rev-list.c

   1 #include "cache.h"
   2 #include "commit.h"
   3
   4 #define SEEN            (1u << 0)
   5 #define INTERESTING     (1u << 1)
   6 #define UNINTERESTING   (1u << 2)
   7
   8 static const char rev_list_usage[] =
   9         "usage: git-rev-list [OPTION] commit-id <commit-id>\n"
  10                       "  --max-count=nr\n"
  11                       "  --max-age=epoch\n"
  12                       "  --min-age=epoch\n"
  13                       "  --header";
  14
  15 static void mark_parents_uninteresting(struct commit *commit)
  16 {
  17         struct commit_list *parents = commit->parents;
  18
  19         while (parents) {
  20                 struct commit *commit = parents->item;
  21                 commit->object.flags |= UNINTERESTING;
  22                 parents = parents->next;
  23         }
  24 }
  25
  26 static int everybody_uninteresting(struct commit_list *list)
  27 {
  28         while (list) {
  29                 struct commit *commit = list->item;
  30                 list = list->next;
  31                 if (commit->object.flags & UNINTERESTING)
  32                         continue;
  33                 return 0;
  34         }
  35         return 1;
  36 }
  37
  38 int main(int argc, char **argv)
  39 {
  40         int nr_sha;
  41         unsigned char sha1[2][20];
  42         struct commit_list *list = NULL;
  43         struct commit *commit, *end;
  44         int i, verbose_header = 0;
  45         unsigned long max_age = -1;
  46         unsigned long min_age = -1;
  47         int max_count = -1;
  48
  49         nr_sha = 0;
  50         for (i = 1 ; i < argc; i++) {
  51                 char *arg = argv[i];
  52
  53                 if (!strncmp(arg, "--max-count=", 12)) {
  54                         max_count = atoi(arg + 12);
  55                         continue;
  56                 }
  57                 if (!strncmp(arg, "--max-age=", 10)) {
  58                         max_age = atoi(arg + 10);
  59                         continue;
  60                 }
  61                 if (!strncmp(arg, "--min-age=", 10)) {
  62                         min_age = atoi(arg + 10);
  63                         continue;
  64                 }
  65                 if (!strcmp(arg, "--header")) {
  66                         verbose_header = 1;
  67                         continue;
  68                 }
  69
  70                 if (nr_sha > 2 || get_sha1(arg, sha1[nr_sha]))
  71                         usage(rev_list_usage);
  72                 nr_sha++;
  73         }
  74
  75         if (!nr_sha)
  76                 usage(rev_list_usage);
  77
  78         commit = lookup_commit_reference(sha1[0]);
  79         if (!commit || parse_commit(commit) < 0)
  80                 die("bad starting commit object");
  81
  82         end = NULL;
  83         if (nr_sha > 1) {
  84                 end = lookup_commit_reference(sha1[1]);
  85                 if (!end || parse_commit(end) < 0)
  86                         die("bad ending commit object");
  87         }
  88
  89         commit_list_insert(commit, &list);
  90         if (end) {
  91                 struct commit_list *newlist = NULL;
  92                 struct commit_list **p = &newlist;
  93                 do {
  94                         struct commit *commit = pop_most_recent_commit(&list, SEEN);
  95                         struct object *obj = &commit->object;
  96
  97                         if (commit == end || (obj->flags & UNINTERESTING)) {
  98                                 mark_parents_uninteresting(commit);
  99                                 if (everybody_uninteresting(list))
 100                                         break;
 101                                 continue;
 102                         }
 103                         p = &commit_list_insert(commit, p)->next;
 104                 } while (list);
 105                 list = newlist;
 106         }
 107
 108         while (list) {
 109                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
 110
 111                 if (commit->object.flags & UNINTERESTING)
 112                         continue;
 113                 if (min_age != -1 && (commit->date > min_age))
 114                         continue;
 115                 if (max_age != -1 && (commit->date < max_age))
 116                         break;
 117                 if (max_count != -1 && !max_count--)
 118                         break;
 119                 printf("%s\n", sha1_to_hex(commit->object.sha1));
 120                 if (verbose_header)
 121                         printf("%s%c", commit->buffer, 0);
 122         }
 123         return 0;
 124 }