#include "pack.h"
#include "sideband.h"
#include "fetch-pack.h"
+#include "run-command.h"
static int transfer_unpack_limit = -1;
static int fetch_unpack_limit = -1;
static int unpack_limit = 100;
-static struct fetch_pack_args args;
+static struct fetch_pack_args args = {
+ /* .uploadpack = */ "git-upload-pack",
+};
static const char fetch_pack_usage[] =
"git-fetch-pack [--all] [--quiet|-q] [--keep|-k] [--thin] [--upload-pack=<git-upload-pack>] [--depth=<n>] [--no-progress] [-v] [<host>:]<directory> [<refs>...]";
-static const char *uploadpack = "git-upload-pack";
#define COMPLETE (1U << 0)
#define COMMON (1U << 1)
#define MAX_IN_VAIN 256
static struct commit_list *rev_list;
-static int non_common_revs, multi_ack, use_thin_pack, use_sideband;
+static int non_common_revs, multi_ack, use_sideband;
static void rev_list_push(struct commit *commit, int mark)
{
(multi_ack ? " multi_ack" : ""),
(use_sideband == 2 ? " side-band-64k" : ""),
(use_sideband == 1 ? " side-band" : ""),
- (use_thin_pack ? " thin-pack" : ""),
+ (args.use_thin_pack ? " thin-pack" : ""),
(args.no_progress ? " no-progress" : ""),
" ofs-delta");
else
return retval;
}
-static pid_t setup_sideband(int fd[2], int xd[2])
+static int sideband_demux(int fd, void *data)
{
- pid_t side_pid;
+ int *xd = data;
- if (!use_sideband) {
- fd[0] = xd[0];
- fd[1] = xd[1];
- return 0;
- }
- /* xd[] is talking with upload-pack; subprocess reads from
- * xd[0], spits out band#2 to stderr, and feeds us band#1
- * through our fd[0].
- */
- if (pipe(fd) < 0)
- die("fetch-pack: unable to set up pipe");
- side_pid = fork();
- if (side_pid < 0)
- die("fetch-pack: unable to fork off sideband demultiplexer");
- if (!side_pid) {
- /* subprocess */
- close(fd[0]);
- if (xd[0] != xd[1])
- close(xd[1]);
- if (recv_sideband("fetch-pack", xd[0], fd[1], 2))
- exit(1);
- exit(0);
- }
- close(xd[0]);
- close(fd[1]);
- fd[1] = xd[1];
- return side_pid;
+ return recv_sideband("fetch-pack", xd[0], fd, 2);
}
static int get_pack(int xd[2], char **pack_lockfile)
{
- int status;
- pid_t pid, side_pid;
- int fd[2];
+ struct async demux;
const char *argv[20];
char keep_arg[256];
char hdr_arg[256];
const char **av;
int do_keep = args.keep_pack;
- int keep_pipe[2];
+ struct child_process cmd;
- side_pid = setup_sideband(fd, xd);
+ memset(&demux, 0, sizeof(demux));
+ if (use_sideband) {
+ /* xd[] is talking with upload-pack; subprocess reads from
+ * xd[0], spits out band#2 to stderr, and feeds us band#1
+ * through demux->out.
+ */
+ demux.proc = sideband_demux;
+ demux.data = xd;
+ if (start_async(&demux))
+ die("fetch-pack: unable to fork off sideband"
+ " demultiplexer");
+ }
+ else
+ demux.out = xd[0];
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.argv = argv;
av = argv;
*hdr_arg = 0;
if (!args.keep_pack && unpack_limit) {
struct pack_header header;
- if (read_pack_header(fd[0], &header))
+ if (read_pack_header(demux.out, &header))
die("protocol error: bad pack header");
snprintf(hdr_arg, sizeof(hdr_arg), "--pack_header=%u,%u",
ntohl(header.hdr_version), ntohl(header.hdr_entries));
}
if (do_keep) {
- if (pack_lockfile && pipe(keep_pipe))
- die("fetch-pack: pipe setup failure: %s", strerror(errno));
+ if (pack_lockfile)
+ cmd.out = -1;
*av++ = "index-pack";
*av++ = "--stdin";
if (!args.quiet && !args.no_progress)
*av++ = hdr_arg;
*av++ = NULL;
- pid = fork();
- if (pid < 0)
+ cmd.in = demux.out;
+ cmd.git_cmd = 1;
+ if (start_command(&cmd))
die("fetch-pack: unable to fork off %s", argv[0]);
- if (!pid) {
- dup2(fd[0], 0);
- if (do_keep && pack_lockfile) {
- dup2(keep_pipe[1], 1);
- close(keep_pipe[0]);
- close(keep_pipe[1]);
- }
- close(fd[0]);
- close(fd[1]);
- execv_git_cmd(argv);
- die("%s exec failed", argv[0]);
- }
- close(fd[0]);
- close(fd[1]);
- if (do_keep && pack_lockfile) {
- close(keep_pipe[1]);
- *pack_lockfile = index_pack_lockfile(keep_pipe[0]);
- close(keep_pipe[0]);
- }
- while (waitpid(pid, &status, 0) < 0) {
- if (errno != EINTR)
- die("waiting for %s: %s", argv[0], strerror(errno));
- }
- if (WIFEXITED(status)) {
- int code = WEXITSTATUS(status);
- if (code)
- die("%s died with error code %d", argv[0], code);
- return 0;
- }
- if (WIFSIGNALED(status)) {
- int sig = WTERMSIG(status);
- die("%s died of signal %d", argv[0], sig);
- }
- die("%s died of unnatural causes %d", argv[0], status);
+ if (do_keep && pack_lockfile)
+ *pack_lockfile = index_pack_lockfile(cmd.out);
+
+ if (finish_command(&cmd))
+ die("%s failed", argv[0]);
+ if (use_sideband && finish_async(&demux))
+ die("error in sideband demultiplexer");
+ return 0;
}
static struct ref *do_fetch_pack(int fd[2],
static struct lock_file lock;
-int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
+static void fetch_pack_setup(void)
{
- int i, ret, nr_heads;
- struct ref *ref;
- char *dest = NULL, **heads;
-
+ static int did_setup;
+ if (did_setup)
+ return;
git_config(fetch_pack_config);
-
if (0 <= transfer_unpack_limit)
unpack_limit = transfer_unpack_limit;
else if (0 <= fetch_unpack_limit)
unpack_limit = fetch_unpack_limit;
+ did_setup = 1;
+}
+
+int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
+{
+ int i, ret, nr_heads;
+ struct ref *ref;
+ char *dest = NULL, **heads;
nr_heads = 0;
heads = NULL;
{
int i, ret;
int fd[2];
- pid_t pid;
+ struct child_process *conn;
struct ref *ref;
struct stat st;
+ fetch_pack_setup();
memcpy(&args, my_args, sizeof(args));
if (args.depth > 0) {
if (stat(git_path("shallow"), &st))
st.st_mtime = 0;
}
- pid = git_connect(fd, (char *)dest, uploadpack,
+ conn = git_connect(fd, (char *)dest, args.uploadpack,
args.verbose ? CONNECT_VERBOSE : 0);
- if (pid < 0)
- return NULL;
if (heads && nr_heads)
nr_heads = remove_duplicates(nr_heads, heads);
ref = do_fetch_pack(fd, nr_heads, heads, pack_lockfile);
close(fd[0]);
close(fd[1]);
- ret = finish_connect(pid);
+ ret = finish_connect(conn);
if (!ret && nr_heads) {
/* If the heads to pull were given, we should have
unlink(shallow);
rollback_lock_file(&lock);
} else {
- close(fd);
commit_lock_file(&lock);
}
}