Andrew's git - gitweb.git/blob

   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
  11struct commit_list {
  12        struct commit *item;
  13        struct commit_list *next;
  14};
  15
  16struct 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
  26extern int save_commit_buffer;
  27extern const char *commit_type;
  28
  29/* While we can decorate any object with a name, it's only used for commits.. */
  30extern struct decoration name_decoration;
  31struct name_decoration {
  32        struct name_decoration *next;
  33        int type;
  34        char name[1];
  35};
  36
  37struct commit *lookup_commit(const unsigned char *sha1);
  38struct commit *lookup_commit_reference(const unsigned char *sha1);
  39struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
  40                                              int quiet);
  41struct 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 */
  48struct commit *lookup_commit_or_die(const unsigned char *sha1, const char *ref_name);
  49
  50int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size);
  51int parse_commit(struct commit *item);
  52void parse_commit_or_die(struct commit *item);
  53
  54/* Find beginning and length of commit subject. */
  55int find_commit_subject(const char *commit_buffer, const char **subject);
  56
  57struct commit_list *commit_list_insert(struct commit *item,
  58                                        struct commit_list **list);
  59struct commit_list **commit_list_append(struct commit *commit,
  60                                        struct commit_list **next);
  61unsigned commit_list_count(const struct commit_list *l);
  62struct commit_list *commit_list_insert_by_date(struct commit *item,
  63                                    struct commit_list **list);
  64void commit_list_sort_by_date(struct commit_list **list);
  65
  66/* Shallow copy of the input list */
  67struct commit_list *copy_commit_list(struct commit_list *list);
  68
  69void free_commit_list(struct commit_list *list);
  70
  71/* Commit formats */
  72enum 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
  86struct 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
 112struct userformat_want {
 113        unsigned notes:1;
 114};
 115
 116extern int has_non_ascii(const char *text);
 117struct rev_info; /* in revision.h, it circularly uses enum cmit_fmt */
 118extern char *logmsg_reencode(const struct commit *commit,
 119                             char **commit_encoding,
 120                             const char *output_encoding);
 121extern void logmsg_free(char *msg, const struct commit *commit);
 122extern void get_commit_format(const char *arg, struct rev_info *);
 123extern const char *format_subject(struct strbuf *sb, const char *msg,
 124                                  const char *line_separator);
 125extern void userformat_find_requirements(const char *fmt, struct userformat_want *w);
 126extern void format_commit_message(const struct commit *commit,
 127                                  const char *format, struct strbuf *sb,
 128                                  const struct pretty_print_context *context);
 129extern void pretty_print_commit(struct pretty_print_context *pp,
 130                                const struct commit *commit,
 131                                struct strbuf *sb);
 132extern void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
 133                           struct strbuf *sb);
 134void pp_user_info(struct pretty_print_context *pp,
 135                  const char *what, struct strbuf *sb,
 136                  const char *line, const char *encoding);
 137void 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);
 142void 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 **/
 151struct commit *pop_most_recent_commit(struct commit_list **list,
 152                                      unsigned int mark);
 153
 154struct commit *pop_commit(struct commit_list **stack);
 155
 156void clear_commit_marks(struct commit *commit, unsigned int mark);
 157void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark);
 158void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark);
 159
 160
 161enum 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 */
 177void sort_in_topological_order(struct commit_list **, enum rev_sort_order);
 178
 179struct commit_graft {
 180        unsigned char sha1[20];
 181        int nr_parent; /* < 0 if shallow commit */
 182        unsigned char parent[FLEX_ARRAY][20]; /* more */
 183};
 184typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
 185
 186struct commit_graft *read_graft_line(char *buf, int len);
 187int register_commit_graft(struct commit_graft *, int);
 188struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 189
 190extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
 191extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
 192extern 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
 197struct sha1_array;
 198struct ref;
 199extern int register_shallow(const unsigned char *sha1);
 200extern int unregister_shallow(const unsigned char *sha1);
 201extern int for_each_commit_graft(each_commit_graft_fn, void *);
 202extern int is_repository_shallow(void);
 203extern struct commit_list *get_shallow_commits(struct object_array *heads,
 204                int depth, int shallow_flag, int not_shallow_flag);
 205extern void check_shallow_file_for_update(void);
 206extern void set_alternate_shallow_file(const char *path, int override);
 207extern int write_shallow_commits(struct strbuf *out, int use_pack_protocol,
 208                                 const struct sha1_array *extra);
 209extern void setup_alternate_shallow(struct lock_file *shallow_lock,
 210                                    const char **alternate_shallow_file,
 211                                    const struct sha1_array *extra);
 212extern const char *setup_temporary_shallow(const struct sha1_array *extra);
 213extern void advertise_shallow_grafts(int);
 214
 215struct 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
 230extern void prepare_shallow_info(struct shallow_info *, struct sha1_array *);
 231extern void clear_shallow_info(struct shallow_info *);
 232extern void remove_nonexistent_theirs_shallow(struct shallow_info *);
 233extern void assign_shallow_commits_to_refs(struct shallow_info *info,
 234                                           uint32_t **used,
 235                                           int *ref_status);
 236extern int delayed_reachability_test(struct shallow_info *si, int c);
 237extern void prune_shallow(int show_only);
 238
 239int is_descendant_of(struct commit *, struct commit_list *);
 240int in_merge_bases(struct commit *, struct commit *);
 241int in_merge_bases_many(struct commit *, int, struct commit **);
 242
 243extern int interactive_add(int argc, const char **argv, const char *prefix, int patch);
 244extern int run_add_interactive(const char *revision, const char *patch_mode,
 245                               const struct pathspec *pathspec);
 246
 247static inline int single_parent(struct commit *commit)
 248{
 249        return commit->parents && !commit->parents->next;
 250}
 251
 252struct commit_list *reduce_heads(struct commit_list *heads);
 253
 254struct commit_extra_header {
 255        struct commit_extra_header *next;
 256        char *key;
 257        char *value;
 258        size_t len;
 259};
 260
 261extern void append_merge_tag_headers(struct commit_list *parents,
 262                                     struct commit_extra_header ***tail);
 263
 264extern 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
 268extern 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
 273extern struct commit_extra_header *read_commit_extra_headers(struct commit *, const char **);
 274
 275extern void free_commit_extra_headers(struct commit_extra_header *extra);
 276
 277struct 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 */
 288struct commit *get_merge_parent(const char *name);
 289
 290extern int parse_signed_commit(const unsigned char *sha1,
 291                               struct strbuf *message, struct strbuf *signature);
 292extern 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 */
 303extern void check_commit_signature(const struct commit* commit, struct signature_check *sigc);
 304
 305int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused);
 306
 307#endif /* COMMIT_H */