- argv[1] = disambiguate_ref(tip);
-
- if (grep && pattern && (!strcmp(grep, "grep") ||
- !strcmp(grep, "author") ||
- !strcmp(grep, "committer")))
- argv[argc++] = fmt("--%s=%s", grep, pattern);
+ if (grep && pattern && *pattern) {
+ pattern = xstrdup(pattern);
+ if (!strcmp(grep, "grep") || !strcmp(grep, "author") ||
+ !strcmp(grep, "committer")) {
+ arg = fmt("--%s=%s", grep, pattern);
+ vector_push(&vec, &arg, 0);
+ }
+ if (!strcmp(grep, "range")) {
+ /* Split the pattern at whitespace and add each token
+ * as a revision expression. Do not accept other
+ * rev-list options. Also, replace the previously
+ * pushed tip (it's no longer relevant).
+ */
+ vec.count--;
+ while ((arg = next_token(&pattern))) {
+ if (*arg == '-') {
+ fprintf(stderr, "Bad range expr: %s\n",
+ arg);
+ break;
+ }
+ vector_push(&vec, &arg, 0);
+ }
+ }
+ }