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\n"
  14                       "  --pretty";
  15
  16 static int verbose_header = 0;
  17 static int show_parents = 0;
  18 static int hdr_termination = 0;
  19 static const char *prefix = "";
  20 static unsigned long max_age = -1;
  21 static unsigned long min_age = -1;
  22 static int max_count = -1;
  23 static enum cmit_fmt commit_format = CMIT_FMT_RAW;
  24
  25 static void show_commit(struct commit *commit)
  26 {
  27         printf("%s%s", prefix, sha1_to_hex(commit->object.sha1));
  28         if (show_parents) {
  29                 struct commit_list *parents = commit->parents;
  30                 while (parents) {
  31                         printf(" %s", sha1_to_hex(parents->item->object.sha1));
  32                         parents = parents->next;
  33                 }
  34         }
  35         putchar('\n');
  36         if (verbose_header) {
  37                 static char pretty_header[16384];
  38                 pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
  39                 printf("%s%c", pretty_header, hdr_termination);
  40         }
  41 }
  42
  43 static void show_commit_list(struct commit_list *list)
  44 {
  45         while (list) {
  46                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
  47
  48                 if (commit->object.flags & UNINTERESTING)
  49                         continue;
  50                 if (min_age != -1 && (commit->date > min_age))
  51                         continue;
  52                 if (max_age != -1 && (commit->date < max_age))
  53                         break;
  54                 if (max_count != -1 && !max_count--)
  55                         break;
  56                 show_commit(commit);
  57         }
  58 }
  59
  60 static void mark_parents_uninteresting(struct commit *commit)
  61 {
  62         struct commit_list *parents = commit->parents;
  63
  64         while (parents) {
  65                 struct commit *commit = parents->item;
  66                 commit->object.flags |= UNINTERESTING;
  67                 parents = parents->next;
  68         }
  69 }
  70
  71 static int everybody_uninteresting(struct commit_list *list)
  72 {
  73         while (list) {
  74                 struct commit *commit = list->item;
  75                 list = list->next;
  76                 if (commit->object.flags & UNINTERESTING)
  77                         continue;
  78                 return 0;
  79         }
  80         return 1;
  81 }
  82
  83 struct commit_list *limit_list(struct commit_list *list)
  84 {
  85         struct commit_list *newlist = NULL;
  86         struct commit_list **p = &newlist;
  87         do {
  88                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
  89                 struct object *obj = &commit->object;
  90
  91                 if (obj->flags & UNINTERESTING) {
  92                         mark_parents_uninteresting(commit);
  93                         if (everybody_uninteresting(list))
  94                                 break;
  95                         continue;
  96                 }
  97                 p = &commit_list_insert(commit, p)->next;
  98         } while (list);
  99         return newlist;
 100 }
 101
 102 static enum cmit_fmt get_commit_format(const char *arg)
 103 {
 104         if (!*arg)
 105                 return CMIT_FMT_DEFAULT;
 106         if (!strcmp(arg, "=raw"))
 107                 return CMIT_FMT_RAW;
 108         if (!strcmp(arg, "=medium"))
 109                 return CMIT_FMT_MEDIUM;
 110         if (!strcmp(arg, "=short"))
 111                 return CMIT_FMT_SHORT;
 112         usage(rev_list_usage);
 113 }
 114
 115
 116 int main(int argc, char **argv)
 117 {
 118         struct commit_list *list = NULL;
 119         int i, limited = 0;
 120
 121         for (i = 1 ; i < argc; i++) {
 122                 int flags;
 123                 char *arg = argv[i];
 124                 unsigned char sha1[20];
 125                 struct commit *commit;
 126
 127                 if (!strncmp(arg, "--max-count=", 12)) {
 128                         max_count = atoi(arg + 12);
 129                         continue;
 130                 }
 131                 if (!strncmp(arg, "--max-age=", 10)) {
 132                         max_age = atoi(arg + 10);
 133                         continue;
 134                 }
 135                 if (!strncmp(arg, "--min-age=", 10)) {
 136                         min_age = atoi(arg + 10);
 137                         continue;
 138                 }
 139                 if (!strcmp(arg, "--header")) {
 140                         verbose_header = 1;
 141                         continue;
 142                 }
 143                 if (!strncmp(arg, "--pretty", 8)) {
 144                         commit_format = get_commit_format(arg+8);
 145                         verbose_header = 1;
 146                         hdr_termination = '\n';
 147                         prefix = "commit ";
 148                         continue;
 149                 }
 150                 if (!strcmp(arg, "--parents")) {
 151                         show_parents = 1;
 152                         continue;
 153                 }
 154
 155                 flags = 0;
 156                 if (*arg == '^') {
 157                         flags = UNINTERESTING;
 158                         arg++;
 159                         limited = 1;
 160                 }
 161                 if (get_sha1(arg, sha1))
 162                         usage(rev_list_usage);
 163                 commit = lookup_commit_reference(sha1);
 164                 if (!commit || parse_commit(commit) < 0)
 165                         die("bad commit object %s", arg);
 166                 commit->object.flags |= flags;
 167                 commit_list_insert(commit, &list);
 168         }
 169
 170         if (!list)
 171                 usage(rev_list_usage);
 172
 173         if (limited)
 174                 list = limit_list(list);
 175
 176         show_commit_list(list);
 177         return 0;
 178 }