72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "refs.h"
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static const char git_symbolic_ref_usage[] =
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"git-symbolic-ref [-q] [-m <reason>] name [ref]";
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static void check_symref(const char *HEAD, int quiet)
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{
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unsigned char sha1[20];
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int flag;
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const char *refs_heads_master = resolve_ref(HEAD, sha1, 0, &flag);
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if (!refs_heads_master)
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die("No such ref: %s", HEAD);
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else if (!(flag & REF_ISSYMREF)) {
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if (!quiet)
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die("ref %s is not a symbolic ref", HEAD);
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else
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exit(1);
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}
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puts(refs_heads_master);
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}
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int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
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{
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int quiet = 0;
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const char *msg = NULL;
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git_config(git_default_config);
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while (1 < argc) {
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const char *arg = argv[1];
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if (arg[0] != '-')
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break;
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else if (!strcmp("-q", arg))
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quiet = 1;
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else if (!strcmp("-m", arg)) {
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argc--;
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argv++;
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if (argc <= 1)
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break;
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msg = argv[1];
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if (!*msg)
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die("Refusing to perform update with empty message");
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if (strchr(msg, '\n'))
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die("Refusing to perform update with \\n in message");
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}
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else if (!strcmp("--", arg)) {
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argc--;
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argv++;
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break;
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}
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else
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die("unknown option %s", arg);
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argc--;
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argv++;
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}
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switch (argc) {
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case 2:
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check_symref(argv[1], quiet);
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break;
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case 3:
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create_symref(argv[1], argv[2], msg);
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break;
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default:
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usage(git_symbolic_ref_usage);
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}
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return 0;
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}
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