path: root/grep.c
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2012-03-07Merge branch 'jc/pickaxe-ignore-case'Junio C Hamano
By Junio C Hamano (2) and Ramsay Jones (1) * jc/pickaxe-ignore-case: ctype.c: Fix a sparse warning pickaxe: allow -i to search in patch case-insensitively grep: use static trans-case table
2012-02-28grep: use static trans-case tableJunio C Hamano
In order to prepare the kwset machinery for a case-insensitive search, we used to use a static table of 256 elements and filled it every time before calling kwsalloc(). Because the kwset machinery will never modify this table, just allocate a single instance globally and fill it at the compile time. Signed-off-by: Junio C Hamano <>
2012-02-27Sync with C Hamano
2012-02-27grep -P: Fix matching ^ and $Michał Kiedrowicz
When "git grep" is run with -P/--perl-regexp, it doesn't match ^ and $ at the beginning/end of the line. This is because PCRE normally matches ^ and $ at the beginning/end of the whole text, not for each line, and "git grep" passes a large chunk of text (possibly containing many lines) to pcre_exec() and then splits the text into lines. This makes "git grep -P" behave differently from "git grep -E" and also from "grep -P" and "pcregrep": $ cat file a b $ git grep --no-index -P '^ ' file $ git grep --no-index -E '^ ' file file: b $ grep -c -P '^ ' file b $ pcregrep -c '^ ' file b Reported-by: Zbigniew Jędrzejewski-Szmek <> Signed-off-by: Michał Kiedrowicz <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: load file data after checking binary-nessJeff King
Usually we load each file to grep into memory, check whether it's binary, and then either grep it (the default) or not (if "-I" was given). In the "-I" case, we can skip loading the file entirely if it is marked as binary via gitattributes. On my giant 3-gigabyte media repository, doing "git grep -I foo" went from: real 0m0.712s user 0m0.044s sys 0m4.780s to: real 0m0.026s user 0m0.016s sys 0m0.020s Obviously this is an extreme example. The repo is almost entirely binary files, and you can see that we spent all of our time asking the kernel to read() the data. However, with a cold disk cache, even avoiding a few binary files can have an impact. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: respect diff attributes for binary-nessJeff King
There is currently no way for users to tell git-grep that a particular path is or is not a binary file; instead, grep always relies on its auto-detection (or the user specifying "-a" to treat all binary-looking files like text). This patch teaches git-grep to use the same attribute lookup that is used by git-diff. We could add a new "grep" flag, but that is unnecessarily complex and unlikely to be useful. Despite the name, the "-diff" attribute (or "diff=foo" and the associated config option) are really about describing the contents of the path. It's simply historical that diff was the only thing that cared about these attributes in the past. And if this simple approach turns out to be insufficient, we still have a backwards-compatible path forward: we can add a separate "grep" attribute, and fall back to respecting "diff" if it is unset. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: cache userdiff_driver in grep_sourceJeff King
Right now, grep only uses the userdiff_driver for one thing: looking up funcname patterns for "-p" and "-W". As new uses for userdiff drivers are added to the grep code, we want to minimize attribute lookups, which can be expensive. It might seem at first that this would also optimize multiple lookups when the funcname pattern for a file is needed multiple times. However, the compiled funcname pattern is already cached in struct grep_opt's "priv" member, so multiple lookups are already suppressed. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: drop grep_buffer's "name" parameterJeff King
Before the grep_source interface existed, grep_buffer was used by two types of callers: 1. Ones which pulled a file into a buffer, and then wanted to supply the file's name for the output (i.e., git grep). 2. Ones which really just wanted to grep a buffer (i.e., git log --grep). Callers in set (1) should now be using grep_source. Callers in set (2) always pass NULL for the "name" parameter of grep_buffer. We can therefore get rid of this now-useless parameter. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: refactor the concept of "grep source" into an objectJeff King
The main interface to the low-level grep code is grep_buffer, which takes a pointer to a buffer and a size. This is convenient and flexible (we use it to grep commit bodies, files on disk, and blobs by sha1), but it makes it hard to pass extra information about what we are grepping (either for correctness, like overriding binary auto-detection, or for optimizations, like lazily loading blob contents). Instead, let's encapsulate the idea of a "grep source", including the buffer, its size, and where the data is coming from. This is similar to the diff_filespec structure used by the diff code (unsurprising, since future patches will implement some of the same optimizations found there). The diffstat is slightly scarier than the actual patch content. Most of the modified lines are simply replacing access to raw variables with their counterparts that are now in a "struct grep_source". Most of the added lines were taken from builtin/grep.c, which partially abstracted the idea of grep sources (for file vs sha1 sources). Instead of dropping the now-redundant code, this patch leaves builtin/grep.c using the traditional grep_buffer interface (which now wraps the grep_source interface). That makes it easy to test that there is no change of behavior (yet). Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: move sha1-reading mutex into low-level codeJeff King
The multi-threaded git-grep code needs to serialize access to the thread-unsafe read_sha1_file call. It does this with a mutex that is local to builtin/grep.c. Let's instead push this down into grep.c, where it can be used by both builtin/grep.c and grep.c. This will let us safely teach the low-level grep.c code tricks that involve reading from the object db. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2012-02-02grep: make locking flag globalJeff King
The low-level grep code traditionally didn't care about threading, as it doesn't do any threading itself and didn't call out to other non-thread-safe code. That changed with 0579f91 (grep: enable threading with -p and -W using lazy attribute lookup, 2011-12-12), which pushed the lookup of funcname attributes (which is not thread-safe) into the low-level grep code. As a result, the low-level code learned about a new global "grep_attr_mutex" to serialize access to the attribute code. A multi-threaded caller (e.g., builtin/grep.c) is expected to initialize the mutex and set "use_threads" in the grep_opt structure. The low-level code only uses the lock if use_threads is set. However, putting the use_threads flag into the grep_opt struct is not the most logical place. Whether threading is in use is not something that matters for each call to grep_buffer, but is instead global to the whole program (i.e., if any thread is doing multi-threaded grep, every other thread, even if it thinks it is doing its own single-threaded grep, would need to use the locking). In practice, this distinction isn't a problem for us, because the only user of multi-threaded grep is "git-grep", which does nothing except call grep. This patch turns the opt->use_threads flag into a global flag. More important than the nit-picking semantic argument above is that this means that the locking functions don't need to actually have access to a grep_opt to know whether to lock. Which in turn can make adding new locks simpler, as we don't need to pass around a grep_opt. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2011-12-16grep: enable threading with -p and -W using lazy attribute lookupThomas Rast
Lazily load the userdiff attributes in match_funcname(). Use a separate mutex around this loading to protect the (not thread-safe) attributes machinery. This lets us re-enable threading with -p and -W while reducing the overhead caused by looking up attributes. Signed-off-by: Thomas Rast <> Signed-off-by: Junio C Hamano <>
2011-12-12grep: load funcname patterns for -WThomas Rast
git-grep avoids loading the funcname patterns unless they are needed. ba8ea74 (grep: add option to show whole function as context, 2011-08-01) forgot to extend this test also to the new funcbody feature. Do so. The catch is that we also have to disable threading when using userdiff, as explained in grep_threads_ok(). So we must be careful to introduce the same test there. Signed-off-by: Thomas Rast <> Signed-off-by: Junio C Hamano <>
2011-09-02Merge branch 'fk/use-kwset-pickaxe-grep-f'Junio C Hamano
* fk/use-kwset-pickaxe-grep-f: obstack: Fix portability issues Use kwset in grep Use kwset in pickaxe Adapt the kwset code to Git Add string search routines from GNU grep Add obstack.[ch] from EGLIBC 2.10
2011-08-29Merge branch 'jk/color-and-pager'Junio C Hamano
* jk/color-and-pager: want_color: automatically fallback to color.ui diff: don't load color config in plumbing config: refactor get_colorbool function color: delay auto-color decision until point of use git_config_colorbool: refactor stdout_is_tty handling diff: refactor COLOR_DIFF from a flag into an int setup_pager: set GIT_PAGER_IN_USE t7006: use test_config helpers test-lib: add helper functions for config t7006: modernize calls to unset Conflicts: builtin/commit.c parse-options.c
2011-08-21Use kwset in grepFredrik Kuivinen
Benchmarks for the hot cache case: before: $ perf stat --repeat=5 git grep qwerty > /dev/null Performance counter stats for 'git grep qwerty' (5 runs): 3,478,085 cache-misses # 2.322 M/sec ( +- 2.690% ) 11,356,177 cache-references # 7.582 M/sec ( +- 2.598% ) 3,872,184 branch-misses # 0.363 % ( +- 0.258% ) 1,067,367,848 branches # 712.673 M/sec ( +- 2.622% ) 3,828,370,782 instructions # 0.947 IPC ( +- 0.033% ) 4,043,832,831 cycles # 2700.037 M/sec ( +- 0.167% ) 8,518 page-faults # 0.006 M/sec ( +- 3.648% ) 847 CPU-migrations # 0.001 M/sec ( +- 3.262% ) 6,546 context-switches # 0.004 M/sec ( +- 2.292% ) 1497.695495 task-clock-msecs # 3.303 CPUs ( +- 2.550% ) 0.453394396 seconds time elapsed ( +- 0.912% ) after: $ perf stat --repeat=5 git grep qwerty > /dev/null Performance counter stats for 'git grep qwerty' (5 runs): 2,989,918 cache-misses # 3.166 M/sec ( +- 5.013% ) 10,986,041 cache-references # 11.633 M/sec ( +- 4.899% ) (scaled from 95.06%) 3,511,993 branch-misses # 1.422 % ( +- 0.785% ) 246,893,561 branches # 261.433 M/sec ( +- 3.967% ) 1,392,727,757 instructions # 0.564 IPC ( +- 0.040% ) 2,468,142,397 cycles # 2613.494 M/sec ( +- 0.110% ) 7,747 page-faults # 0.008 M/sec ( +- 3.995% ) 897 CPU-migrations # 0.001 M/sec ( +- 2.383% ) 6,535 context-switches # 0.007 M/sec ( +- 1.993% ) 944.384228 task-clock-msecs # 3.177 CPUs ( +- 0.268% ) 0.297257643 seconds time elapsed ( +- 0.450% ) So we gain about 35% by using the kwset code. As a side effect of using kwset two grep tests are fixed by this patch. The first is fixed because kwset can deal with case-insensitive search containing NULs, something strcasestr cannot do. The second one is fixed because we consider patterns containing NULs as fixed strings (regcomp cannot accept patterns with NULs). Signed-off-by: Fredrik Kuivinen <> Signed-off-by: Junio C Hamano <>
2011-08-19color: delay auto-color decision until point of useJeff King
When we read a color value either from a config file or from the command line, we use git_config_colorbool to convert it from the tristate always/never/auto into a single yes/no boolean value. This has some timing implications with respect to starting a pager. If we start (or decide not to start) the pager before checking the colorbool, everything is fine. Either isatty(1) will give us the right information, or we will properly check for pager_in_use(). However, if we decide to start a pager after we have checked the colorbool, things are not so simple. If stdout is a tty, then we will have already decided to use color. However, the user may also have configured color.pager not to use color with the pager. In this case, we need to actually turn off color. Unfortunately, the pager code has no idea which color variables were turned on (and there are many of them throughout the code, and they may even have been manipulated after the colorbool selection by something like "--color" on the command line). This bug can be seen any time a pager is started after config and command line options are checked. This has affected "git diff" since 89d07f7 (diff: don't run pager if user asked for a diff style exit code, 2007-08-12). It has also affect the log family since 1fda91b (Fix 'git log' early pager startup error case, 2010-08-24). This patch splits the notion of parsing a colorbool and actually checking the configuration. The "use_color" variables now have an additional possible value, GIT_COLOR_AUTO. Users of the variable should use the new "want_color()" wrapper, which will lazily determine and cache the auto-color decision. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2011-08-01grep: add option to show whole function as contextRené Scharfe
Add a new option, -W, to show the whole surrounding function of a match. It uses the same regular expressions as -p and diff to find the beginning of sections. Currently it will not display comments in front of a function, but those that are following one. Despite this shortcoming it is already useful, e.g. to simply see a more complete applicable context or to extract whole functions. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2011-06-06grep: add --headingRené Scharfe
With --heading, the filename is printed once before matches from that file instead of at the start of each line, giving more screen space to the actual search results. This option is taken from ack ( And now git grep can dress up like it: $ git config alias.ack "grep --break --heading --line-number" $ git ack -e --heading Documentation/git-grep.txt 154:--heading:: t/ 785:test_expect_success 'grep --heading' ' 786: git grep --heading -e char -e lo_w hello.c hello_world >actual && 808: git grep --break --heading -n --color \ Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2011-06-06grep: add --breakRené Scharfe
With --break, an empty line is printed between matches from different files, increasing readability. This option is taken from ack ( Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2011-06-06grep: fix coloring of hunk marks between filesRené Scharfe
Commit 431d6e7b (grep: enable threading for context line printing) split the printing of the "--\n" mark between results from different files out into two places: show_line() in grep.c for the non-threaded case and work_done() in builtin/grep.c for the threaded case. Commit 55f638bd (grep: Colorize filename, line number, and separator) updated the former, but not the latter, so the separators between files are not colored if threads are used. This patch merges the two. In the threaded case, hunk marks are now printed by show_line() for every file, including the first one, and the very first mark is simply skipped in work_done(). This ensures that the output is properly colored and works just as well. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2011-05-09git-grep: Learn PCREMichał Kiedrowicz
This patch teaches git-grep the --perl-regexp/-P options (naming borrowed from GNU grep) in order to allow specifying PCRE regexes on the command line. PCRE has a number of features which make them more handy to use than POSIX regexes, like consistent escaping rules, extended character classes, ungreedy matching etc. git isn't build with PCRE support automatically. USE_LIBPCRE environment variable must be enabled (like `make USE_LIBPCRE=YesPlease`). Signed-off-by: Michał Kiedrowicz <> Signed-off-by: Junio C Hamano <>
2011-05-09grep: Extract compile_regexp_failed() from compile_regexp()Michał Kiedrowicz
This simplifies compile_regexp() a little and allows re-using error handling code. Signed-off-by: Michał Kiedrowicz <> Signed-off-by: Junio C Hamano <>
2011-05-09grep: Fix a typo in a commentMichał Kiedrowicz
Signed-off-by: Michał Kiedrowicz <> Signed-off-by: Junio C Hamano <>
2011-05-05grep: Put calls to fixmatch() and regmatch() into patmatch()Michał Kiedrowicz
Both match_one_pattern() and look_ahead() use fixmatch() and regmatch() in the same way. They really want to match a pattern againt a string, but now they need to know if the pattern is fixed or regexp. This change cleans this up by introducing patmatch() (from "pattern match") and also simplifies inserting other ways of matching a string. Signed-off-by: Michał Kiedrowicz <> Signed-off-by: Junio C Hamano <>
2010-09-13log --author: take union of multiple "author" requestsJunio C Hamano
In the olden days, log --author=me --committer=him --grep=this --grep=that used to be turned into: (OR (HEADER-AUTHOR me) (HEADER-COMMITTER him) (PATTERN this) (PATTERN that)) showing my patches that do not have any "this" nor "that", which was totally useless. 80235ba ("log --author=me --grep=it" should find intersection, not union, 2010-01-17) improved it greatly to turn the same into: (ALL-MATCH (HEADER-AUTHOR me) (HEADER-COMMITTER him) (OR (PATTERN this) (PATTERN that))) That is, "show only patches by me and committed by him, that have either this or that", which is a lot more natural thing to ask. We however need to be a bit more clever when the user asks more than one "author" (or "committer"); because a commit has only one author (and one committer), they ought to be interpreted as asking for union to be useful. The current implementation simply added another author/committer pattern at the same top-level for ALL-MATCH to insist on matching all, finding nothing. Turn log --author=me --author=her \ --committer=him --committer=you \ --grep=this --grep=that into (ALL-MATCH (OR (HEADER-AUTHOR me) (HEADER-AUTHOR her)) (OR (HEADER-COMMITTER him) (HEADER-COMMITTER you)) (OR (PATTERN this) (PATTERN that))) instead. Signed-off-by: Junio C Hamano <>
2010-09-13grep: move logic to compile header pattern into a separate helperJunio C Hamano
The callers should be queuing only GREP_PATTERN_HEAD elements to the header_list queue; simplify the switch and guard it with an assert. Signed-off-by: Junio C Hamano <>
2010-05-24grep: support NUL chars in search strings for -FRené Scharfe
Search patterns in a file specified with -f can contain NUL characters. The current code ignores all characters on a line after a NUL. Pass the actual length of the line all the way from the pattern file to fixmatch() and use it for case-sensitive fixed string matching. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-05-24grep: use REG_STARTEND for all matching if availableRené Scharfe
Refactor REG_STARTEND handling inlook_ahead() into a new helper, regmatch(), and use it for line matching, too. This allows regex matching beyond NUL characters if regexec() supports the flag. NUL characters themselves are not matched in any way, though. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-05-24grep: continue case insensitive fixed string search after NUL charsRené Scharfe
Functions for C strings, like strcasestr(), can't see beyond NUL characters. Check if there is such an obstacle on the line and try again behind it. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-05-24grep: use memmem() for fixed string searchRené Scharfe
Allow searching beyond NUL characters by using memmem() instead of strstr(). Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-05-24grep: --name-only over binaryRené Scharfe
As with the option -c/--count, git grep with the option -l/--name-only should work the same with binary files as with text files because there is no danger of messing up the terminal with control characters from the contents of matching files. GNU grep does the same. Move the check for ->name_only before the one for binary_match_only, thus making the latter irrelevant for git grep -l. Reported-by: Dmitry Potapov <> Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-05-24grep: --count over binaryRené Scharfe
The intent of showing the message "Binary file xyz matches" for binary files is to avoid annoying users by potentially messing up their terminals by printing control characters. In --count mode, this precaution isn't necessary. Display counts of matches if -c/--count was specified, even if -a was not given. GNU grep does the same. Moving the check for ->count before the code for handling binary file also avoids printing context lines if --count and -[ABC] were used together, so we can remove the part of the comment that mentions this behaviour. Again, GNU grep does the same. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-05-24grep: grep: refactor handling of binary mode optionsRené Scharfe
Turn the switch inside-out and add labels for each possible value of ->binary. This makes the code easier to read and avoids calling buffer_is_binary() if the option -a was given. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-04-03Merge branch 'rs/threaded-grep-context'Junio C Hamano
* rs/threaded-grep-context: grep: enable threading for context line printing Conflicts: grep.c
2010-03-20Merge branch 'ml/color-grep'Junio C Hamano
* ml/color-grep: grep: Colorize selected, context, and function lines grep: Colorize filename, line number, and separator Add GIT_COLOR_BOLD_* and GIT_COLOR_BG_*
2010-03-15grep: enable threading for context line printingRené Scharfe
If context lines are to be printed, grep separates them with hunk marks ("--\n"). These marks are printed between matches from different files, too. They are not printed before the first file, though. Threading was disabled when context line printing was enabled because avoiding to print the mark before the first line was an unsolved synchronisation problem. This patch separates the code for printing hunk marks for the threaded and the unthreaded case, allowing threading to be turned on together with the common -ABC options. ->show_hunk_mark, which controls printing of hunk marks between files in show_line(), is now set in grep_buffer_1(), but only if some results have already been printed and threading is disabled. The threaded case is handled in work_done(). Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-03-08grep: Colorize selected, context, and function linesMark Lodato
Colorize non-matching text of selected lines, context lines, and function name lines. The default for all three is no color, but they can be configured using color.grep.<slot>. The first two are similar to the corresponding options in GNU grep, except that GNU grep applies the color to the entire line, not just non-matching text. Signed-off-by: Mark Lodato <> Signed-off-by: Junio C Hamano <>
2010-03-08grep: Colorize filename, line number, and separatorMark Lodato
Colorize the filename, line number, and separator in git grep output, as GNU grep does. The colors are customizable through color.grep.<slot>. The default is to only color the separator (in cyan), since this gives the biggest legibility increase without overwhelming the user with colors. GNU grep also defaults cyan for the separator, but defaults to magenta for the filename and to green for the line number, as well. There is one difference from GNU grep: When a binary file matches without -a, GNU grep does not color the <file> in "Binary file <file> matches", but we do. Like GNU grep, if --null is given, the null separators are not colored. For config.txt, use a a sub-list to describe the slots, rather than a single paragraph with parentheses, since this is much more readable. Remove the cast to int for `rm_eo - rm_so` since it is not necessary. Signed-off-by: Mark Lodato <> Signed-off-by: Junio C Hamano <>
2010-03-02Merge branch 'jc/grep-author-all-match-implicit'Junio C Hamano
* jc/grep-author-all-match-implicit: "log --author=me --grep=it" should find intersection, not union
2010-02-03grep: simplify assignment of ->fixedRené Scharfe
After 885d211e, the value of the ->fixed pattern option only depends on the grep option of the same name. Regex flags don't matter any more, because fixed mode and regex mode are strictly separated. Thus we can simply copy the value from struct grep_opt to struct grep_pat, as we do already for ->word_regexp and ->ignore_case. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2010-01-28Merge branch 'fk/threaded-grep'Junio C Hamano
* fk/threaded-grep: Threaded grep grep: expose "status-only" feature via -q
2010-01-26grep: use REG_STARTEND (if available) to speed up regexecBenjamin Kramer
BSD and glibc have an extension to regexec which takes a buffer + length pair instead of a NUL-terminated string. Since we already have the length computed this can save us a strlen call inside regexec. Signed-off-by: Benjamin Kramer <> Acked-by: Linus Torvalds <> Signed-off-by: Junio C Hamano <>
2010-01-26Threaded grepFredrik Kuivinen
Make git grep use threads when it is available. The results below are best of five runs in the Linux repository (on a box with two cores). With the patch: git grep qwerty 1.58user 0.55system 0:01.16elapsed 183%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+800outputs (0major+5774minor)pagefaults 0swaps Without: git grep qwerty 1.59user 0.43system 0:02.02elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+800outputs (0major+3716minor)pagefaults 0swaps And with a pattern with quite a few matches: With the patch: $ /usr/bin/time git grep void 5.61user 0.56system 0:03.44elapsed 179%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+800outputs (0major+5587minor)pagefaults 0swaps Without: $ /usr/bin/time git grep void 5.36user 0.51system 0:05.87elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+800outputs (0major+3693minor)pagefaults 0swaps In either case we gain about 40% by the threading. Signed-off-by: Fredrik Kuivinen <> Signed-off-by: Junio C Hamano <>
2010-01-26"log --author=me --grep=it" should find intersection, not unionJunio C Hamano
Historically, any grep filter in "git log" family of commands were taken as restricting to commits with any of the words in the commit log message. However, the user almost always want to find commits "done by this person on that topic". With "--all-match" option, a series of grep patterns can be turned into a requirement that all of them must produce a match, but that makes it impossible to ask for "done by me, on either this or that" with: log --author=me --committer=him --grep=this --grep=that because it will require both "this" and "that" to appear. Change the "header" parser of grep library to treat the headers specially, and parse it as: (all-match-OR (HEADER-AUTHOR me) (HEADER-COMMITTER him) (OR (PATTERN this) (PATTERN that) ) ) Even though the "log" command line parser doesn't give direct access to the extended grep syntax to group terms with parentheses, this change will cover the majority of the case the users would want. This incidentally revealed that one test in t7002 was bogus. It ran: log --author=Thor --grep=Thu --format='%s' and expected (wrongly) "Thu" to match "Thursday" in the author/committer date, but that would never match, as the timestamp in raw commit buffer does not have the name of the day-of-the-week. Signed-off-by: Junio C Hamano <>
2010-01-13grep: rip out pessimization to use fixmatch()Junio C Hamano
Even when running without the -F (--fixed-strings) option, we checked the pattern and used fixmatch() codepath when it does not contain any regex magic. Finding fixed strings with strstr() surely must be faster than running the regular expression crud. Not so. It turns out that on some libc implementations, using the regcomp()/regexec() pair is a lot faster than running strstr() and strcasestr() the fixmatch() codepath uses. Drop the optimization and use the fixmatch() codepath only when the user explicitly asked for it with the -F option. Signed-off-by: Junio C Hamano <>
2010-01-12Merge branch 'jc/maint-1.6.4-grep-lookahead' into jc/maint-grep-lookaheadJunio C Hamano
* jc/maint-1.6.4-grep-lookahead: grep: optimize built-in grep by skipping lines that do not hit This needs to be an evil merge as fixmatch() changed signature since 5183bf6 (grep: Allow case insensitive search of fixed-strings, 2009-11-06). Signed-off-by: Junio C Hamano <>
2010-01-12grep: optimize built-in grep by skipping lines that do not hitJunio C Hamano
The internal "grep" engine we use checks for hits line-by-line, instead of letting the underlying regexec()/fixmatch() routines scan for the first match from the rest of the buffer. This was a major source of overhead compared to the external grep. Introduce a "look-ahead" mechanism to find the next line that would potentially match by using regexec()/fixmatch() in the remainder of the text to skip unmatching lines, and use it when the query criteria is simple enough (i.e. punt for an advanced grep boolean expression like "lines that have both X and Y but not Z" for now) and we are not running under "-v" (aka "--invert-match") option. Note that "-L" (aka "--files-without-match") is not a reason to disable this optimization. Under the option, we are interested if the file has any hit at all, and that is what we determine reliably with or without the optimization. Signed-off-by: Junio C Hamano <>
2009-11-17grep: Allow case insensitive search of fixed-stringsBrian Collins
"git grep" currently an error when you combine the -F and -i flags. This isn't in line with how GNU grep handles it. This patch allows the simultaneous use of those flags. Signed-off-by: Jeff King <> Signed-off-by: Brian Collins <> Signed-off-by: Junio C Hamano <>
2009-07-03grep: simplify -p outputRené Scharfe
It was found a bit too loud to show == separators between the function headers. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>