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
   9 struct commit_list {
  10         struct commit *item;
  11         struct commit_list *next;
  12 };
  13
  14 struct commit {
  15         struct object object;
  16         void *util;
  17         unsigned int indegree;
  18         unsigned long date;
  19         struct commit_list *parents;
  20         struct tree *tree;
  21         char *buffer;
  22 };
  23
  24 extern int save_commit_buffer;
  25 extern const char *commit_type;
  26
  27 /* While we can decorate any object with a name, it's only used for commits.. */
  28 extern struct decoration name_decoration;
  29 struct name_decoration {
  30         struct name_decoration *next;
  31         int type;
  32         char name[1];
  33 };
  34
  35 struct commit *lookup_commit(const unsigned char *sha1);
  36 struct commit *lookup_commit_reference(const unsigned char *sha1);
  37 struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
  38                                               int quiet);
  39 struct commit *lookup_commit_reference_by_name(const char *name);
  40
  41 /*
  42  * Look up object named by "sha1", dereference tag as necessary,
  43  * get a commit and return it. If "sha1" does not dereference to
  44  * a commit, use ref_name to report an error and die.
  45  */
  46 struct commit *lookup_commit_or_die(const unsigned char *sha1, const char *ref_name);
  47
  48 int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size);
  49 int parse_commit(struct commit *item);
  50
  51 /* Find beginning and length of commit subject. */
  52 int find_commit_subject(const char *commit_buffer, const char **subject);
  53
  54 struct commit_list *commit_list_insert(struct commit *item,
  55                                         struct commit_list **list);
  56 struct commit_list **commit_list_append(struct commit *commit,
  57                                         struct commit_list **next);
  58 unsigned commit_list_count(const struct commit_list *l);
  59 struct commit_list *commit_list_insert_by_date(struct commit *item,
  60                                     struct commit_list **list);
  61 void commit_list_sort_by_date(struct commit_list **list);
  62
  63 void free_commit_list(struct commit_list *list);
  64
  65 /* Commit formats */
  66 enum cmit_fmt {
  67         CMIT_FMT_RAW,
  68         CMIT_FMT_MEDIUM,
  69         CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
  70         CMIT_FMT_SHORT,
  71         CMIT_FMT_FULL,
  72         CMIT_FMT_FULLER,
  73         CMIT_FMT_ONELINE,
  74         CMIT_FMT_EMAIL,
  75         CMIT_FMT_USERFORMAT,
  76
  77         CMIT_FMT_UNSPECIFIED
  78 };
  79
  80 struct pretty_print_context {
  81         enum cmit_fmt fmt;
  82         int abbrev;
  83         const char *subject;
  84         const char *after_subject;
  85         int preserve_subject;
  86         enum date_mode date_mode;
  87         unsigned date_mode_explicit:1;
  88         int need_8bit_cte;
  89         int show_notes;
  90         struct reflog_walk_info *reflog_info;
  91         const char *output_encoding;
  92 };
  93
  94 struct userformat_want {
  95         unsigned notes:1;
  96 };
  97
  98 extern int has_non_ascii(const char *text);
  99 struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
 100 extern char *logmsg_reencode(const struct commit *commit,
 101                              const char *output_encoding);
 102 extern char *reencode_commit_message(const struct commit *commit,
 103                                      const char **encoding_p);
 104 extern void get_commit_format(const char *arg, struct rev_info *);
 105 extern const char *format_subject(struct strbuf *sb, const char *msg,
 106                                   const char *line_separator);
 107 extern void userformat_find_requirements(const char *fmt, struct userformat_want *w);
 108 extern void format_commit_message(const struct commit *commit,
 109                                   const char *format, struct strbuf *sb,
 110                                   const struct pretty_print_context *context);
 111 extern void pretty_print_commit(const struct pretty_print_context *pp,
 112                                 const struct commit *commit,
 113                                 struct strbuf *sb);
 114 extern void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
 115                            struct strbuf *sb);
 116 void pp_user_info(const struct pretty_print_context *pp,
 117                   const char *what, struct strbuf *sb,
 118                   const char *line, const char *encoding);
 119 void pp_title_line(const struct pretty_print_context *pp,
 120                    const char **msg_p,
 121                    struct strbuf *sb,
 122                    const char *encoding,
 123                    int need_8bit_cte);
 124 void pp_remainder(const struct pretty_print_context *pp,
 125                   const char **msg_p,
 126                   struct strbuf *sb,
 127                   int indent);
 128
 129
 130 /** Removes the first commit from a list sorted by date, and adds all
 131  * of its parents.
 132  **/
 133 struct commit *pop_most_recent_commit(struct commit_list **list,
 134                                       unsigned int mark);
 135
 136 struct commit *pop_commit(struct commit_list **stack);
 137
 138 void clear_commit_marks(struct commit *commit, unsigned int mark);
 139 void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark);
 140
 141 /*
 142  * Performs an in-place topological sort of list supplied.
 143  *
 144  *   invariant of resulting list is:
 145  *      a reachable from b => ord(b) < ord(a)
 146  *   in addition, when lifo == 0, commits on parallel tracks are
 147  *   sorted in the dates order.
 148  */
 149 void sort_in_topological_order(struct commit_list ** list, int lifo);
 150
 151 struct commit_graft {
 152         unsigned char sha1[20];
 153         int nr_parent; /* < 0 if shallow commit */
 154         unsigned char parent[FLEX_ARRAY][20]; /* more */
 155 };
 156 typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
 157
 158 struct commit_graft *read_graft_line(char *buf, int len);
 159 int register_commit_graft(struct commit_graft *, int);
 160 struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 161
 162 extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
 163 extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
 164 extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
 165
 166 extern int register_shallow(const unsigned char *sha1);
 167 extern int unregister_shallow(const unsigned char *sha1);
 168 extern int for_each_commit_graft(each_commit_graft_fn, void *);
 169 extern int is_repository_shallow(void);
 170 extern struct commit_list *get_shallow_commits(struct object_array *heads,
 171                 int depth, int shallow_flag, int not_shallow_flag);
 172
 173 int is_descendant_of(struct commit *, struct commit_list *);
 174 int in_merge_bases(struct commit *, struct commit **, int);
 175
 176 extern int interactive_add(int argc, const char **argv, const char *prefix, int patch);
 177 extern int run_add_interactive(const char *revision, const char *patch_mode,
 178                                const char **pathspec);
 179
 180 static inline int single_parent(struct commit *commit)
 181 {
 182         return commit->parents && !commit->parents->next;
 183 }
 184
 185 struct commit_list *reduce_heads(struct commit_list *heads);
 186
 187 struct commit_extra_header {
 188         struct commit_extra_header *next;
 189         char *key;
 190         char *value;
 191         size_t len;
 192 };
 193
 194 extern void append_merge_tag_headers(struct commit_list *parents,
 195                                      struct commit_extra_header ***tail);
 196
 197 extern int commit_tree(const struct strbuf *msg, unsigned char *tree,
 198                        struct commit_list *parents, unsigned char *ret,
 199                        const char *author, const char *sign_commit);
 200
 201 extern int commit_tree_extended(const struct strbuf *msg, unsigned char *tree,
 202                                 struct commit_list *parents, unsigned char *ret,
 203                                 const char *author, const char *sign_commit,
 204                                 struct commit_extra_header *);
 205
 206 extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
 207 extern struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);
 208
 209 extern void free_commit_extra_headers(struct commit_extra_header *extra);
 210
 211 struct merge_remote_desc {
 212         struct object *obj; /* the named object, could be a tag */
 213         const char *name;
 214 };
 215 #define merge_remote_util(commit) ((struct merge_remote_desc *)((commit)->util))
 216
 217 /*
 218  * Given "name" from the command line to merge, find the commit object
 219  * and return it, while storing merge_remote_desc in its ->util field,
 220  * to allow callers to tell if we are told to merge a tag.
 221  */
 222 struct commit *get_merge_parent(const char *name);
 223
 224 extern int parse_signed_commit(const unsigned char *sha1,
 225                                struct strbuf *message, struct strbuf *signature);
 226 #endif /* COMMIT_H */