alloc: allow arbitrary repositories for alloc functions
[git/git.git] / commit.h
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1#ifndef COMMIT_H
2#define COMMIT_H
3
4#include "object.h"
5#include "tree.h"
674d1727 6#include "strbuf.h"
ca135e7a 7#include "decorate.h"
ffb6d7d5 8#include "gpg-interface.h"
a9080475 9#include "string-list.h"
cf394719 10#include "pretty.h"
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11
12struct commit_list {
13 struct commit *item;
14 struct commit_list *next;
15};
16
17struct commit {
18 struct object object;
d3ff6f55 19 void *util;
96c4f4a3 20 unsigned int index;
dddbad72 21 timestamp_t date;
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22 struct commit_list *parents;
23 struct tree *tree;
24};
25
60ab26de 26extern int save_commit_buffer;
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27extern const char *commit_type;
28
ca135e7a 29/* While we can decorate any object with a name, it's only used for commits.. */
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30struct name_decoration {
31 struct name_decoration *next;
eb3005e2 32 int type;
2e3dfb21 33 char name[FLEX_ARRAY];
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34};
35
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36enum decoration_type {
37 DECORATION_NONE = 0,
38 DECORATION_REF_LOCAL,
39 DECORATION_REF_REMOTE,
40 DECORATION_REF_TAG,
41 DECORATION_REF_STASH,
42 DECORATION_REF_HEAD,
43 DECORATION_GRAFTED,
44};
45
46void add_name_decoration(enum decoration_type type, const char *name, struct object *obj);
2608c249 47const struct name_decoration *get_name_decoration(const struct object *obj);
662174d2 48
bc83266a 49struct commit *lookup_commit(const struct object_id *oid);
50struct commit *lookup_commit_reference(const struct object_id *oid);
51struct commit *lookup_commit_reference_gently(const struct object_id *oid,
f76412ed 52 int quiet);
a6fa5992 53struct commit *lookup_commit_reference_by_name(const char *name);
6eb8ae00 54
baf18fc2 55/*
bc83266a 56 * Look up object named by "oid", dereference tag as necessary,
57 * get a commit and return it. If "oid" does not dereference to
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58 * a commit, use ref_name to report an error and die.
59 */
bc83266a 60struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name);
baf18fc2 61
cf7b1cad 62int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size);
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63int parse_commit_gently(struct commit *item, int quiet_on_missing);
64static inline int parse_commit(struct commit *item)
65{
66 return parse_commit_gently(item, 0);
67}
7059dccc 68void parse_commit_or_die(struct commit *item);
6eb8ae00 69
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70/*
71 * Associate an object buffer with the commit. The ownership of the
72 * memory is handed over to the commit, and must be free()-able.
73 */
8597ea3a 74void set_commit_buffer(struct commit *, void *buffer, unsigned long size);
66c2827e 75
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76/*
77 * Get any cached object buffer associated with the commit. Returns NULL
78 * if none. The resulting memory should not be freed.
79 */
8597ea3a 80const void *get_cached_commit_buffer(const struct commit *, unsigned long *size);
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81
82/*
83 * Get the commit's object contents, either from cache or by reading the object
84 * from disk. The resulting memory should not be modified, and must be given
85 * to unuse_commit_buffer when the caller is done.
86 */
8597ea3a 87const void *get_commit_buffer(const struct commit *, unsigned long *size);
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88
89/*
90 * Tell the commit subsytem that we are done with a particular commit buffer.
91 * The commit and buffer should be the input and return value, respectively,
92 * from an earlier call to get_commit_buffer. The buffer may or may not be
93 * freed by this call; callers should not access the memory afterwards.
94 */
95void unuse_commit_buffer(const struct commit *, const void *buffer);
96
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97/*
98 * Free any cached object buffer associated with the commit.
99 */
100void free_commit_buffer(struct commit *);
101
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102/*
103 * Release memory related to a commit, including the parent list and
104 * any cached object buffer.
105 */
106void release_commit_memory(struct commit *c);
107
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108/*
109 * Disassociate any cached object buffer from the commit, but do not free it.
110 * The buffer (or NULL, if none) is returned.
111 */
8597ea3a 112const void *detach_commit_buffer(struct commit *, unsigned long *sizep);
0fb370da 113
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114/* Find beginning and length of commit subject. */
115int find_commit_subject(const char *commit_buffer, const char **subject);
116
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117struct commit_list *commit_list_insert(struct commit *item,
118 struct commit_list **list);
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119struct commit_list **commit_list_append(struct commit *commit,
120 struct commit_list **next);
65319475 121unsigned commit_list_count(const struct commit_list *l);
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122struct commit_list *commit_list_insert_by_date(struct commit *item,
123 struct commit_list **list);
124void commit_list_sort_by_date(struct commit_list **list);
dd97f850 125
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126/* Shallow copy of the input list */
127struct commit_list *copy_commit_list(struct commit_list *list);
128
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129void free_commit_list(struct commit_list *list);
130
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131struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
132
28e9cf65 133extern int has_non_ascii(const char *text);
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134extern const char *logmsg_reencode(const struct commit *commit,
135 char **commit_encoding,
136 const char *output_encoding);
77356122 137extern const char *skip_blank_lines(const char *msg);
e3bc7a3b 138
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139/** Removes the first commit from a list sorted by date, and adds all
140 * of its parents.
141 **/
a6080a0a 142struct commit *pop_most_recent_commit(struct commit_list **list,
58e28af6 143 unsigned int mark);
dd97f850 144
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145struct commit *pop_commit(struct commit_list **stack);
146
f8f9c73c 147void clear_commit_marks(struct commit *commit, unsigned int mark);
e895cb51 148void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark);
f8f9c73c 149
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150
151enum rev_sort_order {
152 REV_SORT_IN_GRAPH_ORDER = 0,
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153 REV_SORT_BY_COMMIT_DATE,
154 REV_SORT_BY_AUTHOR_DATE
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155};
156
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157/*
158 * Performs an in-place topological sort of list supplied.
159 *
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160 * invariant of resulting list is:
161 * a reachable from b => ord(b) < ord(a)
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162 * sort_order further specifies:
163 * REV_SORT_IN_GRAPH_ORDER: try to show a commit on a single-parent
164 * chain together.
165 * REV_SORT_BY_COMMIT_DATE: show eligible commits in committer-date order.
ab580ace 166 */
08f704f2 167void sort_in_topological_order(struct commit_list **, enum rev_sort_order);
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168
169struct commit_graft {
7683e2e6 170 struct object_id oid;
ed09aef0 171 int nr_parent; /* < 0 if shallow commit */
7683e2e6 172 struct object_id parent[FLEX_ARRAY]; /* more */
5040f17e 173};
09d46644 174typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
5040f17e 175
9a934032 176struct commit_graft *read_graft_line(struct strbuf *line);
5040f17e 177int register_commit_graft(struct commit_graft *, int);
8b65a34c 178struct commit_graft *lookup_commit_graft(const struct object_id *oid);
5040f17e 179
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180extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2);
181extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos);
5240c9d7 182extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
7c6f8aaf 183
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184/* To be used only when object flags after this call no longer matter */
185extern struct commit_list *get_merge_bases_many_dirty(struct commit *one, int n, struct commit **twos);
186
41ccfdd9 187/* largest positive number a signed 32-bit integer can contain */
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188#define INFINITE_DEPTH 0x7fffffff
189
910650d2 190struct oid_array;
58babfff 191struct ref;
e92b848c 192extern int register_shallow(const struct object_id *oid);
193extern int unregister_shallow(const struct object_id *oid);
09d46644 194extern int for_each_commit_graft(each_commit_graft_fn, void *);
f43117a6 195extern int is_repository_shallow(void);
ed09aef0 196extern struct commit_list *get_shallow_commits(struct object_array *heads,
f53514bc 197 int depth, int shallow_flag, int not_shallow_flag);
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198extern struct commit_list *get_shallow_commits_by_rev_list(
199 int ac, const char **av, int shallow_flag, int not_shallow_flag);
069c0532 200extern void set_alternate_shallow_file(const char *path, int override);
1a30f5a2 201extern int write_shallow_commits(struct strbuf *out, int use_pack_protocol,
910650d2 202 const struct oid_array *extra);
3125fe52 203extern void setup_alternate_shallow(struct lock_file *shallow_lock,
1a30f5a2 204 const char **alternate_shallow_file,
910650d2 205 const struct oid_array *extra);
206extern const char *setup_temporary_shallow(const struct oid_array *extra);
ad491366 207extern void advertise_shallow_grafts(int);
ed09aef0 208
58babfff 209struct shallow_info {
910650d2 210 struct oid_array *shallow;
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211 int *ours, nr_ours;
212 int *theirs, nr_theirs;
910650d2 213 struct oid_array *ref;
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214
215 /* for receive-pack */
216 uint32_t **used_shallow;
217 int *need_reachability_test;
218 int *reachable;
219 int *shallow_ref;
220 struct commit **commits;
221 int nr_commits;
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222};
223
910650d2 224extern void prepare_shallow_info(struct shallow_info *, struct oid_array *);
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225extern void clear_shallow_info(struct shallow_info *);
226extern void remove_nonexistent_theirs_shallow(struct shallow_info *);
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227extern void assign_shallow_commits_to_refs(struct shallow_info *info,
228 uint32_t **used,
229 int *ref_status);
0a1bc12b 230extern int delayed_reachability_test(struct shallow_info *si, int c);
eab3296c 231extern void prune_shallow(int show_only);
6aa30857 232extern struct trace_key trace_shallow;
ed09aef0 233
7fcdb36e 234int is_descendant_of(struct commit *, struct commit_list *);
a20efee9 235int in_merge_bases(struct commit *, struct commit *);
4c4b27e8 236int in_merge_bases_many(struct commit *, int, struct commit **);
58680165 237
b4bd4668 238extern int interactive_add(int argc, const char **argv, const char *prefix, int patch);
46b5139c 239extern int run_add_interactive(const char *revision, const char *patch_mode,
480ca644 240 const struct pathspec *pathspec);
58680165 241
4da72644
242/*
243 * Takes a list of commits and returns a new list where those
244 * have been removed that can be reached from other commits in
245 * the list. It is useful for, e.g., reducing the commits
246 * randomly thrown at the git-merge command and removing
247 * redundant commits that the user shouldn't have given to it.
248 *
249 * This function destroys the STALE bit of the commit objects'
250 * flags.
251 */
252extern struct commit_list *reduce_heads(struct commit_list *heads);
253
254/*
255 * Like `reduce_heads()`, except it replaces the list. Use this
256 * instead of `foo = reduce_heads(foo);` to avoid memory leaks.
257 */
258extern void reduce_heads_replace(struct commit_list **heads);
98cf9c3b 259
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260struct commit_extra_header {
261 struct commit_extra_header *next;
262 char *key;
263 char *value;
264 size_t len;
265};
266
267extern void append_merge_tag_headers(struct commit_list *parents,
268 struct commit_extra_header ***tail);
269
3ffefb54 270extern int commit_tree(const char *msg, size_t msg_len,
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271 const struct object_id *tree,
272 struct commit_list *parents, struct object_id *ret,
ba3c69a9 273 const char *author, const char *sign_commit);
5231c633 274
3ffefb54 275extern int commit_tree_extended(const char *msg, size_t msg_len,
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276 const struct object_id *tree,
277 struct commit_list *parents,
278 struct object_id *ret, const char *author,
279 const char *sign_commit,
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280 struct commit_extra_header *);
281
c871a1d1 282extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
ed7a42a0 283
5231c633 284extern void free_commit_extra_headers(struct commit_extra_header *extra);
40d52ff7 285
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286/*
287 * Search the commit object contents given by "msg" for the header "key".
288 * Returns a pointer to the start of the header contents, or NULL. The length
289 * of the header, up to the first newline, is returned via out_len.
290 *
291 * Note that some headers (like mergetag) may be multi-line. It is the caller's
292 * responsibility to parse further in this case!
293 */
294extern const char *find_commit_header(const char *msg, const char *key,
295 size_t *out_len);
296
8c384589 297/* Find the end of the log message, the right place for a new trailer. */
710714aa 298extern int ignore_non_trailer(const char *buf, size_t len);
8c384589 299
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300typedef void (*each_mergetag_fn)(struct commit *commit, struct commit_extra_header *extra,
301 void *cb_data);
302
303extern void for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data);
304
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305struct merge_remote_desc {
306 struct object *obj; /* the named object, could be a tag */
5447a76a 307 char name[FLEX_ARRAY];
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308};
309#define merge_remote_util(commit) ((struct merge_remote_desc *)((commit)->util))
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310extern void set_merge_remote_desc(struct commit *commit,
311 const char *name, struct object *obj);
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312
313/*
314 * Given "name" from the command line to merge, find the commit object
315 * and return it, while storing merge_remote_desc in its ->util field,
316 * to allow callers to tell if we are told to merge a tag.
317 */
318struct commit *get_merge_parent(const char *name);
319
218aa3a6 320extern int parse_signed_commit(const struct commit *commit,
0c37f1fc 321 struct strbuf *message, struct strbuf *signature);
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322extern int remove_signature(struct strbuf *buf);
323
ffb6d7d5 324/*
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325 * Check the signature of the given commit. The result of the check is stored
326 * in sig->check_result, 'G' for a good signature, 'U' for a good signature
327 * from an untrusted signer, 'B' for a bad signature and 'N' for no signature
328 * at all. This may allocate memory for sig->gpg_output, sig->gpg_status,
329 * sig->signer and sig->key.
ffb6d7d5 330 */
434060ec 331extern int check_commit_signature(const struct commit *commit, struct signature_check *sigc);
ffb6d7d5 332
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333int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused);
334
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335LAST_ARG_MUST_BE_NULL
336extern int run_commit_hook(int editor_is_used, const char *index_file, const char *name, ...);
337
6eb8ae00 338#endif /* COMMIT_H */