#include "cache.h"
+#include "refs.h"
#include "pkt-line.h"
-static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
-
+static const char send_pack_usage[] =
+"git-send-pack [--exec=git-receive-pack] [host:]directory [heads]*";
static const char *exec = "git-receive-pack";
-static int send_pack(int in, int out)
+struct ref {
+ struct ref *next;
+ unsigned char old_sha1[20];
+ unsigned char new_sha1[20];
+ char name[0];
+};
+
+static int is_zero_sha1(const unsigned char *sha1)
{
- for (;;) {
- static char buffer[1000];
- int len;
+ int i;
- len = packet_read_line(in, buffer, sizeof(buffer));
- if (len > 0) {
- write(2, buffer, len);
- continue;
- }
- break;
+ for (i = 0; i < 20; i++) {
+ if (*sha1++)
+ return 0;
}
- packet_flush(out);
- close(out);
- return 0;
+ return 1;
}
-/*
- * First, make it shell-safe. We do this by just disallowing any
- * special characters. Somebody who cares can do escaping and let
- * through the rest. But since we're doing to feed this to ssh as
- * a command line, we're going to be pretty damn anal for now.
- */
-static char *shell_safe(char *url)
+static void exec_pack_objects(void)
{
- char *n = url;
- unsigned char c;
- static const char flags[256] = {
- ['0'...'9'] = 1,
- ['a'...'z'] = 1,
- ['A'...'Z'] = 1,
- ['.'] = 1, ['/'] = 1,
- ['-'] = 1, ['+'] = 1,
- [':'] = 1
+ static char *args[] = {
+ "git-pack-objects",
+ "--stdout",
+ NULL
};
+ execvp("git-pack-objects", args);
+ die("git-pack-objects exec failed (%s)", strerror(errno));
+}
- while ((c = *n++) != 0) {
- if (flags[c] != 1)
- die("I don't like '%c'. Sue me.", c);
+static void exec_rev_list(struct ref *refs)
+{
+ static char *args[1000];
+ int i = 0;
+
+ args[i++] = "git-rev-list"; /* 0 */
+ args[i++] = "--objects"; /* 1 */
+ while (refs) {
+ char *buf = malloc(100);
+ if (i > 900)
+ die("git-rev-list environment overflow");
+ if (!is_zero_sha1(refs->old_sha1)) {
+ args[i++] = buf;
+ snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
+ buf += 50;
+ }
+ if (!is_zero_sha1(refs->new_sha1)) {
+ args[i++] = buf;
+ snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
+ }
+ refs = refs->next;
}
- return url;
+ args[i] = NULL;
+ execvp("git-rev-list", args);
+ die("git-rev-list exec failed (%s)", strerror(errno));
}
-/*
- * Yeah, yeah, fixme. Need to pass in the heads etc.
- */
-static int setup_connection(int fd[2], char *url, char **heads)
+static void rev_list(int fd, struct ref *refs)
{
- char command[1024];
- const char *host, *path;
- char *colon;
- int pipefd[2][2];
-
- url = shell_safe(url);
- host = NULL;
- path = url;
- colon = strchr(url, ':');
- if (colon) {
- *colon = 0;
- host = url;
- path = colon+1;
+ int pipe_fd[2];
+ pid_t pack_objects_pid;
+
+ if (pipe(pipe_fd) < 0)
+ die("rev-list setup: pipe failed");
+ pack_objects_pid = fork();
+ if (!pack_objects_pid) {
+ dup2(pipe_fd[0], 0);
+ dup2(fd, 1);
+ close(pipe_fd[0]);
+ close(pipe_fd[1]);
+ close(fd);
+ exec_pack_objects();
+ die("pack-objects setup failed");
}
- snprintf(command, sizeof(command), "%s %s", exec, path);
- if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
- die("unable to create pipe pair for communication");
- if (!fork()) {
- dup2(pipefd[1][0], 0);
- dup2(pipefd[0][1], 1);
- close(pipefd[0][0]);
- close(pipefd[0][1]);
- close(pipefd[1][0]);
- close(pipefd[1][1]);
- if (host)
- execlp("ssh", "ssh", host, command, NULL);
- else
- execlp("sh", "sh", "-c", command, NULL);
- die("exec failed");
- }
- fd[0] = pipefd[0][0];
- fd[1] = pipefd[1][1];
- close(pipefd[0][1]);
- close(pipefd[1][0]);
+ if (pack_objects_pid < 0)
+ die("pack-objects fork failed");
+ dup2(pipe_fd[1], 1);
+ close(pipe_fd[0]);
+ close(pipe_fd[1]);
+ close(fd);
+ exec_rev_list(refs);
+}
+
+static int pack_objects(int fd, struct ref *refs)
+{
+ pid_t rev_list_pid;
+
+ rev_list_pid = fork();
+ if (!rev_list_pid) {
+ rev_list(fd, refs);
+ die("rev-list setup failed");
+ }
+ if (rev_list_pid < 0)
+ die("rev-list fork failed");
+ /*
+ * We don't wait for the rev-list pipeline in the parent:
+ * we end up waiting for the other end instead
+ */
+ return 0;
+}
+
+static int read_ref(const char *ref, unsigned char *sha1)
+{
+ int fd, ret;
+ char buffer[60];
+
+ fd = open(git_path("%s", ref), O_RDONLY);
+ if (fd < 0)
+ return -1;
+ ret = -1;
+ if (read(fd, buffer, sizeof(buffer)) >= 40)
+ ret = get_sha1_hex(buffer, sha1);
+ close(fd);
+ return ret;
+}
+
+static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
+{
+ if (!has_sha1_file(old_sha1))
+ return 0;
+ /*
+ * FIXME! It is not correct to say that the new one is newer
+ * just because we don't have the old one!
+ *
+ * We should really see if we can reach the old_sha1 commit
+ * from the new_sha1 one.
+ */
+ return 1;
+}
+
+static int local_ref_nr_match;
+static char **local_ref_match;
+static struct ref **local_ref_list;
+
+static int try_to_match(const char *refname, const unsigned char *sha1)
+{
+ struct ref *ref;
+ int len;
+
+ if (!path_match(refname, local_ref_nr_match, local_ref_match))
+ return 0;
+
+ len = strlen(refname)+1;
+ ref = xmalloc(sizeof(*ref) + len);
+ memset(ref->old_sha1, 0, 20);
+ memcpy(ref->new_sha1, sha1, 20);
+ memcpy(ref->name, refname, len);
+ ref->next = NULL;
+ *local_ref_list = ref;
+ local_ref_list = &ref->next;
+ return 0;
+}
+
+static int send_pack(int in, int out, int nr_match, char **match)
+{
+ struct ref *ref_list = NULL, **last_ref = &ref_list;
+ struct ref *ref;
+ int new_refs;
+
+ /*
+ * Read all the refs from the other end
+ */
+ for (;;) {
+ unsigned char old_sha1[20];
+ static char buffer[1000];
+ char *name;
+ int len;
+
+ len = packet_read_line(in, buffer, sizeof(buffer));
+ if (!len)
+ break;
+ if (buffer[len-1] == '\n')
+ buffer[--len] = 0;
+
+ if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
+ die("protocol error: expected sha/ref, got '%s'", buffer);
+ name = buffer + 41;
+ ref = xmalloc(sizeof(*ref) + len - 40);
+ memcpy(ref->old_sha1, old_sha1, 20);
+ memset(ref->new_sha1, 0, 20);
+ memcpy(ref->name, buffer + 41, len - 40);
+ ref->next = NULL;
+ *last_ref = ref;
+ last_ref = &ref->next;
+ }
+
+ /*
+ * Go through the refs, see if we want to update
+ * any of them..
+ */
+ for (ref = ref_list; ref; ref = ref->next) {
+ unsigned char new_sha1[20];
+ char *name = ref->name;
+
+ if (nr_match && !path_match(name, nr_match, match))
+ continue;
+
+ if (read_ref(name, new_sha1) < 0)
+ continue;
+
+ if (!memcmp(ref->old_sha1, new_sha1, 20)) {
+ fprintf(stderr, "'%s' unchanged\n", name);
+ continue;
+ }
+
+ if (!ref_newer(new_sha1, ref->old_sha1)) {
+ error("remote '%s' points to object I don't have", name);
+ continue;
+ }
+
+ /* Ok, mark it for update */
+ memcpy(ref->new_sha1, new_sha1, 20);
+ }
+
+ /*
+ * See if we have any refs that the other end didn't have
+ */
+ if (nr_match) {
+ local_ref_nr_match = nr_match;
+ local_ref_match = match;
+ local_ref_list = last_ref;
+ for_each_ref(try_to_match);
+ }
+
+ /*
+ * Finally, tell the other end!
+ */
+ new_refs = 0;
+ for (ref = ref_list; ref; ref = ref->next) {
+ char old_hex[60], *new_hex;
+ if (is_zero_sha1(ref->new_sha1))
+ continue;
+ new_refs++;
+ strcpy(old_hex, sha1_to_hex(ref->old_sha1));
+ new_hex = sha1_to_hex(ref->new_sha1);
+ packet_write(out, "%s %s %s", old_hex, new_hex, ref->name);
+ fprintf(stderr, "'%s': updating from %s to %s\n", ref->name, old_hex, new_hex);
+ }
+
+ packet_flush(out);
+ if (new_refs)
+ pack_objects(out, ref_list);
+ close(out);
return 0;
}
int i, nr_heads = 0;
char *dest = NULL;
char **heads = NULL;
- int fd[2];
+ int fd[2], ret;
+ pid_t pid;
argv++;
for (i = 1; i < argc; i++) {
}
if (!dest)
usage(send_pack_usage);
- if (setup_connection(fd, dest, heads))
+ pid = git_connect(fd, dest, exec);
+ if (pid < 0)
return 1;
- return send_pack(fd[0], fd[1]);
+ ret = send_pack(fd[0], fd[1], nr_heads, heads);
+ close(fd[0]);
+ close(fd[1]);
+ finish_connect(pid);
+ return ret;
}
projects / git.git / blobdiff