mirror/git
1
0
Fork 0
mirror of https://github.com/git/git.git synced 2024-11-18 02:23:52 +01:00
Code

Generalize the "show each ref" code in receice-pack

Browse Source 
This turns it into a generic "do xyz for each ref" library function.
This commit is contained in:
Linus Torvalds 2005-07-02 20:23:36 -07:00
parent ad8c80a58f
commit 8a65ff7666
3 changed files with 77 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
receive-pack.c
View File

@ -1,4 +1,5 @@
#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
#include <sys/wait.h>
@ -6,63 +7,15 @@ static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
static const char *unpacker = "git-unpack-objects";
static void show_ref(const char *path, unsigned char *sha1)
static int show_ref(const char *path, unsigned char *sha1)
{
packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
return 0;
}
static int read_ref(const char *path, unsigned char *sha1)
static void write_head_info(void)
{
int ret = -1;
int fd = open(path, O_RDONLY);
if (fd >= 0) {
char buffer[60];
if (read(fd, buffer, sizeof(buffer)) >= 40)
ret = get_sha1_hex(buffer, sha1);
close(fd);
}
return ret;
}
static void write_head_info(const char *base)
{
DIR *dir = opendir(base);
if (dir) {
struct dirent *de;
int baselen = strlen(base);
char *path = xmalloc(baselen + 257);
memcpy(path, base, baselen);
while ((de = readdir(dir)) != NULL) {
char sha1[20];
struct stat st;
int namelen;
if (de->d_name[0] == '.')
continue;
namelen = strlen(de->d_name);
if (namelen > 255)
continue;
memcpy(path + baselen, de->d_name, namelen+1);
if (lstat(path, &st) < 0)
continue;
if (S_ISDIR(st.st_mode)) {
path[baselen + namelen] = '/';
path[baselen + namelen + 1] = 0;
write_head_info(path);
continue;
}
if (read_ref(path, sha1) < 0)
continue;
if (!has_sha1_file(sha1))
continue;
show_ref(path, sha1);
}
free(path);
closedir(dir);
}
for_each_ref(show_ref);
}
struct command {
@ -256,7 +209,7 @@ int main(int argc, char **argv)
if (access("objects", X_OK) < 0 || access("refs/heads", X_OK) < 0)
die("%s doesn't appear to be a git directory", dir);
write_head_info("refs/");
write_head_info();
/* EOF */
packet_flush(1);

65
refs.c
View File

@ -3,6 +3,71 @@
#include <errno.h>
static int read_ref(const char *path, unsigned char *sha1)
{
int ret = -1;
int fd = open(path, O_RDONLY);
if (fd >= 0) {
char buffer[60];
if (read(fd, buffer, sizeof(buffer)) >= 40)
ret = get_sha1_hex(buffer, sha1);
close(fd);
}
return ret;
}
static int do_for_each_ref(const char *base, int (*fn)(const char *path, unsigned char *sha1))
{
int retval = 0;
DIR *dir = opendir(base);
if (dir) {
struct dirent *de;
int baselen = strlen(base);
char *path = xmalloc(baselen + 257);
memcpy(path, base, baselen);
while ((de = readdir(dir)) != NULL) {
unsigned char sha1[20];
struct stat st;
int namelen;
if (de->d_name[0] == '.')
continue;
namelen = strlen(de->d_name);
if (namelen > 255)
continue;
memcpy(path + baselen, de->d_name, namelen+1);
if (lstat(path, &st) < 0)
continue;
if (S_ISDIR(st.st_mode)) {
path[baselen + namelen] = '/';
path[baselen + namelen + 1] = 0;
retval = do_for_each_ref(path, fn);
if (retval)
break;
continue;
}
if (read_ref(path, sha1) < 0)
continue;
if (!has_sha1_file(sha1))
continue;
retval = fn(path, sha1);
if (retval)
break;
}
free(path);
closedir(dir);
}
return retval;
}
int for_each_ref(int (*fn)(const char *path, unsigned char *sha1))
{
return do_for_each_ref("refs/", fn);
}
static char *ref_file_name(const char *ref)
{
char *base = get_refs_directory();

6
refs.h
View File

@ -1,6 +1,12 @@
#ifndef REFS_H
#define REFS_H
/*
* Calls the specified function for each ref file until it returns nonzero,
* and returns the value
*/
extern int for_each_ref(int (*fn)(const char *path, unsigned char *sha1));
/** Reads the refs file specified into sha1 **/
extern int get_ref_sha1(const char *ref, unsigned char *sha1);