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* maint-2.18:
Git 2.18.5
Git 2.17.6
unpack_trees(): start with a fresh lstat cache
run-command: invalidate lstat cache after a command finished
checkout: fix bug that makes checkout follow symlinks in leading path
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Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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* maint-2.17:
Git 2.17.6
unpack_trees(): start with a fresh lstat cache
run-command: invalidate lstat cache after a command finished
checkout: fix bug that makes checkout follow symlinks in leading path
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Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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We really want to avoid relying on stale information.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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In the previous commit, we intercepted calls to `rmdir()` to invalidate
the lstat cache in the successful case, so that the lstat cache could
not have the idea that a directory exists where there is none.
The same situation can arise, of course, when a separate process is
spawned (most notably, this is the case in `submodule_move_head()`).
Obviously, we cannot know whether a directory was removed in that
process, therefore we must invalidate the lstat cache afterwards.
Note: in contrast to `lstat_cache_aware_rmdir()`, we invalidate the
lstat cache even in case of an error: the process might have removed a
directory and still have failed afterwards.
Co-authored-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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Before checking out a file, we have to confirm that all of its leading
components are real existing directories. And to reduce the number of
lstat() calls in this process, we cache the last leading path known to
contain only directories. However, when a path collision occurs (e.g.
when checking out case-sensitive files in case-insensitive file
systems), a cached path might have its file type changed on disk,
leaving the cache on an invalid state. Normally, this doesn't bring
any bad consequences as we usually check out files in index order, and
therefore, by the time the cached path becomes outdated, we no longer
need it anyway (because all files in that directory would have already
been written).
But, there are some users of the checkout machinery that do not always
follow the index order. In particular: checkout-index writes the paths
in the same order that they appear on the CLI (or stdin); and the
delayed checkout feature -- used when a long-running filter process
replies with "status=delayed" -- postpones the checkout of some entries,
thus modifying the checkout order.
When we have to check out an out-of-order entry and the lstat() cache is
invalid (due to a previous path collision), checkout_entry() may end up
using the invalid data and thrusting that the leading components are
real directories when, in reality, they are not. In the best case
scenario, where the directory was replaced by a regular file, the user
will get an error: "fatal: unable to create file 'foo/bar': Not a
directory". But if the directory was replaced by a symlink, checkout
could actually end up following the symlink and writing the file at a
wrong place, even outside the repository. Since delayed checkout is
affected by this bug, it could be used by an attacker to write
arbitrary files during the clone of a maliciously crafted repository.
Some candidate solutions considered were to disable the lstat() cache
during unordered checkouts or sort the entries before passing them to
the checkout machinery. But both ideas include some performance penalty
and they don't future-proof the code against new unordered use cases.
Instead, we now manually reset the lstat cache whenever we successfully
remove a directory. Note: We are not even checking whether the directory
was the same as the lstat cache points to because we might face a
scenario where the paths refer to the same location but differ due to
case folding, precomposed UTF-8 issues, or the presence of `..`
components in the path. Two regression tests, with case-collisions and
utf8-collisions, are also added for both checkout-index and delayed
checkout.
Note: to make the previously mentioned clone attack unfeasible, it would
be sufficient to reset the lstat cache only after the remove_subtree()
call inside checkout_entry(). This is the place where we would remove a
directory whose path collides with the path of another entry that we are
currently trying to check out (possibly a symlink). However, in the
interest of a thorough fix that does not leave Git open to
similar-but-not-identical attack vectors, we decided to intercept
all `rmdir()` calls in one fell swoop.
This addresses CVE-2021-21300.
Co-authored-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
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The "ort" merge strategy.
* en/merge-ort-perf:
merge-ort: begin performance work; instrument with trace2_region_* calls
merge-ort: ignore the directory rename split conflict for now
merge-ort: fix massive leak
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ORT merge strategy learns to infer "renamed directory" while
merging.
* en/ort-directory-rename:
merge-ort: fix a directory rename detection bug
merge-ort: process_renames() now needs more defensiveness
merge-ort: implement apply_directory_rename_modifications()
merge-ort: add a new toplevel_dir field
merge-ort: implement handle_path_level_conflicts()
merge-ort: implement check_for_directory_rename()
merge-ort: implement apply_dir_rename() and check_dir_renamed()
merge-ort: implement compute_collisions()
merge-ort: modify collect_renames() for directory rename handling
merge-ort: implement handle_directory_level_conflicts()
merge-ort: implement compute_rename_counts()
merge-ort: copy get_renamed_dir_portion() from merge-recursive.c
merge-ort: add outline of get_provisional_directory_renames()
merge-ort: add outline for computing directory renames
merge-ort: collect which directories are removed in dirs_removed
merge-ort: initialize and free new directory rename data structures
merge-ort: add new data structures for directory rename detection
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* tb/ci-run-cocci-with-18.04:
.github/workflows/main.yml: run static-analysis on bionic
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Currently invalid boolean config values return messages about 'bad
numeric', which is slightly misleading when the error was due to a
boolean value. We can improve the developer experience by returning a
boolean error message when we know the value is neither a bool text or
int.
before with an invalid boolean value of `non-boolean`, its unclear what
numeric is referring to:
fatal: bad numeric config value 'non-boolean' for 'commit.gpgsign': invalid unit
now the error message mentions `non-boolean` is a bad boolean value:
fatal: bad boolean config value 'non-boolean' for 'commit.gpgsign'
Signed-off-by: Andrew Klotz <agc.klotz@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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According to Documentation/CodingGuidelines, we should use "test"
rather than "[ ... ]" in shell scripts, so let's replace the
"[ ... ]" with "test" in the t7001 test script.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change from old style to current style by taking advantage of
here-docs instead of echo commands.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Modern practice is to avoid multiple commands per line, and
instead place each command on its own line.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Use `>` rather than `touch` to create an empty file when the
timestamp isn't relevant to the test.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Avoid using `cd` outside of subshells since, if the test fails,
there is no guarantee that the current working directory is the
expected one, which may cause subsequent tests to run in the wrong
directory.
While at it, make some other tests more concise by replacing
simple subshells with `git -C`.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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According to Documentation/CodingGuidelines, there should be no
whitespace after redirect operators. So, we should remove these
whitespaces after redirect operators.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Some test use an old style for formatting subshells:
(command &&
...
Update them to the modern style:
(
command &&
...
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Some tests use a deprecated style in which there are unnecessary
blank lines after the opening quote of the test body and before the
closing quote. So we should remove these unnecessary blank lines.
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Some tests in this script are formatted using a very old style:
test_expect_success \
'title' \
'body line 1 &&
body line 2'
Update the formatting to the modern style:
test_expect_success 'title' '
body line 1 &&
body line 2
'
Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Save sizeof(const char *) bytes by declaring ref_stash as an array
instead of having a redundant pointer to an array.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Modernize the script by doing file content comparisons using test_cmp()
instead of `test x = "$(cat file)"`.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In order to modernize the test script, replace `test -s` with
test_file_not_empty(), which provides better diagnostic output in the
case of failure.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If a git command in a nested command substitution fails, it will be
silently ignored since only the return code of the outer command
substitutions is reported. Factor out nested command substitutions so
that the error codes of those commands are reported.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In order to modernize the tests, move commands that currently run
outside of test cases into a test case. Where possible, clean up files
that are produced using test_when_finished() but in the case where files
persist over multiple test cases, create a new test case to perform
cleanup.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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For shell scripts, the usual convention is for there to be no space
after redirection operators, (e.g. `>file`, not `> file`). Remove these
spaces wherever they appear.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Currently, the options for the `list` and `show` subcommands are just
listed as `<options>`. This seems to imply, from a cursory glance at the
summary, that they take the stash options listed below. However, reading
more carefully, we see that they take log options and diff options
respectively.
Make it more obvious that they take log and diff options by explicitly
stating this in the subcommand summary.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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It can sometimes be useful to see which refs are contributing to the
overall repository size (e.g., does some branch have a bunch of objects
not found elsewhere in history, which indicates that deleting it would
shrink the size of a clone).
You can find that out by generating a list of objects, getting their
sizes from cat-file, and then summing them, like:
git rev-list --objects --no-object-names main..branch
git cat-file --batch-check='%(objectsize:disk)' |
perl -lne '$total += $_; END { print $total }'
Though note that the caveats from git-cat-file(1) apply here. We "blame"
base objects more than their deltas, even though the relationship could
easily be flipped. Still, it can be a useful rough measure.
But one problem is that it's slow to run. Teaching rev-list to sum up
the sizes can be much faster for two reasons:
1. It skips all of the piping of object names and sizes.
2. If bitmaps are in use, for objects that are in the
bitmapped packfile we can skip the oid_object_info()
lookup entirely, and just ask the revindex for the
on-disk size.
This patch implements a --disk-usage option which produces the same
answer in a fraction of the time. Here are some timings using a clone of
torvalds/linux:
[rev-list piped to cat-file, no bitmaps]
$ time git rev-list --objects --no-object-names --all |
git cat-file --buffer --batch-check='%(objectsize:disk)' |
perl -lne '$total += $_; END { print $total }'
1459938510
real 0m29.635s
user 0m38.003s
sys 0m1.093s
[internal, no bitmaps]
$ time git rev-list --disk-usage --objects --all
1459938510
real 0m31.262s
user 0m30.885s
sys 0m0.376s
Even though the wall-clock time is slightly worse due to parallelism,
notice the CPU savings between the two. We saved 21% of the CPU just by
avoiding the pipes.
But the real win is with bitmaps. If we use them without the new option:
[rev-list piped to cat-file, bitmaps]
$ time git rev-list --objects --no-object-names --all --use-bitmap-index |
git cat-file --batch-check='%(objectsize:disk)' |
perl -lne '$total += $_; END { print $total }'
1459938510
real 0m6.244s
user 0m8.452s
sys 0m0.311s
then we're faster to generate the list of objects, but we still spend a
lot of time piping and looking things up. But if we do both together:
[internal, bitmaps]
$ time git rev-list --disk-usage --objects --all --use-bitmap-index
1459938510
real 0m0.219s
user 0m0.169s
sys 0m0.049s
then we get the same answer much faster.
For "--all", that answer will correspond closely to "du objects/pack",
of course. But we're actually checking reachability here, so we're still
fast when we ask for more interesting things:
$ time git rev-list --disk-usage --use-bitmap-index v5.0..v5.10
374798628
real 0m0.429s
user 0m0.356s
sys 0m0.072s
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When `gc.writeCommitGraph = true`, it is possible that the commit-graph
is _still_ not written: replace objects, grafts and shallow repositories
are incompatible with the commit-graph feature.
Under such circumstances, we need to indicate to the user why the
commit-graph was not written instead of staying silent about it.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Acked-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Whenever a user runs `git reflog expire --stale-fix`, the most likely
reason is that their repository is at least _somewhat_ corrupt. Which
means that it is more than just possible that some objects are missing.
If that is the case, that can currently let the command abort through
the phase where it tries to mark all reachable objects.
Instead of adding insult to injury, let's be gentle and continue as best
as we can in such a scenario, simply by ignoring the missing objects and
moving on.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Fix a memory leak in 296d4a94e7 (diff: add -I<regex> that ignores
matching changes, 2020-10-20) by freeing the memory it allocates in
the newly introduced diff_free(). See the previous commit for details
on that.
This memory leak was intentionally introduced in 296d4a94e7, see the
discussion on a previous iteration of it in
https://lore.kernel.org/git/xmqqeelycajx.fsf@gitster.c.googlers.com/
At that time freeing the memory was somewhat tedious, but since it
isn't anymore with the newly introduced diff_free() let's use it.
Let's retain the pattern for diff_free_file() and add a
diff_free_ignore_regex(), even though (unlike "diff_free_file") we
don't need to call it elsewhere. I think this'll make for more
readable code than gradually accumulating a giant diff_free()
function, sharing "int i" across unrelated code etc.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a diff_free() function to free anything we may have allocated in
the "diff_options" struct, and the ability to make calling it a noop
by setting "no_free" in "diff_options".
This is required because when e.g. "git diff" is run we'll allocate
things in that struct, use the diff machinery once, and then exit.
But if we run e.g. "git log -p" we're going to re-use what we
allocated across multiple diff_flush() calls, and only want to free
things at the end.
We've thus ended up with features like the recently added "diff -I"[1]
where we'll leak memory. As it turns out it could have simply used the
pattern established in 6ea57703f6 (log: prepare log/log-tree to reuse
the diffopt.close_file attribute, 2016-06-22).
Manually adding more such flags to things log_tree_commit() every time
we need to allocate something would be tedious. Let's instead move
that fclose() code it to a new diff_free(), in anticipation of freeing
more things in that function in follow-up commits.
Some functions such as log_tree_commit() need an idiom of optionally
retaining a previous "no_free", as they may either free the memory
themselves, or their caller may do so. I'm keeping that idiom in
log_show_early() for good measure, even though I don't think it's
currently called in this manner. It also gets passed an existing
"struct rev_info", so future callers may want to set the "no_free"
flag.
This change is a bit hard to read because while the freeing pattern
we're introducing isn't unusual, the "file" member is a special
snowflake. We usually don't want to fclose() it. This is because
"file" is usually stdout, in which case we don't want to fclose()
it. We only want to opt-in to closing it when we e.g. open a file on
the filesystem. Thus the opt-in "close_file" flag.
So the API in general just needs a "no_free" flag to defer freeing,
but the "file" member still needs its "close_file" flag. This is made
more confusing because while refactoring this code we could replace
some "close_file=0" with "no_free=1", whereas others need to set both
flags.
This is because there were some cases where an existing "close_file=0"
meant "let's defer deallocation", and others where it meant "we don't
want to close this file handle at all".
1. 296d4a94e7 (diff: add -I<regex> that ignores matching changes,
2020-10-20)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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As a follow-up to d162b25f956 (tests: remove support for
GIT_TEST_GETTEXT_POISON, 2021-01-20) remove most uses of test_i18ncmp
via a simple s/test_i18ncmp/test_cmp/g search-replacement.
I'm leaving t6300-for-each-ref.sh out due to a conflict with in-flight
changes between "master" and "seen", as well as the prerequisite
itself due to other changes between "master" and "next/seen" which add
new test_i18ncmp uses.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Remove the last uses of the C_LOCALE_OUTPUT prerequisite as well as
the prerequisite itself. This is a follow-up to d162b25f956 (tests:
remove support for GIT_TEST_GETTEXT_POISON, 2021-01-20), as well as
the preceding commit where we removed the simpler uses of
C_LOCALE_OUTPUT.
Here I'm slightly refactoring a test added in 21e5ad50fc5 (safecrlf:
Add mechanism to warn about irreversible crlf conversions,
2008-02-06), as well as getting rid of another "test_have_prereq
C_LOCALE_OUTPUT" use.
I'm not leaving the prerequisite itself in place for in-flight changes
as there currently are none that introduce new tests that rely on it,
and because C_LOCALE_OUTPUT is currently a noop on the master branch
we likely won't have any new submissions that use it.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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As a follow-up to d162b25f956 (tests: remove support for
GIT_TEST_GETTEXT_POISON, 2021-01-20) remove those uses of the now
always true C_LOCALE_OUTPUT prerequisite from those tests which
declare it as an argument to test_expect_{success,failure}.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Follow-up my 73c01d25fe2 (tests: remove uses of
GIT_TEST_GETTEXT_POISON=false, 2021-01-20) by removing the last uses
of GIT_TEST_GETTEXT_POISON=*.
These assignments were part of branch that was in-flight at the time
of the gettext poison removal. See 466f94ec45e (Merge branch
'ab/detox-gettext-tests', 2021-02-10) and c7d6d419b0d (Merge branch
'ab/mktag', 2021-01-25) for the merging of the two branches.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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`git help gc` contains this snippet:
"[...] it will keep [..] objects referenced by the index,
remote-tracking branches, notes saved by git notes under refs/notes/"
I had interpreted that as saying that the objects that notes were
attached to are kept, but that is not the case. Let's clarify the
documentation by moving out the part about git notes to a separate
sentence.
Signed-off-by: Martin von Zweigbergk <martinvonz@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we have a multiply signed commit, we need to remove the signature
in the header before verifying the object, since the trailing signature
will not be over both pieces of data. Do so, and verify that we
validate the signature appropriately.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we parse a signature in the ref-filter code, we continually
increment the buffer pointer. Hoist the signature parsing above the
blank line delimiting headers and body so we can find the signature when
using a header to sign the buffer.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Currently only commits are signed with headers. However, in the future,
we'll also sign tags with headers as well. Let's refactor out a
function called parse_buffer_signed_by_header which does exactly that.
In addition, since we'll want to sign things other than commits this
way, let's call the function sign_with_header instead of do_sign_commit.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We have a function which parses a buffer with a signature at the end,
parse_signature, and this function is used for signed tags. However,
we'll need to store values for multiple algorithms, and we'll do this by
using a header for the non-default algorithm.
Adjust the parse_signature interface to store the parsed data in two
strbufs and turn the existing function into parse_signed_buffer. The
latter is still used in places where we know we always have a signed
buffer, such as push certs.
Adjust all the callers to deal with this new interface.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The version of Ubuntu Linux used by default at GitHub Actions CI
has been updated to one that lack coccinelle; until it gets fixed,
work it around by sticking to the previous release (18.04).
* tb/ci-run-cocci-with-18.04:
.github/workflows/main.yml: run static-analysis on bionic
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Get rid of "GETTEXT_POISON" support altogether, which may or may
not be controversial.
* ab/detox-gettext-tests:
tests: remove uses of GIT_TEST_GETTEXT_POISON=false
tests: remove support for GIT_TEST_GETTEXT_POISON
ci: remove GETTEXT_POISON jobs
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Update support for invalid UTF-8 in PCRE2.
* ab/grep-pcre-invalid-utf8:
grep/pcre2: better support invalid UTF-8 haystacks
grep/pcre2 tests: don't rely on invalid UTF-8 data test
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The support for deprecated PCRE1 library has been dropped.
* ab/retire-pcre1:
Remove support for v1 of the PCRE library
config.mak.uname: remove redundant NO_LIBPCRE1_JIT flag
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Some pretty-format specifiers do not need the data in commit object
(e.g. "%H"), but we were over-eager to load and parse it, which has
been made even lazier.
* jk/pretty-lazy-load-commit:
pretty: lazy-load commit data when expanding user-format
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Cleaning various codepaths up.
* ds/more-index-cleanups:
t1092: test interesting sparse-checkout scenarios
test-lib: test_region looks for trace2 regions
sparse-checkout: load sparse-checkout patterns
name-hash: use trace2 regions for init
repository: add repo reference to index_state
fsmonitor: de-duplicate BUG()s around dirty bits
cache-tree: extract subtree_pos()
cache-tree: simplify verify_cache() prototype
cache-tree: clean up cache_tree_update()
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