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While most of the functions relating to `struct image` are relatively
close to one another, `fuzzy_matchlines()` sits in between those even
though it is rather unrelated.
Reorder functions such that `struct image`-related functions are next to
each other. While at it, move `clear_image()` to the top such that it is
close to the struct definition itself. This makes this lifecycle-related
thing easy to discover.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
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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Build fix.
* rj/compat-terminal-unused-fix:
compat/terminal: mark parameter of git_terminal_prompt() UNUSED
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Docfix.
* jc/config-doc-update:
git-config.1: fix description of --regexp in synopsis
git-config.1: --get-all description update
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Docfix.
* aa/cat-file-batch-output-doc:
docs: explain the order of output in the batched mode of git-cat-file(1)
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Docfix.
* cl/config-regexp-docfix:
doc: replace 3 dash with correct 2 dash in git-config(1)
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Write down whitespacing rules around C opeators.
* jc/coding-style-c-operator-with-spaces:
CodingGuidelines: spaces around C operators
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A corner case bug in "git stash" was fixed.
* ps/stash-keep-untrack-empty-fix:
builtin/stash: fix `--keep-index --include-untracked` with empty HEAD
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"git verify-pack" and "git index-pack" started dying outside a
repository, which has been corrected.
* ps/index-pack-outside-repo-fix:
builtin/index-pack: fix segfaults when running outside of a repo
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The code forgot to discard unnecessary in-core commit buffer data
for commits that "git log --skip=<number>" traversed but omitted
from the output, which has been corrected.
* jk/free-commit-buffer-of-skipped-commits:
revision: free commit buffers for skipped commits
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The interpret-trailers command failed to recognise the end of the
message when the commit log ends in an incomplete line.
* bl/trailers-and-incomplete-last-line-fix:
interpret-trailers: handle message without trailing newline
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When git-interpret-trailers is used to add a trailer to a message that
does not end in a trailing newline, the new trailer is added on the line
immediately following the message instead of as a trailer block
separated from the message by a blank line.
For example, if a message's text was exactly "The subject" with no
trailing newline present, `git interpret-trailers --trailer
my-trailer=true` will result in the following malformed commit message:
The subject
my-trailer: true
While it is generally expected that a commit message should end with a
newline character, git-interpret-trailers should not be returning an
invalid message in this case.
Use `strbuf_complete_line` to ensure that the message ends with a
newline character when reading the input.
Signed-off-by: Brian Lyles <brianmlyles@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Cygwin does have /dev/tty support that is needed by things like
single-key input mode.
* rj/cygwin-has-dev-tty:
config.mak.uname: add HAVE_DEV_TTY to cygwin config section
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If neither HAVE_DEV_TTY nor GIT_WINDOWS_NATIVE is set, while compiling
the 'compat/terminal.c' code, then the fallback code calls the system
getpass() function. Unfortunately, this ignores the 'echo' parameter of
the git_terminal_prompt() function, since it has no way to implement that
functionality. This results in a less than optimal user experience on
cygwin, which does not define either of those build flags.
However, cygwin does have a functional '/dev/tty', so that it can build
with HAVE_DEV_TTY and benefit from the improved user experience.
The improved git_terminal_prompt() function that comes with HAVE_DEV_TTY
is used in the git_prompt() function, which in turn is used by the
'git credential', 'git bisect' and 'git help' commands. In addition to
git_terminal_prompt(), read_key_without_echo() is likewise improved and
used by the 'git add -p' command.
While using the 'git credential fill' command, for example:
$ printf "%s\n" protocol=https host=example.com path=git | ./git credential fill
Username for 'https://example.com': user
Password for 'https://user@example.com':
protocol=https
host=example.com
username=user
password=pass
$
The 'user' name is now echoed while typing (the password isn't), where this
wasn't the case before.
When using the auto-correct feature:
$ ./git -c help.autocorrect=prompt fred
WARNING: You called a Git command named 'fred', which does not exist.
Run 'grep' instead [y/N]? n
$ ./git -c help.autocorrect=prompt fred
WARNING: You called a Git command named 'fred', which does not exist.
Run 'grep' instead [y/N]? y
fatal: no pattern given
$
The user can actually see what they are typing at the prompt. Similar
comments apply to 'git bisect':
$ ./git bisect bad master~1
You need to start by "git bisect start"
Do you want me to do it for you [Y/n]? y
status: waiting for both good and bad commits
status: waiting for good commit(s), bad commit known
$ ./git bisect reset
Already on 'master-tmp'
$
$ ./git bisect start
status: waiting for both good and bad commits
$ ./git bisect bad master~1
status: waiting for good commit(s), bad commit known
$ ./git bisect next
warning: bisecting only with a bad commit
Are you sure [Y/n]? n
$ ./git bisect reset
Already on 'master-tmp'
$
The read_key_without_echo() function leads to a much improved 'git add -p'
command, when the 'interactive.singleKey' configuration is set:
$ cd ..
$ mkdir test-git
$ cd test-git
$ git init -q
$ echo foo >file
$ git add file
$ echo bar >file
$ ../git/git -c interactive.singleKey=true add -p
diff --git a/file b/file
index 257cc56..5716ca5 100644
--- a/file
+++ b/file
@@ -1 +1 @@
-foo
+bar
(1/1) Stage this hunk [y,n,q,a,d,e,p,?]? y
$
Note that, not only is the user input echoed, but that it is immediately
accepted (without having to type <return>) and the program exits with the
hunk staged (in this case) or not.
In order to reap these benefits, set the HAVE_DEV_TTY build flag in the
cygwin configuration section of config.mak.uname.
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In a few corner cases "git diff --exit-code" failed to report
"changes" (e.g., renamed without any content change), which has
been corrected.
* rs/diff-exit-code-fix:
diff: report dirty submodules as changes in builtin_diff()
diff: report copies and renames as changes in run_diff_cmd()
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The diff machinery has two ways to detect changes to set the exit code:
Just comparing hashes and comparing blob contents. The latter is needed
if certain changes have to be ignored, e.g. with --ignore-space-change
or --ignore-matching-lines. It's enabled by the diff_options flag
diff_from_contents.
The slower mode as never considered submodules (and subrepos) as changes
with --submodule=diff or --submodule=log, which is inconsistent with
--submodule=short (the default). Fix it.
d7b97b7185 (diff: let external diffs report that changes are
uninteresting, 2024-06-09) set diff_from_contents if external diff
programs are allowed. This is the default e.g. for git diff, and so
that change exposed the inconsistency much more widely.
Reported-by: David Hull <david.hull@friendbuy.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The diff machinery has two ways to detect changes to set the exit code:
Just comparing hashes and comparing blob contents. The latter is needed
if certain changes have to be ignored, e.g. with --ignore-space-change
or --ignore-matching-lines. It's enabled by the diff_options flag
diff_from_contents.
The slower mode has never considered copies and renames to be changes,
which is inconsistent with the quicker one. Fix it. Even if we ignore
the file contents (because it's empty or contains only ignored lines),
there's still the meta data change of adding or changing a filename, so
we need to report it in the exit code.
d7b97b7185 (diff: let external diffs report that changes are
uninteresting, 2024-06-09) set diff_from_contents if external diff
programs are allowed. This is the default e.g. for git diff, and so
that change exposed the inconsistency much more widely.
Reported-by: Jorge Luis Martinez Gomez <jol@jol.dev>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Doc updates.
* jc/doc-skip-fetch-all-and-prefetch:
doc: remote.*.skip{DefaultUpdate,FetchAll} stops prefetch
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Back when 7cc91a2f (Add the configuration option skipFetchAll,
2009-11-09) added for the sole purpose of adding skipFetchAll as a
synonym to skipDefaultUpdate, there was no explanation about the
reason why it was needed., but these two configuration variables
mean exactly the same thing.
Also, when we taught the "prefetch" task to "git maintenance" later,
we did make it pay attention to the setting, but we forgot to
document it.
Document these variables as synonyms that collectively implements
the last-one-wins semantics, and also clarify that the prefetch task
is also controlled by this variable.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The environment GIT_ADVICE has been intentionally kept undocumented
to discourage its use by interactive users. Add documentation to
help tool writers.
* ds/doc-wholesale-disabling-advice-messages:
advice: recommend GIT_ADVICE=0 for tools
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The GIT_ADVICE environment variable was added implicitly in b79deeb5544
(advice: add --no-advice global option, 2024-05-03) but was not
documented. Add documentation to show that it is an option for tools
that want to disable these messages. Make note that while the
--no-advice option exists, older Git versions will fail to parse that
option. The environment variable presents a way to change the behavior
of Git versions that understand it without disrupting older versions.
Co-authored-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A file descriptor left open is now properly closed when "git
sparse-checkout" updates the sparse patterns.
* jk/sparse-fdleak-fix:
sparse-checkout: use fdopen_lock_file() instead of xfdopen()
sparse-checkout: check commit_lock_file when writing patterns
sparse-checkout: consolidate cleanup when writing patterns
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When updating sparse patterns, we open a lock_file to write out the new
data. The lock_file struct holds the file descriptor, but we call
fdopen() to get a stdio handle to do the actual write.
After we finish writing, we fflush() so that all of the data is on disk,
and then call commit_lock_file() which closes the descriptor. But we
never fclose() the stdio handle, leaking it.
The obvious solution seems like it would be to just call fclose(). But
when? If we do it before commit_lock_file(), then the lock_file code is
left thinking it owns the now-closed file descriptor, and will do an
extra close() on the descriptor. But if we do it before, we have the
opposite problem: the lock_file code will close the descriptor, and
fclose() will do the extra close().
We can handle this correctly by using fdopen_lock_file(). That leaves
ownership of the stdio handle with the lock_file, which knows not to
double-close it.
We do have to adjust the code a bit:
- we have to handle errors ourselves; we can just die(), since that's
what xfdopen() would have done (and we can even provide a more
specific error message).
- we no longer need to call fflush(); committing the lock-file
auto-closes it, which will now do the flush for us. As a bonus, this
will actually check that the flush was successful before renaming
the file into place.
- we can get rid of the local "fd" variable, since we never look at it
ourselves now
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When writing a new "sparse-checkout" file, we do the usual strategy of
writing to a lockfile and committing it into place. But we don't check
the outcome of commit_lock_file(). Failing there would prevent us from
writing a bogus file (good), but we would ignore the error and return a
successful exit code (bad).
Fix this by calling die(). Note that we need to keep the sparse_filename
variable valid for longer, since the filename stored in the lock_file
struct will be dropped when we run commit_lock_file().
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In write_patterns_and_update(), we always need to free the pattern list
before exiting the function. Rather than handling it manually when we
return early, we can jump to an "out" label where cleanup happens. This
let us drop one line, but also establishes a pattern we can use for
other cleanup.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "scalar clone" command learned the "--no-tags" option.
* ds/scalar-no-tags:
scalar: add --no-tags option to 'scalar clone'
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Some large repositories use tags to track a huge list of release
versions. While this choice is costly on the ref advertisement, it is
further wasteful for clients who do not need those tags. Allow clients
to optionally skip the tag advertisement.
This behavior is similar to that of 'git clone --no-tags' implemented in
0dab2468ee5 (clone: add a --no-tags option to clone without tags,
2017-04-26), including the modification of the remote.origin.tagOpt
config value to include "--no-tags".
One thing that is opposite of the 'git clone' implementation is that
this allows '--tags' as an assumed option, which can be naturally negated
with '--no-tags'. The clone command does not accept '--tags' but allows
"--no-no-tags" as the negation of its '--no-tags' option.
While testing this option, combine the test with the previously untested
'--no-src' option introduced in 4527db8ff8c (scalar: add --[no-]src
option, 2023-08-28).
Signed-off-by: Derrick Stolee <stolee@gmail.com>
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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Doc updates.
* jc/grammo-fixes:
doc: grammofix in git-diff-tree
tutorial: grammofix
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Test fixes.
* jc/tests-no-useless-tee:
tests: drop use of 'tee' that hides exit status
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Doc updates.
* jc/how-to-maintain-updates:
howto-maintain: mention preformatted docs
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"git bundle unbundle" outside a repository triggered a BUG()
unnecessarily, which has been corrected.
* ps/bundle-outside-repo-fix:
bundle: default to SHA1 when reading bundle headers
builtin/bundle: have unbundle check for repo before opening its bundle
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The patch parser in "git patch-id" has been tightened to avoid
getting confused by lines that look like a patch header in the log
message.
cf. <Zqh2T_2RLt0SeKF7@tanuki>
* jc/patch-id:
patch-id: tighten code to detect the patch header
patch-id: rewrite code that detects the beginning of a patch
patch-id: make get_one_patchid() more extensible
patch-id: call flush_current_id() only when needed
t4204: patch-id supports various input format
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Test fix.
* jk/apply-patch-mode-check-fix:
t4129: fix racy index when calling chmod after git-add
apply: canonicalize modes read from patches
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git cat-file" works well with the sparse-index, and gets marked as
such.
* kl/cat-file-on-sparse-index:
builtin/cat-file: mark 'git cat-file' sparse-index compatible
t1092: allow run_on_* functions to use standard input
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This change affects how 'git cat-file' works with the index when
specifying an object with the ":<path>" syntax (which will give file
contents from the index).
'git cat-file' expands a sparse index to a full index any time contents
are requested from the index by specifying an object with the ":<path>"
syntax. This is true even when the requested file is part of the sparse
index, and results in much slower 'git cat-file' operations when working
within the sparse index.
Mark 'git cat-file' as not needing a full index, so that you only pay
the cost of expanding the sparse index to a full index when you request
a file outside of the sparse index.
Add tests to ensure both that:
- 'git cat-file' returns the correct file contents whether or not the
file is in the sparse index
- 'git cat-file' expands to the full index any time you request
something outside of the sparse index
Signed-off-by: Kevin Lyles <klyles+github@epic.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The 'run_on_sparse' and 'run_on_all' functions do not work correctly for
commands accepting standard input, because they run the same command
multiple times and the first instance consumes it. This also indirectly
affects 'test_all_match' and 'test_sparse_match'.
To allow these functions to work with commands accepting standard input,
first slurp standard input to a temporary file, and then run the command
with its standard input redirected from the temporary file. This ensures
that each command sees the same contents from its standard input.
Note that this does not impact commands that do not read from standard
input; they continue to ignore it. Additionally, existing uses of the
run_on_* functions do not need to do anything differently, as the
standard input of the test environment is already connected to
/dev/null.
We do not explicitly clean up the input files because they are cleaned
up with the rest of the test repositories and their contents may be
useful for figuring out which command failed when a test case fails.
Signed-off-by: Kevin Lyles <klyles@epic.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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One-line messages to "die" and other helper functions will get LF
added by these helper functions, but many existing messages had an
unnecessary LF at the end, which have been corrected.
* jk/messages-with-excess-lf-fix:
drop trailing newline from warning/error/die messages
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Our error reporting routines append a trailing newline, and the strings
we pass to them should not include them (otherwise we get an extra blank
line after the message).
These cases were all found by looking at the results of:
git grep -P '[^_](error|error_errno|warning|die|die_errno)\(.*\\n"[,)]' '*.c'
Note that we _do_ sometimes include a newline in the middle of such
messages, to create multiline output (hence our grep matching "," or ")"
after we see the newline, so we know we're at the end of the string).
It's possible that one or more of these cases could intentionally be
including a blank line at the end, but having looked at them all
manually, I think these are all just mistakes.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git pack-refs --auto" for the files backend was too aggressive,
which has been a bit tamed.
* ps/pack-refs-auto-heuristics:
refs/files: use heuristic to decide whether to repack with `--auto`
t0601: merge tests for auto-packing of refs
wrapper: introduce `log2u()`
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The `--auto` flag for git-pack-refs(1) allows the ref backend to decide
whether or not a repack is in order. This switch has been introduced
mostly with the "reftable" backend in mind, which already knows to
auto-compact its tables during normal operations. When the flag is set,
then it will use the same auto-compaction mechanism and thus end up
doing nothing in most cases.
The "files" backend does not have any such heuristic yet and instead
packs any loose references unconditionally. So we rewrite the complete
"packed-refs" file even if there's only a single loose reference to be
packed.
Even worse, starting with 9f6714ab3e (builtin/gc: pack refs when using
`git maintenance run --auto`, 2024-03-25), `git pack-refs --auto` is
unconditionally executed via our auto maintenance, so we end up repacking
references every single time auto maintenance kicks in. And while that
commit already mentioned that the "files" backend unconditionally packs
refs now, the author obviously didn't quite think about the consequences
thereof. So while the idea was sound, we really should have added a
heuristic to the "files" backend before implementing it.
Introduce a heuristic that decides whether or not it is worth to pack
loose references. The important factors to decide here are the number of
loose references in comparison to the overall size of the "packed-refs"
file. The bigger the "packed-refs" file, the longer it takes to rewrite
it and thus we scale up the limit of allowed loose references before we
repack.
As is the nature of heuristics, this mechansim isn't obviously
"correct", but should rather be seen as a tradeoff between how much
resources we spend packing refs and how inefficient the ref store
becomes. For all I can say, we have successfully been using the exact
same heuristic in Gitaly for several years by now.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We have two tests in t0601 which exercise the same underlying logic,
once via `git pack-refs --auto` and once via `git maintenance run
--auto`. Merge these two tests into one such that it becomes easier to
extend test coverage for both commands at the same time.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We have an implementation of a function that computes the log2 for an
integer. While we could instead use log2(3P), that involves floating
point numbers and is thus needlessly complex and inefficient.
We're about to add a second caller that wants to compute log2 for a
`size_t`. Let's thus move the function into "wrapper.h" such that it
becomes generally available.
While at it, tweak the implementation a bit:
- The parameter is converted from `int` to `uintmax_t`. This
conversion is safe to do in "bisect.c" because we already check that
the argument is positive.
- The return value is an `unsigned`. It cannot ever be negative, so it
is pointless for it to be a signed integer.
- Loop until `!n` instead of requiring that `n > 1` and then subtract
1 from the result and add a special case for `!sz`. This helps
compilers to generate more efficient code.
Compilers recognize the pattern of this function and optimize
accordingly. On GCC 14.2 x86_64:
log2u(unsigned long):
test rdi, rdi
je .L3
bsr rax, rdi
ret
.L3:
mov eax, -1
ret
Clang 18.1 does not yet recognize the pattern, but starts to do so on
Clang trunk x86_64. The code isn't quite as efficient as the one
generated by GCC, but still manages to optimize away the loop:
log2u(unsigned long):
test rdi, rdi
je .LBB0_1
shr rdi
bsr rcx, rdi
mov eax, 127
cmovne rax, rcx
xor eax, -64
add eax, 65
ret
.LBB0_1:
mov eax, -1
ret
The pattern is also recognized on other platforms like ARM64 GCC 14.2.0,
where we end up using `clz`:
log2u(unsigned long):
clz x2, x0
cmp x0, 0
mov w1, 63
sub w0, w1, w2
csinv w0, w0, wzr, ne
ret
Note that we have a similar function `fastlog2()` in the reftable code.
As that codebase is separate from the Git codebase we do not adapt it to
use the new function.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A data corruption bug when multi-pack-index is used and the same
objects are stored in multiple packfiles has been corrected.
* tb/multi-pack-reuse-fix:
builtin/pack-objects.c: do not open-code `MAX_PACK_OBJECT_HEADER`
pack-bitmap.c: avoid repeated `pack_pos_to_offset()` during reuse
builtin/pack-objects.c: translate bit positions during pack-reuse
pack-bitmap: tag bitmapped packs with their corresponding MIDX
t/t5332-multi-pack-reuse.sh: verify pack generation with --strict
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The function `write_reused_pack_one()` defines an header to store the
OFS_DELTA header, but uses the constant "10" instead of
"MAX_PACK_OBJECT_HEADER" (as is done elsewhere in the same patch, circa
bb514de356c (pack-objects: improve partial packfile reuse, 2019-12-18)).
Declare the `ofs_header` field to be sized according to
`MAX_PACK_OBJECT_HEADER` (which is 10, as defined in "pack.h") instead
of the constant 10.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When calling `try_partial_reuse()`, the (sole) caller from the function
`reuse_partial_packfile_from_bitmap_1()` has to translate its bit
position to a pack position.
In the MIDX bitmap case, the caller translates from the bit position, to
a position in the MIDX's pseudo-pack order (with `pack_pos_to_midx()`),
then get a pack offset (with `nth_midxed_offset()`) before finally
working backwards to get the pack position in the source pack by calling
`offset_to_pack_pos()`.
In the non-MIDX bitmap case, we can use the bit position as the pack
position directly (see the comment at the beginning of the
`reuse_partial_packfile_from_bitmap_1()` function for why).
In either case, the first thing that `try_partial_reuse()` does after
being called is determine the offset of the object at the given pack
position by calling `pack_pos_to_offset()`. But we already have that
information in the MIDX case!
Avoid re-computing that information by instead passing it in. In the
MIDX case, we already have that information stored. In the non-MIDX
case, the call to `pack_pos_to_offset()` moves from the function
`try_partial_reuse()` to its caller. In total, we'll save one call to
`pack_pos_to_offset()` when processing MIDX bitmaps.
(On my machine, there is a slight speed-up on the order of ~2ms, but it
is within the margin of error over 10 runs, so I think you'd have to
have a truly gigantic repository to confidently measure any significant
improvement here).
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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