| #include "builtin.h" |
| #include "cache.h" |
| #include "refs.h" |
| #include "parse-options.h" |
| |
| static const char * const git_symbolic_ref_usage[] = { |
| N_("git symbolic-ref [options] name [ref]"), |
| N_("git symbolic-ref -d [-q] name"), |
| NULL |
| }; |
| |
| static int check_symref(const char *HEAD, int quiet, int shorten, int print) |
| { |
| unsigned char sha1[20]; |
| int flag; |
| const char *refname = resolve_ref_unsafe(HEAD, 0, sha1, &flag); |
| |
| if (!refname) |
| die("No such ref: %s", HEAD); |
| else if (!(flag & REF_ISSYMREF)) { |
| if (!quiet) |
| die("ref %s is not a symbolic ref", HEAD); |
| else |
| return 1; |
| } |
| if (print) { |
| if (shorten) |
| refname = shorten_unambiguous_ref(refname, 0); |
| puts(refname); |
| } |
| return 0; |
| } |
| |
| int cmd_symbolic_ref(int argc, const char **argv, const char *prefix) |
| { |
| int quiet = 0, delete = 0, shorten = 0, ret = 0; |
| const char *msg = NULL; |
| struct option options[] = { |
| OPT__QUIET(&quiet, |
| N_("suppress error message for non-symbolic (detached) refs")), |
| OPT_BOOL('d', "delete", &delete, N_("delete symbolic ref")), |
| OPT_BOOL(0, "short", &shorten, N_("shorten ref output")), |
| OPT_STRING('m', NULL, &msg, N_("reason"), N_("reason of the update")), |
| OPT_END(), |
| }; |
| |
| git_config(git_default_config, NULL); |
| argc = parse_options(argc, argv, prefix, options, |
| git_symbolic_ref_usage, 0); |
| if (msg && !*msg) |
| die("Refusing to perform update with empty message"); |
| |
| if (delete) { |
| if (argc != 1) |
| usage_with_options(git_symbolic_ref_usage, options); |
| ret = check_symref(argv[0], 1, 0, 0); |
| if (ret) |
| die("Cannot delete %s, not a symbolic ref", argv[0]); |
| return delete_ref(argv[0], NULL, REF_NODEREF); |
| } |
| |
| switch (argc) { |
| case 1: |
| ret = check_symref(argv[0], quiet, shorten, 1); |
| break; |
| case 2: |
| if (!strcmp(argv[0], "HEAD") && |
| !starts_with(argv[1], "refs/")) |
| die("Refusing to point HEAD outside of refs/"); |
| create_symref(argv[0], argv[1], msg); |
| break; |
| default: |
| usage_with_options(git_symbolic_ref_usage, options); |
| } |
| return ret; |
| } |