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Fix up "for_each_ref()" to be more usable, and use it in git-fsck-cache

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It needed to take the GIT_DIR information into account, something that
the original receive-pack usage just never cared about.
This commit is contained in:
Linus Torvalds
2005-07-03 10:01:38 -07:00
parent 7ec4e60819
commit 944d858969
4 changed files with 18 additions and 63 deletions
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67
fsck-cache.c
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@ -6,6 +6,7 @@
#include "tree.h"
#include "blob.h"
#include "tag.h"
#include "refs.h"
#include "pack.h"
#define REACHABLE 0x0001
@ -303,76 +304,30 @@ static int fsck_dir(int i, char *path)
return 0;
}
static int read_sha1_reference(const char *path)
static int default_refs = 0;
static int fsck_handle_ref(const char *refname, const unsigned char *sha1)
{
char hexname[60];
unsigned char sha1[20];
int fd = open(path, O_RDONLY), len;
struct object *obj;
if (fd < 0)
return -1;
len = read(fd, hexname, sizeof(hexname));
close(fd);
if (len < 40)
return -1;
if (get_sha1_hex(hexname, sha1) < 0)
return -1;
obj = lookup_object(sha1);
if (!obj) {
if (!standalone && has_sha1_file(sha1))
return 0; /* it is in pack */
return error("%s: invalid sha1 pointer %.40s", path, hexname);
return 0; /* it is in a pack */
error("%s: invalid sha1 pointer %s", refname, sha1_to_hex(sha1));
/* We'll continue with the rest despite the error.. */
return 0;
}
default_refs++;
obj->used = 1;
mark_reachable(obj, REACHABLE);
return 0;
}
static int find_file_objects(const char *base, const char *name)
{
int baselen = strlen(base);
int namelen = strlen(name);
char *path = xmalloc(baselen + namelen + 2);
struct stat st;
memcpy(path, base, baselen);
path[baselen] = '/';
memcpy(path + baselen + 1, name, namelen+1);
if (stat(path, &st) < 0)
return 0;
/*
* Recurse into directories
*/
if (S_ISDIR(st.st_mode)) {
int count = 0;
DIR *dir = opendir(path);
if (dir) {
struct dirent *de;
while ((de = readdir(dir)) != NULL) {
if (de->d_name[0] == '.')
continue;
count += find_file_objects(path, de->d_name);
}
closedir(dir);
}
return count;
}
if (S_ISREG(st.st_mode))
return read_sha1_reference(path) == 0;
return 0;
}
static void get_default_heads(void)
{
char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
int count = find_file_objects(git_dir, "refs");
if (!count)
for_each_ref(fsck_handle_ref);
if (!default_refs)
die("No default references");
}