Andrew's git - gitweb.git/blob

0900737f40c5d079140f3e3d2835b8d884753a06
   1#include "cache.h"
   2#include "refs.h"
   3#include "tag.h"
   4#include "commit.h"
   5#include "tree.h"
   6#include "blob.h"
   7#include "tree-walk.h"
   8#include "diff.h"
   9#include "revision.h"
  10#include "list-objects.h"
  11#include "builtin.h"
  12
  13/* bits #0-15 in revision.h */
  14
  15#define COUNTED         (1u<<16)
  16
  17static const char rev_list_usage[] =
  18"git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
  19"  limiting output:\n"
  20"    --max-count=nr\n"
  21"    --max-age=epoch\n"
  22"    --min-age=epoch\n"
  23"    --sparse\n"
  24"    --no-merges\n"
  25"    --remove-empty\n"
  26"    --all\n"
  27"    --stdin\n"
  28"  ordering output:\n"
  29"    --topo-order\n"
  30"    --date-order\n"
  31"  formatting output:\n"
  32"    --parents\n"
  33"    --objects | --objects-edge\n"
  34"    --unpacked\n"
  35"    --header | --pretty\n"
  36"    --abbrev=nr | --no-abbrev\n"
  37"    --abbrev-commit\n"
  38"  special purpose:\n"
  39"    --bisect"
  40;
  41
  42static struct rev_info revs;
  43
  44static int bisect_list;
  45static int show_timestamp;
  46static int hdr_termination;
  47static const char *header_prefix;
  48
  49static void show_commit(struct commit *commit)
  50{
  51        if (show_timestamp)
  52                printf("%lu ", commit->date);
  53        if (header_prefix)
  54                fputs(header_prefix, stdout);
  55        if (commit->object.flags & BOUNDARY)
  56                putchar('-');
  57        if (revs.abbrev_commit && revs.abbrev)
  58                fputs(find_unique_abbrev(commit->object.sha1, revs.abbrev),
  59                      stdout);
  60        else
  61                fputs(sha1_to_hex(commit->object.sha1), stdout);
  62        if (revs.parents) {
  63                struct commit_list *parents = commit->parents;
  64                while (parents) {
  65                        struct object *o = &(parents->item->object);
  66                        parents = parents->next;
  67                        if (o->flags & TMP_MARK)
  68                                continue;
  69                        printf(" %s", sha1_to_hex(o->sha1));
  70                        o->flags |= TMP_MARK;
  71                }
  72                /* TMP_MARK is a general purpose flag that can
  73                 * be used locally, but the user should clean
  74                 * things up after it is done with them.
  75                 */
  76                for (parents = commit->parents;
  77                     parents;
  78                     parents = parents->next)
  79                        parents->item->object.flags &= ~TMP_MARK;
  80        }
  81        if (revs.commit_format == CMIT_FMT_ONELINE)
  82                putchar(' ');
  83        else
  84                putchar('\n');
  85
  86        if (revs.verbose_header) {
  87                static char pretty_header[16384];
  88                pretty_print_commit(revs.commit_format, commit, ~0,
  89                                    pretty_header, sizeof(pretty_header),
  90                                    revs.abbrev, NULL, NULL, revs.relative_date);
  91                printf("%s%c", pretty_header, hdr_termination);
  92        }
  93        fflush(stdout);
  94        if (commit->parents) {
  95                free_commit_list(commit->parents);
  96                commit->parents = NULL;
  97        }
  98        free(commit->buffer);
  99        commit->buffer = NULL;
 100}
 101
 102static void show_object(struct object_array_entry *p)
 103{
 104        /* An object with name "foo\n0000000..." can be used to
 105         * confuse downstream git-pack-objects very badly.
 106         */
 107        const char *ep = strchr(p->name, '\n');
 108        if (ep) {
 109                printf("%s %.*s\n", sha1_to_hex(p->item->sha1),
 110                       (int) (ep - p->name),
 111                       p->name);
 112        }
 113        else
 114                printf("%s %s\n", sha1_to_hex(p->item->sha1), p->name);
 115}
 116
 117/*
 118 * This is a truly stupid algorithm, but it's only
 119 * used for bisection, and we just don't care enough.
 120 *
 121 * We care just barely enough to avoid recursing for
 122 * non-merge entries.
 123 */
 124static int count_distance(struct commit_list *entry)
 125{
 126        int nr = 0;
 127
 128        while (entry) {
 129                struct commit *commit = entry->item;
 130                struct commit_list *p;
 131
 132                if (commit->object.flags & (UNINTERESTING | COUNTED))
 133                        break;
 134                if (!revs.prune_fn || (commit->object.flags & TREECHANGE))
 135                        nr++;
 136                commit->object.flags |= COUNTED;
 137                p = commit->parents;
 138                entry = p;
 139                if (p) {
 140                        p = p->next;
 141                        while (p) {
 142                                nr += count_distance(p);
 143                                p = p->next;
 144                        }
 145                }
 146        }
 147
 148        return nr;
 149}
 150
 151static void clear_distance(struct commit_list *list)
 152{
 153        while (list) {
 154                struct commit *commit = list->item;
 155                commit->object.flags &= ~COUNTED;
 156                list = list->next;
 157        }
 158}
 159
 160static struct commit_list *find_bisection(struct commit_list *list)
 161{
 162        int nr, closest;
 163        struct commit_list *p, *best;
 164
 165        nr = 0;
 166        p = list;
 167        while (p) {
 168                if (!revs.prune_fn || (p->item->object.flags & TREECHANGE))
 169                        nr++;
 170                p = p->next;
 171        }
 172        closest = 0;
 173        best = list;
 174
 175        for (p = list; p; p = p->next) {
 176                int distance;
 177
 178                if (revs.prune_fn && !(p->item->object.flags & TREECHANGE))
 179                        continue;
 180
 181                distance = count_distance(p);
 182                clear_distance(list);
 183                if (nr - distance < distance)
 184                        distance = nr - distance;
 185                if (distance > closest) {
 186                        best = p;
 187                        closest = distance;
 188                }
 189        }
 190        if (best)
 191                best->next = NULL;
 192        return best;
 193}
 194
 195static void mark_edge_parents_uninteresting(struct commit *commit)
 196{
 197        struct commit_list *parents;
 198
 199        for (parents = commit->parents; parents; parents = parents->next) {
 200                struct commit *parent = parents->item;
 201                if (!(parent->object.flags & UNINTERESTING))
 202                        continue;
 203                mark_tree_uninteresting(parent->tree);
 204                if (revs.edge_hint && !(parent->object.flags & SHOWN)) {
 205                        parent->object.flags |= SHOWN;
 206                        printf("-%s\n", sha1_to_hex(parent->object.sha1));
 207                }
 208        }
 209}
 210
 211static void mark_edges_uninteresting(struct commit_list *list)
 212{
 213        for ( ; list; list = list->next) {
 214                struct commit *commit = list->item;
 215
 216                if (commit->object.flags & UNINTERESTING) {
 217                        mark_tree_uninteresting(commit->tree);
 218                        continue;
 219                }
 220                mark_edge_parents_uninteresting(commit);
 221        }
 222}
 223
 224static void read_revisions_from_stdin(struct rev_info *revs)
 225{
 226        char line[1000];
 227
 228        while (fgets(line, sizeof(line), stdin) != NULL) {
 229                int len = strlen(line);
 230                if (line[len - 1] == '\n')
 231                        line[--len] = 0;
 232                if (!len)
 233                        break;
 234                if (line[0] == '-')
 235                        die("options not supported in --stdin mode");
 236                if (handle_revision_arg(line, revs, 0, 1))
 237                        die("bad revision '%s'", line);
 238        }
 239}
 240
 241int cmd_rev_list(int argc, const char **argv, const char *prefix)
 242{
 243        struct commit_list *list;
 244        int i;
 245        int read_from_stdin = 0;
 246
 247        init_revisions(&revs, prefix);
 248        revs.abbrev = 0;
 249        revs.commit_format = CMIT_FMT_UNSPECIFIED;
 250        argc = setup_revisions(argc, argv, &revs, NULL);
 251
 252        for (i = 1 ; i < argc; i++) {
 253                const char *arg = argv[i];
 254
 255                if (!strcmp(arg, "--header")) {
 256                        revs.verbose_header = 1;
 257                        continue;
 258                }
 259                if (!strcmp(arg, "--timestamp")) {
 260                        show_timestamp = 1;
 261                        continue;
 262                }
 263                if (!strcmp(arg, "--bisect")) {
 264                        bisect_list = 1;
 265                        continue;
 266                }
 267                if (!strcmp(arg, "--stdin")) {
 268                        if (read_from_stdin++)
 269                                die("--stdin given twice?");
 270                        read_revisions_from_stdin(&revs);
 271                        continue;
 272                }
 273                usage(rev_list_usage);
 274
 275        }
 276        if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 277                /* The command line has a --pretty  */
 278                hdr_termination = '\n';
 279                if (revs.commit_format == CMIT_FMT_ONELINE)
 280                        header_prefix = "";
 281                else
 282                        header_prefix = "commit ";
 283        }
 284        else if (revs.verbose_header)
 285                /* Only --header was specified */
 286                revs.commit_format = CMIT_FMT_RAW;
 287
 288        list = revs.commits;
 289
 290        if ((!list &&
 291             (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
 292              !revs.pending.nr)) ||
 293            revs.diff)
 294                usage(rev_list_usage);
 295
 296        save_commit_buffer = revs.verbose_header;
 297        track_object_refs = 0;
 298        if (bisect_list)
 299                revs.limited = 1;
 300
 301        prepare_revision_walk(&revs);
 302        if (revs.tree_objects)
 303                mark_edges_uninteresting(revs.commits);
 304
 305        if (bisect_list)
 306                revs.commits = find_bisection(revs.commits);
 307
 308        traverse_commit_list(&revs, show_commit, show_object);
 309
 310        return 0;
 311}