `NO_CURL = YesPlease` setting with MSys1, we
overrode it for MSYS2 with the empty value because we very much want to
build Git for Windows with libcurl.
But that was unnecessary: we never set that variable beforehand,
therefore there is no need to override it.
Let's just remove that unnecessary line.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In f9206ce2681 (mingw: let's use gettext with MSYS2, 2016-01-26), we
flipped the switch to build Git for Windows with support for gettext.
However, the way we flipped the switch was by changing the value of the
`NO_GETTEXT` variable from a non-empty string to the empty string, as if
there was any `NO_GETTEXT` definition we needed to override.
But that was a mistake: while there _is_ a definition, it is in the
`THIS_IS_MSYSGIT` section, i.e. it does not affect the Git for Windows
part at all.
Let's just remove that unnecessary line.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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While Git for Windows does not _ship_ Python (in order to save on
bandwidth), MSYS2 provides very fine Python interpreters that users can
easily take advantage of, by using Git for Windows within its SDK.
Previously, we excluded the Python bits, mostly due to historical
reasons: In the Git for Windows v1.x days, we built Git using
MSys/MinGW, without support for any Python scripts.
Therefore, let's move out the `NO_PYTHON` definition from the generic
part of the MINGW section (which includes special handling for MSYS2/Git
for Windows, for the long-superseded msysGit environment, as well as for
the setup of probably just one developer remaining with their MSys1)
into the two sections that cover different environments than Git for
Windows' SDK.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The `test_cmp` function is meant to provide nicer output than `cmp` when
expected and actual output of Git commands disagree. The implicit
assumption is that the output is line-based and human readable.
However, aaf81223f48 (unpack-objects: use stream_loose_object() to
unpack large objects, 2022-06-11) introduced a call that compares the
contents of pack files, which are distinctly not line-based nor human
readable.
This causes problems because on Windows, we hand off to the Bash
function `mingw_test_cmp` that compares the lines while ignoring line
ending differences. And this Bash function spends an insane amount of
cycles trying to read in that binary pack file, so that it is almost
indistinguishable from an infinite loop.
For example, t5351 took 1486 seconds in the CI run at
https://github.com/git/git/runs/7398490747?check_suite_focus=true#step:5:171,
to complete. And yes, that is almost half an hour.
Since Git's tests already use `cmp` consistently when comparing pack
files, let's change this instance to use `cmp` instead of `test_cmp`,
too, and fix that performance problem.
Now t5351 takes all of 22 seconds.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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On FreeBSD, this mode is not supported. But since 3a251bac0d1a (trace2:
only include "fsync" events if we git_fsync(), 2022-07-18) t5351 will
fail if this mode is unsupported.
Let's address this in the minimal fashion, by detecting that that mode
is unsupported and expecting a different count of hardware flushes in
that case.
This fixes the CI/PR builds on FreeBSD again.
Note: A better way would be to test only what is relevant in t5351.6
"unpack big object in stream (core.fsyncmethod=batch)" again instead of
blindly comparing the output against some exact text. But that would
pretty much revert the idea of above-mentioned commit, and that commit
was _just_ accepted into Git's main branch so one must assume that it
was intentional.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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As noted in a preceding commit the leak checking done by
"GIT_TEST_PASSING_SANITIZE_LEAK=true" (added in [1]) is incomplete
without combining it with "GIT_TEST_SANITIZE_LEAK_LOG=true".
Let's run our CI with that, to ensure that we catch cases where our
tests are missing the abort() exit code resulting from a leak for
whatever reason. The reasons for that are discussed in detail in a
preceding commit.
1. 956d2e4639b (tests: add a test mode for SANITIZE=leak, run it in
CI, 2021-09-23)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Fix a memory leak that's been reported by some versions of "gcc" since
"output_state" became malloc'd in 55a9651d26a (upload-pack.c: increase
output buffer size, 2021-12-14).
In e75d2f7f734 (revisions API: have release_revisions() release
"filter", 2022-04-13) it was correctly marked as leak-free, the only
path through this function that doesn't reach the free(output_state)
is if we "goto fail", and that will invoke "die()".
Such leaks are not included with SANITIZE=leak (but e.g. valgrind will
still report them), but under some gcc optimization (I have not been
able to reproduce it with "clang") we'll report a leak here
anyway. E.g. gcc v12 with "-O2" and above will trigger it, but not
clang v13 with any "-On".
The GitHub CI would also run into this leak if the "linux-leaks" job
was made to run with "GIT_TEST_SANITIZE_LEAK_LOG=true".
See [1] for a past case where gcc had similar trouble analyzing leaks
involving a die() invocation in the function.
1. https://lore.kernel.org/git/patch-v3-5.6-9a44204c4c9-20211022T175227Z-avarab@gmail.com/
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Mark those remaining tests that pass when run under SANITIZE=leak with
TEST_PASSES_SANITIZE_LEAK=true, these were either omitted in
f346fcb62a0 (Merge branch 'ab/mark-leak-free-tests-even-more',
2021-12-15) and 5a4f8381b68 (Merge branch 'ab/mark-leak-free-tests',
2021-10-25), or have had their memory leaks fixed since then.
With this change there's now a a one-to-one mapping between those
tests that we have opted-in via "TEST_PASSES_SANITIZE_LEAK=true", and
those that pass with the new "check" mode:
GIT_TEST_PASSING_SANITIZE_LEAK=check \
GIT_TEST_SANITIZE_LEAK_LOG=true \
make test SANITIZE=leak
Note that the "GIT_TEST_SANITIZE_LEAK_LOG=true" is needed due to the
edge cases noted in a preceding commit, i.e. in some cases we'd pass
the test itself, but still have outstanding leaks due to ignored exit
codes.
The "GIT_TEST_SANITIZE_LEAK_LOG=true" corrects for that, we're only
marking those tests as passing that really don't have any leaks,
whether that was reflected in their exit code or not.
Note that the change here to "t9100-git-svn-basic.sh" is marking that
test as passing under SANITIZE=leak, we're removing a
"TEST_FAILS_SANITIZE_LEAK=true" line, not
"TEST_PASSES_SANITIZE_LEAK=true". See 7a98d9ab00d (revisions API: have
release_revisions() release "cmdline", 2022-04-13) for the
introduction of that t/lib-git-svn.sh-specific variable.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The '!SANITIZE_LEAK' prerequisite added in 956d2e4639b (tests: add a
test mode for SANITIZE=leak, run it in CI, 2021-09-23) has been used
in various tests to skip individual tests in otherwise leak-free
tests.
Let's change the cases that have become leak-free since then to run
under SANITIZE=leak.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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As noted in previous on-list discussions[1] we have various tests that
will falsely report being leak-free because we're missing the relevant
exit code from LSAN as summarized below.
We should fix those issues, but in the meantime and as an additional
sanity check we can and should consider our own ASAN logs before
reporting that a test is leak-free.
Before this compiling with SANITIZE=leak and running:
./t6407-merge-binary.sh
Will exit successfully, now we'll get an error and an informative
message on:
GIT_TEST_SANITIZE_LEAK_LOG=true ./t6407-merge-binary.sh
Even better, as noted in the updated t/README we'll now error out when
combined with the "check" mode:
GIT_TEST_PASSING_SANITIZE_LEAK=check \
GIT_TEST_SANITIZE_LEAK_LOG=true \
./t4058-diff-duplicates.sh
Why do we miss these leaks? Because:
* We have leaks inside "test_expect_failure" blocks, which by design
will not distinguish a "normal" failure from an abort() or
segfault. See [1] for a discussion of it shortcomings.
* We have "git" invocations outside of "test_expect_success",
e.g. setup code in the main body of the test, or in test helper
functions that don't use &&-chaining.
* Our tests will otherwise catch segfaults and abort(), but if we
invoke a command that invokes another command it needs to ferry the
exit code up to us.
Notably a command that e.g. might invoke "git pack-objects" might
itself exit with status 128 if that "pack-objects" segfaults or
abort()'s. If the test invoking the parent command(s) is using
"test_must_fail" we'll consider it an expected "ok" failure.
* run-command.c doesn't (but probably should) ferry up such exit
codes, so for e.g. "git push" tests where we expect a failure and an
underlying "git" command fails we won't ferry up the segfault or
abort exit code.
* We have gitweb.perl and some other perl code ignoring return values
from close(), i.e. ignoring exit codes from "git rev-parse" et al.
* We have in-tree shellscripts like "git-merge-one-file.sh" invoking
git commands, they'll usually return their own exit codes on "git"
failure, rather then ferrying up segfault or abort() exit code.
E.g. these invocations in git-merge-one-file.sh leak, but aren't
reflected in the "git merge" exit code:
src1=$(git unpack-file $2)
src2=$(git unpack-file $3)
That case would be easily "fixed" by adding a line like this after
each assignment:
test $? -ne 0 && exit $?
But we'd then in e.g. "t6407-merge-binary.sh" run into
write_tree_trivial() in "builtin/merge.c" calling die() instead of
ferrying up the relevant exit code.
Let's remove "TEST_PASSES_SANITIZE_LEAK=true" from tests we
were falsely marking as leak-free.
In the case of t6407-merge-binary.sh it was marked as leak-free in
9081a421a6d (checkout: fix "branch info" memory leaks,
2021-11-16). I'd previously removed other bad
"TEST_PASSES_SANITIZE_LEAK=true" opt-ins in the series merged in
ea05fd5fbf7 (Merge branch 'ab/keep-git-exit-codes-in-tests',
2022-03-16). The case of t1060-object-corruption.sh is more subtle,
and will be discussed in a subsequent commit.
1. https://lore.kernel.org/git/cover-0.7-00000000000-20220318T002951Z-avarab@gmail.com/
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a new "GIT_TEST_PASSING_SANITIZE_LEAK=check" mode to the
test-lib.sh.
As noted in the updated "t/README" this compliments the existing
"GIT_TEST_PASSING_SANITIZE_LEAK=true" mode added in
956d2e4639b (tests: add a test mode for SANITIZE=leak, run it in CI,
2021-09-23).
Rather than document this all in one (even more) dense paragraph split
up the discussion of how it combines with --immediate into its own
paragraph following the discussion of
"GIT_TEST_SANITIZE_LEAK_LOG=true".
Before the removal of "test_external" in a preceding commit we would
have had to special-case t9700-perl-git.sh and t0202-gettext-perl.sh.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Remove the "test_external" function added in [1]. This arguably makes
the output of t9700-perl-git.sh and friends worse. But as we'll argue
below the trade-off is worth it, since "chaining" to another TAP
emitter in test-lib.sh is more trouble than it's worth.
The new output of t9700-perl-git.sh is now:
$ ./t9700-perl-git.sh
ok 1 - set up test repository
ok 2 - use t9700/test.pl to test Git.pm
# passed all 2 test(s)
1..2
Whereas before this change it would be:
$ ./t9700-perl-git.sh
ok 1 - set up test repository
# run 1: Perl API (perl /home/avar/g/git/t/t9700/test.pl)
ok 2 - use Git;
[... omitting tests 3..46 from t/t9700/test.pl ...]
ok 47 - unquote escape sequences
1..47
# test_external test Perl API was ok
# test_external_without_stderr test no stderr: Perl API was ok
At the time of its addition supporting "test_external" was easy, but
when test-lib.sh itself started to emit TAP in [2] we needed to make
everything surrounding the emission of the plan consider
"test_external". I added that support in [2] so that we could run:
prove ./t9700-perl-git.sh :: -v
But since then in [3] the door has been closed on combining
$HARNESS_ACTIVE and -v, we'll now just die:
$ prove ./t9700-perl-git.sh :: -v
Bailout called. Further testing stopped: verbose mode forbidden under TAP harness; try --verbose-log
FAILED--Further testing stopped: verbose mode forbidden under TAP harness; try --verbose-log
So the only use of this has been that *if* we had failure in one of
these tests we could e.g. in CI see which test failed based on the
test number. Now we'll need to look at the full verbose logs to get
that same information.
I think this trade-off is acceptable given the reduction in
complexity, and it brings these tests in line with other similar
tests, e.g. the reftable tests added in [4] will be condensed down to
just one test, which invokes the C helper:
$ ./t0032-reftable-unittest.sh
ok 1 - unittests
# passed all 1 test(s)
1..1
It would still be nice to have that ":: -v" form work again, it
never *really* worked, but even though we've had edge cases test
output screwing up the TAP it mostly worked between d998bd4ab67 and
[3], so we may have been overzealous in forbidding it outright.
I have local patches which I'm planning to submit sooner than later
that get us to that goal, and in a way that isn't buggy. In the
meantime getting rid of this special case makes hacking on this area
of test-lib.sh easier, as we'll do in subsequent commits.
The switch from "perl" to "$PERL_PATH" here is because "perl" is
defined as a shell function in the test suite, see a5bf824f3b4 (t:
prevent '-x' tracing from interfering with test helpers' stderr,
2018-02-25). On e.g. the OSX CI the "command perl"... will be part of
the emitted stderr.
1. fb32c410087 (t/test-lib.sh: add test_external and
test_external_without_stderr, 2008-06-19)
2. d998bd4ab67 (test-lib: Make the test_external_* functions
TAP-aware, 2010-06-24)
3. 614fe015212 (test-lib: bail out when "-v" used under
"prove", 2016-10-22)
4. ef8a6c62687 (reftable: utility functions, 2021-10-07)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Since the original "perl -MTest::More" prerequisite check was added in
[1] it's been copy/pasted in [2], [3] and [4]. As we'll be changing
these codepaths in a subsequent commit let's consolidate these.
While we're at it let's move these to a lazy prereq, and make them
conform to our usual coding style (e.g. "\nthen", not "; then").
1. e46f9c8161a (t9700: skip when Test::More is not available,
2008-06-29)
2. 5e9637c6297 (i18n: add infrastructure for translating Git with
gettext, 2011-11-18)
3. 8d314d7afec (send-email: reduce dependencies impact on
parse_address_line, 2015-07-07)
4. f07eeed123b (git-credential-netrc: adapt to test framework for git,
2018-05-12)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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