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2021-07-28Merge branch 'ab/attribute-format'Libravatar Junio C Hamano1-0/+1
Many "printf"-like helper functions we have have been annotated with __attribute__() to catch placeholder/parameter mismatches. * ab/attribute-format: advice.h: add missing __attribute__((format)) & fix usage *.h: add a few missing __attribute__((format)) *.c static functions: add missing __attribute__((format)) sequencer.c: move static function to avoid forward decl *.c static functions: don't forward-declare __attribute__
2021-07-13*.h: add a few missing __attribute__((format))Libravatar Ævar Arnfjörð Bjarmason1-0/+1
Add missing format attributes to API functions that take printf arguments. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-06-16comments: avoid using the gender of our usersLibravatar Felipe Contreras1-2/+2
We generally avoid specifying the gender of our users in order to be more inclusive, but sometimes a few slip by due to habit. Since by doing a little bit of rewording we can avoid this irrelevant detail, let's do so. Inspired-by: Derrick Stolee <dstolee@microsoft.com> Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-29Merge branch 'rs/retire-strbuf-write-fd'Libravatar Junio C Hamano1-1/+0
A misdesigned strbuf_write_fd() function has been retired. * rs/retire-strbuf-write-fd: strbuf: remove unreferenced strbuf_write_fd method. bugreport.c: replace strbuf_write_fd with write_in_full
2020-06-19strbuf: remove unreferenced strbuf_write_fd method.Libravatar Randall S. Becker1-1/+0
strbuf_write_fd was only used in bugreport.c. Since that file now uses write_in_full, this method is no longer needed. In addition, strbuf_write_fd did not guard against exceeding MAX_IO_SIZE for the platform, nor provided error handling in the event of a failure if only partial data was written to the file descriptor. Since already write_in_full has this capability and is in general use, it should be used instead. The change impacts strbuf.c and strbuf.h. Signed-off-by: Randall S. Becker <rsbecker@nexbridge.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-05Merge branch 'bc/wildcard-credential'Libravatar Junio C Hamano1-1/+6
Update the parser used for credential.<URL>.<variable> configuration, to handle <URL>s with '/' in them correctly. * bc/wildcard-credential: credential: fix matching URLs with multiple levels in path
2020-05-01Merge branch 'es/bugreport'Libravatar Junio C Hamano1-0/+1
The "bugreport" tool. * es/bugreport: bugreport: drop extraneous includes bugreport: add compiler info bugreport: add uname info bugreport: gather git version and build info bugreport: add tool to generate debugging info help: move list_config_help to builtin/help
2020-04-27credential: fix matching URLs with multiple levels in pathLibravatar brian m. carlson1-1/+6
46fd7b3900 ("credential: allow wildcard patterns when matching config", 2020-02-20) introduced support for matching credential helpers using urlmatch. In doing so, it introduced code to percent-encode the paths we get from the credential helper so that they could be effectively matched by the urlmatch code. Unfortunately, that code had a bug: it percent-encoded the slashes in the path, resulting in any URL path that contained multiple levels (i.e., a directory component) not matching. We are currently the only caller of the percent-encoding code and could simply change it not to encode slashes. However, we still want to encode slashes in the username component, so we need to have both behaviors available. So instead, let's add a flag to control encoding slashes, which is the behavior we want here, and use it when calling the code in this case. Add a test for credential helper URLs using multiple slashes in the path, which our test suite previously lacked, as well as one ensuring that we handle usernames with slashes gracefully. Since we're testing other percent-encoding handling, let's add one for non-ASCII UTF-8 characters as well. Reported-by: Ilya Tretyakov <it@it3xl.ru> Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-16bugreport: add tool to generate debugging infoLibravatar Emily Shaffer1-0/+1
Teach Git how to prompt the user for a good bug report: reproduction steps, expected behavior, and actual behavior. Later, Git can learn how to collect some diagnostic information from the repository. If users can send us a well-written bug report which contains diagnostic information we would otherwise need to ask the user for, we can reduce the number of question-and-answer round trips between the reporter and the Git contributor. Users may also wish to send a report like this to their local "Git expert" if they have put their repository into a state they are confused by. Signed-off-by: Emily Shaffer <emilyshaffer@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-30strbuf: provide function to append whole linesLibravatar Patrick Steinhardt1-0/+6
While the strbuf interface already provides functions to read a line into it that completely replaces its current contents, we do not have an interface that allows for appending lines without discarding current contents. Add a new function `strbuf_appendwholeline` that reads a line including its terminating character into a strbuf non-destructively. This is a preparatory step for git-update-ref(1) reading standard input line-wise instead of as a block. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-05Merge branch 'bc/wildcard-credential'Libravatar Junio C Hamano1-0/+6
A configuration element used for credential subsystem can now use wildcard pattern to specify for which set of URLs the entry applies. * bc/wildcard-credential: credential: allow wildcard patterns when matching config credential: use the last matching username in the config t0300: add tests for some additional cases t1300: add test for urlmatch with multiple wildcards mailmap: add an additional email address for brian m. carlson
2020-02-20credential: allow wildcard patterns when matching configLibravatar brian m. carlson1-0/+6
In some cases, a user will want to use a specific credential helper for a wildcard pattern, such as https://*.corp.example.com. We have code that handles this already with the urlmatch code, so let's use that instead of our custom code. Since the urlmatch code is a superset of our current matching in terms of capabilities, there shouldn't be any cases of things that matched previously that don't match now. However, in addition to wildcard matching, we now use partial path matching, which can cause slightly different behavior in the case that a helper applies to the prefix (considering path components) of the remote URL. While different, this is probably the behavior people were wanting anyway. Since we're using the urlmatch code, we need to encode the components we've gotten into a URL to match, so add a function to percent-encode data and format the URL with it. We now also no longer need to the custom code to match URLs, so let's remove it. Additionally, the urlmatch code always looks for the best match, whereas we want all matches for credential helpers to preserve existing behavior. Let's add an optional field, select_fn, that lets us control which items we want (in this case, all of them) and default it to the best-match code that already exists for other users. Signed-off-by: brian m. carlson <bk2204@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-10strbuf: add and use strbuf_insertstr()Libravatar René Scharfe1-0/+12
Add a function for inserting a C string into a strbuf. Use it throughout the source to get rid of magic string length constants and explicit strlen() calls. Like strbuf_addstr(), implement it as an inline function to avoid the implicit strlen() calls to cause runtime overhead. Helped-by: Taylor Blau <me@ttaylorr.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-12-13strbuf: add a helper function to call the editor "on an strbuf"Libravatar Johannes Schindelin1-0/+11
This helper supports the scenario where Git has a populated `strbuf` and wants to let the user edit it interactively. In `git add -p`, we will use this to allow interactive hunk editing: the diff hunks are already in memory, but we need to write them out to a file so that an editor can be launched, then read everything back once the user is done editing. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-09-18Merge branch 'md/list-objects-filter-combo'Libravatar Junio C Hamano1-1/+6
The list-objects-filter API (used to create a sparse/lazy clone) learned to take a combined filter specification. * md/list-objects-filter-combo: list-objects-filter-options: make parser void list-objects-filter-options: clean up use of ALLOC_GROW list-objects-filter-options: allow mult. --filter strbuf: give URL-encoding API a char predicate fn list-objects-filter-options: make filter_spec a string_list list-objects-filter-options: move error check up list-objects-filter: implement composite filters list-objects-filter-options: always supply *errbuf list-objects-filter: put omits set in filter struct list-objects-filter: encapsulate filter components
2019-07-02l10n: localizable upload progress messagesLibravatar Dimitriy Ryazantcev1-0/+6
Currenly the data rate in throughput_string(...) method is output by simple strbuf_humanise_bytes(...) call and '/s' append. But for proper translation of such string the translator needs full context. Add strbuf_humanise_rate(...) method to properly print out localizable version of data rate ('3.5 MiB/s' etc) with full context. Strings with the units in strbuf_humanise_bytes(...) are marked for translation. Signed-off-by: Dimitriy Ryazantcev <dimitriy.ryazantcev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-28strbuf: give URL-encoding API a char predicate fnLibravatar Matthew DeVore1-1/+6
Allow callers to specify exactly what characters need to be URL-encoded and which do not. This new API will be taken advantage of in a patch later in this set. Helped-by: Jeff King <peff@peff.net> Signed-off-by: Matthew DeVore <matvore@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-22Merge branch 'ps/stash-in-c'Libravatar Junio C Hamano1-0/+16
"git stash" rewritten in C. * ps/stash-in-c: (28 commits) tests: add a special setup where stash.useBuiltin is off stash: optionally use the scripted version again stash: add back the original, scripted `git stash` stash: convert `stash--helper.c` into `stash.c` stash: replace all `write-tree` child processes with API calls stash: optimize `get_untracked_files()` and `check_changes()` stash: convert save to builtin stash: make push -q quiet stash: convert push to builtin stash: convert create to builtin stash: convert store to builtin stash: convert show to builtin stash: convert list to builtin stash: convert pop to builtin stash: convert branch to builtin stash: convert drop and clear to builtin stash: convert apply to builtin stash: mention options in `show` synopsis stash: add tests for `git stash show` config stash: rename test cases to be more descriptive ...
2019-03-01strbuf.c: add `strbuf_insertf()` and `strbuf_vinsertf()`Libravatar Paul-Sebastian Ungureanu1-0/+9
Implement `strbuf_insertf()` and `strbuf_vinsertf()` to insert data using a printf format string. Original-idea-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com> Helped-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-01strbuf.c: add `strbuf_join_argv()`Libravatar Paul-Sebastian Ungureanu1-0/+7
Implement `strbuf_join_argv()` to join arguments into a strbuf. Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com> Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-01-29strbuf: separate callback for strbuf_expand:ing literalsLibravatar Anders Waldenborg1-0/+8
Expanding '%n' and '%xNN' is generic functionality, so extract that from the pretty.c formatter into a callback that can be reused. No functional change intended Signed-off-by: Anders Waldenborg <anders@0x63.nu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-02Merge branch 'pk/rebase-in-c-3-acts'Libravatar Junio C Hamano1-0/+3
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
2018-11-02Merge branch 'ag/rebase-i-in-c'Libravatar Junio C Hamano1-2/+4
Rewrite of the remaining "rebase -i" machinery in C. * ag/rebase-i-in-c: rebase -i: move rebase--helper modes to rebase--interactive rebase -i: remove git-rebase--interactive.sh rebase--interactive2: rewrite the submodes of interactive rebase in C rebase -i: implement the main part of interactive rebase as a builtin rebase -i: rewrite init_basic_state() in C rebase -i: rewrite write_basic_state() in C rebase -i: rewrite the rest of init_revisions_and_shortrevisions() in C rebase -i: implement the logic to initialize $revisions in C rebase -i: remove unused modes and functions rebase -i: rewrite complete_action() in C t3404: todo list with commented-out commands only aborts sequencer: change the way skip_unnecessary_picks() returns its result sequencer: refactor append_todo_help() to write its message to a buffer rebase -i: rewrite checkout_onto() in C rebase -i: rewrite setup_reflog_action() in C sequencer: add a new function to silence a command, except if it fails rebase -i: rewrite the edit-todo functionality in C editor: add a function to launch the sequence editor rebase -i: rewrite append_todo_help() in C sequencer: make three functions and an enum from sequencer.c public
2018-09-29strbuf.h: format according to coding guidelinesLibravatar Stefan Beller1-67/+81
The previous patch suggested the strbuf header to be the leading example of how we would want our APIs to be documented. This may lead to some scrutiny of that code and the coding style (which is different from the API documentation style) and hence might be taken as an example on how to format code as well. So let's format strbuf.h in a way that we'd like to see: * omit the extern keyword from function declarations * name all parameters (usually the parameters are obvious from its type, but consider exceptions like `int strbuf_getwholeline_fd(struct strbuf *, int, int);` * break overly long lines Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-06builtin rebase: support --continueLibravatar Pratik Karki1-0/+3
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>
2018-08-10editor: add a function to launch the sequence editorLibravatar Alban Gruin1-0/+2
As part of the rewrite of interactive rebase, the sequencer will need to open the sequence editor to allow the user to edit the todo list. Instead of duplicating the existing launch_editor() function, this refactors it to a new function, launch_specified_editor(), which takes the editor as a parameter, in addition to the path, the buffer and the environment variables. launch_sequence_editor() is then added to launch the sequence editor. Signed-off-by: Alban Gruin <alban.gruin@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-23Merge branch 'en/rename-directory-detection-reboot'Libravatar Junio C Hamano1-0/+16
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 ...
2018-05-08merge-recursive: check for file level conflicts then get new nameLibravatar Elijah Newren1-0/+16
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>
2018-05-08Merge branch 'ls/checkout-encoding'Libravatar Junio C Hamano1-0/+1
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()
2018-04-11Revert "Merge branch 'en/rename-directory-detection'"Libravatar Junio C Hamano1-16/+0
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>
2018-04-10Merge branch 'bc/object-id'Libravatar Junio C Hamano1-1/+7
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 ...
2018-04-10Merge branch 'en/rename-directory-detection'Libravatar Junio C Hamano1-0/+16
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 ...
2018-03-14strbuf: convert strbuf_add_unique_abbrev to use struct object_idLibravatar brian m. carlson1-1/+7
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>
2018-02-15strbuf: add xstrdup_toupper()Libravatar Lars Schneider1-0/+1
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>
2018-02-14merge-recursive: check for file level conflicts then get new nameLibravatar Elijah Newren1-0/+16
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>
2018-02-12worktree move: accept destination as directoryLibravatar Nguyễn Thái Ngọc Duy1-0/+3
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>
2017-12-05strbuf: remove unused stripspace function aliasLibravatar Elijah Newren1-9/+0
In commit 63af4a8446 ("strbuf: make stripspace() part of strbuf", 2015-10-16), stripspace() was moved to strbuf and renamed to strbuf_stripspace(). A "temporary" alias was added for the old name until all topic branches had time to switch over. They have had time, so remove the old alias. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-07Merge branch 'jn/strbuf-doc-re-reuse'Libravatar Junio C Hamano1-2/+9
* jn/strbuf-doc-re-reuse: strbuf doc: reuse after strbuf_release is fine
2017-10-04strbuf doc: reuse after strbuf_release is fineLibravatar Jonathan Nieder1-2/+9
strbuf_release leaves the strbuf in a valid, initialized state, so there is no need to call strbuf_init after it. Moreover, this is not likely to change in the future: strbuf_release leaving the strbuf in a valid state has been easy to maintain and has been very helpful for Git's robustness and simplicity (e.g., preventing use-after-free vulnerabilities). Document the semantics so the next generation of Git developers can become familiar with them without reading the implementation. It is still not advisable to call strbuf_release too often because it is wasteful, so add a note pointing to strbuf_reset for that. The same semantics apply to strbuf_detach. Add a similar note to its docstring to make that clear. Improved-by: Jeff King <peff@peff.net> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-10Merge branch 'ma/ts-cleanups'Libravatar Junio C Hamano1-1/+4
Assorted bugfixes and clean-ups. * ma/ts-cleanups: ThreadSanitizer: add suppressions strbuf_setlen: don't write to strbuf_slopbuf pack-objects: take lock before accessing `remaining` convert: always initialize attr_action in convert_attrs
2017-08-23strbuf_setlen: don't write to strbuf_slopbufLibravatar Martin Ågren1-1/+4
strbuf_setlen(., 0) writes '\0' to sb.buf[0], where buf is either allocated and unique to sb, or the global slopbuf. The slopbuf is meant to provide a guarantee that buf is not NULL and that a freshly initialized buffer contains the empty string, but it is not supposed to be written to. That strbuf_setlen writes to slopbuf has at least two implications: First, it's wrong in principle. Second, it might be hiding misuses which are just waiting to wreak havoc. Third, ThreadSanitizer detects a race when multiple threads write to slopbuf at roughly the same time, thus potentially making any more critical races harder to spot. Avoid writing to strbuf_slopbuf in strbuf_setlen. Let's instead assert on the first byte of slopbuf being '\0', since it helps ensure the promised invariant of buf[len] == '\0'. (We know that "len" was already 0, or someone has messed with "alloc". If someone has fiddled with the fields that much beyond the correct interface, they're on their own.) This is a function which is used in many places, possibly also in hot code paths. There are two branches in strbuf_setlen already, and we are adding a third and possibly a fourth (in the assert). In hot code paths, we hopefully reuse the buffer in order to avoid continous reallocations. Thus, after a start-up phase, we should always take the same path, which might help branch prediction, and we would never make the assert. If a hot code path continuously reallocates, we probably have bigger performance problems than this new safety-check. Simple measurements do not contradict this reasoning. 100000000 times resetting a buffer and adding the empty string takes 5.29/5.26 seconds with/without this patch (best of three). Releasing at every iteration yields 18.01/17.87. Adding a 30-character string instead of the empty string yields 5.61/5.58 and 17.28/17.28(!). This patch causes the git binary emitted by gcc 5.4.0 -O2 on my machine to grow from 11389848 bytes to 11497184 bytes, an increase of 0.9%. I also tried to piggy-back on the fact that we already check alloc, which should already tell us whether we are using the slopbuf: if (sb->alloc) { if (len > sb->alloc - 1) die("BUG: strbuf_setlen() beyond buffer"); sb->buf[len] = '\0'; } else { if (len) die("BUG: strbuf_setlen() beyond buffer"); assert(!strbuf_slopbuf[0]); } sb->len = len; That didn't seem to be much slower (5.38, 18.02, 5.70, 17.32 seconds), but it does introduce some minor code duplication. The resulting git binary was 11510528 bytes large (another 0.1% increase). Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-07-14strbuf: use designated initializers in STRBUF_INITLibravatar Jeff King1-1/+1
There are certain C99 features that might be nice to use in our code base, but we've hesitated to do so in order to avoid breaking compatibility with older compilers. But we don't actually know if people are even using pre-C99 compilers these days. One way to figure that out is to introduce a very small use of a feature, and see if anybody complains. The strbuf code is a good place to do this for a few reasons: - it always gets compiled, no matter which Makefile knobs have been tweaked. - it's very stable; this definition hasn't changed in a long time and is not likely to (so if we have to revert, it's unlikely to cause headaches) If this patch can survive a few releases without complaint, then we can feel more confident that designated initializers are widely supported by our user base. It also is an indication that other C99 features may be supported, but not a guarantee (e.g., gcc had designated initializers before C99 existed). And if we do get complaints, then we'll have gained some data and we can easily revert this patch. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-07-06Merge branch 'ab/strbuf-addftime-tzname-boolify'Libravatar Junio C Hamano1-2/+3
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
2017-07-01strbuf: change an always NULL/"" strbuf_addftime() param to boolLibravatar Ævar Arnfjörð Bjarmason1-2/+3
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>
2017-06-24Merge branch 'rs/pretty-add-again'Libravatar Junio C Hamano1-6/+0
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
2017-06-24strbuf.h comment: discuss strbuf_addftime() arguments in orderLibravatar Ævar Arnfjörð Bjarmason1-1/+1
Change the comment documenting the strbuf_addftime() function to discuss the parameters in the order in which they appear, which makes this easier to read than discussing them out of order. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-15strbuf: let strbuf_addftime handle %z and %Z itselfLibravatar René Scharfe1-2/+8
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>
2017-06-15pretty: recalculate duplicate short hashesLibravatar René Scharfe1-6/+0
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>
2017-03-14Merge branch 'jk/interpret-branch-name'Libravatar Junio C Hamano1-1/+20
"git branch @" created refs/heads/@ as a branch, and in general the code that handled @{-1} and @{upstream} was a bit too loose in disambiguating. * jk/interpret-branch-name: checkout: restrict @-expansions when finding branch strbuf_check_ref_format(): expand only local branches branch: restrict @-expansions when deleting t3204: test git-branch @-expansion corner cases interpret_branch_name: allow callers to restrict expansions strbuf_branchname: add docstring strbuf_branchname: drop return value interpret_branch_name: move docstring to header file interpret_branch_name(): handle auto-namelen for @{-1}
2017-03-10Merge branch 'rs/strbuf-add-real-path'Libravatar Junio C Hamano1-0/+14
An helper function to make it easier to append the result from real_path() to a strbuf has been added. * rs/strbuf-add-real-path: strbuf: add strbuf_add_real_path() cocci: use ALLOC_ARRAY