aboutsummaryrefslogtreecommitdiff
path: root/builtin-branch.c
Commit message (Collapse)AuthorAge
* UI consistency: allow --force for where -f means forceRené Scharfe2009-08-29
| | | | | | | | | | | | git branch, checkout, clean, mv and tag all have an option -f to override certain checks. This patch makes them accept the long option --force as a synonym. While we're at it, document that checkout support --quiet as synonym for its short option -q. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'maint'Junio C Hamano2009-07-24
|\ | | | | | | | | | | | | | | | | | | | | | | | | * maint: SunOS grep does not understand -C<n> nor -e Fix export_marks() error handling. git branch: clean up detached branch handling git branch: avoid unnecessary object lookups git branch: fix performance problem do_one_ref(): null_sha1 check is not about broken ref Conflicts: Makefile
| * git branch: clean up detached branch handlingLinus Torvalds2009-07-23
| | | | | | | | | | | | | | | | | | Make the 'show detached branch info' a routine of its own. And in the process, avoid the object lookup that is unnecessary if the current branch isn't detached. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * git branch: avoid unnecessary object lookupsLinus Torvalds2009-07-23
| | | | | | | | | | | | | | | | They can be expensive in the cold-cache case, so don't bother looking up the commits for all branches unless we really need them for some reason. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * git branch: fix performance problemLinus Torvalds2009-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 'git branch' looks at _all_ the refs, and verifies them. Which means that during cold-cache situations with a slow disk (and lots of tags, for example) it can take several very annoying seconds (7.5s according to a report by Carlos R. Mafra). This avoids most of it by simply doing the filtering before looking up the commits, by using the "raw" version of for_each_ref. Reported-by: Carlos R. Mafra <crmafra2@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | parse-opts: prepare for OPT_FILENAMEStephen Boyd2009-05-25
| | | | | | | | | | | | | | | | | | | | To give OPT_FILENAME the prefix, we pass the prefix to parse_options() which passes the prefix to parse_options_start() which sets the prefix member of parse_opts_ctx accordingly. If there isn't a prefix in the calling context, passing NULL will suffice. Signed-off-by: Stephen Boyd <bebarino@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | allow -t abbreviation for --track in git branchSitaram Chamarty2009-05-09
|/ | | | | | also makes it consistent with git-checkout Signed-off-by: Junio C Hamano <gitster@pobox.com>
* shorten_unambiguous_ref(): add strict modeBert Wesarg2009-04-13
| | | | | | | | | | Add the strict mode of abbreviation to shorten_unambiguous_ref(), i.e. the resulting ref won't trigger the ambiguous ref warning. All users of shorten_unambiguous_ref() still use the loose mode. Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* branch: show upstream branch when double verboseJeff King2009-04-07
| | | | | | | | | | This information is easily accessible when we are calculating the relationship. The only reason not to print it all the time is that it consumes a fair bit of screen space, and may not be of interest to the user. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'jc/name-branch'Junio C Hamano2009-04-06
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | * jc/name-branch: Don't permit ref/branch names to end with ".lock" check_ref_format(): tighten refname rules strbuf_check_branch_ref(): a helper to check a refname for a branch Fix branch -m @{-1} newname check-ref-format --branch: give Porcelain a way to grok branch shorthand strbuf_branchname(): a wrapper for branch name shorthands Rename interpret/substitute nth_last_branch functions Conflicts: Documentation/git-check-ref-format.txt
| * check_ref_format(): tighten refname rulesJunio C Hamano2009-03-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This changes the rules for refnames to forbid: (1) a refname that contains "@{" in it. Some people and foreign SCM converter may have named their branches as frotz@24 and we still want to keep supporting it. However, "git branch frotz@{24}" is a disaster. It cannot even checked out because "git checkout frotz@{24}" will interpret it as "detach the HEAD at twenty-fourth reflog entry of the frotz branch". (2) a refname that ends with a dot. We already reject a path component that begins with a dot, primarily to avoid ambiguous range interpretation. If we allowed ".B" as a valid ref, it is unclear if "A...B" means "in dot-B but not in A" or "either in A or B but not in both". But for this to be complete, we need also to forbid "A." to avoid "in B but not in A-dot". This was not a problem in the original range notation, but we should have added this restriction when three-dot notation was introduced. Unlike "no dot at the beginning of any path component" rule, this rule does not have to be "no dot at the end of any path component", because you cannot abbreviate the tail end away, similar to you can say "dot-B" to mean "refs/heads/dot-B". For these reasons, it is not likely people created branches with these names on purpose, but we have allowed such names to be used for quite some time, and it is possible that people created such branches by mistake or by accident. To help people with branches with such unfortunate names to recover, we still allow "branch -d 'bad.'" to delete such branches, and also allow "branch -m bad. good" to rename them. Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * strbuf_check_branch_ref(): a helper to check a refname for a branchJunio C Hamano2009-03-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This allows a common calling sequence strbuf_branchname(&ref, name); strbuf_splice(&ref, 0, 0, "refs/heads/", 11); if (check_ref_format(ref.buf)) die(...); to be refactored into if (strbuf_check_branch_ref(&ref, name)) die(...); Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * Fix branch -m @{-1} newnameJunio C Hamano2009-03-22
| | | | | | | | | | | | | | | | The command is supposed to rename the branch we were on before switched from to a new name, but was not aware of the short-hand notation we added recently. Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * strbuf_branchname(): a wrapper for branch name shorthandsJunio C Hamano2009-03-22
| | | | | | | | | | | | | | | | | | | | The function takes a user-supplied string that is supposed to be a branch name, and puts it in a strbuf after expanding possible shorthand notation. A handful of open coded sequence to do this in the existing code have been changed to use this helper function. Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * Rename interpret/substitute nth_last_branch functionsJunio C Hamano2009-03-22
| | | | | | | | | | | | | | | | | | | | | | These allow you to say "git checkout @{-2}" to switch to the branch two "branch switching" ago by pretending as if you typed the name of that branch. As it is likely that we will be introducing more short-hands to write the name of a branch without writing it explicitly, rename the functions from "nth_last_branch" to more generic "branch_name", to prepare for different semantics. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Merge branch 'bc/maint-1.6.1-branch-deleted-was'Junio C Hamano2009-03-26
|\ \ | |/ |/| | | | | | | | | | | * bc/maint-1.6.1-branch-deleted-was: git-branch: display "was sha1" on branch deletion rather than just "sha1" Conflicts: builtin-branch.c
| * git-branch: display "was sha1" on branch deletion rather than just "sha1"Brandon Casey2009-03-21
| | | | | | | | | | | | | | | | | | | | Make it more pleasant to read about a branch deletion by adding "was". Jeff King suggested this, and I ignored it. He was right. Update t3200 test again to match the change in output. Signed-off-by: Brandon Casey <drafnel@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Merge branch 'js/branch-symref'Junio C Hamano2009-03-05
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * js/branch-symref: add basic branch display tests branch: clean up repeated strlen Avoid segfault with 'git branch' when the HEAD is detached builtin-branch: improve output when displaying remote branches Conflicts: builtin-branch.c
| * | branch: clean up repeated strlenJeff King2009-02-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 45e2b61 fixed the initialization of a "len" struct parameter via strlen. We can use that to clean up what is now 3 strlens in a 6-line sequence. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | Avoid segfault with 'git branch' when the HEAD is detachedJohannes Schindelin2009-02-18
| | | | | | | | | | | | | | | | | | | | | | | | A recent addition to the ref_item struct was not taken care of, leading to a segmentation fault when accessing the (uninitialized) "dest" member. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | builtin-branch: improve output when displaying remote branchesJay Soffian2009-02-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When encountering a symref (typically refs/remotes/<remote>/HEAD), display the ref target. When displaying local and remote branches, prefix the remote branch names with "remotes/" to make the remote branches clear from the local branches. If displaying only the remote branches, the prefix is not shown since it would be redundant. Sample output: $ git branch foo -> master * master rather-long-branch-name $ git branch -v foo -> master * master 51cecb2 initial rather-long-branch-name 51cecb2 initial $ git branch -v --no-abbrev foo -> master * master 51cecb2dbb1a1902bb4df79b543c8f951ee59d83 initial rather-long-branch-name 51cecb2dbb1a1902bb4df79b543c8f951ee59d83 initial $ git branch -r frotz/HEAD -> frotz/master frotz/master origin/HEAD -> origin/master origin/UNUSUAL -> refs/heads/master origin/master $ git branch -a foo -> master * master rather-long-branch-name remotes/frotz/HEAD -> frotz/master remotes/frotz/master remotes/origin/HEAD -> origin/master remotes/origin/UNUSUAL -> refs/heads/master remotes/origin/master $ git branch -rv frotz/HEAD -> frotz/master frotz/master e1d8130 added file2 origin/HEAD -> origin/master origin/UNUSUAL -> refs/heads/master origin/master e1d8130 added file2 $ git branch -av foo -> master * master 51cecb2 initial rather-long-branch-name 51cecb2 initial remotes/frotz/HEAD -> frotz/master remotes/frotz/master e1d8130 added file2 remotes/origin/HEAD -> origin/master remotes/origin/UNUSUAL -> refs/heads/master remotes/origin/master e1d8130 added file2 Signed-off-by: Jay Soffian <jaysoffian@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | Merge branch 'al/ansi-color'Junio C Hamano2009-03-05
|\ \ \ | | | | | | | | | | | | | | | | | | | | * al/ansi-color: builtin-branch.c: Rename branch category color names Clean up use of ANSI color sequences
| * | | builtin-branch.c: Rename branch category color namesArjen Laarhoven2009-02-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The branch color constants have the form COLOR_BRANCH_$category. Rename them to BRANCH_COLOR_$category as this conveys their meaning better. Signed-off-by: Arjen Laarhoven <arjen@yaph.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | | Clean up use of ANSI color sequencesArjen Laarhoven2009-02-13
| |/ / | | | | | | | | | | | | | | | | | | | | | Remove the literal ANSI escape sequences and replace them by readable constants. Signed-off-by: Arjen Laarhoven <arjen@yaph.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | | Teach the "@{-1} syntax to "git branch"Junio C Hamano2009-02-13
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | This teaches the new "@{-1} syntax to refer to the previous branch to "git branch". After looking at somebody's faulty patch series on a topic branch too long, if you decide it is not worth merging, you can just say: $ git checkout master $ git branch -D @{-1} to get rid of it without having to type the name of the topic you now hate so much for wasting a lot of your time. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Make has_commit() non-staticJake Goulding2009-01-28
| | | | | | | | | | | | | | | | | | Move has_commit() from branch to a common location, in preparation for using it in "git-tag". Rename it to is_descendant_of() to make it more unique and descriptive. Signed-off-by: Jake Goulding <goulding@vivisimo.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Make opt_parse_with_commit() non-staticJake Goulding2009-01-28
|/ | | | | | | | | Moving opt_parse_with_commit() from branch to a common location, in preparation for using it in tag. Rename it to match naming convention of other option parsing functions. Signed-off-by: Jake Goulding <goulding@vivisimo.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* git-branch: display sha1 on branch deletionBrandon Casey2008-12-12
| | | | | | | | | | Make it easier to recover from a mistaken branch deletion by displaying the sha1 of the branch's tip commit. Update t3200 test to match the change in output. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch: use strbuf in rename_branch()Miklos Vajna2008-11-18
| | | | | | | | In case the length of branch name is greather then PATH_MAX-11, we write to unallocated memory otherwise. Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch: use strbuf in fill_tracking_info()Miklos Vajna2008-11-18
| | | | | | | | This is just about using the API, though in case of ~ 10^100 commits, this would fix the problem of writing to unallocated memory as well. ;-) Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch: use strbuf in delete_branches()Miklos Vajna2008-11-18
| | | | | | | | In case the length of branch name is greather then PATH_MAX-7, we write to unallocated memory otherwise. Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'mv/maint-branch-m-symref'Junio C Hamano2008-11-05
|\ | | | | | | | | | | | | | | | | * mv/maint-branch-m-symref: update-ref --no-deref -d: handle the case when the pointed ref is packed git branch -m: forbid renaming of a symref Fix git update-ref --no-deref -d. rename_ref(): handle the case when the reflog of a ref does not exist Fix git branch -m for symrefs.
| * Fix git branch -m for symrefs.Miklos Vajna2008-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | This had two problems with symrefs. First, it copied the actual sha1 instead of the "pointer", second it failed to remove the old ref after a successful rename. Given that till now delete_ref() always dereferenced symrefs, a new parameters has been introduced to delete_ref() to allow deleting refs without a dereference. Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializerBrandon Casey2008-10-12
|/ | | | | | | | | | | Many call sites use strbuf_init(&foo, 0) to initialize local strbuf variable "foo" which has not been accessed since its declaration. These can be replaced with a static initialization using the STRBUF_INIT macro which is just as readable, saves a function call, and takes up fewer lines. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
* builtin-branch: fix -v for --[no-]mergedLars Hjemli2008-07-27
| | | | | | | | | | | After the optimization to --[no-]merged logic, the calculation of the width of the longest refname to be shown might become inaccurate (since the matching against merge_filter is performed after adding refs to ref_list). This patch forces a recalculation of maxwidth when it might be needed. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch: factor out merge_filter matchingLars Hjemli2008-07-27
| | | | | | | | The logic for checking commits against merge_filter will be reused when we recalculate the maxwidth of refnames. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch: remove duplicated codeLars Hjemli2008-07-27
| | | | | | | | The previous optimization to --[no-]merged ended up with some duplicated code which this patch removes. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch.c: optimize --merged and --no-mergedJunio C Hamano2008-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "git branch --no-merged $commit" used to compute the merge base between the tip of each and every branch with the named $commit, but this was wasteful when you have many branches. Inside append_ref() we literally ran has_commit() between the tip of the branch and the merge_filter_ref. Instead, we can let the revision machinery traverse the history as if we are running: $ git rev-list --branches --not $commit by queueing the tips of branches we encounter as positive refs (this mimicks the "--branches" option in the above command line) and then appending the merge_filter_ref commit as a negative one, and finally calling prepare_revision_walk() to limit the list.. After the traversal is done, branch tips that are reachable from $commit are painted UNINTERESTING; they are already fully contained in $commit (i.e. --merged). Tips that are not painted UNINTERESTING still have commits that are not reachable from $commit, thus "--no-merged" will show them. With an artificial repository that has "master" and 1000 test-$i branches where they were created by "git branch test-$i master~$i": (with patch) $ /usr/bin/time git-branch --no-merged master >/dev/null 0.12user 0.02system 0:00.15elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+1588minor)pagefaults 0swaps $ /usr/bin/time git-branch --no-merged test-200 >/dev/null 0.15user 0.03system 0:00.18elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+1711minor)pagefaults 0swaps (without patch) $ /usr/bin/time git-branch --no-merged master >/dev/null 0.69user 0.03system 0:00.72elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2229minor)pagefaults 0swaps $ /usr/bin/time git-branch --no-merged test-200 >/dev/null 0.58user 0.03system 0:00.61elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2248minor)pagefaults 0swaps Signed-off-by: Junio C Hamano <gitster@pobox.com>
* builtin-branch.c: remove unused code in append_ref() callback functionJunio C Hamano2008-07-23
| | | | | | | We let for_each_ref() to feed all refs to append_ref() but we are only ever interested in local or remote tracking branches. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'sb/dashless'Junio C Hamano2008-07-16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * sb/dashless: Make usage strings dash-less t/: Use "test_must_fail git" instead of "! git" t/test-lib.sh: exit with small negagive int is ok with test_must_fail Conflicts: builtin-blame.c builtin-mailinfo.c builtin-mailsplit.c builtin-shortlog.c git-am.sh t/t4150-am.sh t/t4200-rerere.sh
| * Make usage strings dash-lessStephan Beyer2008-07-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When you misuse a git command, you are shown the usage string. But this is currently shown in the dashed form. So if you just copy what you see, it will not work, when the dashed form is no longer supported. This patch makes git commands show the dash-less version. For shell scripts that do not specify OPTIONS_SPEC, git-sh-setup.sh generates a dash-less usage string now. Signed-off-by: Stephan Beyer <s-beyer@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | Merge branch 'jc/branch-merged'Junio C Hamano2008-07-14
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | * jc/branch-merged: branch --merged/--no-merged: allow specifying arbitrary commit branch --contains: default to HEAD parse-options: add PARSE_OPT_LASTARG_DEFAULT flag Conflicts: Documentation/git-branch.txt
| * | branch --merged/--no-merged: allow specifying arbitrary commitJunio C Hamano2008-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "git-branch --merged" is a handy way to list all the branches that have already been merged to the current branch, but it did not allow checking against anything but the current branch. Having to switch branches only to list the branches that are merged with another branch made the feature practically useless. This updates the option parser so that "git branch --merged next" is accepted when you are on 'master' branch. Signed-off-by: Junio C Hamano <gitster@pobox.com>
| * | branch --contains: default to HEADJunio C Hamano2008-07-09
| |/ | | | | | | | | | | | | | | | | | | We used to require the name of the commit to limit the branches shown to the --contains option, but more recent --merged/--no-meregd defaults to HEAD (and they do not allow arbitrary commit, which is a separate issue). This teaches --contains to default to HEAD when no parameter is given. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | branch -r -v: do not spit out garbageJunio C Hamano2008-07-06
| | | | | | | | | | | | | | | | | | The codepath to emit relationship between the branch and what it tracks forgot to initialize a string buffer stat[] to empty when showing a tracking branch. This moves the emptying so that the buffer starts as empty and stays so when no information is added to fix this issue. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* | git-branch -v: show the remote tracking statisticsJunio C Hamano2008-07-02
|/ | | | | | | This teaches "git branch -v" to insert the remote tracking statistics in brackets, just before the one-liner commit log message for the branch. Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Provide git_config with a callback-data parameterJohannes Schindelin2008-05-14
| | | | | | | | | | | | git_config() only had a function parameter, but no callback data parameter. This assumes that all callback functions only modify global variables. With this patch, every callback gets a void * parameter, and it is hoped that this will help the libification effort. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* git-branch: add support for --merged and --no-mergedLars Hjemli2008-04-20
| | | | | | | | | | | | | | | | These options filter the output from git branch to only include branches whose tip is either merged or not merged into HEAD. The use-case for these options is when working with integration of branches from many remotes: `git branch --no-merged -a` will show a nice list of merge candidates while `git branch --merged -a` will show the progress of your integration work. Also, a plain `git branch --merged` is a quick way to find local branches which you might want to delete. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
* Merge branch 'jm/free'Junio C Hamano2008-02-27
|\ | | | | | | | | | | | | | | | | * jm/free: Avoid unnecessary "if-before-free" tests. Conflicts: builtin-branch.c
| * Avoid unnecessary "if-before-free" tests.Jim Meyering2008-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change removes all obvious useless if-before-free tests. E.g., it replaces code like this: if (some_expression) free (some_expression); with the now-equivalent: free (some_expression); It is equivalent not just because POSIX has required free(NULL) to work for a long time, but simply because it has worked for so long that no reasonable porting target fails the test. Here's some evidence from nearly 1.5 years ago: http://www.winehq.org/pipermail/wine-patches/2006-October/031544.html FYI, the change below was prepared by running the following: git ls-files -z | xargs -0 \ perl -0x3b -pi -e \ 's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*NULL)?\s*\)\s+(free\s*\(\s*\1\s*\))/$2/s' Note however, that it doesn't handle brace-enclosed blocks like "if (x) { free (x); }". But that's ok, since there were none like that in git sources. Beware: if you do use the above snippet, note that it can produce syntactically invalid C code. That happens when the affected "if"-statement has a matching "else". E.g., it would transform this if (x) free (x); else foo (); into this: free (x); else foo (); There were none of those here, either. If you're interested in automating detection of the useless tests, you might like the useless-if-before-free script in gnulib: [it *does* detect brace-enclosed free statements, and has a --name=S option to make it detect free-like functions with different names] http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=build-aux/useless-if-before-free Addendum: Remove one more (in imap-send.c), spotted by Jean-Luc Herren <jlh@gmx.ch>. Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-27 11:50:05 +0000