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git/builtin-symbolic-ref.c
Jeff King e9cc02f0e4 symbolic-ref: allow refs/<whatever> in HEAD
Commit afe5d3d5 introduced a safety valve to symbolic-ref to
disallow installing an invalid HEAD. It was accompanied by
b229d18a, which changed validate_headref to require that
HEAD contain a pointer to refs/heads/ instead of just refs/.
Therefore, the safety valve also checked for refs/heads/.

As it turns out, topgit is using refs/top-bases/ in HEAD,
leading us to re-loosen (at least temporarily) the
validate_headref check made in b229d18a. This patch does the
corresponding loosening for the symbolic-ref safety valve,
so that the two are in agreement once more.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-02-13 18:20:44 -08:00

56 lines
1.3 KiB
C

#include "builtin.h"
#include "cache.h"
#include "refs.h"
#include "parse-options.h"
static const char * const git_symbolic_ref_usage[] = {
"git symbolic-ref [options] name [ref]",
NULL
};
static void check_symref(const char *HEAD, int quiet)
{
unsigned char sha1[20];
int flag;
const char *refs_heads_master = resolve_ref(HEAD, sha1, 0, &flag);
if (!refs_heads_master)
die("No such ref: %s", HEAD);
else if (!(flag & REF_ISSYMREF)) {
if (!quiet)
die("ref %s is not a symbolic ref", HEAD);
else
exit(1);
}
puts(refs_heads_master);
}
int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
{
int quiet = 0;
const char *msg = NULL;
struct option options[] = {
OPT__QUIET(&quiet),
OPT_STRING('m', NULL, &msg, "reason", "reason of the update"),
OPT_END(),
};
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, options, git_symbolic_ref_usage, 0);
if (msg &&!*msg)
die("Refusing to perform update with empty message");
switch (argc) {
case 1:
check_symref(argv[0], quiet);
break;
case 2:
if (!strcmp(argv[0], "HEAD") &&
prefixcmp(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 0;
}