Merge branch 'maint-1.7.3' into maint
[git/git.git] / builtin / check-ref-format.c
1 /*
2 * GIT - The information manager from hell
3 */
4
5 #include "cache.h"
6 #include "refs.h"
7 #include "builtin.h"
8 #include "strbuf.h"
9
10 static const char builtin_check_ref_format_usage[] =
11 "git check-ref-format [--print] <refname>\n"
12 " or: git check-ref-format --branch <branchname-shorthand>";
13
14 /*
15 * Remove leading slashes and replace each run of adjacent slashes in
16 * src with a single slash, and write the result to dst.
17 *
18 * This function is similar to normalize_path_copy(), but stripped down
19 * to meet check_ref_format's simpler needs.
20 */
21 static void collapse_slashes(char *dst, const char *src)
22 {
23 char ch;
24 char prev = '/';
25
26 while ((ch = *src++) != '\0') {
27 if (prev == '/' && ch == prev)
28 continue;
29
30 *dst++ = ch;
31 prev = ch;
32 }
33 *dst = '\0';
34 }
35
36 static int check_ref_format_branch(const char *arg)
37 {
38 struct strbuf sb = STRBUF_INIT;
39 int nongit;
40
41 setup_git_directory_gently(&nongit);
42 if (strbuf_check_branch_ref(&sb, arg))
43 die("'%s' is not a valid branch name", arg);
44 printf("%s\n", sb.buf + 11);
45 return 0;
46 }
47
48 static int check_ref_format_print(const char *arg)
49 {
50 char *refname = xmalloc(strlen(arg) + 1);
51
52 if (check_ref_format(arg))
53 return 1;
54 collapse_slashes(refname, arg);
55 printf("%s\n", refname);
56 return 0;
57 }
58
59 int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
60 {
61 if (argc == 2 && !strcmp(argv[1], "-h"))
62 usage(builtin_check_ref_format_usage);
63
64 if (argc == 3 && !strcmp(argv[1], "--branch"))
65 return check_ref_format_branch(argv[2]);
66 if (argc == 3 && !strcmp(argv[1], "--print"))
67 return check_ref_format_print(argv[2]);
68 if (argc != 2)
69 usage(builtin_check_ref_format_usage);
70 return !!check_ref_format(argv[1]);
71 }