commit.h

   1 #ifndef COMMIT_H
   2 #define COMMIT_H
   3
   4 #include "object.h"
   5 #include "tree.h"
   6 #include "strbuf.h"
   7 #include "decorate.h"
   8 #include "gpg-interface.h"
   9 #include "string-list.h"
  10
  11 struct commit_list {
  12         struct commit *item;
  13         struct commit_list *next;
  14 };
  15
  16 struct commit {
  17         struct object object;
  18         void *util;
  19         unsigned int index;
  20         unsigned long date;
  21         struct commit_list *parents;
  22         struct tree *tree;
  23         char *buffer;
  24 };
  25
  26 extern int save_commit_buffer;
  27 extern const char *commit_type;
  28
  29 /* While we can decorate any object with a name, it's only used for commits.. */
  30 extern struct decoration name_decoration;
  31 struct name_decoration {
  32         struct name_decoration *next;
  33         int type;
  34         char name[1];
  35 };
  36
  37 struct commit *lookup_commit(const unsigned char *sha1);
  38 struct commit *lookup_commit_reference(const unsigned char *sha1);
  39 struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
  40                                               int quiet);
  41 struct commit *lookup_commit_reference_by_name(const char *name);
  42
  43 /*
  44  * Look up object named by "sha1", dereference tag as necessary,
  45  * get a commit and return it. If "sha1" does not dereference to
  46  * a commit, use ref_name to report an error and die.
  47  */
  48 struct commit *lookup_commit_or_die(const unsigned char *sha1, const char *ref_name);
  49
  50 int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size);
  51 int parse_commit(struct commit *item);
  52
  53 /* Find beginning and length of commit subject. */
  54 int find_commit_subject(const char *commit_buffer, const char **subject);
  55
  56 struct commit_list *commit_list_insert(struct commit *item,
  57                                         struct commit_list **list);
  58 struct commit_list **commit_list_append(struct commit *commit,
  59                                         struct commit_list **next);
  60 unsigned commit_list_count(const struct commit_list *l);
  61 struct commit_list *commit_list_insert_by_date(struct commit *item,
  62                                     struct commit_list **list);
  63 void commit_list_sort_by_date(struct commit_list **list);
  64
  65 /* Shallow copy of the input list */
  66 struct commit_list *copy_commit_list(struct commit_list *list);
  67
  68 void free_commit_list(struct commit_list *list);
  69
  70 /* Commit formats */
  71 enum cmit_fmt {
  72         CMIT_FMT_RAW,
  73         CMIT_FMT_MEDIUM,
  74         CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
  75         CMIT_FMT_SHORT,
  76         CMIT_FMT_FULL,
  77         CMIT_FMT_FULLER,
  78         CMIT_FMT_ONELINE,
  79         CMIT_FMT_EMAIL,
  80         CMIT_FMT_USERFORMAT,
  81
  82         CMIT_FMT_UNSPECIFIED
  83 };
  84
  85 struct pretty_print_context {
  86         /*
  87          * Callers should tweak these to change the behavior of pp_* functions.
  88          */
  89         enum cmit_fmt fmt;
  90         int abbrev;
  91         const char *subject;
  92         const char *after_subject;
  93         int preserve_subject;
  94         enum date_mode date_mode;
  95         unsigned date_mode_explicit:1;
  96         int need_8bit_cte;
  97         char *notes_message;
  98         struct reflog_walk_info *reflog_info;
  99         const char *output_encoding;
 100         struct string_list *mailmap;
 101         int color;
 102         struct ident_split *from_ident;
 103
 104         /*
 105          * Fields below here are manipulated internally by pp_* functions and
 106          * should not be counted on by callers.
 107          */
 108         struct string_list in_body_headers;
 109 };
 110
 111 struct userformat_want {
 112         unsigned notes:1;
 113 };
 114
 115 extern int has_non_ascii(const char *text);
 116 struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
 117 extern char *logmsg_reencode(const struct commit *commit,
 118                              char **commit_encoding,
 119                              const char *output_encoding);
 120 extern void logmsg_free(char *msg, const struct commit *commit);
 121 extern void get_commit_format(const char *arg, struct rev_info *);
 122 extern const char *format_subject(struct strbuf *sb, const char *msg,
 123                                   const char *line_separator);
 124 extern void userformat_find_requirements(const char *fmt, struct userformat_want *w);
 125 extern void format_commit_message(const struct commit *commit,
 126                                   const char *format, struct strbuf *sb,
 127                                   const struct pretty_print_context *context);
 128 extern void pretty_print_commit(struct pretty_print_context *pp,
 129                                 const struct commit *commit,
 130                                 struct strbuf *sb);
 131 extern void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
 132                            struct strbuf *sb);
 133 void pp_user_info(struct pretty_print_context *pp,
 134                   const char *what, struct strbuf *sb,
 135                   const char *line, const char *encoding);
 136 void pp_title_line(struct pretty_print_context *pp,
 137                    const char **msg_p,
 138                    struct strbuf *sb,
 139                    const char *encoding,
 140                    int need_8bit_cte);
 141 void pp_remainder(struct pretty_print_context *pp,
 142                   const char **msg_p,
 143                   struct strbuf *sb,
 144                   int indent);
 145
 146
 147 /** Removes the first commit from a list sorted by date, and adds all
 148  * of its parents.
 149  **/
 150 struct commit *pop_most_recent_commit(struct commit_list **list,
 151                                       unsigned int mark);
 152
 153 struct commit *pop_commit(struct commit_list **stack);
 154
 155 void clear_commit_marks(struct commit *commit, unsigned int mark);
 156 void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark);
 157 void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark);
 158
 159
 160 enum rev_sort_order {
 161         REV_SORT_IN_GRAPH_ORDER = 0,
 162         REV_SORT_BY_COMMIT_DATE,
 163         REV_SORT_BY_AUTHOR_DATE
 164 };
 165
 166 /*
 167  * Performs an in-place topological sort of list supplied.
 168  *
 169  *   invariant of resulting list is:
 170  *      a reachable from b => ord(b) < ord(a)
 171  *   sort_order further specifies:
 172  *   REV_SORT_IN_GRAPH_ORDER: try to show a commit on a single-parent
 173  *                            chain together.
 174  *   REV_SORT_BY_COMMIT_DATE: show eligible commits in committer-date order.
 175  */
 176 void sort_in_topological_order(struct commit_list **, enum rev_sort_order);
 177
 178 struct commit_graft {
 179         unsigned char sha1[20];
 180         int nr_parent; /* < 0 if shallow commit */
 181         unsigned char parent[FLEX_ARRAY][20]; /* more */
 182 };
 183 typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
 184
 185 struct commit_graft *read_graft_line(char *buf, int len);
 186 int register_commit_graft(struct commit_graft *, int);
 187 struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 188
 189 extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
 190 extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
 191 extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
 192
 193 /* largest positive number a signed 32-bit integer can contain */
 194 #define INFINITE_DEPTH 0x7fffffff
 195
 196 struct sha1_array;
 197 struct ref;
 198 extern int register_shallow(const unsigned char *sha1);
 199 extern int unregister_shallow(const unsigned char *sha1);
 200 extern int for_each_commit_graft(each_commit_graft_fn, void *);
 201 extern int is_repository_shallow(void);
 202 extern struct commit_list *get_shallow_commits(struct object_array *heads,
 203                 int depth, int shallow_flag, int not_shallow_flag);
 204 extern void check_shallow_file_for_update(void);
 205 extern void set_alternate_shallow_file(const char *path, int override);
 206 extern int write_shallow_commits(struct strbuf *out, int use_pack_protocol,
 207                                  const struct sha1_array *extra);
 208 extern void setup_alternate_shallow(struct lock_file *shallow_lock,
 209                                     const char **alternate_shallow_file,
 210                                     const struct sha1_array *extra);
 211 extern char *setup_temporary_shallow(const struct sha1_array *extra);
 212 extern void advertise_shallow_grafts(int);
 213
 214 struct shallow_info {
 215         struct sha1_array *shallow;
 216         int *ours, nr_ours;
 217         int *theirs, nr_theirs;
 218         struct sha1_array *ref;
 219
 220         /* for receive-pack */
 221         uint32_t **used_shallow;
 222         int *need_reachability_test;
 223         int *reachable;
 224         int *shallow_ref;
 225         struct commit **commits;
 226         int nr_commits;
 227 };
 228
 229 extern void prepare_shallow_info(struct shallow_info *, struct sha1_array *);
 230 extern void clear_shallow_info(struct shallow_info *);
 231 extern void remove_nonexistent_theirs_shallow(struct shallow_info *);
 232 extern void remove_nonexistent_ours_in_pack(struct shallow_info *,
 233                                             struct packed_git *);
 234 extern void assign_shallow_commits_to_refs(struct shallow_info *info,
 235                                            uint32_t **used,
 236                                            int *ref_status);
 237 extern int delayed_reachability_test(struct shallow_info *si, int c);
 238 extern void prune_shallow(int show_only);
 239
 240 int is_descendant_of(struct commit *, struct commit_list *);
 241 int in_merge_bases(struct commit *, struct commit *);
 242 int in_merge_bases_many(struct commit *, int, struct commit **);
 243
 244 extern int interactive_add(int argc, const char **argv, const char *prefix, int patch);
 245 extern int run_add_interactive(const char *revision, const char *patch_mode,
 246                                const struct pathspec *pathspec);
 247
 248 static inline int single_parent(struct commit *commit)
 249 {
 250         return commit->parents && !commit->parents->next;
 251 }
 252
 253 struct commit_list *reduce_heads(struct commit_list *heads);
 254
 255 struct commit_extra_header {
 256         struct commit_extra_header *next;
 257         char *key;
 258         char *value;
 259         size_t len;
 260 };
 261
 262 extern void append_merge_tag_headers(struct commit_list *parents,
 263                                      struct commit_extra_header ***tail);
 264
 265 extern int commit_tree(const struct strbuf *msg, unsigned char *tree,
 266                        struct commit_list *parents, unsigned char *ret,
 267                        const char *author, const char *sign_commit);
 268
 269 extern int commit_tree_extended(const struct strbuf *msg, unsigned char *tree,
 270                                 struct commit_list *parents, unsigned char *ret,
 271                                 const char *author, const char *sign_commit,
 272                                 struct commit_extra_header *);
 273
 274 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
 275
 276 extern void free_commit_extra_headers(struct commit_extra_header *extra);
 277
 278 struct merge_remote_desc {
 279         struct object *obj; /* the named object, could be a tag */
 280         const char *name;
 281 };
 282 #define merge_remote_util(commit) ((struct merge_remote_desc *)((commit)->util))
 283
 284 /*
 285  * Given "name" from the command line to merge, find the commit object
 286  * and return it, while storing merge_remote_desc in its ->util field,
 287  * to allow callers to tell if we are told to merge a tag.
 288  */
 289 struct commit *get_merge_parent(const char *name);
 290
 291 extern int parse_signed_commit(const unsigned char *sha1,
 292                                struct strbuf *message, struct strbuf *signature);
 293 extern void print_commit_list(struct commit_list *list,
 294                               const char *format_cur,
 295                               const char *format_last);
 296
 297 /*
 298  * Check the signature of the given commit. The result of the check is stored
 299  * in sig->check_result, 'G' for a good signature, 'U' for a good signature
 300  * from an untrusted signer, 'B' for a bad signature and 'N' for no signature
 301  * at all.  This may allocate memory for sig->gpg_output, sig->gpg_status,
 302  * sig->signer and sig->key.
 303  */
 304 extern void check_commit_signature(const struct commit* commit, struct signature_check *sigc);
 305
 306 int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused);
 307
 308 #endif /* COMMIT_H */