8 #include "gpg-interface.h"
9 #include "string-list.h"
12 #define COMMIT_NOT_FROM_GRAPH 0xFFFFFFFF
13 #define GENERATION_NUMBER_INFINITY 0xFFFFFFFF
14 #define GENERATION_NUMBER_MAX 0x3FFFFFFF
15 #define GENERATION_NUMBER_ZERO 0
19 struct commit_list *next;
23 * The size of this struct matters in full repo walk operations like
24 * 'git clone' or 'git gc'. Consider using commit-slab to attach data
25 * to a commit instead of adding new fields here.
30 struct commit_list *parents;
33 * If the commit is loaded from the commit-graph file, then this
34 * member may be NULL. Only access it through get_commit_tree()
35 * or get_commit_tree_oid().
37 struct tree *maybe_tree;
43 extern int save_commit_buffer;
44 extern const char *commit_type;
46 /* While we can decorate any object with a name, it's only used for commits.. */
47 struct name_decoration {
48 struct name_decoration *next;
50 char name[FLEX_ARRAY];
53 enum decoration_type {
56 DECORATION_REF_REMOTE,
63 void add_name_decoration(enum decoration_type type, const char *name, struct object *obj);
64 const struct name_decoration *get_name_decoration(const struct object *obj);
66 struct commit *lookup_commit(const struct object_id *oid);
67 #define lookup_commit_reference(r, o) \
68 lookup_commit_reference_##r(o)
69 struct commit *lookup_commit_reference_the_repository(const struct object_id *oid);
70 #define lookup_commit_reference_gently(r, o, q) \
71 lookup_commit_reference_gently_##r(o, q)
72 struct commit *lookup_commit_reference_gently_the_repository(
73 const struct object_id *oid,
75 struct commit *lookup_commit_reference_by_name(const char *name);
78 * Look up object named by "oid", dereference tag as necessary,
79 * get a commit and return it. If "oid" does not dereference to
80 * a commit, use ref_name to report an error and die.
82 struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name);
84 int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size, int check_graph);
85 int parse_commit_gently(struct commit *item, int quiet_on_missing);
86 static inline int parse_commit(struct commit *item)
88 return parse_commit_gently(item, 0);
90 void parse_commit_or_die(struct commit *item);
93 * Associate an object buffer with the commit. The ownership of the
94 * memory is handed over to the commit, and must be free()-able.
96 void set_commit_buffer(struct commit *, void *buffer, unsigned long size);
99 * Get any cached object buffer associated with the commit. Returns NULL
100 * if none. The resulting memory should not be freed.
102 const void *get_cached_commit_buffer(const struct commit *, unsigned long *size);
105 * Get the commit's object contents, either from cache or by reading the object
106 * from disk. The resulting memory should not be modified, and must be given
107 * to unuse_commit_buffer when the caller is done.
109 const void *get_commit_buffer(const struct commit *, unsigned long *size);
112 * Tell the commit subsytem that we are done with a particular commit buffer.
113 * The commit and buffer should be the input and return value, respectively,
114 * from an earlier call to get_commit_buffer. The buffer may or may not be
115 * freed by this call; callers should not access the memory afterwards.
117 void unuse_commit_buffer(const struct commit *, const void *buffer);
120 * Free any cached object buffer associated with the commit.
122 void free_commit_buffer(struct commit *);
124 struct tree *get_commit_tree(const struct commit *);
125 struct object_id *get_commit_tree_oid(const struct commit *);
128 * Release memory related to a commit, including the parent list and
129 * any cached object buffer.
131 void release_commit_memory(struct commit *c);
134 * Disassociate any cached object buffer from the commit, but do not free it.
135 * The buffer (or NULL, if none) is returned.
137 const void *detach_commit_buffer(struct commit *, unsigned long *sizep);
139 /* Find beginning and length of commit subject. */
140 int find_commit_subject(const char *commit_buffer, const char **subject);
142 struct commit_list *commit_list_insert(struct commit *item,
143 struct commit_list **list);
144 struct commit_list **commit_list_append(struct commit *commit,
145 struct commit_list **next);
146 unsigned commit_list_count(const struct commit_list *l);
147 struct commit_list *commit_list_insert_by_date(struct commit *item,
148 struct commit_list **list);
149 void commit_list_sort_by_date(struct commit_list **list);
151 /* Shallow copy of the input list */
152 struct commit_list *copy_commit_list(struct commit_list *list);
154 void free_commit_list(struct commit_list *list);
156 struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
158 extern int has_non_ascii(const char *text);
159 extern const char *logmsg_reencode(const struct commit *commit,
160 char **commit_encoding,
161 const char *output_encoding);
162 extern const char *skip_blank_lines(const char *msg);
164 /** Removes the first commit from a list sorted by date, and adds all
167 struct commit *pop_most_recent_commit(struct commit_list **list,
170 struct commit *pop_commit(struct commit_list **stack);
172 void clear_commit_marks(struct commit *commit, unsigned int mark);
173 void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark);
176 enum rev_sort_order {
177 REV_SORT_IN_GRAPH_ORDER = 0,
178 REV_SORT_BY_COMMIT_DATE,
179 REV_SORT_BY_AUTHOR_DATE
183 * Performs an in-place topological sort of list supplied.
185 * invariant of resulting list is:
186 * a reachable from b => ord(b) < ord(a)
187 * sort_order further specifies:
188 * REV_SORT_IN_GRAPH_ORDER: try to show a commit on a single-parent
190 * REV_SORT_BY_COMMIT_DATE: show eligible commits in committer-date order.
192 void sort_in_topological_order(struct commit_list **, enum rev_sort_order);
194 struct commit_graft {
195 struct object_id oid;
196 int nr_parent; /* < 0 if shallow commit */
197 struct object_id parent[FLEX_ARRAY]; /* more */
199 typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
201 struct commit_graft *read_graft_line(struct strbuf *line);
202 int register_commit_graft(struct repository *r, struct commit_graft *, int);
203 struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid);
205 extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2);
206 extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos);
207 extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
209 /* To be used only when object flags after this call no longer matter */
210 extern struct commit_list *get_merge_bases_many_dirty(struct commit *one, int n, struct commit **twos);
212 /* largest positive number a signed 32-bit integer can contain */
213 #define INFINITE_DEPTH 0x7fffffff
217 extern int register_shallow(struct repository *r, const struct object_id *oid);
218 extern int unregister_shallow(const struct object_id *oid);
219 extern int for_each_commit_graft(each_commit_graft_fn, void *);
220 extern int is_repository_shallow(struct repository *r);
221 extern struct commit_list *get_shallow_commits(struct object_array *heads,
222 int depth, int shallow_flag, int not_shallow_flag);
223 extern struct commit_list *get_shallow_commits_by_rev_list(
224 int ac, const char **av, int shallow_flag, int not_shallow_flag);
225 extern void set_alternate_shallow_file(struct repository *r, const char *path, int override);
226 extern int write_shallow_commits(struct strbuf *out, int use_pack_protocol,
227 const struct oid_array *extra);
228 extern void setup_alternate_shallow(struct lock_file *shallow_lock,
229 const char **alternate_shallow_file,
230 const struct oid_array *extra);
231 extern const char *setup_temporary_shallow(const struct oid_array *extra);
232 extern void advertise_shallow_grafts(int);
234 struct shallow_info {
235 struct oid_array *shallow;
237 int *theirs, nr_theirs;
238 struct oid_array *ref;
240 /* for receive-pack */
241 uint32_t **used_shallow;
242 int *need_reachability_test;
245 struct commit **commits;
249 extern void prepare_shallow_info(struct shallow_info *, struct oid_array *);
250 extern void clear_shallow_info(struct shallow_info *);
251 extern void remove_nonexistent_theirs_shallow(struct shallow_info *);
252 extern void assign_shallow_commits_to_refs(struct shallow_info *info,
255 extern int delayed_reachability_test(struct shallow_info *si, int c);
256 extern void prune_shallow(int show_only);
257 extern struct trace_key trace_shallow;
259 int is_descendant_of(struct commit *, struct commit_list *);
260 int in_merge_bases(struct commit *, struct commit *);
261 int in_merge_bases_many(struct commit *, int, struct commit **);
263 extern int interactive_add(int argc, const char **argv, const char *prefix, int patch);
264 extern int run_add_interactive(const char *revision, const char *patch_mode,
265 const struct pathspec *pathspec);
268 * Takes a list of commits and returns a new list where those
269 * have been removed that can be reached from other commits in
270 * the list. It is useful for, e.g., reducing the commits
271 * randomly thrown at the git-merge command and removing
272 * redundant commits that the user shouldn't have given to it.
274 * This function destroys the STALE bit of the commit objects'
277 extern struct commit_list *reduce_heads(struct commit_list *heads);
280 * Like `reduce_heads()`, except it replaces the list. Use this
281 * instead of `foo = reduce_heads(foo);` to avoid memory leaks.
283 extern void reduce_heads_replace(struct commit_list **heads);
285 struct commit_extra_header {
286 struct commit_extra_header *next;
292 extern void append_merge_tag_headers(struct commit_list *parents,
293 struct commit_extra_header ***tail);
295 extern int commit_tree(const char *msg, size_t msg_len,
296 const struct object_id *tree,
297 struct commit_list *parents, struct object_id *ret,
298 const char *author, const char *sign_commit);
300 extern int commit_tree_extended(const char *msg, size_t msg_len,
301 const struct object_id *tree,
302 struct commit_list *parents,
303 struct object_id *ret, const char *author,
304 const char *sign_commit,
305 struct commit_extra_header *);
307 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
309 extern void free_commit_extra_headers(struct commit_extra_header *extra);
312 * Search the commit object contents given by "msg" for the header "key".
313 * Returns a pointer to the start of the header contents, or NULL. The length
314 * of the header, up to the first newline, is returned via out_len.
316 * Note that some headers (like mergetag) may be multi-line. It is the caller's
317 * responsibility to parse further in this case!
319 extern const char *find_commit_header(const char *msg, const char *key,
322 /* Find the end of the log message, the right place for a new trailer. */
323 extern int ignore_non_trailer(const char *buf, size_t len);
325 typedef int (*each_mergetag_fn)(struct commit *commit, struct commit_extra_header *extra,
328 extern int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data);
330 struct merge_remote_desc {
331 struct object *obj; /* the named object, could be a tag */
332 char name[FLEX_ARRAY];
334 extern struct merge_remote_desc *merge_remote_util(struct commit *);
335 extern void set_merge_remote_desc(struct commit *commit,
336 const char *name, struct object *obj);
339 * Given "name" from the command line to merge, find the commit object
340 * and return it, while storing merge_remote_desc in its ->util field,
341 * to allow callers to tell if we are told to merge a tag.
343 struct commit *get_merge_parent(const char *name);
345 extern int parse_signed_commit(const struct commit *commit,
346 struct strbuf *message, struct strbuf *signature);
347 extern int remove_signature(struct strbuf *buf);
350 * Check the signature of the given commit. The result of the check is stored
351 * in sig->check_result, 'G' for a good signature, 'U' for a good signature
352 * from an untrusted signer, 'B' for a bad signature and 'N' for no signature
353 * at all. This may allocate memory for sig->gpg_output, sig->gpg_status,
354 * sig->signer and sig->key.
356 extern int check_commit_signature(const struct commit *commit, struct signature_check *sigc);
358 int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused);
359 int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused);
361 LAST_ARG_MUST_BE_NULL
362 extern int run_commit_hook(int editor_is_used, const char *index_file, const char *name, ...);
364 #endif /* COMMIT_H */