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-rw-r--r--ssh-fetch.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/ssh-fetch.c b/ssh-fetch.c
new file mode 100644
index 0000000..d8f4368
--- /dev/null
+++ b/ssh-fetch.c
@@ -0,0 +1,129 @@
+#include "cache.h"
+#include "commit.h"
+#include "rsh.h"
+#include "fetch.h"
+#include "refs.h"
+
+static int fd_in;
+static int fd_out;
+
+static unsigned char remote_version = 0;
+static unsigned char local_version = 1;
+
+static ssize_t force_write(int fd, void *buffer, size_t length)
+{
+ ssize_t ret = 0;
+ while (ret < length) {
+ ssize_t size = write(fd, buffer + ret, length - ret);
+ if (size < 0) {
+ return size;
+ }
+ if (size == 0) {
+ return ret;
+ }
+ ret += size;
+ }
+ return ret;
+}
+
+void prefetch(unsigned char *sha1)
+{
+ char type = 'o';
+ force_write(fd_out, &type, 1);
+ force_write(fd_out, sha1, 20);
+ //memcpy(requested + 20 * prefetches++, sha1, 20);
+}
+
+static char conn_buf[4096];
+static size_t conn_buf_posn = 0;
+
+int fetch(unsigned char *sha1)
+{
+ int ret;
+ signed char remote;
+
+ if (conn_buf_posn) {
+ remote = conn_buf[0];
+ memmove(conn_buf, conn_buf + 1, --conn_buf_posn);
+ } else {
+ if (read(fd_in, &remote, 1) < 1)
+ return -1;
+ }
+ //fprintf(stderr, "Got %d\n", remote);
+ if (remote < 0)
+ return remote;
+ ret = write_sha1_from_fd(sha1, fd_in, conn_buf, 4096, &conn_buf_posn);
+ if (!ret)
+ pull_say("got %s\n", sha1_to_hex(sha1));
+ return ret;
+}
+
+static int get_version(void)
+{
+ char type = 'v';
+ write(fd_out, &type, 1);
+ write(fd_out, &local_version, 1);
+ if (read(fd_in, &remote_version, 1) < 1) {
+ return error("Couldn't read version from remote end");
+ }
+ return 0;
+}
+
+int fetch_ref(char *ref, unsigned char *sha1)
+{
+ signed char remote;
+ char type = 'r';
+ write(fd_out, &type, 1);
+ write(fd_out, ref, strlen(ref) + 1);
+ read(fd_in, &remote, 1);
+ if (remote < 0)
+ return remote;
+ read(fd_in, sha1, 20);
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ char *commit_id;
+ char *url;
+ int arg = 1;
+ const char *prog;
+
+ prog = getenv("GIT_SSH_PUSH");
+ if (!prog) prog = "git-ssh-upload";
+
+ 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] == 'v') {
+ get_verbosely = 1;
+ } else if (argv[arg][1] == 'w') {
+ write_ref = argv[arg + 1];
+ arg++;
+ }
+ arg++;
+ }
+ if (argc < arg + 2) {
+ usage("git-ssh-fetch [-c] [-t] [-a] [-v] [-d] [--recover] [-w ref] commit-id url");
+ return 1;
+ }
+ commit_id = argv[arg];
+ url = argv[arg + 1];
+
+ if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
+ return 1;
+
+ if (get_version())
+ return 1;
+
+ if (pull(commit_id))
+ return 1;
+
+ return 0;
+}