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git/builtin-symbolic-ref.c
Junio C Hamano a0f4280f9e Fix git-fetch while on detached HEAD not to give needlessly alarming errors
When we are on a detached HEAD, there is no current branch.
There is no reason to leak the error messages to the end user
since this is a situation we expect to see.

This adds -q option to git-symbolic-ref to exit without issuing
an error message if the given name is not a symbolic ref.

By the way, with or without this patch, there currently is no
good way to tell failure modes between "git symbolic-ref HAED"
and "git symbolic-ref HEAD".  Both says "is not a symbolic ref".

We may want to do something about it.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-01-15 15:35:07 -08:00

59 lines
1 KiB
C

#include "builtin.h"
#include "cache.h"
#include "refs.h"
static const char git_symbolic_ref_usage[] =
"git-symbolic-ref [-q] name [ref]";
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;
git_config(git_default_config);
while (1 < argc) {
const char *arg = argv[1];
if (arg[0] != '-')
break;
else if (!strcmp("-q", arg))
quiet = 1;
else if (!strcmp("--", arg)) {
argc--;
argv++;
break;
}
else
die("unknown option %s", arg);
argc--;
argv++;
}
switch (argc) {
case 2:
check_symref(argv[1], quiet);
break;
case 3:
create_symref(argv[1], argv[2]);
break;
default:
usage(git_symbolic_ref_usage);
}
return 0;
}