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 pretty_print = 0;
  19 static int hdr_termination = 0;
  20 static const char *prefix = "";
  21 static unsigned long max_age = -1;
  22 static unsigned long min_age = -1;
  23 static int max_count = -1;
  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                 const char *buf = commit->buffer;
  38                 if (pretty_print) {
  39                         static char pretty_header[16384];
  40                         pretty_print_commit(commit->buffer, ~0, pretty_header, sizeof(pretty_header));
  41                         buf = pretty_header;
  42                 }
  43                 printf("%s%c", buf, hdr_termination);
  44         }
  45 }
  46
  47 static void show_commit_list(struct commit_list *list)
  48 {
  49         while (list) {
  50                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
  51
  52                 if (commit->object.flags & UNINTERESTING)
  53                         continue;
  54                 if (min_age != -1 && (commit->date > min_age))
  55                         continue;
  56                 if (max_age != -1 && (commit->date < max_age))
  57                         break;
  58                 if (max_count != -1 && !max_count--)
  59                         break;
  60                 show_commit(commit);
  61         }
  62 }
  63
  64 static void mark_parents_uninteresting(struct commit *commit)
  65 {
  66         struct commit_list *parents = commit->parents;
  67
  68         while (parents) {
  69                 struct commit *commit = parents->item;
  70                 commit->object.flags |= UNINTERESTING;
  71                 parents = parents->next;
  72         }
  73 }
  74
  75 static int everybody_uninteresting(struct commit_list *list)
  76 {
  77         while (list) {
  78                 struct commit *commit = list->item;
  79                 list = list->next;
  80                 if (commit->object.flags & UNINTERESTING)
  81                         continue;
  82                 return 0;
  83         }
  84         return 1;
  85 }
  86
  87 struct commit_list *limit_list(struct commit_list *list, struct commit *end)
  88 {
  89         struct commit_list *newlist = NULL;
  90         struct commit_list **p = &newlist;
  91         do {
  92                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
  93                 struct object *obj = &commit->object;
  94
  95                 if (commit == end || (obj->flags & UNINTERESTING)) {
  96                         mark_parents_uninteresting(commit);
  97                         if (everybody_uninteresting(list))
  98                                 break;
  99                         continue;
 100                 }
 101                 p = &commit_list_insert(commit, p)->next;
 102         } while (list);
 103         return newlist;
 104 }
 105
 106 int main(int argc, char **argv)
 107 {
 108         int nr_sha;
 109         unsigned char sha1[2][20];
 110         struct commit_list *list = NULL;
 111         struct commit *commit, *end;
 112         int i;
 113
 114         nr_sha = 0;
 115         for (i = 1 ; i < argc; i++) {
 116                 char *arg = argv[i];
 117
 118                 if (!strncmp(arg, "--max-count=", 12)) {
 119                         max_count = atoi(arg + 12);
 120                         continue;
 121                 }
 122                 if (!strncmp(arg, "--max-age=", 10)) {
 123                         max_age = atoi(arg + 10);
 124                         continue;
 125                 }
 126                 if (!strncmp(arg, "--min-age=", 10)) {
 127                         min_age = atoi(arg + 10);
 128                         continue;
 129                 }
 130                 if (!strcmp(arg, "--header")) {
 131                         verbose_header = 1;
 132                         continue;
 133                 }
 134                 if (!strcmp(arg, "--pretty")) {
 135                         verbose_header = 1;
 136                         pretty_print = 1;
 137                         hdr_termination = '\n';
 138                         prefix = "commit ";
 139                         continue;
 140                 }
 141                 if (!strcmp(arg, "--parents")) {
 142                         show_parents = 1;
 143                         continue;
 144                 }
 145
 146                 if (nr_sha > 2 || get_sha1(arg, sha1[nr_sha]))
 147                         usage(rev_list_usage);
 148                 nr_sha++;
 149         }
 150
 151         if (!nr_sha)
 152                 usage(rev_list_usage);
 153
 154         commit = lookup_commit_reference(sha1[0]);
 155         if (!commit || parse_commit(commit) < 0)
 156                 die("bad starting commit object");
 157
 158         end = NULL;
 159         if (nr_sha > 1) {
 160                 end = lookup_commit_reference(sha1[1]);
 161                 if (!end || parse_commit(end) < 0)
 162                         die("bad ending commit object");
 163         }
 164
 165         commit_list_insert(commit, &list);
 166         if (end)
 167                 list = limit_list(list, end);
 168
 169         show_commit_list(list);
 170         return 0;
 171 }