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2013-10-23Merge branch 'mg/more-textconv'Junio C Hamano
Make "git grep" and "git show" pay attention to --textconv when dealing with blob objects. * mg/more-textconv: grep: honor --textconv for the case rev:path grep: allow to use textconv filters t7008: demonstrate behavior of grep with textconv cat-file: do not die on --textconv without textconv filters show: honor --textconv for blobs diff_opt: track whether flags have been set explicitly t4030: demonstrate behavior of show with textconv
2013-09-09Merge branch 'jl/submodule-mv'Junio C Hamano
"git mv A B" when moving a submodule A does "the right thing", inclusing relocating its working tree and adjusting the paths in the .gitmodules file. * jl/submodule-mv: (53 commits) rm: delete .gitmodules entry of submodules removed from the work tree mv: update the path entry in .gitmodules for moved submodules submodule.c: add .gitmodules staging helper functions mv: move submodules using a gitfile mv: move submodules together with their work trees rm: do not set a variable twice without intermediate reading. t6131 - skip tests if on case-insensitive file system parse_pathspec: accept :(icase)path syntax pathspec: support :(glob) syntax pathspec: make --literal-pathspecs disable pathspec magic pathspec: support :(literal) syntax for noglob pathspec kill limit_pathspec_to_literal() as it's only used by parse_pathspec() parse_pathspec: preserve prefix length via PATHSPEC_PREFIX_ORIGIN parse_pathspec: make sure the prefix part is wildcard-free rename field "raw" to "_raw" in struct pathspec tree-diff: remove the use of pathspec's raw[] in follow-rename codepath remove match_pathspec() in favor of match_pathspec_depth() remove init_pathspec() in favor of parse_pathspec() remove diff_tree_{setup,release}_paths convert common_prefix() to use struct pathspec ...
2013-08-05Replace deprecated OPT_BOOLEAN by OPT_BOOLStefan Beller
This task emerged from b04ba2bb (parse-options: deprecate OPT_BOOLEAN, 2011-09-27). All occurrences of the respective variables have been reviewed and none of them relied on the counting up mechanism, but all of them were using the variable as a true boolean. This patch does not change semantics of any command intentionally. Signed-off-by: Stefan Beller <stefanbeller@googlemail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-22Merge branch 'jx/clean-interactive'Junio C Hamano
Add "interactive" mode to "git clean". The early part to refactor relative path related helper functions looked sensible. * jx/clean-interactive: test: run testcases with POSIX absolute paths on Windows test: add t7301 for git-clean--interactive git-clean: add documentation for interactive git-clean git-clean: add ask each interactive action git-clean: add select by numbers interactive action git-clean: add filter by pattern interactive action git-clean: use a git-add-interactive compatible UI git-clean: add colors to interactive git-clean git-clean: show items of del_list in columns git-clean: add support for -i/--interactive git-clean: refactor git-clean into two phases write_name{_quoted_relative,}(): remove redundant parameters quote_path_relative(): remove redundant parameter quote.c: substitute path_relative with relative_path path.c: refactor relative_path(), not only strip prefix test: add test cases for relative_path
2013-07-15convert {read,fill}_directory to take struct pathspecNguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-15parse_pathspec: add special flag for max_depth featureNguyễn Thái Ngọc Duy
match_pathspec_depth() and tree_entry_interesting() check max_depth field in order to support "git grep --max-depth". The feature activation is tied to "recursive" field, which led to some unwanted activation, e.g. 5c8eeb8 (diff-index: enable recursive pathspec matching in unpack_trees - 2012-01-15). This patch decouples the activation from "recursive" field, puts it in "magic" field instead. This makes sure that only "git grep" can activate this feature. And because parse_pathspec knows when the feature is not used, it does not need to sort pathspec (required for max_depth to work correctly). A small win for non-grep cases. Even though a new magic flag is introduced, no magic syntax is. The magic can be only enabled by parse_pathspec() caller. We might someday want to support ":(maxdepth:10)src." It all depends on actual use cases. max_depth feature cannot be enabled via init_pathspec() anymore. But that's ok because init_pathspec() is on its way to /dev/null. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-15convert some get_pathspec() calls to parse_pathspec()Nguyễn Thái Ngọc Duy
These call sites follow the pattern: paths = get_pathspec(prefix, argv); init_pathspec(&pathspec, paths); which can be converted into a single parse_pathspec() call. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-15move struct pathspec and related functions to pathspec.[ch]Nguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-09Convert "struct cache_entry *" to "const ..." wherever possibleNguyễn Thái Ngọc Duy
I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26quote_path_relative(): remove redundant parameterJiang Xin
quote_path_relative() used to take a counted string as its parameter (the string to be quoted). With an earlier change, it now uses relative_path() that does not take a counted string, and we have been passing only the pointer to the string since then. Remove the length parameter from quote_path_relative() to show that this parameter was redundant. All the changed lines show that the caller passed either -1 (to ask the function run strlen() on the string), or the length of the string, so the earlier conversion was safe. All the callers of quote_path_relative() that used to take counted string have been audited to make sure that they are passing length of the actual string (or -1 to ask the callee run strlen()) Signed-off-by: Jiang Xin <worldhello.net@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-05-10grep: honor --textconv for the case rev:pathMichael J Gruber
Make "grep" honor the "--textconv" option also for the object case, i.e. when used with an argument "rev:path". Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-05-10grep: allow to use textconv filtersJeff King
Recently and not so recently, we made sure that log/grep type operations use textconv filters when a userfacing diff would do the same: ef90ab6 (pickaxe: use textconv for -S counting, 2012-10-28) b1c2f57 (diff_grep: use textconv buffers for add/deleted files, 2012-10-28) 0508fe5 (combine-diff: respect textconv attributes, 2011-05-23) "git grep" currently does not use textconv filters at all, that is neither for displaying the match and context nor for the actual grepping, even when requested by --textconv. Introduce an option "--textconv" which makes git grep use any configured textconv filters for grepping and output purposes. It is off by default. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-25Merge branch 'jk/fully-peeled-packed-ref'Junio C Hamano
Not that we do not actively encourage having annotated tags outside refs/tags/ hierarchy, but they were not advertised correctly to the ls-remote and fetch with recent version of Git. * jk/fully-peeled-packed-ref: pack-refs: add fully-peeled trait pack-refs: write peeled entry for non-tags use parse_object_or_die instead of die("bad object") avoid segfaults on parse_object failure
2013-03-17use parse_object_or_die instead of die("bad object")Jeff King
Some call-sites do: o = parse_object(sha1); if (!o) die("bad object %s", some_name); We can now handle that as a one-liner, and get more consistent output. In the third case of this patch, it looks like we are losing information, as the existing message also outputs the sha1 hex; however, parse_object will already have written a more specific complaint about the sha1, so there is no point in repeating it here. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-22grep: avoid accepting ambiguous revisionNguyễn Thái Ngọc Duy
Unlike other commands that take both revs and pathspecs without "--" disamiguators only when the boundary is clear, "git grep" treated what can be interpreted as a rev as-is, without making sure that it could also have meant a pathspec. E.g. $ git grep -e foo master when 'master' is in the working tree, should have triggered an ambiguity error, but it didn't, and searched in the tree of the commit named by 'master'. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-29Merge branch 'nd/grep-true-path'Jeff King
"git grep -e pattern <tree>" asked the attribute system to read "<tree>:.gitattributes" file in the working tree, which was nonsense. * nd/grep-true-path: grep: stop looking at random places for .gitattributes
2012-10-12grep: stop looking at random places for .gitattributesNguyễn Thái Ngọc Duy
grep searches for .gitattributes using "name" field in struct grep_source but that field is not real on-disk path name. For example, "grep pattern rev" fills the field with "rev:path", and Git looks for .gitattributes in the (non-existent but exploitable) path "rev:path" instead of "path". This patch passes real paths down to grep_source_load_driver() when: - grep on work tree - grep on the index - grep a commit (or a tag if it points to a commit) so that these cases look up .gitattributes at proper paths. .gitattributes lookup is disabled in all other cases. Initial-work-by: Jeff King <peff@peff.net> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-10grep: move pattern-type bits support to top-level grep.[ch]Junio C Hamano
Switching between -E/-G/-P/-F correctly needs a lot more than just flipping opt->regflags bit these days, and we have a nice helper function buried in builtin/grep.c for the sole use of "git grep". Extract it so that "log --grep" family can also use it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-09grep: move the configuration parsing logic to grep.[ch]Junio C Hamano
The configuration handling is a library-ish part of this program, that is not specific to "git grep" command. It should be reusable by "log" and others. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-09builtin/grep.c: make configuration callback more reusableJunio C Hamano
The grep_config() function takes one instance of grep_opt as its callback parameter, and populates it by running git_config(). This has three practical implications: - You have to have an instance of grep_opt already when you call the configuration, but that is not necessarily always true. You may be trying to initialize the grep_filter member of rev_info, but are not ready to call init_revisions() on it yet. - It is not easy to enhance grep_config() in such a way to make it cascade to other callback functions to grab other variables in one call of git_config(); grep_config() can be cascaded into from other callbacks, but it has to be at the leaf level of a cascade. - If you ever need to use more than one instance of grep_opt, you will have to open and read the configuration file(s) every time you initialize them. Rearrange the configuration mechanism and model it after how diff configuration variables are handled. An early call to git_config() reads and remembers the values taken from the configuration in the default "template", and a separate call to grep_init() uses this template to instantiate a grep_opt. The next step will be to move some of this out of this file so that the other user of the grep machinery (i.e. "log") can use it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-30Merge branch 'jc/maint-log-grep-all-match-1' into maintJunio C Hamano
* jc/maint-log-grep-all-match-1: grep.c: make two symbols really file-scope static this time t7810-grep: test --all-match with multiple --grep and --author options t7810-grep: test interaction of multiple --grep and --author options t7810-grep: test multiple --author with --all-match t7810-grep: test multiple --grep with and without --all-match t7810-grep: bring log --grep tests in common form grep.c: mark private file-scope symbols as static log: document use of multiple commit limiting options log --grep/--author: honor --all-match honored for multiple --grep patterns grep: show --debug output only once grep: teach --debug option to dump the parse tree
2012-09-18Merge branch 'jc/maint-log-grep-all-match'Junio C Hamano
Fix a long-standing bug in "git log --grep" when multiple "--grep" are used together with "--all-match" and "--author" or "--committer". * jc/maint-log-grep-all-match: t7810-grep: test --all-match with multiple --grep and --author options t7810-grep: test interaction of multiple --grep and --author options t7810-grep: test multiple --author with --all-match t7810-grep: test multiple --grep with and without --all-match t7810-grep: bring log --grep tests in common form grep.c: mark private file-scope symbols as static log: document use of multiple commit limiting options log --grep/--author: honor --all-match honored for multiple --grep patterns grep: show --debug output only once grep: teach --debug option to dump the parse tree
2012-09-14grep: show --debug output only onceMichael J Gruber
When threaded grep is in effect, the patterns are duplicated and recompiled for each thread. Avoid "--debug" output during the recompilation so that the output is given once instead of "1+nthreads" times. Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-14grep: teach --debug option to dump the parse treeJunio C Hamano
Our "grep" allows complex boolean expressions to be formed to match each individual line with operators like --and, '(', ')' and --not. Introduce the "--debug" option to show the parse tree to help people who want to debug and enhance it. Also "log" learns "--grep-debug" option to do the same. The command line parser to the log family is a lot more limited than the general "git grep" parser, but it has special handling for header matching (e.g. "--author"), and a parse tree is valuable when working on it. Note that "--all-match" is *not* any individual node in the parse tree. It is an instruction to the evaluator to check all the nodes in the top-level backbone have matched and reject a document as non-matching otherwise. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-07Merge branch 'nd/i18n-parseopt-help'Junio C Hamano
A lot of i18n mark-up for the help text from "git <cmd> -h". * nd/i18n-parseopt-help: (66 commits) Use imperative form in help usage to describe an action Reduce translations by using same terminologies i18n: write-tree: mark parseopt strings for translation i18n: verify-tag: mark parseopt strings for translation i18n: verify-pack: mark parseopt strings for translation i18n: update-server-info: mark parseopt strings for translation i18n: update-ref: mark parseopt strings for translation i18n: update-index: mark parseopt strings for translation i18n: tag: mark parseopt strings for translation i18n: symbolic-ref: mark parseopt strings for translation i18n: show-ref: mark parseopt strings for translation i18n: show-branch: mark parseopt strings for translation i18n: shortlog: mark parseopt strings for translation i18n: rm: mark parseopt strings for translation i18n: revert, cherry-pick: mark parseopt strings for translation i18n: rev-parse: mark parseopt strings for translation i18n: reset: mark parseopt strings for translation i18n: rerere: mark parseopt strings for translation i18n: status: mark parseopt strings for translation i18n: replace: mark parseopt strings for translation ...
2012-08-22Use imperative form in help usage to describe an actionNguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-20i18n: grep: mark parseopt strings for translationNguyễn Thái Ngọc Duy
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-03grep: add a grep.patternType configuration settingJ Smith
The grep.extendedRegexp configuration setting enables the -E flag on grep by default but there are no equivalents for the -G, -F and -P flags. Rather than adding an additional setting for grep.fooRegexp for current and future pattern matching options, add a grep.patternType setting that can accept appropriate values for modifying the default grep pattern matching behavior. The current values are "basic", "extended", "fixed", "perl" and "default" for setting -G, -E, -F, -P and the default behavior respectively. When grep.patternType is set to a value other than "default", the grep.extendedRegexp setting is ignored. The value of "default" restores the current default behavior, including the grep.extendedRegexp behavior. Signed-off-by: J Smith <dark.panda@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-07-11Merge branch 'mm/verify-filename-fix' into maintJunio C Hamano
"git diff COPYING HEAD:COPYING" gave a nonsense error message that claimed that the treeish HEAD did not have COPYING in it. * mm/verify-filename-fix: verify_filename(): ask the caller to chose the kind of diagnosis sha1_name: do not trigger detailed diagnosis for file arguments
2012-06-28Merge branch 'mm/verify-filename-fix'Junio C Hamano
"git diff COPYING HEAD:COPYING" gave a nonsense error message that claimed that the treeish HEAD did not have COPYING in it.
2012-06-18verify_filename(): ask the caller to chose the kind of diagnosisMatthieu Moy
verify_filename() can be called in two different contexts. Either we just tried to interpret a string as an object name, and it fails, so we try looking for a working tree file (i.e. we finished looking at revs that come earlier on the command line, and the next argument must be a pathname), or we _know_ that we are looking for a pathname, and shouldn't even try interpreting the string as an object name. For example, with this change, we get: $ git log COPYING HEAD:inexistant fatal: HEAD:inexistant: no such path in the working tree. Use '-- <path>...' to specify paths that do not exist locally. $ git log HEAD:inexistant fatal: Path 'inexistant' does not exist in 'HEAD' Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-06-01Merge branch 'rs/maint-grep-F' into maintJunio C Hamano
"git grep -e '$pattern'", unlike the case where the patterns are read from a file, did not treat individual lines in the given pattern argument as separate regular expressions as it should. By René Scharfe * rs/maint-grep-F: grep: stop leaking line strings with -f grep: support newline separated pattern list grep: factor out do_append_grep_pat() grep: factor out create_grep_pat()
2012-05-25Merge branch 'rs/maint-grep-F'Junio C Hamano
"git grep -e '$pattern'", unlike the case where the patterns are read from a file, did not treat individual lines in the given pattern argument as separate regular expressions as it should.
2012-05-21grep: stop leaking line strings with -fRené Scharfe
When reading patterns from a file, we pass the lines as allocated string buffers to append_grep_pat() and never free them. That's not a problem because they are needed until the program ends anyway. However, now that the function duplicates the pattern string, we can reuse the strbuf after calling that function. This simplifies the code a bit and plugs a minor memory leak. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-02Merge branch 'rs/no-no-no-parseopt'Junio C Hamano
* rs/no-no-no-parseopt: parse-options: remove PARSE_OPT_NEGHELP parse-options: allow positivation of options starting, with no- test-parse-options: convert to OPT_BOOL() Conflicts: builtin/grep.c
2012-02-28parse-options: remove PARSE_OPT_NEGHELPRené Scharfe
PARSE_OPT_NEGHELP is confusing because short options defined with that flag do the opposite of what the helptext says. It is also not needed anymore now that options starting with no- can be negated by removing that prefix. Convert its only two users to OPT_NEGBIT() and OPT_BOOL() and then remove support for PARSE_OPT_NEGHELP. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-14Merge branch 'jk/grep-binary-attribute'Junio C Hamano
* jk/grep-binary-attribute: grep: pre-load userdiff drivers when threaded grep: load file data after checking binary-ness grep: respect diff attributes for binary-ness grep: cache userdiff_driver in grep_source grep: drop grep_buffer's "name" parameter convert git-grep to use grep_source interface grep: refactor the concept of "grep source" into an object grep: move sha1-reading mutex into low-level code grep: make locking flag global
2012-02-07drop odd return value semantics from userdiff_configJeff King
When the userdiff_config function was introduced in be58e70 (diff: unify external diff and funcname parsing code, 2008-10-05), it used a return value convention unlike any other config callback. Like other callbacks, it used "-1" to signal error. But it returned "1" to indicate that it found something, and "0" otherwise; other callbacks simply returned "0" to indicate that no error occurred. This distinction was necessary at the time, because the userdiff namespace overlapped slightly with the color configuration namespace. So "diff.color.foo" could mean "the 'foo' slot of diff coloring" or "the 'foo' component of the "color" userdiff driver". Because the color-parsing code would die on an unknown color slot, we needed the userdiff code to indicate that it had matched the variable, letting us bypass the color-parsing code entirely. Later, in 8b8e862 (ignore unknown color configuration, 2009-12-12), the color-parsing code learned to silently ignore unknown slots. This means we no longer need to protect userdiff-matched variables from reaching the color-parsing code. We can therefore change the userdiff_config calling convention to a more normal one. This drops some code from each caller, which is nice. But more importantly, it reduces the cognitive load for readers who may wonder why userdiff_config is unlike every other config callback. There's no need to add a new test confirming that this works; t4020 already contains a test that sets diff.color.external. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-02grep: pre-load userdiff drivers when threadedJeff King
The low-level grep_source code will automatically load the userdiff driver to see whether a file is binary. However, when we are threaded, it will load the drivers in a non-deterministic order, handling each one as its assigned thread happens to be scheduled. Meanwhile, the attribute lookup code (which underlies the userdiff driver lookup) is optimized to handle paths in sequential order (because they tend to share the same gitattributes files). Multi-threading the lookups destroys the locality and makes this optimization less effective. We can fix this by pre-loading the userdiff driver in the main thread, before we hand off the file to a worker thread. My best-of-five for "git grep foo" on the linux-2.6 repository went from: real 0m0.391s user 0m1.708s sys 0m0.584s to: real 0m0.360s user 0m1.576s sys 0m0.572s Not a huge speedup, but it's quite easy to do. The only trick is that we shouldn't perform this optimization if "-a" was used, in which case we won't bother checking whether the files are binary at all. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-02convert git-grep to use grep_source interfaceJeff King
The grep_source interface (as opposed to grep_buffer) will eventually gives us a richer interface for telling the low-level grep code about our buffers. Eventually this will lead to things like better binary-file handling. For now, it lets us drop a lot of now-redundant code. The conversion is mostly straight-forward. One thing to note is that the memory ownership rules for "struct grep_source" are different than the "struct work_item" found here (the former will copy things like the filename, rather than taking ownership). Therefore you will also see some slight tweaking of when filename buffers are released. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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 <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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 <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-01-23grep: fix -l/-L interaction with decoration linesAlbert Yale
In threaded mode, git-grep emits file breaks (enabled with context, -W and --break) into the accumulation buffers even if they are not required. The output collection thread then uses skip_first_line to skip the first such line in the output, which would otherwise be at the very top. This is wrong when the user also specified -l/-L/-c, in which case every line is relevant. While arguably giving these options together doesn't make any sense, git-grep has always quietly accepted it. So do not skip anything in these cases. Signed-off-by: Albert Yale <surfingalbert@gmail.com> Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-16grep: disable threading in non-worktree caseThomas Rast
Measurements by various people have shown that grepping in parallel is not beneficial when the object store is involved. For example, with a simple regex: Threads | --cached case | worktree case ---------------------------------------------------------------- 8 (default) | 2.88u 0.21s 0:02.94real | 0.19u 0.32s 0:00.16real 4 | 2.89u 0.29s 0:02.99real | 0.16u 0.34s 0:00.17real 2 | 2.83u 0.36s 0:02.87real | 0.18u 0.32s 0:00.26real NO_PTHREADS | 2.16u 0.08s 0:02.25real | 0.12u 0.17s 0:00.31real This happens because all the threads contend on read_sha1_mutex almost all of the time. A more complex regex allows the threads to do more work in parallel, but as Jeff King found out, the "super boost" (much higher clock when only one core is active) feature of recent CPUs still causes the unthreaded case to win by a large margin. So until the pack machinery allows unthreaded access, we disable grep's threading in all but the worktree case. Helped-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Helped-by: Jeff King <peff@peff.net> Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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 <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-05Merge branch 'nd/misc-cleanups'Junio C Hamano
* nd/misc-cleanups: unpack_object_header_buffer(): clear the size field upon error tree_entry_interesting: make use of local pointer "item" tree_entry_interesting(): give meaningful names to return values read_directory_recursive: reduce one indentation level get_tree_entry(): do not call find_tree_entry() on an empty tree tree-walk.c: do not leak internal structure in tree_entry_len()
2011-10-27tree_entry_interesting(): give meaningful names to return valuesNguyễn Thái Ngọc Duy
It is a basic code hygiene to avoid magic constants that are unnamed. Besides, this helps extending the value later on for "interesting, but cannot decide if the entry truely matches yet" (ie. prefix matches) Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-27tree-walk.c: do not leak internal structure in tree_entry_len()Nguyễn Thái Ngọc Duy
tree_entry_len() does not simply take two random arguments and return a tree length. The two pointers must point to a tree item structure, or struct name_entry. Passing random pointers will return incorrect value. Force callers to pass struct name_entry instead of two pointers (with hope that they don't manually construct struct name_entry themselves) Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-26builtin/grep: simplify lock_and_read_sha1_file()Junio C Hamano
As read_sha1_lock/unlock have been made aware of use_threads, this caller can be made a lot simpler. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-26builtin/grep: make lock/unlock into static inline functionsJunio C Hamano
Signed-off-by: Junio C Hamano <gitster@pobox.com>