+static int cmd_log(int argc, const char **argv, char **envp)
+{
+ struct rev_info rev;
+ struct commit *commit;
+ char *buf = xmalloc(LOGSIZE);
+ static enum cmit_fmt commit_format = CMIT_FMT_DEFAULT;
+ int abbrev = DEFAULT_ABBREV;
+ const char *commit_prefix = "commit ";
+
+ argc = setup_revisions(argc, argv, &rev, "HEAD");
+ while (1 < argc) {
+ const char *arg = argv[1];
+ if (!strncmp(arg, "--pretty", 8)) {
+ commit_format = get_commit_format(arg + 8);
+ if (commit_format == CMIT_FMT_ONELINE)
+ commit_prefix = "";
+ }
+ else if (!strcmp(arg, "--no-abbrev")) {
+ abbrev = 0;
+ }
+ else if (!strncmp(arg, "--abbrev=", 9)) {
+ abbrev = strtoul(arg + 9, NULL, 10);
+ if (abbrev && abbrev < MINIMUM_ABBREV)
+ abbrev = MINIMUM_ABBREV;
+ else if (40 < abbrev)
+ abbrev = 40;
+ }
+ else
+ die("unrecognized argument: %s", arg);
+ argc--; argv++;
+ }
+
+ prepare_revision_walk(&rev);
+ setup_pager();
+ while ((commit = get_revision(&rev)) != NULL) {
+ printf("%s%s", commit_prefix,
+ sha1_to_hex(commit->object.sha1));
+ if (rev.parents) {
+ struct commit_list *parents = commit->parents;
+ while (parents) {
+ struct object *o = &(parents->item->object);
+ parents = parents->next;
+ if (o->flags & TMP_MARK)
+ continue;
+ printf(" %s", sha1_to_hex(o->sha1));
+ o->flags |= TMP_MARK;
+ }
+ /* TMP_MARK is a general purpose flag that can
+ * be used locally, but the user should clean
+ * things up after it is done with them.
+ */
+ for (parents = commit->parents;
+ parents;
+ parents = parents->next)
+ parents->item->object.flags &= ~TMP_MARK;
+ }
+ if (commit_format == CMIT_FMT_ONELINE)
+ putchar(' ');
+ else
+ putchar('\n');
+ pretty_print_commit(commit_format, commit, ~0, buf,
+ LOGSIZE, abbrev);
+ printf("%s\n", buf);
+ }
+ free(buf);
+ return 0;
+}
+
+static void handle_internal_command(int argc, const char **argv, char **envp)