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Rewrite "git rebase" in C.
* pk/rebase-in-c-3-acts:
builtin rebase: stop if `git am` is in progress
builtin rebase: actions require a rebase in progress
builtin rebase: support --edit-todo and --show-current-patch
builtin rebase: support --quit
builtin rebase: support --abort
builtin rebase: support --skip
builtin rebase: support --continue
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This commit adds the option `--continue` which is used to resume
rebase after merge conflicts. The code tries to stay as close to
the equivalent shell scripts found in `git-legacy-rebase.sh` as
possible.
When continuing a rebase, the state variables are read from state_dir.
Some of the state variables are not actually stored there, such as
`upstream`. The shell script version simply does not set them, but for
consistency, we unset them in the builtin version.
Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code clean-up to use size_t/ssize_t when they are the right type.
* jk/size-t:
strbuf_humanise: use unsigned variables
pass st.st_size as hint for strbuf_readlink()
strbuf_readlink: use ssize_t
strbuf: use size_t for length in intermediate variables
reencode_string: use size_t for string lengths
reencode_string: use st_add/st_mult helpers
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All of the numeric formatting done by this function uses
"%u", but we pass in a signed "int". The actual range
doesn't matter here, since the conditional makes sure we're
always showing reasonably small numbers. And even gcc's
format-checker does not seem to mind. But it's potentially
confusing to a reader of the code to see the mismatch.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The return type of readlink() is ssize_t, not int. This
probably doesn't matter in practice, as it would require a
2GB symlink destination, but it doesn't hurt to be careful.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A few strbuf functions store the length of a strbuf in a
temporary variable. We should always use size_t for this, as
it's possible for a strbuf to exceed an "int" (e.g., a 2GB
string on a 64-bit system). This is unlikely in practice,
but we should try to behave sensibly on silly or malicious
input.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The iconv interface takes a size_t, which is the appropriate
type for an in-memory buffer. But our reencode_string_*
functions use integers, meaning we may get confusing results
when the sizes exceed INT_MAX. Let's use size_t
consistently.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In order to be sure we have enough space to use with any hash algorithm,
use GIT_MAX_HEXSZ to allocate space.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Developer support update, by using BUG() macro instead of die() to
mark codepaths that should not happen more clearly.
* js/use-bug-macro:
BUG_exit_code: fix sparse "symbol not declared" warning
Convert remaining die*(BUG) messages
Replace all die("BUG: ...") calls by BUG() ones
run-command: use BUG() to report bugs, not die()
test-tool: help verifying BUG() code paths
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Rename detection logic in "diff" family that is used in "merge" has
learned to guess when all of x/a, x/b and x/c have moved to z/a,
z/b and z/c, it is likely that x/d added in the meantime would also
want to move to z/d by taking the hint that the entire directory
'x' moved to 'z'. A bug causing dirty files involved in a rename
to be overwritten during merge has also been fixed as part of this
work. Incidentally, this also avoids updating a file in the
working tree after a (non-trivial) merge whose result matches what
our side originally had.
* en/rename-directory-detection-reboot: (36 commits)
merge-recursive: fix check for skipability of working tree updates
merge-recursive: make "Auto-merging" comment show for other merges
merge-recursive: fix remainder of was_dirty() to use original index
merge-recursive: fix was_tracked() to quit lying with some renamed paths
t6046: testcases checking whether updates can be skipped in a merge
merge-recursive: avoid triggering add_cacheinfo error with dirty mod
merge-recursive: move more is_dirty handling to merge_content
merge-recursive: improve add_cacheinfo error handling
merge-recursive: avoid spurious rename/rename conflict from dir renames
directory rename detection: new testcases showcasing a pair of bugs
merge-recursive: fix remaining directory rename + dirty overwrite cases
merge-recursive: fix overwriting dirty files involved in renames
merge-recursive: avoid clobbering untracked files with directory renames
merge-recursive: apply necessary modifications for directory renames
merge-recursive: when comparing files, don't include trees
merge-recursive: check for file level conflicts then get new name
merge-recursive: add computation of collisions due to dir rename & merging
merge-recursive: check for directory level conflicts
merge-recursive: add get_directory_renames()
merge-recursive: make a helper function for cleanup for handle_renames
...
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Before trying to apply directory renames to paths within the given
directories, we want to make sure that there aren't conflicts at the
file level either. If there aren't any, then get the new name from
any directory renames.
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The new "checkout-encoding" attribute can ask Git to convert the
contents to the specified encoding when checking out to the working
tree (and the other way around when checking in).
* ls/checkout-encoding:
convert: add round trip check based on 'core.checkRoundtripEncoding'
convert: add tracing for 'working-tree-encoding' attribute
convert: check for detectable errors in UTF encodings
convert: add 'working-tree-encoding' attribute
utf8: add function to detect a missing UTF-16/32 BOM
utf8: add function to detect prohibited UTF-16/32 BOM
utf8: teach same_encoding() alternative UTF encoding names
strbuf: add a case insensitive starts_with()
strbuf: add xstrdup_toupper()
strbuf: remove unnecessary NUL assignment in xstrdup_tolower()
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In d8193743e08 (usage.c: add BUG() function, 2017-05-12), a new macro
was introduced to use for reporting bugs instead of die(). It was then
subsequently used to convert one single caller in 588a538ae55
(setup_git_env: convert die("BUG") to BUG(), 2017-05-12).
The cover letter of the patch series containing this patch
(cf 20170513032414.mfrwabt4hovujde2@sigill.intra.peff.net) is not
terribly clear why only one call site was converted, or what the plan
is for other, similar calls to die() to report bugs.
Let's just convert all remaining ones in one fell swoop.
This trick was performed by this invocation:
sed -i 's/die("BUG: /BUG("/g' $(git grep -l 'die("BUG' \*.c)
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This reverts commit e4bb62fa1eeee689744b413e29a50b4d1dae6886, reversing
changes made to 468165c1d8a442994a825f3684528361727cd8c0.
The topic appears to inflict severe regression in renaming merges,
even though the promise of it was that it would improve them.
We do not yet know which exact change in the topic was wrong, but in
the meantime, let's play it safe and revert it out of 'master'
before real Git-using projects are harmed.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Conversion from uchar[20] to struct object_id continues.
* bc/object-id: (36 commits)
convert: convert to struct object_id
sha1_file: introduce a constant for max header length
Convert lookup_replace_object to struct object_id
sha1_file: convert read_sha1_file to struct object_id
sha1_file: convert read_object_with_reference to object_id
tree-walk: convert tree entry functions to object_id
streaming: convert istream internals to struct object_id
tree-walk: convert get_tree_entry_follow_symlinks internals to object_id
builtin/notes: convert static functions to object_id
builtin/fmt-merge-msg: convert remaining code to object_id
sha1_file: convert sha1_object_info* to object_id
Convert remaining callers of sha1_object_info_extended to object_id
packfile: convert unpack_entry to struct object_id
sha1_file: convert retry_bad_packed_offset to struct object_id
sha1_file: convert assert_sha1_type to object_id
builtin/mktree: convert to struct object_id
streaming: convert open_istream to use struct object_id
sha1_file: convert check_sha1_signature to struct object_id
sha1_file: convert read_loose_object to use struct object_id
builtin/index-pack: convert struct ref_delta_entry to object_id
...
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Rename detection logic in "diff" family that is used in "merge" has
learned to guess when all of x/a, x/b and x/c have moved to z/a,
z/b and z/c, it is likely that x/d added in the meantime would also
want to move to z/d by taking the hint that the entire directory
'x' moved to 'z'. A bug causing dirty files involved in a rename
to be overwritten during merge has also been fixed as part of this
work.
* en/rename-directory-detection: (29 commits)
merge-recursive: ensure we write updates for directory-renamed file
merge-recursive: avoid spurious rename/rename conflict from dir renames
directory rename detection: new testcases showcasing a pair of bugs
merge-recursive: fix remaining directory rename + dirty overwrite cases
merge-recursive: fix overwriting dirty files involved in renames
merge-recursive: avoid clobbering untracked files with directory renames
merge-recursive: apply necessary modifications for directory renames
merge-recursive: when comparing files, don't include trees
merge-recursive: check for file level conflicts then get new name
merge-recursive: add computation of collisions due to dir rename & merging
merge-recursive: check for directory level conflicts
merge-recursive: add get_directory_renames()
merge-recursive: make a helper function for cleanup for handle_renames
merge-recursive: split out code for determining diff_filepairs
merge-recursive: make !o->detect_rename codepath more obvious
merge-recursive: fix leaks of allocated renames and diff_filepairs
merge-recursive: introduce new functions to handle rename logic
merge-recursive: move the get_renames() function
directory rename detection: tests for handling overwriting dirty files
directory rename detection: tests for handling overwriting untracked files
...
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"git worktree" learned move and remove subcommands.
* nd/worktree-move:
t2028: fix minor error and issues in newly-added "worktree move" tests
worktree remove: allow it when $GIT_WORK_TREE is already gone
worktree remove: new command
worktree move: refuse to move worktrees with submodules
worktree move: accept destination as directory
worktree move: new command
worktree.c: add update_worktree_location()
worktree.c: add validate_worktree()
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Convert find_unique_abbrev and find_unique_abbrev_r to each take a
pointer to struct object_id.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Convert the declaration and definition of strbuf_add_unique_abbrev to
make it take a pointer to struct object_id. Predeclare the struct in
strbuf.h, as cache.h includes strbuf.h before it declares the struct,
and otherwise the struct declaration would have the wrong scope.
Apply the following semantic patch, along with the standard object_id
transforms, to adjust the callers:
@@
expression E1, E2, E3;
@@
- strbuf_add_unique_abbrev(E1, E2.hash, E3);
+ strbuf_add_unique_abbrev(E1, &E2, E3);
@@
expression E1, E2, E3;
@@
- strbuf_add_unique_abbrev(E1, E2->hash, E3);
+ strbuf_add_unique_abbrev(E1, E2, E3);
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Check in a case insensitive manner if one string is a prefix of another
string.
This function is used in a subsequent commit.
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If we encounter a read error, the user may want to report it
by looking at errno. However, our close() call may clobber
errno, leading to confusing results. Let's save and restore
it in the error case.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Create a copy of an existing string and make all characters upper case.
Similar xstrdup_tolower().
This function is used in a subsequent commit.
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Since 3733e69464 (use xmallocz to avoid size arithmetic, 2016-02-22) we
allocate the buffer for the lower case string with xmallocz(). This
already ensures a NUL at the end of the allocated buffer.
Remove the unnecessary assignment.
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Before trying to apply directory renames to paths within the given
directories, we want to make sure that there aren't conflicts at the
file level either. If there aren't any, then get the new name from
any directory renames.
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Similar to "mv a b/", which is actually "mv a b/a", we extract basename
of source worktree and create a directory of the same name at
destination if dst path is a directory.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Bytes with high-bit set were encoded incorrectly and made
credential helper fail.
* jd/fix-strbuf-add-urlencode-bytes:
strbuf: fix urlencode format string on signed char
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Introduce a helper to simplify code to parse a common pattern that
expects either "--key" or "--key=<something>".
* cc/skip-to-optional-val:
t4045: reindent to make helpers readable
diff: add tests for --relative without optional prefix value
diff: use skip_to_optional_arg_default() in parsing --relative
diff: use skip_to_optional_arg_default()
diff: use skip_to_optional_arg()
index-pack: use skip_to_optional_arg()
git-compat-util: introduce skip_to_optional_arg()
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Leakfix.
* rs/strbuf-read-once-reset-length:
strbuf: release memory on read error in strbuf_read_once()
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Git credential fails with special char in password with
remote: Invalid username or password.
fatal: Authentication failed for
File ~/.git-credential contains badly urlencoded characters
%ffffffXX%ffffffYY instead of %XX%YY.
Add a cast to an unsigned char to fix urlencode use of %02x on a
char.
Signed-off-by: Julien Dusser <julien.dusser@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We often accept both a "--key" option and a "--key=<val>" option.
These options currently are parsed using something like:
if (!strcmp(arg, "--key")) {
/* do something */
} else if (skip_prefix(arg, "--key=", &arg)) {
/* do something with arg */
}
which is a bit cumbersome compared to just:
if (skip_to_optional_arg(arg, "--key", &arg)) {
/* do something with arg */
}
This also introduces skip_to_optional_arg_default() for the few
cases where something different should be done when the first
argument is exactly "--key" than when it is exactly "--key=".
In general it is better for UI consistency and simplicity if
"--key" and "--key=" do the same thing though, so that using
skip_to_optional_arg() should be encouraged compared to
skip_to_optional_arg_default().
Note that these functions can be used to parse any "key=value"
string where "key" is also considered as valid, not just
command line options.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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If other strbuf add functions cause the first allocation and
subsequently encounter an error then they release the memory, restoring
the pristine state of the strbuf. That simplifies error handling for
callers.
Do the same in strbuf_read_once(), and do it also in case no bytes were
read -- which may or may not be an error as well, depending on the
caller.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A helper function to read a single whole line into strbuf
mistakenly triggered OOM error at EOF under certain conditions,
which has been fixed.
* rs/strbuf-getwholeline-fix:
strbuf: clear errno before calling getdelim(3)
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getdelim(3) returns -1 at the end of the file and if it encounters an
error, but sets errno only in the latter case. Set errno to zero before
calling it to avoid misdiagnosing an out-of-memory condition due to a
left-over value from some other function call.
Reported-by: Yaroslav Halchenko <yoh@onerussian.com>
Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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strbuf_addftime() is further getting tweaked.
* ab/strbuf-addftime-tzname-boolify:
strbuf: change an always NULL/"" strbuf_addftime() param to bool
strbuf.h comment: discuss strbuf_addftime() arguments in order
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strbuf_addftime() allows callers to pass a time zone name for
expanding %Z. The only current caller either passes the empty string
or NULL, in which case %Z is handed over verbatim to strftime(3).
Replace that string parameter with a flag controlling whether to
remove %Z from the format specification. This simplifies the code.
Commit-message-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The pretty-format specifiers like '%h', '%t', etc. had an
optimization that no longer works correctly. In preparation/hope
of getting it correctly implemented, first discard the optimization
that is broken.
* rs/pretty-add-again:
pretty: recalculate duplicate short hashes
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There is no portable way to pass timezone information to strftime. Add
parameters for timezone offset and name to strbuf_addftime and let it
handle the timezone-related format specifiers %z and %Z internally.
Callers can opt out for %Z by passing NULL as timezone name. %z is
always handled internally -- this helps on Windows, where strftime would
expand it to a timezone name (same as %Z), in violation of POSIX.
Modifiers are not handled, e.g. %Ez is still passed to strftime.
Use an empty string as timezone name in show_date (the only current
caller) for now because we only have the timezone offset in non-local
mode. POSIX allows %Z to resolve to an empty string in case of missing
information.
Helped-by: Ulrich Mueller <ulm@gentoo.org>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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b9c6232138 (--format=pretty: avoid calculating expensive expansions
twice) optimized adding short hashes multiple times by using the
fact that the output strbuf was only ever simply appended to and
copying the added string from the previous run. That prerequisite
is no longer given; we now have modfiers like %< and %+ that can
cause the cache to lose track of the correct offsets. Remove it.
Reported-by: Michael Giuffrida <michaelpg@chromium.org>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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FreeBSD implementation of getcwd(3) behaved differently when an
intermediate directory is unreadable/unsearchable depending on the
length of the buffer provided, which our strbuf_getcwd() was not
aware of. strbuf_getcwd() has been taught to cope with it better.
* rs/freebsd-getcwd-workaround:
strbuf: support long paths w/o read rights in strbuf_getcwd() on FreeBSD
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FreeBSD implements getcwd(3) as a syscall, but falls back to a version
based on readdir(3) if it fails for some reason. The latter requires
permissions to read and execute path components, while the former does
not. That means that if our buffer is too small and we're missing
rights we could get EACCES, but we may succeed with a bigger buffer.
Keep retrying if getcwd(3) indicates lack of permissions until our
buffer can fit PATH_MAX bytes, as that's the maximum supported by the
syscall on FreeBSD anyway. This way we do what we can to be able to
benefit from the syscall, but we also won't loop forever if there is a
real permission issue.
This fixes a regression introduced with 7333ed17 (setup: convert
setup_git_directory_gently_1 et al. to strbuf, 2014-07-28) for paths
longer than 127 bytes with components that miss read or execute
permissions (e.g. 0711 on /home for privacy reasons); we used a fixed
PATH_MAX-sized buffer before.
Reported-by: Zenobiusz Kunegunda <zenobiusz.kunegunda@interia.pl>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a function for appending the canonized absolute pathname of a given
path to a strbuf. It keeps the existing contents intact, as expected of
a function of the strbuf_add() family, while avoiding copying the result
if the given strbuf is empty. It's more consistent with the rest of the
strbuf API than strbuf_realpath(), which it's wrapping.
Also add a semantic patch demonstrating its intended usage and apply it
to the current tree. Using strbuf_add_real_path() instead of calling
strbuf_addstr() and real_path() avoids an extra copy to a static buffer.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we add a new alternate to the list, we try to normalize
out any redundant "..", etc. However, we do not look at the
return value of normalize_path_copy(), and will happily
continue with a path that could not be normalized. Worse,
the normalizing process is done in-place, so we are left
with whatever half-finished working state the normalizing
function was in.
Fortunately, this cannot cause us to read past the end of
our buffer, as that working state will always leave the
NUL from the original path in place. And we do tend to
notice problems when we check is_directory() on the path.
But you can see the nonsense that we feed to is_directory
with an entry like:
this/../../is/../../way/../../too/../../deep/../../to/../../resolve
in your objects/info/alternates, which yields:
error: object directory
/to/e/deep/too/way//ects/this/../../is/../../way/../../too/../../deep/../../to/../../resolve
does not exist; check .git/objects/info/alternates.
We can easily fix this just by checking the return value.
But that makes it hard to generate a good error message,
since we're normalizing in-place and our input value has
been overwritten by cruft.
Instead, let's provide a strbuf helper that does an in-place
normalize, but restores the original contents on error. This
uses a second buffer under the hood, which is slightly less
efficient, but this is not a performance-critical code path.
The strbuf helper can also properly set the "len" parameter
of the strbuf before returning. Just doing:
normalize_path_copy(buf.buf, buf.buf);
will shorten the string, but leave buf.len at the original
length. That may be confusing to later code which uses the
strbuf.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code cleanup.
* rs/strbuf-remove-fix:
strbuf: use valid pointer in strbuf_remove()
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Code cleanup.
* rs/strbuf-remove-fix:
strbuf: use valid pointer in strbuf_remove()
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The fourth argument of strbuf_splice() is passed to memcpy(3), which is
not supposed to handle NULL pointers. Let's be extra careful and use a
valid empty string instead. It even shortens the source code. :)
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code cleanup.
* rs/use-strbuf-addbuf:
strbuf: avoid calling strbuf_grow() twice in strbuf_addbuf()
use strbuf_addbuf() for appending a strbuf to another
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Code cleanup.
* rs/use-strbuf-addbuf:
strbuf: avoid calling strbuf_grow() twice in strbuf_addbuf()
use strbuf_addbuf() for appending a strbuf to another
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Implement strbuf_addbuf() as a normal function in order to avoid calling
strbuf_grow() twice, with the second callinside strbud_add() being a
no-op. This is slightly faster and also reduces the text size a bit.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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strbuf_getwholeline() did not NUL-terminate the buffer on certain
corner cases in its error codepath.
* jk/getwholeline-getdelim-empty:
strbuf_getwholeline: NUL-terminate getdelim buffer on error
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A major part of "git submodule update" has been ported to C to take
advantage of the recently added framework to run download tasks in
parallel.
* sb/submodule-parallel-update:
clone: allow an explicit argument for parallel submodule clones
submodule update: expose parallelism to the user
submodule helper: remove double 'fatal: ' prefix
git submodule update: have a dedicated helper for cloning
run_processes_parallel: rename parameters for the callbacks
run_processes_parallel: treat output of children as byte array
submodule update: direct error message to stderr
fetching submodules: respect `submodule.fetchJobs` config option
submodule-config: drop check against NULL
submodule-config: keep update strategy around
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