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2017-06-15config: don't include config.h by defaultBrandon Williams
Stop including config.h by default in cache.h. Instead only include config.h in those files which require use of the config system. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-27describe: localize debug output fullyMichael J Gruber
git describe --debug localizes all debug messages but not the terms head, lightweight, annotated that it outputs for the candidates. Localize them, too. Signed-off-by: Michael J Gruber <git@grubix.eu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-22builtin/describe: introduce --broken flagStefan Beller
git-describe tells you the version number you're at, or errors out, e.g. when you run it outside of a repository, which may happen when downloading a tar ball instead of using git to obtain the source code. To keep this property of only erroring out, when not in a repository, severe (submodule) errors must be downgraded to reporting them gently instead of having git-describe error out completely. To achieve that a flag '--broken' is introduced, which is in the same vein as '--dirty' but uses an actual child process to check for dirtiness. When that child dies unexpectedly, we'll append '-broken' instead of '-dirty'. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-17Merge branch 'bc/object-id'Junio C Hamano
"uchar [40]" to "struct object_id" conversion continues. * bc/object-id: wt-status: convert to struct object_id builtin/merge-base: convert to struct object_id Convert object iteration callbacks to struct object_id sha1_file: introduce an nth_packed_object_oid function refs: simplify parsing of reflog entries refs: convert each_reflog_ent_fn to struct object_id reflog-walk: convert struct reflog_info to struct object_id builtin/replace: convert to struct object_id Convert remaining callers of resolve_refdup to object_id builtin/merge: convert to struct object_id builtin/clone: convert to struct object_id builtin/branch: convert to struct object_id builtin/grep: convert to struct object_id builtin/fmt-merge-message: convert to struct object_id builtin/fast-export: convert to struct object_id builtin/describe: convert to struct object_id builtin/diff-tree: convert to struct object_id builtin/commit: convert to struct object_id hex: introduce parse_oid_hex
2017-02-22builtin/describe: convert to struct object_idbrian m. carlson
Convert the functions in this file and struct commit_name to struct object_id. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-01-24describe: teach describe negative pattern matchesJacob Keller
Teach git-describe the `--exclude` option which will allow specifying a glob pattern of tags to ignore. This can be combined with the `--match` patterns to enable more flexibility in determining which tags to consider. For example, suppose you wish to find the first official release tag that contains a certain commit. If we assume that official release tags are of the form "v*" and pre-release candidates include "*rc*" in their name, we can now find the first release tag that introduces the commit abcdef: git describe --contains --match="v*" --exclude="*rc*" abcdef Add documentation, tests, and completion for this change. Signed-off-by: Jacob Keller <jacob.keller@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-01-24describe: teach --match to accept multiple patternsJacob Keller
Teach `--match` to be accepted multiple times, accumulating a list of patterns to match into a string list. Each pattern is inclusive, such that a tag need only match one of the provided patterns to be considered for matching. This extension is useful as it enables more flexibility in what tags match, and may avoid the need to run the describe command multiple times to get the same result. Add tests and update the documentation for this change. Signed-off-by: Jacob Keller <jacob.keller@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-09-29use QSORTRené Scharfe
Apply the semantic patch contrib/coccinelle/qsort.cocci to the code base, replacing calls of qsort(3) with QSORT. The resulting code is shorter and supports empty arrays with NULL pointers. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-11-20Remove get_object_hash.brian m. carlson
Convert all instances of get_object_hash to use an appropriate reference to the hash member of the oid member of struct object. This provides no functional change, as it is essentially a macro substitution. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-11-20Convert struct object to object_idbrian m. carlson
struct object is one of the major data structures dealing with object IDs. Convert it to use struct object_id instead of an unsigned char array. Convert get_object_hash to refer to the new member as well. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-11-20Add several uses of get_object_hash.brian m. carlson
Convert most instances where the sha1 member of struct object is dereferenced to use get_object_hash. Most instances that are passed to functions that have versions taking struct object_id, such as get_sha1_hex/get_oid_hex, or instances that can be trivially converted to use struct object_id instead, are not converted. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-08-31Merge branch 'sg/describe-contains'Junio C Hamano
"git describe" without argument defaulted to describe the HEAD commit, but "git describe --contains" didn't. Arguably, in a repository used for active development, such defaulting would not be very useful as the tip of branch is typically not tagged, but it is better to be consistent. * sg/describe-contains: describe --contains: default to HEAD when no commit-ish is given
2015-08-25describe --contains: default to HEAD when no commit-ish is givenSZEDER Gábor
'git describe --contains' doesn't default to HEAD when no commit is given, and it doesn't produce any output, not even an error: ~/src/git ((v2.5.0))$ ./git describe --contains ~/src/git ((v2.5.0))$ ./git describe --contains HEAD v2.5.0^0 Unlike other 'git describe' options, the '--contains' code path is implemented by calling 'name-rev' with a bunch of options plus all the commit-ishes that were passed to 'git describe'. If no commit-ish was present, then 'name-rev' got invoked with none, which then leads to the behavior illustrated above. Porcelain commands usually default to HEAD when no commit-ish is given, and 'git describe' already does so in all other cases, so it should do so with '--contains' as well. Pass HEAD to 'name-rev' when no commit-ish is given on the command line to make '--contains' behave consistently with other 'git describe' options. While at it, use argv_array_pushv() instead of the loop to pass commit-ishes to 'git name-rev'. 'git describe's short help already indicates that the commit-ish is optional, but the synopsis in the man page doesn't, so update it accordingly as well. Signed-off-by: SZEDER Gábor <szeder@ira.uka.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-25get_name(): rewrite to take an object_id argumentMichael Haggerty
Rewrite to take an object_id argument and convert the local variable "peeled" object_id. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-25each_ref_fn: change to take an object_id parameterMichael Haggerty
Change typedef each_ref_fn to take a "const struct object_id *oid" parameter instead of "const unsigned char *sha1". To aid this transition, implement an adapter that can be used to wrap old-style functions matching the old typedef, which is now called "each_ref_sha1_fn"), and make such functions callable via the new interface. This requires the old function and its cb_data to be wrapped in a "struct each_ref_fn_sha1_adapter", and that object to be used as the cb_data for an adapter function, each_ref_fn_adapter(). This is an enormous diff, but most of it consists of simple, mechanical changes to the sites that call any of the "for_each_ref" family of functions. Subsequent to this change, the call sites can be rewritten one by one to use the new interface. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-14standardize usage info string formatAlex Henrie
This patch puts the usage info strings that were not already in docopt- like format into docopt-like format, which will be a litle easier for end users and a lot easier for translators. Changes include: - Placing angle brackets around fill-in-the-blank parameters - Putting dashes in multiword parameter names - Adding spaces to [-f|--foobar] to make [-f | --foobar] - Replacing <foobar>* with [<foobar>...] Signed-off-by: Alex Henrie <alexhenrie24@gmail.com> Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-01lockfile.h: extract new header file for the functions in lockfile.cMichael Haggerty
Move the interface declaration for the functions in lockfile.c from cache.h to a new file, lockfile.h. Add #includes where necessary (and remove some redundant includes of cache.h by files that already include builtin.h). Move the documentation of the lock_file state diagram from lockfile.c to the new header file. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-07hashmap: add simplified hashmap_get_from_hash() APIKarsten Blees
Hashmap entries are typically looked up by just a key. The hashmap_get() API expects an initialized entry structure instead, to support compound keys. This flexibility is currently only needed by find_dir_entry() in name-hash.c (and compat/win32/fscache.c in the msysgit fork). All other (currently five) call sites of hashmap_get() have to set up a near emtpy entry structure, resulting in duplicate code like this: struct hashmap_entry keyentry; hashmap_entry_init(&keyentry, hash(key)); return hashmap_get(map, &keyentry, key); Add a hashmap_get_from_hash() API that allows hashmap lookups by just specifying the key and its hash code, i.e.: return hashmap_get_from_hash(map, hash(key), key); Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-07hashmap: factor out getting a hash code from a SHA1Karsten Blees
Copying the first bytes of a SHA1 is duplicated in six places, however, the implications (the actual value would depend on the endianness of the platform) is documented only once. Add a properly documented API for this. Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-14Merge branch 'nd/no-more-fnmatch'Junio C Hamano
We started using wildmatch() in place of fnmatch(3); complete the process and stop using fnmatch(3). * nd/no-more-fnmatch: actually remove compat fnmatch source code stop using fnmatch (either native or compat) Revert "test-wildmatch: add "perf" command to compare wildmatch and fnmatch" use wildmatch() directly without fnmatch() wrapper
2014-02-27Merge branch 'kb/fast-hashmap'Junio C Hamano
Improvements to our hash table to get it to meet the needs of the msysgit fscache project, with some nice performance improvements. * kb/fast-hashmap: name-hash: retire unused index_name_exists() hashmap.h: use 'unsigned int' for hash-codes everywhere test-hashmap.c: drop unnecessary #includes .gitignore: test-hashmap is a generated file read-cache.c: fix memory leaks caused by removed cache entries builtin/update-index.c: cleanup update_one fix 'git update-index --verbose --again' output remove old hash.[ch] implementation name-hash.c: remove cache entries instead of marking them CE_UNHASHED name-hash.c: use new hash map implementation for cache entries name-hash.c: remove unreferenced directory entries name-hash.c: use new hash map implementation for directories diffcore-rename.c: use new hash map implementation diffcore-rename.c: simplify finding exact renames diffcore-rename.c: move code around to prepare for the next patch buitin/describe.c: use new hash map implementation add a hashtable implementation that supports O(1) removal submodule: don't access the .gitmodules cache entry after removing it
2014-02-20use wildmatch() directly without fnmatch() wrapperNguyễn Thái Ngọc Duy
Make it clear that we don't use fnmatch() anymore. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-12-05replace {pre,suf}fixcmp() with {starts,ends}_with()Christian Couder
Leaving only the function definitions and declarations so that any new topic in flight can still make use of the old functions, replace existing uses of the prefixcmp() and suffixcmp() with new API functions. The change can be recreated by mechanically applying this: $ git grep -l -e prefixcmp -e suffixcmp -- \*.c | grep -v strbuf\\.c | xargs perl -pi -e ' s|!prefixcmp\(|starts_with\(|g; s|prefixcmp\(|!starts_with\(|g; s|!suffixcmp\(|ends_with\(|g; s|suffixcmp\(|!ends_with\(|g; ' on the result of preparatory changes in this series. Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-18buitin/describe.c: use new hash map implementationKarsten Blees
Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-10-31describe: trivial style fixesFelipe Contreras
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-09-17Merge branch 'rh/ishes-doc'Junio C Hamano
We liberally use "committish" and "commit-ish" (and "treeish" and "tree-ish"); as these are non-words, let's unify these terms to their dashed form. More importantly, clarify the documentation on object peeling using these terms. * rh/ishes-doc: glossary: fix and clarify the definition of 'ref' revisions.txt: fix and clarify <rev>^{<type>} glossary: more precise definition of tree-ish (a.k.a. treeish) use 'commit-ish' instead of 'committish' use 'tree-ish' instead of 'treeish' glossary: define commit-ish (a.k.a. committish) glossary: mention 'treeish' as an alternative to 'tree-ish'
2013-09-04use 'commit-ish' instead of 'committish'Richard Hansen
Replace 'committish' in documentation and comments with 'commit-ish' to match gitglossary(7) and to be consistent with 'tree-ish'. The only remaining instances of 'committish' are: * variable, function, and macro names * "(also committish)" in the definition of commit-ish in gitglossary[7] Signed-off-by: Richard Hansen <rhansen@bbn.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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>
2013-07-18describe: fix --contains when a tag is given as inputJunio C Hamano
"git describe" takes a commit and gives it a name based on tags in its neighbourhood. The command does take a commit-ish but when given a tag that points at a commit, it should dereference the tag before computing the name for the commit. As the whole processing is internally delegated to name-rev, if we unwrap tags down to the underlying commit when invoking name-rev, it will make the name-rev issue an error message based on the unwrapped object name (i.e. either 40-hex object name, or "$tag^0") that is different from what the end-user gave to the command when the commit cannot be described. Introduce an internal option --peel-tag to the name-rev to tell it to unwrap a tag in its input from the command line. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-09describe: use argv-arrayJunio C Hamano
Instead of using a hand allocated args[] array, use argv-array API to manage the dynamically created list of arguments when invoking name-rev. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-14Merge branch 'mh/reflife'Junio C Hamano
Define memory ownership and lifetime rules for what for-each-ref feeds to its callbacks (in short, "you do not own it, so make a copy if you want to keep it"). * mh/reflife: (25 commits) refs: document the lifetime of the args passed to each_ref_fn register_ref(): make a copy of the bad reference SHA-1 exclude_existing(): set existing_refs.strdup_strings string_list_add_refs_by_glob(): add a comment about memory management string_list_add_one_ref(): rename first parameter to "refname" show_head_ref(): rename first parameter to "refname" show_head_ref(): do not shadow name of argument add_existing(): do not retain a reference to sha1 do_fetch(): clean up existing_refs before exiting do_fetch(): reduce scope of peer_item object_array_entry: fix memory handling of the name field find_first_merges(): remove unnecessary code find_first_merges(): initialize merges variable using initializer fsck: don't put a void*-shaped peg in a char*-shaped hole object_array_remove_duplicates(): rewrite to reduce copying revision: use object_array_filter() in implementation of gc_boundary() object_array: add function object_array_filter() revision: split some overly-long lines cmd_diff(): make it obvious which cases are exclusive of each other cmd_diff(): rename local variable "list" -> "entry" ...
2013-05-28describe: make own copy of refnameMichael Haggerty
Do not retain a reference to the refname passed to the each_ref_fn callback get_name(), because there is no guarantee of the lifetimes of these names. Instead, make a local copy when needed. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-05-20describe: Add --first-parent optionMike Crowe
Only consider the first parent commit when walking the commit history. This is useful if you only wish to match tags on your branch after a merge. Signed-off-by: Mike Crowe <mac@mcrowe.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-25Merge branch 'jc/describe'Junio C Hamano
The "--match=<pattern>" option of "git describe", when used with "--all" to allow refs that are not annotated tags to be used as a base of description, did not restrict the output from the command to those that match the given pattern. We may want to have a looser matching that does not restrict to tags, but that can be done as a follow-up topic; this step is purely a bugfix. * jc/describe: describe: --match=<pattern> must limit the refs even when used with --all
2013-02-28describe: --match=<pattern> must limit the refs even when used with --allJunio C Hamano
The logic to limit the refs used for describing with a matching pattern with --match=<pattern> parameter was implemented incorrectly when --all is in effect. It just demoted a ref that did not match the pattern to lower priority---if there aren't other refs with higher priority that describe the given commit, such an unmatching ref was still used. When --match is used, reject refs that do not match the given criteria, so that with or without --all, the output will only use refs that match the pattern. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-25Fix ".git/refs" stragglersGreg Price
A couple of references still survive to .git/refs as a tree of all refs. Fix one in docs, one in a -h message, one in a -h message quoted in docs. Signed-off-by: Greg Price <price@mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-25Merge branch 'jk/peel-ref'Jeff King
Speeds up "git upload-pack" (what is invoked by "git fetch" on the other side of the connection) by reducing the cost to advertise the branches and tags that are available in the repository. * jk/peel-ref: upload-pack: use peel_ref for ref advertisements peel_ref: check object type before loading peel_ref: do not return a null sha1 peel_ref: use faster deref_tag_noverify
2012-10-05peel_ref: do not return a null sha1Jeff King
The idea of the peel_ref function is to dereference tag objects recursively until we hit a non-tag, and return the sha1. Conceptually, it should return 0 if it is successful (and fill in the sha1), or -1 if there was nothing to peel. However, the current behavior is much more confusing. For a regular loose ref, the behavior is as described above. But there is an optimization to reuse the peeled-ref value for a ref that came from a packed-refs file. If we have such a ref, we return its peeled value, even if that peeled value is null (indicating that we know the ref definitely does _not_ peel). It might seem like such information is useful to the caller, who would then know not to bother loading and trying to peel the object. Except that they should not bother loading and trying to peel the object _anyway_, because that fallback is already handled by peel_ref. In other words, the whole point of calling this function is that it handles those details internally, and you either get a sha1, or you know that it is not peel-able. This patch catches the null sha1 case internally and converts it into a -1 return value (i.e., there is nothing to peel). This simplifies callers, which do not need to bother checking themselves. Two callers are worth noting: - in pack-objects, a comment indicates that there is a difference between non-peelable tags and unannotated tags. But that is not the case (before or after this patch). Whether you get a null sha1 has to do with internal details of how peel_ref operated. - in show-ref, if peel_ref returns a failure, the caller tries to decide whether to try peeling manually based on whether the REF_ISPACKED flag is set. But this doesn't make any sense. If the flag is set, that does not necessarily mean the ref came from a packed-refs file with the "peeled" extension. But it doesn't matter, because even if it didn't, there's no point in trying to peel it ourselves, as peel_ref would already have done so. In other words, the fallback peeling is guaranteed to fail. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-20i18n: describe: 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>
2011-08-11describe: Refresh the index when run with --dirtyAllan Caffee
When running git describe --dirty the index should be refreshed. Previously the cached index would cause describe to think that the index was dirty when, in reality, it was just stale. The issue was exposed by python setuptools which hardlinks files into another directory when building a distribution. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-02Merge branch 'ab/i18n-st'Junio C Hamano
* ab/i18n-st: (69 commits) i18n: git-shortlog basic messages i18n: git-revert split up "could not revert/apply" message i18n: git-revert literal "me" messages i18n: git-revert "Your local changes" message i18n: git-revert basic messages i18n: git-notes GIT_NOTES_REWRITE_MODE error message i18n: git-notes basic commands i18n: git-gc "Auto packing the repository" message i18n: git-gc basic messages i18n: git-describe basic messages i18n: git-clean clean.requireForce messages i18n: git-clean basic messages i18n: git-bundle basic messages i18n: git-archive basic messages i18n: git-status "renamed: " message i18n: git-status "Initial commit" message i18n: git-status "Changes to be committed" message i18n: git-status shortstatus messages i18n: git-status "nothing to commit" messages i18n: git-status basic messages ... Conflicts: builtin/branch.c builtin/checkout.c builtin/clone.c builtin/commit.c builtin/grep.c builtin/merge.c builtin/push.c builtin/revert.c t/t3507-cherry-pick-conflict.sh t/t7607-merge-overwrite.sh
2011-03-23Merge branch 'lt/default-abbrev'Junio C Hamano
* lt/default-abbrev: Rename core.abbrevlength back to core.abbrev Make the default abbrev length configurable
2011-03-11Make the default abbrev length configurableLinus Torvalds
The default of 7 comes from fairly early in git development, when seven hex digits was a lot (it covers about 250+ million hash values). Back then I thought that 65k revisions was a lot (it was what we were about to hit in BK), and each revision tends to be about 5-10 new objects or so, so a million objects was a big number. These days, the kernel isn't even the largest git project, and even the kernel has about 220k revisions (_much_ bigger than the BK tree ever was) and we are approaching two million objects. At that point, seven hex digits is still unique for a lot of them, but when we're talking about just two orders of magnitude difference between number of objects and the hash size, there _will_ be collisions in truncated hash values. It's no longer even close to unrealistic - it happens all the time. We should both increase the default abbrev that was unrealistically small, _and_ add a way for people to set their own default per-project in the git config file. This is the first step to first make it configurable; the default of 7 is not raised yet. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-10i18n: git-describe basic messagesÆvar Arnfjörð Bjarmason
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-19for_each_hash: allow passing a 'void *data' pointer to callbackLinus Torvalds
For the find_exact_renames() function, this allows us to pass the diff_options structure pointer to the low-level routines. We will use that to distinguish between the "rename" and "copy" cases. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-22Merge branch 'tf/commit-list-prefix'Junio C Hamano
* tf/commit-list-prefix: commit: Add commit_list prefix in two function names. Conflicts: sha1_name.c
2010-12-09describe: Delay looking up commits until searching for an inexact matchAnders Kaseorg
Now that struct commit.util is not used until after we've checked that the argument doesn't exactly match a tag, we can wait until then to look up the commits for each tag. This avoids a lot of I/O on --exact-match queries in repositories with many tags. For example, 'git describe --exact-match HEAD' becomes about 12 times faster on a cold cache (3.2s instead of 39s) in a linux-2.6 repository with 2000 packed tags. That is a huge win for the interactivity of the __git_ps1 shell prompt helper when on a detached HEAD. Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-09describe: Store commit_names in a hash table by commit SHA1Anders Kaseorg
describe is currently forced to look up the commit at each tag in order to store the struct commit_name pointers in struct commit.util. For --exact-match queries, those lookups are wasteful. In preparation for removing them, put the commit_names into a hash table, indexed by commit SHA1, that can be used to quickly check for exact matches. Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-09describe: Do not use a flex array in struct commit_nameAnders Kaseorg
Now add_to_known_names overwrites commit_names in place when multiple tags point to the same commit. This will make it easier to store commit_names in a hash table. Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-09describe: Use for_each_rawrefAnders Kaseorg
Don't waste time checking for dangling refs; they wouldn't affect the output of 'git describe' anyway. Although this does not gain much performance by itself, it does in conjunction with the next commits. Signed-off-by: Anders Kaseorg <andersk@ksplice.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>