Andrew's git / gitweb.git / rev-list.c
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rev-list.con commit git-rev-list: factor out the commit printing from "main()" (81f2bb1)
   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
   8static 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
  16static int verbose_header = 0;
  17static int show_parents = 0;
  18static int pretty_print = 0;
  19static int hdr_termination = 0;
  20static const char *prefix = "";
  21static unsigned long max_age = -1;
  22static unsigned long min_age = -1;
  23static int max_count = -1;
  24
  25static 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
  47static 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
  64static 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
  75static 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
  87int main(int argc, char **argv)
  88{
  89        int nr_sha;
  90        unsigned char sha1[2][20];
  91        struct commit_list *list = NULL;
  92        struct commit *commit, *end;
  93        int i;
  94
  95        nr_sha = 0;
  96        for (i = 1 ; i < argc; i++) {
  97                char *arg = argv[i];
  98
  99                if (!strncmp(arg, "--max-count=", 12)) {
 100                        max_count = atoi(arg + 12);
 101                        continue;
 102                }
 103                if (!strncmp(arg, "--max-age=", 10)) {
 104                        max_age = atoi(arg + 10);
 105                        continue;
 106                }
 107                if (!strncmp(arg, "--min-age=", 10)) {
 108                        min_age = atoi(arg + 10);
 109                        continue;
 110                }
 111                if (!strcmp(arg, "--header")) {
 112                        verbose_header = 1;
 113                        continue;
 114                }
 115                if (!strcmp(arg, "--pretty")) {
 116                        verbose_header = 1;
 117                        pretty_print = 1;
 118                        hdr_termination = '\n';
 119                        prefix = "commit ";
 120                        continue;
 121                }
 122                if (!strcmp(arg, "--parents")) {
 123                        show_parents = 1;
 124                        continue;
 125                }
 126
 127                if (nr_sha > 2 || get_sha1(arg, sha1[nr_sha]))
 128                        usage(rev_list_usage);
 129                nr_sha++;
 130        }
 131
 132        if (!nr_sha)
 133                usage(rev_list_usage);
 134
 135        commit = lookup_commit_reference(sha1[0]);
 136        if (!commit || parse_commit(commit) < 0)
 137                die("bad starting commit object");
 138
 139        end = NULL;
 140        if (nr_sha > 1) {
 141                end = lookup_commit_reference(sha1[1]);
 142                if (!end || parse_commit(end) < 0)
 143                        die("bad ending commit object");
 144        }
 145
 146        commit_list_insert(commit, &list);
 147        if (end) {
 148                struct commit_list *newlist = NULL;
 149                struct commit_list **p = &newlist;
 150                do {
 151                        struct commit *commit = pop_most_recent_commit(&list, SEEN);
 152                        struct object *obj = &commit->object;
 153
 154                        if (commit == end || (obj->flags & UNINTERESTING)) {
 155                                mark_parents_uninteresting(commit);
 156                                if (everybody_uninteresting(list))
 157                                        break;
 158                                continue;
 159                        }
 160                        p = &commit_list_insert(commit, p)->next;
 161                } while (list);
 162                list = newlist;
 163        }
 164
 165        show_commit_list(list);
 166        return 0;
 167}