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-rw-r--r--fetch-pack.c110
1 files changed, 103 insertions, 7 deletions
diff --git a/fetch-pack.c b/fetch-pack.c
index 36ea092..0a169dc 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -3,6 +3,9 @@
#include "pkt-line.h"
#include "commit.h"
#include "tag.h"
+#include "exec_cmd.h"
+#include "sideband.h"
+#include <sys/wait.h>
static int keep_pack;
static int quiet;
@@ -416,6 +419,103 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
return retval;
}
+static pid_t setup_sideband(int fd[2], int xd[2])
+{
+ pid_t side_pid;
+
+ 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;
+}
+
+static int get_pack(int xd[2], const char **argv)
+{
+ int status;
+ pid_t pid, side_pid;
+ int fd[2];
+
+ side_pid = setup_sideband(fd, xd);
+ pid = fork();
+ if (pid < 0)
+ die("fetch-pack: unable to fork off %s", argv[0]);
+ if (!pid) {
+ dup2(fd[0], 0);
+ close(fd[0]);
+ close(fd[1]);
+ execv_git_cmd(argv);
+ die("%s exec failed", argv[0]);
+ }
+ close(fd[0]);
+ close(fd[1]);
+ 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);
+}
+
+static int explode_rx_pack(int xd[2])
+{
+ const char *argv[3] = { "unpack-objects", quiet ? "-q" : NULL, NULL };
+ return get_pack(xd, argv);
+}
+
+static int keep_rx_pack(int xd[2])
+{
+ const char *argv[6];
+ char keep_arg[256];
+ int n = 0;
+
+ argv[n++] = "index-pack";
+ argv[n++] = "--stdin";
+ if (!quiet)
+ argv[n++] = "-v";
+ if (use_thin_pack)
+ argv[n++] = "--fix-thin";
+ if (keep_pack > 1) {
+ int s = sprintf(keep_arg, "--keep=fetch-pack %i on ", getpid());
+ if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
+ strcpy(keep_arg + s, "localhost");
+ argv[n++] = keep_arg;
+ }
+ argv[n] = NULL;
+ return get_pack(xd, argv);
+}
+
static int fetch_pack(int fd[2], int nr_match, char **match)
{
struct ref *ref;
@@ -447,17 +547,13 @@ static int fetch_pack(int fd[2], int nr_match, char **match)
goto all_done;
}
if (find_common(fd, sha1, ref) < 0)
- if (!keep_pack)
+ if (keep_pack != 1)
/* When cloning, it is not unusual to have
* no common commit.
*/
fprintf(stderr, "warning: no common commits\n");
- if (keep_pack)
- status = receive_keep_pack(fd, "git-fetch-pack", quiet, use_sideband);
- else
- status = receive_unpack_pack(fd, "git-fetch-pack", quiet, use_sideband);
-
+ status = (keep_pack) ? keep_rx_pack(fd) : explode_rx_pack(fd);
if (status)
die("git-fetch-pack: fetch failed.");
@@ -494,7 +590,7 @@ int main(int argc, char **argv)
continue;
}
if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
- keep_pack = 1;
+ keep_pack++;
continue;
}
if (!strcmp("--thin", arg)) {