1 #define _XOPEN_SOURCE /* glibc2 needs this */
2 #define _BSD_SOURCE /* for tm.tm_gmtoff */
10 * revision.h leaves the low 16 bits of the "flags" field of the
11 * revision data structure unused. We use it for a "reachable from
12 * this commit <N>" bitmask.
14 #define MAX_COMMITS 16
16 static int show_edges = 0;
17 static int basemask = 0;
19 static void read_cache_file(const char *path)
21 die("no revtree cache file yet");
25 * Some revisions are less interesting than others.
27 * For example, if we use a cache-file, that one may contain
28 * revisions that were never used. They are never interesting.
30 * And sometimes we're only interested in "edge" commits, ie
31 * places where the marking changes between parent and child.
33 static int interesting(struct commit *rev)
35 unsigned mask = rev->object.flags;
40 struct commit_list *p = rev->parents;
42 if (mask != p->item->object.flags)
54 void process_commit(unsigned char *sha1)
56 struct commit_list *parents;
57 struct commit *obj = lookup_commit(sha1);
60 parents = obj->parents;
62 process_commit(parents->item->object.sha1);
63 parents = parents->next;
68 * Usage: rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id2>]
70 * The cache-file can be quite important for big trees. This is an
71 * expensive operation if you have to walk the whole chain of
72 * parents in a tree with a long revision history.
74 int main(int argc, char **argv)
78 unsigned char sha1[MAX_COMMITS][20];
81 * First - pick up all the revisions we can (both from
82 * caches and from commit file chains).
84 for (i = 1; i < argc ; i++) {
87 if (!strcmp(arg, "--cache")) {
88 read_cache_file(argv[2]);
93 if (!strcmp(arg, "--edges")) {
102 if (nr >= MAX_COMMITS || get_sha1_hex(arg, sha1[nr]))
103 usage("rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id>]");
104 process_commit(sha1[nr]);
109 * Now we have the maximal tree. Walk the different sha files back to the root.
111 for (i = 0; i < nr; i++)
112 mark_reachable(&lookup_commit(sha1[i])->object, 1 << i);
115 * Now print out the results..
117 for (i = 0; i < nr_objs; i++) {
118 struct object *obj = objs[i];
119 struct commit *commit;
120 struct commit_list *p;
122 if (obj->type != commit_type)
125 commit = (struct commit *) obj;
127 if (!interesting(commit))
130 printf("%lu %s:%d", commit->date, sha1_to_hex(obj->sha1),
134 printf(" %s:%d", sha1_to_hex(p->item->object.sha1),
135 p->item->object.flags);