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