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2021-04-30Merge branch 'ds/sparse-index-protections'Libravatar Junio C Hamano1-0/+3
Builds on top of the sparse-index infrastructure to mark operations that are not ready to mark with the sparse index, causing them to fall back on fully-populated index that they always have worked with. * ds/sparse-index-protections: (47 commits) name-hash: use expand_to_path() sparse-index: expand_to_path() name-hash: don't add directories to name_hash revision: ensure full index resolve-undo: ensure full index read-cache: ensure full index pathspec: ensure full index merge-recursive: ensure full index entry: ensure full index dir: ensure full index update-index: ensure full index stash: ensure full index rm: ensure full index merge-index: ensure full index ls-files: ensure full index grep: ensure full index fsck: ensure full index difftool: ensure full index commit: ensure full index checkout: ensure full index ...
2021-04-14difftool: ensure full indexLibravatar Derrick Stolee1-0/+3
Before iterating over all cache entries, ensure that a sparse index has been expanded to a full one to avoid unexpected behavior. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Reviewed-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-03-23entry: extract a header file for entry.c functionsLibravatar Matheus Tavares1-0/+1
The declarations of entry.c's public functions and structures currently reside in cache.h. Although not many, they contribute to the size of cache.h and, when changed, cause the unnecessary recompilation of modules that don't really use these functions. So let's move them to a new entry.h header. While at it let's also move a comment related to checkout_entry() from entry.c to entry.h as it's more useful to describe the function there. Original-patch-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-11Use new HASHMAP_INIT macro to simplify hashmap initializationLibravatar Elijah Newren1-5/+4
Now that hashamp has lazy initialization and a HASHMAP_INIT macro, hashmaps allocated on the stack can be initialized without a call to hashmap_init() and in some cases makes the code a bit shorter. Convert some callsites over to take advantage of this. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-30strvec: rename struct fieldsLibravatar Jeff King1-1/+1
The "argc" and "argv" names made sense when the struct was argv_array, but now they're just confusing. Let's rename them to "nr" (which we use for counts elsewhere) and "v" (which is rather terse, but reads well when combined with typical variable names like "args.v"). Note that we have to update all of the callers immediately. Playing tricks with the preprocessor is hard here, because we wouldn't want to rewrite unrelated tokens. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: fix indentation in renamed callsLibravatar Jeff King1-6/+6
Code which split an argv_array call across multiple lines, like: argv_array_pushl(&args, "one argument", "another argument", "and more", NULL); was recently mechanically renamed to use strvec, which results in mis-matched indentation like: strvec_pushl(&args, "one argument", "another argument", "and more", NULL); Let's fix these up to align the arguments with the opening paren. I did this manually by sifting through the results of: git jump grep 'strvec_.*,$' and liberally applying my editor's auto-format. Most of the changes are of the form shown above, though I also normalized a few that had originally used a single-tab indentation (rather than our usual style of aligning with the open paren). I also rewrapped a couple of obvious cases (e.g., where previously too-long lines became short enough to fit on one), but I wasn't aggressive about it. In cases broken to three or more lines, the grouping of arguments is sometimes meaningful, and it wasn't worth my time or reviewer time to ponder each case individually. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: convert builtin/ callers away from argv_array nameLibravatar Jeff King1-7/+7
We eventually want to drop the argv_array name and just use strvec consistently. There's no particular reason we have to do it all at once, or care about interactions between converted and unconverted bits. Because of our preprocessor compat layer, the names are interchangeable to the compiler (so even a definition and declaration using different names is OK). This patch converts all of the files in builtin/ to keep the diff to a manageable size. The conversion was done purely mechanically with: git ls-files '*.c' '*.h' | xargs perl -i -pe ' s/ARGV_ARRAY/STRVEC/g; s/argv_array/strvec/g; ' and then selectively staging files with "git add builtin/". We'll deal with any indentation/style fallouts separately. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-07-28strvec: rename files from argv-array to strvecLibravatar Jeff King1-1/+1
This requires updating #include lines across the code-base, but that's all fairly mechanical, and was done with: git ls-files '*.c' '*.h' | xargs perl -i -pe 's/argv-array.h/strvec.h/' Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap: remove type arg from hashmap_{get,put,remove}_entryLibravatar Eric Wong1-1/+1
Since these macros already take a `keyvar' pointer of a known type, we can rely on OFFSETOF_VAR to get the correct offset without relying on non-portable `__typeof__' and `offsetof'. Argument order is also rearranged, so `keyvar' and `member' are sequential as they are used as: `keyvar->member' Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07OFFSETOF_VAR macro to simplify hashmap iteratorsLibravatar Eric Wong1-2/+2
While we cannot rely on a `__typeof__' operator being portable to use with `offsetof'; we can calculate the pointer offset using an existing pointer and the address of a member using pointer arithmetic for compilers without `__typeof__'. This allows us to simplify usage of hashmap iterator macros by not having to specify a type when a pointer of that type is already given. In the future, list iterator macros (e.g. list_for_each_entry) may also be implemented using OFFSETOF_VAR to save hackers the trouble of using container_of/list_entry macros and without relying on non-portable `__typeof__'. v3: use `__typeof__' to avoid clang warnings Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap: use *_entry APIs for iterationLibravatar Eric Wong1-4/+4
Inspired by list_for_each_entry in the Linux kernel. Once again, these are somewhat compromised usability-wise by compilers lacking __typeof__ support. Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap_cmp_fn takes hashmap_entry paramsLibravatar Eric Wong1-12/+19
Another step in eliminating the requirement of hashmap_entry being the first member of a struct. Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap_get{,_from_hash} return "struct hashmap_entry *"Libravatar Eric Wong1-1/+1
Update callers to use hashmap_get_entry, hashmap_get_entry_from_hash or container_of as appropriate. This is another step towards eliminating the requirement of hashmap_entry being the first field in a struct. Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap_get takes "const struct hashmap_entry *"Libravatar Eric Wong1-2/+3
This is less error-prone than "const void *" as the compiler now detects invalid types being passed. Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap_add takes "struct hashmap_entry *"Libravatar Eric Wong1-3/+3
This is less error-prone than "void *" as the compiler now detects invalid types being passed. Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-07hashmap_entry_init takes "struct hashmap_entry *"Libravatar Eric Wong1-3/+3
C compilers do type checking to make life easier for us. So rely on that and update all hashmap_entry_init callers to take "struct hashmap_entry *" to avoid future bugs while improving safety and readability. Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Derrick Stolee <stolee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-05-19Merge branch 'js/difftool-no-index'Libravatar Junio C Hamano1-1/+2
The "--dir-diff" mode of "git difftool" is not useful in "--no-index" mode; they are now explicitly marked as mutually incompatible. * js/difftool-no-index: difftool --no-index: error out on --dir-diff (and don't crash)
2019-05-19Merge branch 'dl/difftool-mergetool'Libravatar Junio C Hamano1-8/+5
Update "git difftool" and "git mergetool" so that the combinations of {diff,merge}.{tool,guitool} configuration variables serve as fallback settings of each other in a sensible order. * dl/difftool-mergetool: difftool: fallback on merge.guitool difftool: make --gui, --tool and --extcmd mutually exclusive mergetool: fallback to tool when guitool unavailable mergetool--lib: create gui_mode function mergetool: use get_merge_tool function t7610: add mergetool --gui tests t7610: unsuppress output
2019-05-13difftool: fallback on merge.guitoolLibravatar Denton Liu1-8/+2
In git-difftool.txt, it says 'git difftool' falls back to 'git mergetool' config variables when the difftool equivalents have not been defined. However, when `diff.guitool` is missing, it doesn't fallback to anything. Make git-difftool fallback to `merge.guitool` when `diff.guitool` is missing. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-05-13difftool: make --gui, --tool and --extcmd mutually exclusiveLibravatar Denton Liu1-0/+3
In git-difftool, these options specify which tool to ultimately run. As a result, they are logically conflicting. Explicitly disallow these options from being used together. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-05-09difftool --no-index: error out on --dir-diff (and don't crash)Libravatar Johannes Schindelin1-1/+2
In `--no-index` mode, we now no longer require a worktree nor a repository. But some code paths in `difftool` expect those to be present. The most notable such code path is the `--dir-diff` one: we use the existing checkout machinery to copy the files, and that machinery looks up replacement refs, looks at alternate ODBs, wants to use the worktree path, etc. Rather than running into segmentation faults, let's die with an informative error message. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-04-25Merge branch 'bc/hash-transition-16'Libravatar Junio C Hamano1-6/+4
Conversion from unsigned char[20] to struct object_id continues. * bc/hash-transition-16: (35 commits) gitweb: make hash size independent Git.pm: make hash size independent read-cache: read data in a hash-independent way dir: make untracked cache extension hash size independent builtin/difftool: use parse_oid_hex refspec: make hash size independent archive: convert struct archiver_args to object_id builtin/get-tar-commit-id: make hash size independent get-tar-commit-id: parse comment record hash: add a function to lookup hash algorithm by length remote-curl: make hash size independent http: replace sha1_to_hex http: compute hash of downloaded objects using the_hash_algo http: replace hard-coded constant with the_hash_algo http-walker: replace sha1_to_hex http-push: remove remaining uses of sha1_to_hex http-backend: allow 64-character hex names http-push: convert to use the_hash_algo builtin/pull: make hash-size independent builtin/am: make hash size independent ...
2019-04-01builtin/difftool: use parse_oid_hexLibravatar brian m. carlson1-6/+4
Instead of using get_oid_hex and adding constants to the result, use parse_oid_hex to make this code independent of the hash size. Additionally, correct a typo that would cause us to print one too few characters on error, since we will already have incremented the pointer to point to the beginning of the object ID before we get to printing the error message. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-18difftool: allow running outside Git worktrees with --no-indexLibravatar Johannes Schindelin1-3/+10
As far as this developer can tell, the conversion from a Perl script to a built-in caused the regression in the difftool that it no longer runs outside of a Git worktree (with `--no-index`, of course). It is a bit embarrassing that it took over two years after retiring the Perl version to discover this regression, but at least we now know, and can do something, about it. This fixes https://github.com/git-for-windows/git/issues/2123 Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-18difftool: remove obsolete (and misleading) commentLibravatar Johannes Schindelin1-1/+0
We will always spawn something from `git difftool`, so we will always have to set `GIT_DIR` and `GIT_WORK_TREE`. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-02-06Merge branch 'nd/the-index-final'Libravatar Junio C Hamano1-0/+1
The assumption to work on the single "in-core index" instance has been reduced from the library-ish part of the codebase. * nd/the-index-final: cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switch read-cache.c: remove the_* from index_has_changes() merge-recursive.c: remove implicit dependency on the_repository merge-recursive.c: remove implicit dependency on the_index sha1-name.c: remove implicit dependency on the_index read-cache.c: replace update_index_if_able with repo_& read-cache.c: kill read_index() checkout: avoid the_index when possible repository.c: replace hold_locked_index() with repo_hold_locked_index() notes-utils.c: remove the_repository references grep: use grep_opt->repo instead of explict repo argument
2019-01-24cache.h: flip NO_THE_INDEX_COMPATIBILITY_MACROS switchLibravatar Nguyễn Thái Ngọc Duy1-0/+1
By default, index compat macros are off from now on, because they could hide the_index dependency. Only those in builtin can use it. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-14checkout: print something when checking out pathsLibravatar Nguyễn Thái Ngọc Duy1-1/+1
One of the problems with "git checkout" is that it does so many different things and could confuse people specially when we fail to handle ambiguation correctly. One way to help with that is tell the user what sort of operation is actually carried out. When switching branches, we always print something unless --quiet, either - "HEAD is now at ..." - "Reset branch ..." - "Already on ..." - "Switched to and reset ..." - "Switched to a new branch ..." - "Switched to branch ..." Checking out paths however is silent. Print something so that if we got the user intention wrong, they won't waste too much time to find that out. For the remaining cases of checkout we now print either - "Checked out ... paths out of the index" - "Checked out ... paths out of <abbrev hash>" Since the purpose of printing this is to help disambiguate. Only do it when "--" is missing. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-19Merge branch 'nd/the-index'Libravatar Junio C Hamano1-1/+1
Various codepaths in the core-ish part learn to work on an arbitrary in-core index structure, not necessarily the default instance "the_index". * nd/the-index: (23 commits) revision.c: reduce implicit dependency the_repository revision.c: remove implicit dependency on the_index ws.c: remove implicit dependency on the_index tree-diff.c: remove implicit dependency on the_index submodule.c: remove implicit dependency on the_index line-range.c: remove implicit dependency on the_index userdiff.c: remove implicit dependency on the_index rerere.c: remove implicit dependency on the_index sha1-file.c: remove implicit dependency on the_index patch-ids.c: remove implicit dependency on the_index merge.c: remove implicit dependency on the_index merge-blobs.c: remove implicit dependency on the_index ll-merge.c: remove implicit dependency on the_index diff-lib.c: remove implicit dependency on the_index read-cache.c: remove implicit dependency on the_index diff.c: remove implicit dependency on the_index grep.c: remove implicit dependency on the_index diff.c: remove the_index dependency in textconv() functions blame.c: rename "repo" argument to "r" combine-diff.c: remove implicit dependency on the_index ...
2018-09-21sha1-file.c: remove implicit dependency on the_indexLibravatar Nguyễn Thái Ngọc Duy1-1/+1
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-29convert "oidcmp() == 0" to oideq()Libravatar Jeff King1-2/+2
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>
2018-08-17Merge branch 'rs/parse-opt-lithelp'Libravatar Junio C Hamano1-2/+2
The parse-options machinery learned to refrain from enclosing placeholder string inside a "<bra" and "ket>" pair automatically without PARSE_OPT_LITERAL_ARGHELP. Existing help text for option arguments that are not formatted correctly have been identified and fixed. * rs/parse-opt-lithelp: parse-options: automatically infer PARSE_OPT_LITERAL_ARGHELP shortlog: correct option help for -w send-pack: specify --force-with-lease argument help explicitly pack-objects: specify --index-version argument help explicitly difftool: remove angular brackets from argument help add, update-index: fix --chmod argument help push: use PARSE_OPT_LITERAL_ARGHELP instead of unbalanced brackets
2018-08-03difftool: remove angular brackets from argument helpLibravatar René Scharfe1-2/+2
Parseopt wraps arguments in a pair of angular brackets by default, signifying that the user needs to replace it with a value of the documented type. Remove the pairs from the option definitions to duplication and confusion. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-02Merge branch 'jm/cache-entry-from-mem-pool'Libravatar Junio C Hamano1-3/+3
For a large tree, the index needs to hold many cache entries allocated on heap. These cache entries are now allocated out of a dedicated memory pool to amortize malloc(3) overhead. * jm/cache-entry-from-mem-pool: block alloc: add validations around cache_entry lifecyle block alloc: allocate cache entries from mem_pool mem-pool: fill out functionality mem-pool: add life cycle management functions mem-pool: only search head block for available space block alloc: add lifecycle APIs for cache_entry structs read-cache: teach make_cache_entry to take object_id read-cache: teach refresh_cache_entry to take istate
2018-07-18Merge branch 'sb/object-store-grafts'Libravatar Junio C Hamano1-0/+1
The conversion to pass "the_repository" and then "a_repository" throughout the object access API continues. * sb/object-store-grafts: commit: allow lookup_commit_graft to handle arbitrary repositories commit: allow prepare_commit_graft to handle arbitrary repositories shallow: migrate shallow information into the object parser path.c: migrate global git_path_* to take a repository argument cache: convert get_graft_file to handle arbitrary repositories commit: convert read_graft_file to handle arbitrary repositories commit: convert register_commit_graft to handle arbitrary repositories commit: convert commit_graft_pos() to handle arbitrary repositories shallow: add repository argument to is_repository_shallow shallow: add repository argument to check_shallow_file_for_update shallow: add repository argument to register_shallow shallow: add repository argument to set_alternate_shallow_file commit: add repository argument to lookup_commit_graft commit: add repository argument to prepare_commit_graft commit: add repository argument to read_graft_file commit: add repository argument to register_commit_graft commit: add repository argument to commit_graft_pos object: move grafts to object parser object-store: move object access functions to object-store.h
2018-07-03block alloc: add lifecycle APIs for cache_entry structsLibravatar Jameson Miller1-3/+3
It has been observed that the time spent loading an index with a large number of entries is partly dominated by malloc() calls. This change is in preparation for using memory pools to reduce the number of malloc() calls made to allocate cahce entries when loading an index. Add an API to allocate and discard cache entries, abstracting the details of managing the memory backing the cache entries. This commit does actually change how memory is managed - this will be done in a later commit in the series. This change makes the distinction between cache entries that are associated with an index and cache entries that are not associated with an index. A main use of cache entries is with an index, and we can optimize the memory management around this. We still have other cases where a cache entry is not persisted with an index, and so we need to handle the "transient" use case as well. To keep the congnitive overhead of managing the cache entries, there will only be a single discard function. This means there must be enough information kept with the cache entry so that we know how to discard them. A summary of the main functions in the API is: make_cache_entry: create cache entry for use in an index. Uses specified parameters to populate cache_entry fields. make_empty_cache_entry: Create an empty cache entry for use in an index. Returns cache entry with empty fields. make_transient_cache_entry: create cache entry that is not used in an index. Uses specified parameters to populate cache_entry fields. make_empty_transient_cache_entry: create cache entry that is not used in an index. Returns cache entry with empty fields. discard_cache_entry: A single function that knows how to discard a cache entry regardless of how it was allocated. Signed-off-by: Jameson Miller <jamill@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-03read-cache: teach make_cache_entry to take object_idLibravatar Jameson Miller1-2/+2
Teach make_cache_entry function to take object_id instead of a SHA-1. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-01Merge branch 'nd/use-opt-int-set-f'Libravatar Junio C Hamano1-5/+4
Code simplification. * nd/use-opt-int-set-f: Use OPT_SET_INT_F() for cmdline option specification
2018-05-30Merge branch 'ma/lockfile-cleanup'Libravatar Junio C Hamano1-1/+1
Code clean-up to adjust to a more recent lockfile API convention that allows lockfile instances kept on the stack. * ma/lockfile-cleanup: lock_file: move static locks into functions lock_file: make function-local locks non-static refs.c: do not die if locking fails in `delete_pseudoref()` refs.c: do not die if locking fails in `write_pseudoref()` t/helper/test-write-cache: clean up lock-handling
2018-05-24Use OPT_SET_INT_F() for cmdline option specificationLibravatar Nguyễn Thái Ngọc Duy1-5/+4
The only thing these commands need is extra parseopt flag which can be passed in by OPT_SET_INT_F() and it is a bit more compact than full struct initialization. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-16object-store: move object access functions to object-store.hLibravatar Stefan Beller1-0/+1
This should make these functions easier to find and cache.h less overwhelming to read. In particular, this moves: - read_object_file - oid_object_info - write_object_file As a result, most of the codebase needs to #include object-store.h. In this patch the #include is only added to files that would fail to compile otherwise. It would be better to #include wherever identifiers from the header are used. That can happen later when we have better tooling for it. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-10lock_file: make function-local locks non-staticLibravatar Martin Ågren1-1/+1
Placing `struct lock_file`s on the stack used to be a bad idea, because the temp- and lockfile-machinery would keep a pointer into the struct. But after 076aa2cbd (tempfile: auto-allocate tempfiles on heap, 2017-09-05), we can safely have lockfiles on the stack. (This applies even if a user returns early, leaving a locked lock behind.) These `struct lock_file`s are local to their respective functions and we can drop their staticness. For good measure, I have inspected these sites and come to believe that they always release the lock, with the possible exception of bailing out using `die()` or `exit()` or by returning from a `cmd_foo()`. As pointed out by Jeff King, it would be bad if someone held on to a `struct lock_file *` for some reason. After some grepping, I agree with his findings: no-one appears to be doing that. Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-11exec_cmd: rename to use dash in file nameLibravatar Stefan Beller1-1/+1
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>
2018-03-14sha1_file: convert read_sha1_file to struct object_idLibravatar brian m. carlson1-1/+1
Convert read_sha1_file to take a pointer to struct object_id and rename it read_object_file. Do the same for read_sha1_file_extended. Convert one use in grep.c to use the new function without any other code change, since the pointer being passed is a void pointer that is already initialized with a pointer to struct object_id. Update the declaration and definitions of the modified functions, and apply the following semantic patch to convert the remaining callers: @@ expression E1, E2, E3; @@ - read_sha1_file(E1.hash, E2, E3) + read_object_file(&E1, E2, E3) @@ expression E1, E2, E3; @@ - read_sha1_file(E1->hash, E2, E3) + read_object_file(E1, E2, E3) @@ expression E1, E2, E3, E4; @@ - read_sha1_file_extended(E1.hash, E2, E3, E4) + read_object_file_extended(&E1, E2, E3, E4) @@ expression E1, E2, E3, E4; @@ - read_sha1_file_extended(E1->hash, E2, E3, E4) + read_object_file_extended(E1, E2, E3, E4) Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-07read-cache: leave lock in right state in `write_locked_index()`Libravatar Martin Ågren1-1/+0
If the original version of `write_locked_index()` returned with an error, it didn't roll back the lockfile unless the error occured at the very end, during closing/committing. See commit 03b866477 (read-cache: new API write_locked_index instead of write_index/write_cache, 2014-06-13). In commit 9f41c7a6b (read-cache: close index.lock in do_write_index, 2017-04-26), we learned to close the lock slightly earlier in the callstack. That was mostly a side-effect of lockfiles being implemented using temporary files, but didn't cause any real harm. Recently, commit 076aa2cbd (tempfile: auto-allocate tempfiles on heap, 2017-09-05) introduced a subtle bug. If the temporary file is deleted (i.e., the lockfile is rolled back), the tempfile-pointer in the `struct lock_file` will be left dangling. Thus, an attempt to reuse the lockfile, or even just to roll it back, will induce undefined behavior -- most likely a crash. Besides not crashing, we clearly want to make things consistent. The guarantees which the lockfile-machinery itself provides is A) if we ask to commit and it fails, roll back, and B) if we ask to close and it fails, do _not_ roll back. Let's do the same for consistency. Do not delete the temporary file in `do_write_index()`. One of its callers, `write_locked_index()` will thereby avoid rolling back the lock. The other caller, `write_shared_index()`, will delete its temporary file anyway. Both of these callers will avoid undefined behavior (crashing). Teach `write_locked_index(..., COMMIT_LOCK)` to roll back the lock before returning. If we have already succeeded and committed, it will be a noop. Simplify the existing callers where we now have a superfluous call to `rollback_lockfile()`. That should keep future readers from wondering why the callers are inconsistent. Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-20sha1_file: convert index_fd to struct object_idLibravatar Patryk Obara1-1/+1
Convert all remaining callers as well. Signed-off-by: Patryk Obara <patryk.obara@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-07-05builtin/difftool.c: drop hashmap_cmp_fn castLibravatar Stefan Beller1-15/+22
Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-30hashmap.h: compare function has access to a data fieldLibravatar Stefan Beller1-9/+15
When using the hashmap a common need is to have access to caller provided data in the compare function. A couple of times we abuse the keydata field to pass in the data needed. This happens for example in patch-ids.c. This patch changes the function signature of the compare function to have one more void pointer available. The pointer given for each invocation of the compare function must be defined in the init function of the hashmap and is just passed through. Documentation of this new feature is deferred to a later patch. This is a rather mechanical conversion, just adding the new pass-through parameter. However while at it improve the naming of the fields of all compare functions used by hashmaps by ensuring unused parameters are prefixed with 'unused_' and naming the parameters what they are (instead of 'unused' make it 'unused_keydata'). Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-24Merge branch 'bw/config-h'Libravatar Junio C Hamano1-0/+1
Fix configuration codepath to pay proper attention to commondir that is used in multi-worktree situation, and isolate config API into its own header file. * bw/config-h: config: don't implicitly use gitdir or commondir config: respect commondir setup: teach discover_git_directory to respect the commondir config: don't include config.h by default config: remove git_config_iter config: create config.h
2017-06-15config: don't include config.h by defaultLibravatar Brandon Williams1-0/+1
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>