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/*
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
#include "commit.h"
#include "fetch.h"
static int use_link = 0;
static int use_symlink = 0;
static int use_filecopy = 1;
static char *path; /* "Remote" git repository */
void prefetch(unsigned char *sha1)
{
}
static struct packed_git *packs = NULL;
static void setup_index(unsigned char *sha1)
{
struct packed_git *new_pack;
char filename[PATH_MAX];
strcpy(filename, path);
strcat(filename, "/objects/pack/pack-");
strcat(filename, sha1_to_hex(sha1));
strcat(filename, ".idx");
new_pack = parse_pack_index_file(sha1, filename);
new_pack->next = packs;
packs = new_pack;
}
static int setup_indices(void)
{
DIR *dir;
struct dirent *de;
char filename[PATH_MAX];
unsigned char sha1[20];
sprintf(filename, "%s/objects/pack/", path);
dir = opendir(filename);
if (!dir)
return -1;
while ((de = readdir(dir)) != NULL) {
int namelen = strlen(de->d_name);
if (namelen != 50 ||
strcmp(de->d_name + namelen - 5, ".pack"))
continue;
get_sha1_hex(de->d_name + 5, sha1);
setup_index(sha1);
}
closedir(dir);
return 0;
}
static int copy_file(const char *source, char *dest, const char *hex,
int warn_if_not_exists)
{
safe_create_leading_directories(dest);
if (use_link) {
if (!link(source, dest)) {
pull_say("link %s\n", hex);
return 0;
}
/* If we got ENOENT there is no point continuing. */
if (errno == ENOENT) {
if (warn_if_not_exists)
fprintf(stderr, "does not exist %s\n", source);
return -1;
}
}
if (use_symlink) {
struct stat st;
if (stat(source, &st)) {
if (!warn_if_not_exists && errno == ENOENT)
return -1;
fprintf(stderr, "cannot stat %s: %s\n", source,
strerror(errno));
return -1;
}
if (!symlink(source, dest)) {
pull_say("symlink %s\n", hex);
return 0;
}
}
if (use_filecopy) {
int ifd, ofd, status = 0;
ifd = open(source, O_RDONLY);
if (ifd < 0) {
if (!warn_if_not_exists && errno == ENOENT)
return -1;
fprintf(stderr, "cannot open %s\n", source);
return -1;
}
ofd = open(dest, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (ofd < 0) {
fprintf(stderr, "cannot open %s\n", dest);
close(ifd);
return -1;
}
status = copy_fd(ifd, ofd);
close(ofd);
if (status)
fprintf(stderr, "cannot write %s\n", dest);
else
pull_say("copy %s\n", hex);
return status;
}
fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
return -1;
}
static int fetch_pack(const unsigned char *sha1)
{
struct packed_git *target;
char filename[PATH_MAX];
if (setup_indices())
return -1;
target = find_sha1_pack(sha1, packs);
if (!target)
return error("Couldn't find %s: not separate or in any pack",
sha1_to_hex(sha1));
if (get_verbosely) {
fprintf(stderr, "Getting pack %s\n",
sha1_to_hex(target->sha1));
fprintf(stderr, " which contains %s\n",
sha1_to_hex(sha1));
}
sprintf(filename, "%s/objects/pack/pack-%s.pack",
path, sha1_to_hex(target->sha1));
copy_file(filename, sha1_pack_name(target->sha1),
sha1_to_hex(target->sha1), 1);
sprintf(filename, "%s/objects/pack/pack-%s.idx",
path, sha1_to_hex(target->sha1));
copy_file(filename, sha1_pack_index_name(target->sha1),
sha1_to_hex(target->sha1), 1);
install_packed_git(target);
return 0;
}
static int fetch_file(const unsigned char *sha1)
{
static int object_name_start = -1;
static char filename[PATH_MAX];
char *hex = sha1_to_hex(sha1);
char *dest_filename = sha1_file_name(sha1);
if (object_name_start < 0) {
strcpy(filename, path); /* e.g. git.git */
strcat(filename, "/objects/");
object_name_start = strlen(filename);
}
filename[object_name_start+0] = hex[0];
filename[object_name_start+1] = hex[1];
filename[object_name_start+2] = '/';
strcpy(filename + object_name_start + 3, hex + 2);
return copy_file(filename, dest_filename, hex, 0);
}
int fetch(unsigned char *sha1)
{
if (has_sha1_file(sha1))
return 0;
else
return fetch_file(sha1) && fetch_pack(sha1);
}
int fetch_ref(char *ref, unsigned char *sha1)
{
static int ref_name_start = -1;
static char filename[PATH_MAX];
static char hex[41];
int ifd;
if (ref_name_start < 0) {
sprintf(filename, "%s/refs/", path);
ref_name_start = strlen(filename);
}
strcpy(filename + ref_name_start, ref);
ifd = open(filename, O_RDONLY);
if (ifd < 0) {
close(ifd);
fprintf(stderr, "cannot open %s\n", filename);
return -1;
}
if (read(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) {
close(ifd);
fprintf(stderr, "cannot read from %s\n", filename);
return -1;
}
close(ifd);
pull_say("ref %s\n", sha1_to_hex(sha1));
return 0;
}
static const char local_pull_usage[] =
"git-local-fetch [-c] [-t] [-a] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
/*
* By default we only use file copy.
* If -l is specified, a hard link is attempted.
* If -s is specified, then a symlink is attempted.
* If -n is _not_ specified, then a regular file-to-file copy is done.
*/
int main(int argc, char **argv)
{
const char *write_ref = NULL;
char *commit_id;
int arg = 1;
setup_git_directory();
git_config(git_default_config);
while (arg < argc && argv[arg][0] == '-') {
if (argv[arg][1] == 't')
get_tree = 1;
else if (argv[arg][1] == 'c')
get_history = 1;
else if (argv[arg][1] == 'a') {
get_all = 1;
get_tree = 1;
get_history = 1;
}
else if (argv[arg][1] == 'l')
use_link = 1;
else if (argv[arg][1] == 's')
use_symlink = 1;
else if (argv[arg][1] == 'n')
use_filecopy = 0;
else if (argv[arg][1] == 'v')
get_verbosely = 1;
else if (argv[arg][1] == 'w')
write_ref = argv[++arg];
else if (!strcmp(argv[arg], "--recover"))
get_recover = 1;
else
usage(local_pull_usage);
arg++;
}
if (argc < arg + 2)
usage(local_pull_usage);
commit_id = argv[arg];
path = argv[arg + 1];
if (pull(1, &commit_id, &write_ref, path))
return 1;
return 0;
}
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