summaryrefslogtreecommitdiff
path: root/sha1-name.c
AgeCommit message (Collapse)AuthorFilesLines
2019-01-08object-store: factor out odb_loose_cache()Libravatar René Scharfe1-5/+5
Add and use a function for loading the entries of a loose object subdirectory for a given object ID. It frees callers from deriving the fanout key; they can use the returned oid_array reference for lookups or forward range scans. Suggested-by: Jeff King <peff@peff.net> Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-13object-store: provide helpers for loose_objects_cacheLibravatar Jeff King1-20/+1
Our object_directory struct has a loose objects cache that all users of the struct can see. But the only one that knows how to load the cache is find_short_object_filename(). Let's extract that logic in to a reusable function. While we're at it, let's also reset the cache when we re-read the object directories. This shouldn't have an impact on performance, as re-reads are meant to be rare (and are already expensive, so we avoid them with things like OBJECT_INFO_QUICK). Since the cache is already meant to be an approximation, it's tempting to skip even this bit of safety. But it's necessary to allow more code to use it. For instance, fetch-pack explicitly re-reads the object directory after performing its fetch, and would be confused if we didn't clear the cache. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-13sha1-file: use an object_directory for the main object dirLibravatar Jeff King1-14/+3
Our handling of alternate object directories is needlessly different from the main object directory. As a result, many places in the code basically look like this: do_something(r->objects->objdir); for (odb = r->objects->alt_odb_list; odb; odb = odb->next) do_something(odb->path); That gets annoying when do_something() is non-trivial, and we've resorted to gross hacks like creating fake alternates (see find_short_object_filename()). Instead, let's give each raw_object_store a unified list of object_directory structs. The first will be the main store, and everything after is an alternate. Very few callers even care about the distinction, and can just loop over the whole list (and those who care can just treat the first element differently). A few observations: - we don't need r->objects->objectdir anymore, and can just mechanically convert that to r->objects->odb->path - object_directory's path field needs to become a real pointer rather than a FLEX_ARRAY, in order to fill it with expand_base_dir() - we'll call prepare_alt_odb() earlier in many functions (i.e., outside of the loop). This may result in us calling it even when our function would be satisfied looking only at the main odb. But this doesn't matter in practice. It's not a very expensive operation in the first place, and in the majority of cases it will be a noop. We call it already (and cache its results) in prepare_packed_git(), and we'll generally check packs before loose objects. So essentially every program is going to call it immediately once per program. Arguably we should just prepare_alt_odb() immediately upon setting up the repository's object directory, which would save us sprinkling calls throughout the code base (and forgetting to do so has been a source of subtle bugs in the past). But I've stopped short of that here, since there are already a lot of other moving parts in this patch. - Most call sites just get shorter. The check_and_freshen() functions are an exception, because they have entry points to handle local and nonlocal directories separately. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-13handle alternates paths the same as the main object dirLibravatar Jeff King1-2/+6
When we generate loose file paths for the main object directory, the caller provides a buffer to loose_object_path (formerly sha1_file_name). The callers generally keep their own static buffer to avoid excessive reallocations. But for alternate directories, each struct carries its own scratch buffer. This is needlessly different; let's unify them. We could go either direction here, but this patch moves the alternates struct over to the main directory style (rather than vice-versa). Technically the alternates style is more efficient, as it avoids rewriting the object directory name on each call. But this is unlikely to matter in practice, as we avoid reallocations either way (and nobody has ever noticed or complained that the main object directory is copying a few extra bytes before making a much more expensive system call). And this has the advantage that the reusable buffers are tied to particular calls, which makes the invalidation rules simpler (for example, the return value from stat_sha1_file() used to be invalidated by basically any other object call, but now it is affected only by other calls to stat_sha1_file()). We do steal the trick from alt_sha1_path() of returning a pointer to the filled buffer, which makes a few conversions more convenient. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-13rename "alternate_object_database" to "object_directory"Libravatar Jeff King1-10/+10
In preparation for unifying the handling of alt odb's and the normal repo object directory, let's use a more neutral name. This patch is purely mechanical, swapping the type name, and converting any variables named "alt" to "odb". There should be no functional change, but it will reduce the noise in subsequent diffs. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-17Merge branch 'jk/cocci'Libravatar Junio C Hamano1-1/+1
spatch transformation to replace boolean uses of !hashcmp() to newly introduced oideq() is added, and applied, to regain performance lost due to support of multiple hash algorithms. * jk/cocci: show_dirstat: simplify same-content check read-cache: use oideq() in ce_compare functions convert hashmap comparison functions to oideq() convert "hashcmp() != 0" to "!hasheq()" convert "oidcmp() != 0" to "!oideq()" convert "hashcmp() == 0" to hasheq() convert "oidcmp() == 0" to oideq() introduce hasheq() and oideq() coccinelle: use <...> for function exclusion
2018-09-17Merge branch 'ds/reachable'Libravatar Junio C Hamano1-0/+1
The code for computing history reachability has been shuffled, obtained a bunch of new tests to cover them, and then being improved. * ds/reachable: commit-reach: correct accidental #include of C file commit-reach: use can_all_from_reach commit-reach: make can_all_from_reach... linear commit-reach: replace ref_newer logic test-reach: test commit_contains test-reach: test can_all_from_reach_with_flags test-reach: test reduce_heads test-reach: test get_merge_bases_many test-reach: test is_descendant_of test-reach: test in_merge_bases test-reach: create new test tool for ref_newer commit-reach: move can_all_from_reach_with_flags upload-pack: generalize commit date cutoff upload-pack: refactor ok_to_give_up() upload-pack: make reachable() more generic commit-reach: move commit_contains from ref-filter commit-reach: move ref_newer from remote.c commit.h: remove method declarations commit-reach: move walk methods from commit.c
2018-08-29convert "oidcmp() == 0" to oideq()Libravatar Jeff King1-1/+1
Using the more restrictive oideq() should, in the long run, give the compiler more opportunities to optimize these callsites. For now, this conversion should be a complete noop with respect to the generated code. The result is also perhaps a little more readable, as it avoids the "zero is equal" idiom. Since it's so prevalent in C, I think seasoned programmers tend not to even notice it anymore, but it can sometimes make for awkward double negations (e.g., we can drop a few !!oidcmp() instances here). This patch was generated almost entirely by the included coccinelle patch. This mechanical conversion should be completely safe, because we check explicitly for cases where oidcmp() is compared to 0, which is what oideq() is doing under the hood. Note that we don't have to catch "!oidcmp()" separately; coccinelle's standard isomorphisms make sure the two are treated equivalently. I say "almost" because I did hand-edit the coccinelle output to fix up a few style violations (it mostly keeps the original formatting, but sometimes unwraps long lines). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-20Sync 'ds/multi-pack-index' to v2.19.0-rc0Libravatar Junio C Hamano1-0/+70
* ds/multi-pack-index: (23 commits) midx: clear midx on repack packfile: skip loading index if in multi-pack-index midx: prevent duplicate packfile loads midx: use midx in approximate_object_count midx: use existing midx when writing new one midx: use midx in abbreviation calculations midx: read objects from multi-pack-index config: create core.multiPackIndex setting midx: write object offsets midx: write object id fanout chunk midx: write object ids in a chunk midx: sort and deduplicate objects from packfiles midx: read pack names into array multi-pack-index: write pack names in chunk multi-pack-index: read packfile list packfile: generalize pack directory list t5319: expand test data multi-pack-index: load into memory midx: write header information to lockfile multi-pack-index: add 'write' verb ...
2018-08-02Merge branch 'sb/object-store-lookup'Libravatar Junio C Hamano1-15/+18
lookup_commit_reference() and friends have been updated to find in-core object for a specific in-core repository instance. * sb/object-store-lookup: (32 commits) commit.c: allow lookup_commit_reference to handle arbitrary repositories commit.c: allow lookup_commit_reference_gently to handle arbitrary repositories tag.c: allow deref_tag to handle arbitrary repositories object.c: allow parse_object to handle arbitrary repositories object.c: allow parse_object_buffer to handle arbitrary repositories commit.c: allow get_cached_commit_buffer to handle arbitrary repositories commit.c: allow set_commit_buffer to handle arbitrary repositories commit.c: migrate the commit buffer to the parsed object store commit-slabs: remove realloc counter outside of slab struct commit.c: allow parse_commit_buffer to handle arbitrary repositories tag: allow parse_tag_buffer to handle arbitrary repositories tag: allow lookup_tag to handle arbitrary repositories commit: allow lookup_commit to handle arbitrary repositories tree: allow lookup_tree to handle arbitrary repositories blob: allow lookup_blob to handle arbitrary repositories object: allow lookup_object to handle arbitrary repositories object: allow object_as_type to handle arbitrary repositories tag: add repository argument to deref_tag tag: add repository argument to parse_tag_buffer tag: add repository argument to lookup_tag ...
2018-08-02Merge branch 'bc/object-id'Libravatar Junio C Hamano1-5/+7
Conversion from uchar[40] to struct object_id continues. * bc/object-id: pretty: switch hard-coded constants to the_hash_algo sha1-file: convert constants to uses of the_hash_algo log-tree: switch GIT_SHA1_HEXSZ to the_hash_algo->hexsz diff: switch GIT_SHA1_HEXSZ to use the_hash_algo builtin/merge-recursive: make hash independent builtin/merge: switch to use the_hash_algo builtin/fmt-merge-msg: make hash independent builtin/update-index: simplify parsing of cacheinfo builtin/update-index: convert to using the_hash_algo refs/files-backend: use the_hash_algo for writing refs sha1-name: use the_hash_algo when parsing object names strbuf: allocate space with GIT_MAX_HEXSZ commit: express tree entry constants in terms of the_hash_algo hex: switch to using the_hash_algo tree-walk: replace hard-coded constants with the_hash_algo cache: update object ID functions for the_hash_algo
2018-07-24Merge branch 'wc/find-commit-with-pattern-on-detached-head'Libravatar Junio C Hamano1-0/+1
"git rev-parse ':/substring'" did not consider the history leading only to HEAD when looking for a commit with the given substring, when the HEAD is detached. This has been fixed. * wc/find-commit-with-pattern-on-detached-head: sha1-name.c: for ":/", find detached HEAD commits
2018-07-20commit.h: remove method declarationsLibravatar Derrick Stolee1-0/+1
These methods are now declared in commit-reach.h. Remove them from commit.h and add new include statements in all files that require these declarations. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-20midx: use midx in abbreviation calculationsLibravatar Derrick Stolee1-0/+70
Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-16sha1-name: use the_hash_algo when parsing object namesLibravatar brian m. carlson1-5/+7
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29tag: add repository argument to deref_tagLibravatar Stefan Beller1-4/+7
Add a repository argument to allow the callers of deref_tag to be more specific about which repository to act on. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29tag: add repository argument to lookup_tagLibravatar Stefan Beller1-1/+1
Add a repository argument to allow the callers of lookup_tag to be more specific about which repository to act on. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29commit: add repository argument to lookup_commitLibravatar Stefan Beller1-1/+1
Add a repository argument to allow callers of lookup_commit to be more specific about which repository to handle. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29commit: add repository argument to lookup_commit_referenceLibravatar Stefan Beller1-2/+2
Add a repository argument to allow callers of lookup_commit_reference to be more specific about which repository to handle. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29commit: add repository argument to lookup_commit_reference_gentlyLibravatar Stefan Beller1-2/+2
Add a repository argument to allow callers of lookup_commit_reference_gently to be more specific about which repository to handle. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-29object: add repository argument to parse_objectLibravatar Stefan Beller1-7/+7
Add a repository argument to allow the callers of parse_object to be more specific about which repository to act on. This is a small mechanical change; it doesn't change the implementation to handle repositories other than the_repository yet. As with the previous commits, use a macro to catch callers passing a repository other than the_repository at compile time. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-30Merge branch 'ab/get-short-oid'Libravatar Junio C Hamano1-8/+42
When a short hexadecimal string is used to name an object but there are multiple objects that share the string as the prefix of their names, the code lists these ambiguous candidates in a help message. These object names are now sorted according to their types for easier eyeballing. * ab/get-short-oid: get_short_oid: sort ambiguous objects by type, then SHA-1 sha1-name.c: move around the collect_ambiguous() function git-p4: change "commitish" typo to "committish" sha1-array.h: align function arguments sha1-name.c: remove stray newline
2018-05-30Merge branch 'bc/object-id'Libravatar Junio C Hamano1-3/+2
Conversion from uchar[20] to struct object_id continues. * bc/object-id: (42 commits) merge-one-file: compute empty blob object ID add--interactive: compute the empty tree value Update shell scripts to compute empty tree object ID sha1_file: only expose empty object constants through git_hash_algo dir: use the_hash_algo for empty blob object ID sequencer: use the_hash_algo for empty tree object ID cache-tree: use is_empty_tree_oid sha1_file: convert cached object code to struct object_id builtin/reset: convert use of EMPTY_TREE_SHA1_BIN builtin/receive-pack: convert one use of EMPTY_TREE_SHA1_HEX wt-status: convert two uses of EMPTY_TREE_SHA1_HEX submodule: convert several uses of EMPTY_TREE_SHA1_HEX sequencer: convert one use of EMPTY_TREE_SHA1_HEX merge: convert empty tree constant to the_hash_algo builtin/merge: switch tree functions to use object_id builtin/am: convert uses of EMPTY_TREE_SHA1_BIN to the_hash_algo sha1-file: add functions for hex empty tree and blob OIDs builtin/receive-pack: avoid hard-coded constants for push certs diff: specify abbreviation size in terms of the_hash_algo upload-pack: replace use of several hard-coded constants ...
2018-05-30Merge branch 'js/use-bug-macro'Libravatar Junio C Hamano1-2/+2
Developer support update, by using BUG() macro instead of die() to mark codepaths that should not happen more clearly. * js/use-bug-macro: BUG_exit_code: fix sparse "symbol not declared" warning Convert remaining die*(BUG) messages Replace all die("BUG: ...") calls by BUG() ones run-command: use BUG() to report bugs, not die() test-tool: help verifying BUG() code paths
2018-05-23Merge branch 'sb/oid-object-info'Libravatar Junio C Hamano1-6/+6
The codepath around object-info API has been taught to take the repository object (which in turn tells the API which object store the objects are to be located). * sb/oid-object-info: cache.h: allow oid_object_info to handle arbitrary repositories packfile: add repository argument to cache_or_unpack_entry packfile: add repository argument to unpack_entry packfile: add repository argument to read_object packfile: add repository argument to packed_object_info packfile: add repository argument to packed_to_object_type packfile: add repository argument to retry_bad_packed_offset cache.h: add repository argument to oid_object_info cache.h: add repository argument to oid_object_info_extended
2018-05-23Merge branch 'ds/lazy-load-trees'Libravatar Junio C Hamano1-1/+1
The code has been taught to use the duplicated information stored in the commit-graph file to learn the tree object name for a commit to avoid opening and parsing the commit object when it makes sense to do so. * ds/lazy-load-trees: coccinelle: avoid wrong transformation suggestions from commit.cocci commit-graph: lazy-load trees for commits treewide: replace maybe_tree with accessor methods commit: create get_commit_tree() method treewide: rename tree to maybe_tree
2018-05-11get_short_oid: sort ambiguous objects by type, then SHA-1Libravatar Ævar Arnfjörð Bjarmason1-1/+36
Change the output emitted when an ambiguous object is encountered so that we show tags first, then commits, followed by trees, and finally blobs. Within each type we show objects in hashcmp() order. Before this change the objects were only ordered by hashcmp(). The reason for doing this is that the output looks better as a result, e.g. the v2.17.0 tag before this change on "git show e8f2" would display: hint: The candidates are: hint: e8f2093055 tree hint: e8f21caf94 commit 2013-06-24 - bash prompt: print unique detached HEAD abbreviated object name hint: e8f21d02f7 blob hint: e8f21d577c blob hint: e8f25a3a50 tree hint: e8f26250fa commit 2017-02-03 - Merge pull request #996 from jeffhostetler/jeffhostetler/register_rename_src hint: e8f2650052 tag v2.17.0 hint: e8f2867228 blob hint: e8f28d537c tree hint: e8f2a35526 blob hint: e8f2bc0c06 commit 2015-05-10 - Documentation: note behavior for multiple remote.url entries hint: e8f2cf6ec0 tree Now we'll instead show: hint: e8f2650052 tag v2.17.0 hint: e8f21caf94 commit 2013-06-24 - bash prompt: print unique detached HEAD abbreviated object name hint: e8f26250fa commit 2017-02-03 - Merge pull request #996 from jeffhostetler/jeffhostetler/register_rename_src hint: e8f2bc0c06 commit 2015-05-10 - Documentation: note behavior for multiple remote.url entries hint: e8f2093055 tree hint: e8f25a3a50 tree hint: e8f28d537c tree hint: e8f2cf6ec0 tree hint: e8f21d02f7 blob hint: e8f21d577c blob hint: e8f2867228 blob hint: e8f2a35526 blob Since we show the commit data in the output that's nicely aligned once we sort by object type. The decision to show tags before commits is pretty arbitrary. I don't want to order by object_type since there tags come last after blobs, which doesn't make sense if we want to show the most important things first. I could display them after commits, but it's much less likely that we'll display a tag, so if there is one it makes sense to show it prominently at the top. A note on the implementation: Derrick rightly pointed out[1] that we're bending over backwards here in get_short_oid() to first de-duplicate the list, and then emit it, but could simply do it in one step. The reason for that is that oid_array_for_each_unique() doesn't actually require that the array be sorted by oid_array_sort(), it just needs to be sorted in some order that guarantees that all objects with the same ID are adjacent to one another, which (barring a hash collision, which'll be someone else's problem) the sort_ambiguous() function does. I agree that would be simpler for this code, and had forgotten why I initially wrote it like this[2]. But on further reflection I think it's better to do more work here just so we're not underhandedly using the oid-array API where we lie about the list being sorted. That would break any subsequent use of oid_array_lookup() in subtle ways. I could get around that by hacking the API itself to support this use-case and documenting it, which I did as a WIP patch in [3], but I think it's too much code smell just for this one call site. It's simpler for the API to just introduce a oid_array_for_each() function to eagerly spew out the list without sorting or de-duplication, and then do the de-duplication and sorting in two passes. 1. https://public-inbox.org/git/20180501130318.58251-1-dstolee@microsoft.com/ 2. https://public-inbox.org/git/876047ze9v.fsf@evledraar.gmail.com/ 3. https://public-inbox.org/git/874ljrzctc.fsf@evledraar.gmail.com/ Helped-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-11sha1-name.c: move around the collect_ambiguous() functionLibravatar Ævar Arnfjörð Bjarmason1-6/+6
A subsequent change will make use of this static function in the get_short_oid() function, which is defined above where the collect_ambiguous() function is now. Without this we'd then have a compilation error due to a forward declaration. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-11sha1-name.c: remove stray newlineLibravatar Ævar Arnfjörð Bjarmason1-1/+0
This stray newline was accidentally introduced in d2b7d9c7ed ("sha1_name: convert disambiguate_hint_fn to take object_id", 2017-03-26). Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-06Replace all die("BUG: ...") calls by BUG() onesLibravatar Johannes Schindelin1-2/+2
In d8193743e08 (usage.c: add BUG() function, 2017-05-12), a new macro was introduced to use for reporting bugs instead of die(). It was then subsequently used to convert one single caller in 588a538ae55 (setup_git_env: convert die("BUG") to BUG(), 2017-05-12). The cover letter of the patch series containing this patch (cf 20170513032414.mfrwabt4hovujde2@sigill.intra.peff.net) is not terribly clear why only one call site was converted, or what the plan is for other, similar calls to die() to report bugs. Let's just convert all remaining ones in one fell swoop. This trick was performed by this invocation: sed -i 's/die("BUG: /BUG("/g' $(git grep -l 'die("BUG' \*.c) Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-11sha1_name.c: rename to use dash in file nameLibravatar Stefan Beller1-0/+1734
This is more consistent with the project style. The majority of Git's source files use dashes in preference to underscores in their file names. Signed-off-by: Stefan Beller <sbeller@google.com>