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https://github.com/git/git.git
synced 2024-11-24 18:33:43 +08:00
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>
This commit is contained in:
Junio C Hamano
parent
84c8d8aec5
commit
11dcec07a4
188
clone-pack.c
188
clone-pack.c
@ -4,6 +4,7 @@
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#include <sys/wait.h>
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static int quiet;
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static int keep_pack;
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static const char clone_pack_usage[] = "git-clone-pack [-q] [--exec=<git-upload-pack>] [<host>:]<directory> [<heads>]*";
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static const char *exec = "git-upload-pack";
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@ -106,18 +107,11 @@ static void write_refs(struct ref *ref)
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free(head_path);
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}
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static int clone_pack(int fd[2], int nr_match, char **match)
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static int clone_by_unpack(int fd[2])
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{
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struct ref *refs;
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int status;
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pid_t pid;
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get_remote_heads(fd[0], &refs, nr_match, match);
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if (!refs) {
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packet_flush(fd[1]);
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die("no matching remote head");
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}
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clone_handshake(fd, refs);
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pid = fork();
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if (pid < 0)
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die("git-clone-pack: unable to fork off git-unpack-objects");
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@ -139,7 +133,6 @@ static int clone_pack(int fd[2], int nr_match, char **match)
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int code = WEXITSTATUS(status);
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if (code)
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die("git-unpack-objects died with error code %d", code);
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write_refs(refs);
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return 0;
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}
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if (WIFSIGNALED(status)) {
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@ -149,6 +142,178 @@ static int clone_pack(int fd[2], int nr_match, char **match)
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die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
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}
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static int finish_pack(const char *pack_tmp_name)
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{
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int pipe_fd[2];
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pid_t pid;
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char idx[PATH_MAX];
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char final[PATH_MAX];
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char hash[41];
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unsigned char sha1[20];
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char *cp;
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int err = 0;
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if (pipe(pipe_fd) < 0)
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die("git-clone-pack: unable to set up pipe");
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strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
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cp = strrchr(idx, '/');
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memcpy(cp, "/pidx", 5);
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pid = fork();
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if (pid < 0)
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die("git-clone-pack: unable to fork off git-index-pack");
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if (!pid) {
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close(0);
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dup2(pipe_fd[1], 1);
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close(pipe_fd[0]);
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close(pipe_fd[1]);
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execlp("git-index-pack","git-index-pack",
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"-o", idx, pack_tmp_name, NULL);
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error("cannot exec git-index-pack <%s> <%s>",
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idx, pack_tmp_name);
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exit(1);
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}
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close(pipe_fd[1]);
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if (read(pipe_fd[0], hash, 40) != 40) {
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error("git-clone-pack: unable to read from git-index-pack");
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err = 1;
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}
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close(pipe_fd[0]);
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for (;;) {
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int status, code;
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int retval = waitpid(pid, &status, 0);
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if (retval < 0) {
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if (errno == EINTR)
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continue;
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error("waitpid failed (%s)", strerror(retval));
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goto error_die;
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}
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if (WIFSIGNALED(status)) {
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int sig = WTERMSIG(status);
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error("git-index-pack died of signal %d", sig);
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goto error_die;
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}
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if (!WIFEXITED(status)) {
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error("git-index-pack died of unnatural causes %d",
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status);
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goto error_die;
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}
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code = WEXITSTATUS(status);
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if (code) {
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error("git-index-pack died with error code %d", code);
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goto error_die;
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}
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if (err)
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goto error_die;
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break;
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}
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hash[40] = 0;
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if (get_sha1_hex(hash, sha1)) {
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error("git-index-pack reported nonsense '%s'", hash);
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goto error_die;
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}
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/* Now we have pack in pack_tmp_name[], and
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* idx in idx[]; rename them to their final names.
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*/
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snprintf(final, sizeof(final),
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"%s/pack/pack-%s.pack", get_object_directory(), hash);
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move_temp_to_file(pack_tmp_name, final);
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snprintf(final, sizeof(final),
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"%s/pack/pack-%s.idx", get_object_directory(), hash);
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move_temp_to_file(idx, final);
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return 0;
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error_die:
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unlink(idx);
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unlink(pack_tmp_name);
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exit(1);
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}
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static int clone_without_unpack(int fd[2])
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{
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char tmpfile[PATH_MAX];
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int ofd, ifd;
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ifd = fd[0];
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snprintf(tmpfile, sizeof(tmpfile),
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"%s/pack-XXXXXX", get_object_directory());
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ofd = mkstemp(tmpfile);
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if (ofd < 0)
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return error("unable to create temporary file %s", tmpfile);
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while (1) {
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char buf[8192];
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ssize_t sz, wsz, pos;
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sz = read(ifd, buf, sizeof(buf));
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if (sz == 0)
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break;
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if (sz < 0) {
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error("error reading pack (%s)", strerror(errno));
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close(ofd);
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unlink(tmpfile);
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return -1;
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}
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pos = 0;
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while (pos < sz) {
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wsz = write(ofd, buf + pos, sz - pos);
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if (wsz < 0) {
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error("error writing pack (%s)",
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strerror(errno));
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close(ofd);
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unlink(tmpfile);
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return -1;
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}
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pos += wsz;
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}
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}
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close(ofd);
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return finish_pack(tmpfile);
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}
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static int clone_pack(int fd[2], int nr_match, char **match)
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{
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struct ref *refs;
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int status;
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get_remote_heads(fd[0], &refs, nr_match, match);
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if (!refs) {
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packet_flush(fd[1]);
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die("no matching remote head");
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}
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clone_handshake(fd, refs);
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if (keep_pack)
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status = clone_without_unpack(fd);
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else
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status = clone_by_unpack(fd);
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if (!status)
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write_refs(refs);
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return status;
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}
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static int clone_options(const char *var, const char *value)
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{
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if (!strcmp("clone.keeppack", var)) {
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keep_pack = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp("clone.quiet", var)) {
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quiet = git_config_bool(var, value);
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return 0;
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}
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/*
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* Put other local option parsing for this program
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* here ...
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*/
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/* Fall back on the default ones */
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return git_default_config(var, value);
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}
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int main(int argc, char **argv)
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{
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int i, ret, nr_heads;
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@ -156,6 +321,7 @@ int main(int argc, char **argv)
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int fd[2];
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pid_t pid;
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git_config(clone_options);
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nr_heads = 0;
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heads = NULL;
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for (i = 1; i < argc; i++) {
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@ -170,6 +336,10 @@ int main(int argc, char **argv)
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exec = arg + 7;
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continue;
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}
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if (!strcmp("--keep", arg)) {
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keep_pack = 1;
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continue;
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}
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usage(clone_pack_usage);
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}
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dest = arg;
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