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path: move validate_headref() to its only user

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While `validate_headref()` is only called from `is_git_directory()` in
"setup.c", it is currently implemented in "path.c". Move it over such
that it becomes clear that it is only really used during setup in order
to discover repositories.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2024-05-07 06:52:51 +02:00
committed by Junio C Hamano
parent a0851cece5
commit 0c6bd2b81d
3 changed files with 53 additions and 54 deletions
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53
path.c
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@ -5,7 +5,6 @@
#include "abspath.h"
#include "environment.h"
#include "gettext.h"
#include "hex.h"
#include "repository.h"
#include "strbuf.h"
#include "string-list.h"
@ -647,58 +646,6 @@ void strbuf_git_common_path(struct strbuf *sb,
va_end(args);
}
int validate_headref(const char *path)
{
struct stat st;
char buffer[256];
const char *refname;
struct object_id oid;
int fd;
ssize_t len;
if (lstat(path, &st) < 0)
return -1;
/* Make sure it is a "refs/.." symlink */
if (S_ISLNK(st.st_mode)) {
len = readlink(path, buffer, sizeof(buffer)-1);
if (len >= 5 && !memcmp("refs/", buffer, 5))
return 0;
return -1;
}
/*
* Anything else, just open it and try to see if it is a symbolic ref.
*/
fd = open(path, O_RDONLY);
if (fd < 0)
return -1;
len = read_in_full(fd, buffer, sizeof(buffer)-1);
close(fd);
if (len < 0)
return -1;
buffer[len] = '\0';
/*
* Is it a symbolic ref?
*/
if (skip_prefix(buffer, "ref:", &refname)) {
while (isspace(*refname))
refname++;
if (starts_with(refname, "refs/"))
return 0;
}
/*
* Is this a detached HEAD?
*/
if (get_oid_hex_any(buffer, &oid) != GIT_HASH_UNKNOWN)
return 0;
return -1;
}
static struct passwd *getpw_str(const char *username, size_t len)
{
struct passwd *pw;