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authorJunio C Hamano <junkio@cox.net>2005-10-13 01:12:27 (GMT)
committerJunio C Hamano <junkio@cox.net>2005-10-13 01:32:03 (GMT)
commit11dcec07a4815b7a37e009df1e8007d7ec08becf (patch)
tree82901508b2d4af64381cad787e811c171738a7d1 /clone-pack.c
parent84c8d8aec535e1d92c5acc36e84ac8e00f6e0e7a (diff)
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clone-pack: new option --keep tells it not to explode the pack.
With new option --keep, or a configuration item clone.keeppack (we need a better name, or start allowing dash,"clone.keep-pack"), the packed data downloaded while cloning is saved as a pack in .git/objects/pack/ locally, with index generated for it with git-index-pack. Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'clone-pack.c')
-rw-r--r--clone-pack.c188
1 files changed, 179 insertions, 9 deletions
diff --git a/clone-pack.c b/clone-pack.c
index c102ca8..9567900 100644
--- a/clone-pack.c
+++ b/clone-pack.c
@@ -4,6 +4,7 @@
#include <sys/wait.h>
static int quiet;
+static int keep_pack;
static const char clone_pack_usage[] = "git-clone-pack [-q] [--exec=<git-upload-pack>] [<host>:]<directory> [<heads>]*";
static const char *exec = "git-upload-pack";
@@ -106,18 +107,11 @@ static void write_refs(struct ref *ref)
free(head_path);
}
-static int clone_pack(int fd[2], int nr_match, char **match)
+static int clone_by_unpack(int fd[2])
{
- struct ref *refs;
int status;
pid_t pid;
- get_remote_heads(fd[0], &refs, nr_match, match);
- if (!refs) {
- packet_flush(fd[1]);
- die("no matching remote head");
- }
- clone_handshake(fd, refs);
pid = fork();
if (pid < 0)
die("git-clone-pack: unable to fork off git-unpack-objects");
@@ -139,7 +133,6 @@ static int clone_pack(int fd[2], int nr_match, char **match)
int code = WEXITSTATUS(status);
if (code)
die("git-unpack-objects died with error code %d", code);
- write_refs(refs);
return 0;
}
if (WIFSIGNALED(status)) {
@@ -149,6 +142,178 @@ static int clone_pack(int fd[2], int nr_match, char **match)
die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
}
+static int finish_pack(const char *pack_tmp_name)
+{
+ int pipe_fd[2];
+ pid_t pid;
+ char idx[PATH_MAX];
+ char final[PATH_MAX];
+ char hash[41];
+ unsigned char sha1[20];
+ char *cp;
+ int err = 0;
+
+ if (pipe(pipe_fd) < 0)
+ die("git-clone-pack: unable to set up pipe");
+
+ strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
+ cp = strrchr(idx, '/');
+ memcpy(cp, "/pidx", 5);
+
+ pid = fork();
+ if (pid < 0)
+ die("git-clone-pack: unable to fork off git-index-pack");
+ if (!pid) {
+ close(0);
+ dup2(pipe_fd[1], 1);
+ close(pipe_fd[0]);
+ close(pipe_fd[1]);
+ execlp("git-index-pack","git-index-pack",
+ "-o", idx, pack_tmp_name, NULL);
+ error("cannot exec git-index-pack <%s> <%s>",
+ idx, pack_tmp_name);
+ exit(1);
+ }
+ close(pipe_fd[1]);
+ if (read(pipe_fd[0], hash, 40) != 40) {
+ error("git-clone-pack: unable to read from git-index-pack");
+ err = 1;
+ }
+ close(pipe_fd[0]);
+
+ for (;;) {
+ int status, code;
+ int retval = waitpid(pid, &status, 0);
+
+ if (retval < 0) {
+ if (errno == EINTR)
+ continue;
+ error("waitpid failed (%s)", strerror(retval));
+ goto error_die;
+ }
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+ error("git-index-pack died of signal %d", sig);
+ goto error_die;
+ }
+ if (!WIFEXITED(status)) {
+ error("git-index-pack died of unnatural causes %d",
+ status);
+ goto error_die;
+ }
+ code = WEXITSTATUS(status);
+ if (code) {
+ error("git-index-pack died with error code %d", code);
+ goto error_die;
+ }
+ if (err)
+ goto error_die;
+ break;
+ }
+ hash[40] = 0;
+ if (get_sha1_hex(hash, sha1)) {
+ error("git-index-pack reported nonsense '%s'", hash);
+ goto error_die;
+ }
+ /* Now we have pack in pack_tmp_name[], and
+ * idx in idx[]; rename them to their final names.
+ */
+ snprintf(final, sizeof(final),
+ "%s/pack/pack-%s.pack", get_object_directory(), hash);
+ move_temp_to_file(pack_tmp_name, final);
+ snprintf(final, sizeof(final),
+ "%s/pack/pack-%s.idx", get_object_directory(), hash);
+ move_temp_to_file(idx, final);
+ return 0;
+
+ error_die:
+ unlink(idx);
+ unlink(pack_tmp_name);
+ exit(1);
+}
+
+static int clone_without_unpack(int fd[2])
+{
+ char tmpfile[PATH_MAX];
+ int ofd, ifd;
+
+ ifd = fd[0];
+ snprintf(tmpfile, sizeof(tmpfile),
+ "%s/pack-XXXXXX", get_object_directory());
+ ofd = mkstemp(tmpfile);
+ if (ofd < 0)
+ return error("unable to create temporary file %s", tmpfile);
+
+ while (1) {
+ char buf[8192];
+ ssize_t sz, wsz, pos;
+ sz = read(ifd, buf, sizeof(buf));
+ if (sz == 0)
+ break;
+ if (sz < 0) {
+ error("error reading pack (%s)", strerror(errno));
+ close(ofd);
+ unlink(tmpfile);
+ return -1;
+ }
+ pos = 0;
+ while (pos < sz) {
+ wsz = write(ofd, buf + pos, sz - pos);
+ if (wsz < 0) {
+ error("error writing pack (%s)",
+ strerror(errno));
+ close(ofd);
+ unlink(tmpfile);
+ return -1;
+ }
+ pos += wsz;
+ }
+ }
+ close(ofd);
+ return finish_pack(tmpfile);
+}
+
+static int clone_pack(int fd[2], int nr_match, char **match)
+{
+ struct ref *refs;
+ int status;
+
+ get_remote_heads(fd[0], &refs, nr_match, match);
+ if (!refs) {
+ packet_flush(fd[1]);
+ die("no matching remote head");
+ }
+ clone_handshake(fd, refs);
+
+ if (keep_pack)
+ status = clone_without_unpack(fd);
+ else
+ status = clone_by_unpack(fd);
+
+ if (!status)
+ write_refs(refs);
+ return status;
+}
+
+static int clone_options(const char *var, const char *value)
+{
+ if (!strcmp("clone.keeppack", var)) {
+ keep_pack = git_config_bool(var, value);
+ return 0;
+ }
+ if (!strcmp("clone.quiet", var)) {
+ quiet = git_config_bool(var, value);
+ return 0;
+ }
+ /*
+ * Put other local option parsing for this program
+ * here ...
+ */
+
+ /* Fall back on the default ones */
+ return git_default_config(var, value);
+}
+
int main(int argc, char **argv)
{
int i, ret, nr_heads;
@@ -156,6 +321,7 @@ int main(int argc, char **argv)
int fd[2];
pid_t pid;
+ git_config(clone_options);
nr_heads = 0;
heads = NULL;
for (i = 1; i < argc; i++) {
@@ -170,6 +336,10 @@ int main(int argc, char **argv)
exec = arg + 7;
continue;
}
+ if (!strcmp("--keep", arg)) {
+ keep_pack = 1;
+ continue;
+ }
usage(clone_pack_usage);
}
dest = arg;