4 * Copyright (C) Linus Torvalds, 2005
9 static char *def = NULL;
10 static int no_revs = 0;
11 static int single_rev = 0;
12 static int revs_only = 0;
13 static int do_rev_argument = 1;
14 static int output_revs = 0;
16 static int get_extended_sha1(char *name, unsigned char *sha1);
19 * Some arguments are relevant "revision" arguments,
20 * others are about output format or other details.
21 * This sorts it all out.
23 static int is_rev_argument(const char *arg)
25 static const char *rev_args[] = {
32 const char **p = rev_args;
35 const char *str = *p++;
40 if (!strncmp(arg, str, len))
45 static void show_rev(unsigned char *sha1)
50 puts(sha1_to_hex(sha1));
53 static void show_antirev(unsigned char *sha1)
58 printf("^%s\n", sha1_to_hex(sha1));
61 static void show_rev_arg(char *rev)
68 static void show_norev(char *norev)
75 static void show_arg(char *arg)
77 if (do_rev_argument && is_rev_argument(arg))
83 static int get_parent(char *name, unsigned char *result, int idx)
85 unsigned char sha1[20];
86 int ret = get_extended_sha1(name, sha1);
87 struct commit *commit;
88 struct commit_list *p;
92 commit = lookup_commit_reference(sha1);
95 if (parse_commit(commit))
100 memcpy(result, p->item->object.sha1, 20);
109 * This is like "get_sha1()", except it allows "sha1 expressions",
110 * notably "xyz^" for "parent of xyz"
112 static int get_extended_sha1(char *name, unsigned char *sha1)
115 int len = strlen(name);
118 if (len > 2 && name[len-1] >= '1' && name[len-1] <= '9') {
119 parent = name[len-1] - '0';
122 if (len > 1 && name[len-1] == '^') {
125 ret = get_parent(name, sha1, parent);
130 return get_sha1(name, sha1);
133 static void show_default(void)
138 unsigned char sha1[20];
141 if (!get_extended_sha1(s, sha1)) {
149 int main(int argc, char **argv)
152 unsigned char sha1[20];
154 for (i = 1; i < argc; i++) {
163 if (!strcmp(arg, "--")) {
169 if (!strcmp(arg, "--default")) {
174 if (!strcmp(arg, "--revs-only")) {
178 if (!strcmp(arg, "--no-revs")) {
182 if (!strcmp(arg, "--verify")) {
191 dotdot = strstr(arg, "..");
193 unsigned char end[20];
196 if (!get_extended_sha1(arg, sha1)) {
199 if (!get_extended_sha1(n, end)) {
210 if (!get_extended_sha1(arg, sha1)) {
217 if (*arg == '^' && !get_extended_sha1(arg+1, sha1)) {
228 if (single_rev && output_revs != 1) {
229 fprintf(stderr, "Needed a single revision\n");