79 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			C
		
	
	
			
		
		
	
	
			79 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			C
		
	
	
| #include "builtin.h"
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| #include "config.h"
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| #include "cache.h"
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| #include "refs.h"
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| #include "parse-options.h"
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| 
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| static const char * const git_symbolic_ref_usage[] = {
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| 	N_("git symbolic-ref [<options>] <name> [<ref>]"),
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| 	N_("git symbolic-ref -d [-q] <name>"),
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| 	NULL
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| };
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| 
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| static int check_symref(const char *HEAD, int quiet, int shorten, int print)
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| {
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| 	int flag;
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| 	const char *refname = resolve_ref_unsafe(HEAD, 0, NULL, &flag);
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| 
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| 	if (!refname)
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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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| 			return 1;
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| 	}
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| 	if (print) {
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| 		if (shorten)
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| 			refname = shorten_unambiguous_ref(refname, 0);
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| 		puts(refname);
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| 	}
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| 	return 0;
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| }
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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, delete = 0, shorten = 0, ret = 0;
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| 	const char *msg = NULL;
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| 	struct option options[] = {
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| 		OPT__QUIET(&quiet,
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| 			N_("suppress error message for non-symbolic (detached) refs")),
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| 		OPT_BOOL('d', "delete", &delete, N_("delete symbolic ref")),
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| 		OPT_BOOL(0, "short", &shorten, N_("shorten ref output")),
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| 		OPT_STRING('m', NULL, &msg, N_("reason"), N_("reason of the update")),
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| 		OPT_END(),
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| 	};
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| 
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| 	git_config(git_default_config, NULL);
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| 	argc = parse_options(argc, argv, prefix, options,
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| 			     git_symbolic_ref_usage, 0);
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| 	if (msg && !*msg)
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| 		die("Refusing to perform update with empty message");
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| 
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| 	if (delete) {
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| 		if (argc != 1)
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| 			usage_with_options(git_symbolic_ref_usage, options);
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| 		ret = check_symref(argv[0], 1, 0, 0);
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| 		if (ret)
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| 			die("Cannot delete %s, not a symbolic ref", argv[0]);
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| 		if (!strcmp(argv[0], "HEAD"))
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| 			die("deleting '%s' is not allowed", argv[0]);
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| 		return delete_ref(NULL, argv[0], NULL, REF_NO_DEREF);
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| 	}
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| 
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| 	switch (argc) {
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| 	case 1:
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| 		ret = check_symref(argv[0], quiet, shorten, 1);
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| 		break;
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| 	case 2:
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| 		if (!strcmp(argv[0], "HEAD") &&
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| 		    !starts_with(argv[1], "refs/"))
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| 			die("Refusing to point HEAD outside of refs/");
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| 		ret = !!create_symref(argv[0], argv[1], msg);
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| 		break;
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| 	default:
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| 		usage_with_options(git_symbolic_ref_usage, options);
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| 	}
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| 	return ret;
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| }
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