4 * Copyright (C) Linus Torvalds, 2005
10 static char *def
= NULL
;
11 static int no_revs
= 0;
12 static int single_rev
= 0;
13 static int revs_only
= 0;
14 static int do_rev_argument
= 1;
15 static int output_revs
= 0;
19 static int show_type
= NORMAL
;
21 static int get_extended_sha1(char *name
, unsigned char *sha1
);
24 * Some arguments are relevant "revision" arguments,
25 * others are about output format or other details.
26 * This sorts it all out.
28 static int is_rev_argument(const char *arg
)
30 static const char *rev_args
[] = {
37 const char **p
= rev_args
;
40 const char *str
= *p
++;
45 if (!strncmp(arg
, str
, len
))
50 static void show_rev(int type
, const unsigned char *sha1
)
55 printf("%s%s\n", type
== show_type
? "" : "^", sha1_to_hex(sha1
));
58 static void show_rev_arg(char *rev
)
65 static void show_norev(char *norev
)
72 static void show_arg(char *arg
)
74 if (do_rev_argument
&& is_rev_argument(arg
))
80 static int get_parent(char *name
, unsigned char *result
, int idx
)
82 unsigned char sha1
[20];
83 int ret
= get_extended_sha1(name
, sha1
);
84 struct commit
*commit
;
85 struct commit_list
*p
;
89 commit
= lookup_commit_reference(sha1
);
92 if (parse_commit(commit
))
97 memcpy(result
, p
->item
->object
.sha1
, 20);
106 * This is like "get_sha1()", except it allows "sha1 expressions",
107 * notably "xyz^" for "parent of xyz"
109 static int get_extended_sha1(char *name
, unsigned char *sha1
)
112 int len
= strlen(name
);
115 if (len
> 2 && name
[len
-1] >= '1' && name
[len
-1] <= '9') {
116 parent
= name
[len
-1] - '0';
119 if (len
> 1 && name
[len
-1] == '^') {
122 ret
= get_parent(name
, sha1
, parent
);
127 return get_sha1(name
, sha1
);
130 static void show_default(void)
135 unsigned char sha1
[20];
138 if (!get_extended_sha1(s
, sha1
)) {
139 show_rev(NORMAL
, sha1
);
146 static int show_reference(const char *refname
, const unsigned char *sha1
)
148 show_rev(NORMAL
, sha1
);
152 int main(int argc
, char **argv
)
155 unsigned char sha1
[20];
157 for (i
= 1; i
< argc
; i
++) {
166 if (!strcmp(arg
, "--")) {
172 if (!strcmp(arg
, "--default")) {
177 if (!strcmp(arg
, "--revs-only")) {
181 if (!strcmp(arg
, "--no-revs")) {
185 if (!strcmp(arg
, "--verify")) {
191 if (!strcmp(arg
, "--not")) {
192 show_type
^= REVERSED
;
195 if (!strcmp(arg
, "--all")) {
196 for_each_ref(show_reference
);
202 dotdot
= strstr(arg
, "..");
204 unsigned char end
[20];
207 if (!get_extended_sha1(arg
, sha1
)) {
210 if (!get_extended_sha1(n
, end
)) {
214 show_rev(NORMAL
, end
);
215 show_rev(REVERSED
, sha1
);
221 if (!get_extended_sha1(arg
, sha1
)) {
225 show_rev(NORMAL
, sha1
);
228 if (*arg
== '^' && !get_extended_sha1(arg
+1, sha1
)) {
232 show_rev(REVERSED
, sha1
);
239 if (single_rev
&& output_revs
!= 1) {
240 fprintf(stderr
, "Needed a single revision\n");