#include "cache.h"
+#include "commit.h"
+#include "tag.h"
+#include "refs.h"
#include "pkt-line.h"
-#include <sys/wait.h>
-
-static const char send_pack_usage[] = "git-send-pack [--exec=other] destination [heads]*";
+#include "exec_cmd.h"
+static const char send_pack_usage[] =
+"git-send-pack [--all] [--exec=git-receive-pack] <remote> [<head>...]\n"
+" --all and explicit <head> specification are mutually exclusive.";
static const char *exec = "git-receive-pack";
+static int verbose;
+static int send_all;
+static int force_update;
+static int use_thin_pack;
+
+static int is_zero_sha1(const unsigned char *sha1)
+{
+ int i;
-struct ref {
- struct ref *next;
- unsigned char old_sha1[20];
- unsigned char new_sha1[20];
- char name[0];
-};
+ for (i = 0; i < 20; i++) {
+ if (*sha1++)
+ return 0;
+ }
+ return 1;
+}
static void exec_pack_objects(void)
{
- static char *args[] = {
- "git-pack-objects",
+ static const char *args[] = {
+ "pack-objects",
+ "--all-progress",
"--stdout",
NULL
};
- execvp("git-pack-objects", args);
+ execv_git_cmd(args);
die("git-pack-objects exec failed (%s)", strerror(errno));
}
static void exec_rev_list(struct ref *refs)
{
- static char *args[1000];
+ static const char *args[4];
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");
- args[i++] = buf;
- snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
- buf += 50;
- args[i++] = buf;
- snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
- refs = refs->next;
- }
+ args[i++] = "rev-list"; /* 0 */
+ if (use_thin_pack) /* 1 */
+ args[i++] = "--objects-edge";
+ else
+ args[i++] = "--objects";
+
+ args[i++] = "--stdin";
+
args[i] = NULL;
- execvp("git-rev-list", args);
+ execv_git_cmd(args);
die("git-rev-list exec failed (%s)", strerror(errno));
}
+/*
+ * Run "rev-list --stdin | pack-objects" pipe.
+ */
static void rev_list(int fd, struct ref *refs)
{
int pipe_fd[2];
die("rev-list setup: pipe failed");
pack_objects_pid = fork();
if (!pack_objects_pid) {
+ /* The child becomes pack-objects; reads from pipe
+ * and writes to the original fd
+ */
dup2(pipe_fd[0], 0);
dup2(fd, 1);
close(pipe_fd[0]);
}
if (pack_objects_pid < 0)
die("pack-objects fork failed");
+
+ /* We become rev-list --stdin; output goes to pipe. */
dup2(pipe_fd[1], 1);
close(pipe_fd[0]);
close(pipe_fd[1]);
exec_rev_list(refs);
}
-static int pack_objects(int fd, struct ref *refs)
+/*
+ * Create "rev-list --stdin | pack-objects" pipe and feed
+ * the refs into the pipeline.
+ */
+static void rev_list_generate(int fd, struct ref *refs)
+{
+ int pipe_fd[2];
+ pid_t rev_list_generate_pid;
+
+ if (pipe(pipe_fd) < 0)
+ die("rev-list-generate setup: pipe failed");
+ rev_list_generate_pid = fork();
+ if (!rev_list_generate_pid) {
+ /* The child becomes the "rev-list | pack-objects"
+ * pipeline. It takes input from us, and its output
+ * goes to fd.
+ */
+ dup2(pipe_fd[0], 0);
+ dup2(fd, 1);
+ close(pipe_fd[0]);
+ close(pipe_fd[1]);
+ close(fd);
+ rev_list(fd, refs);
+ die("rev-list setup failed");
+ }
+ if (rev_list_generate_pid < 0)
+ die("rev-list-generate fork failed");
+
+ /* We feed the rev parameters to them. We do not write into
+ * fd nor read from the pipe.
+ */
+ close(pipe_fd[0]);
+ close(fd);
+ while (refs) {
+ char buf[42];
+
+ if (!is_null_sha1(refs->old_sha1) &&
+ has_sha1_file(refs->old_sha1)) {
+ memcpy(buf + 1, sha1_to_hex(refs->old_sha1), 40);
+ buf[0] = '^';
+ buf[41] = '\n';
+ write(pipe_fd[1], buf, 42);
+ }
+ if (!is_null_sha1(refs->new_sha1)) {
+ memcpy(buf, sha1_to_hex(refs->new_sha1), 40);
+ buf[40] = '\n';
+ write(pipe_fd[1], buf, 41);
+ }
+ refs = refs->next;
+ }
+ close(pipe_fd[1]);
+ // waitpid(rev_list_generate_pid);
+ exit(0);
+}
+
+/*
+ * Make a pack stream and spit it out into file descriptor fd
+ */
+static void pack_objects(int fd, struct ref *refs)
{
pid_t rev_list_pid;
rev_list_pid = fork();
if (!rev_list_pid) {
- rev_list(fd, refs);
+ rev_list_generate(fd, refs);
die("rev-list setup failed");
}
if (rev_list_pid < 0)
*/
}
-static int read_ref(const char *ref, unsigned char *sha1)
+static void unmark_and_free(struct commit_list *list, unsigned int mark)
{
- int fd, ret;
- static char pathname[PATH_MAX];
- char buffer[60];
- const char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
-
- snprintf(pathname, sizeof(pathname), "%s/%s", git_dir, ref);
- fd = open(pathname, 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;
+ while (list) {
+ struct commit_list *temp = list;
+ temp->item->object.flags &= ~mark;
+ list = temp->next;
+ free(temp);
+ }
+}
+
+static int ref_newer(const unsigned char *new_sha1,
+ const unsigned char *old_sha1)
+{
+ struct object *o;
+ struct commit *old, *new;
+ struct commit_list *list, *used;
+ int found = 0;
+
+ /* Both new and old must be commit-ish and new is descendant of
+ * old. Otherwise we require --force.
+ */
+ o = deref_tag(parse_object(old_sha1), NULL, 0);
+ if (!o || o->type != OBJ_COMMIT)
+ return 0;
+ old = (struct commit *) o;
+
+ o = deref_tag(parse_object(new_sha1), NULL, 0);
+ if (!o || o->type != OBJ_COMMIT)
+ return 0;
+ new = (struct commit *) o;
+
+ if (parse_commit(new) < 0)
+ return 0;
+
+ used = list = NULL;
+ commit_list_insert(new, &list);
+ while (list) {
+ new = pop_most_recent_commit(&list, 1);
+ commit_list_insert(new, &used);
+ if (new == old) {
+ found = 1;
+ break;
+ }
+ }
+ unmark_and_free(list, 1);
+ unmark_and_free(used, 1);
+ return found;
}
-static int send_pack(int in, int out)
+static struct ref *local_refs, **local_tail;
+static struct ref *remote_refs, **remote_tail;
+
+static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
- struct ref *ref_list = NULL, **last_ref = &ref_list;
struct ref *ref;
+ int len = strlen(refname) + 1;
+ ref = xcalloc(1, sizeof(*ref) + len);
+ hashcpy(ref->new_sha1, sha1);
+ memcpy(ref->name, refname, len);
+ *local_tail = ref;
+ local_tail = &ref->next;
+ return 0;
+}
- for (;;) {
- unsigned char old_sha1[20];
- unsigned char new_sha1[20];
- static char buffer[1000];
- char *name;
- int len;
+static void get_local_heads(void)
+{
+ local_tail = &local_refs;
+ for_each_ref(one_local_ref, NULL);
+}
- len = packet_read_line(in, buffer, sizeof(buffer));
+static int receive_status(int in)
+{
+ char line[1000];
+ int ret = 0;
+ int len = packet_read_line(in, line, sizeof(line));
+ if (len < 10 || memcmp(line, "unpack ", 7)) {
+ fprintf(stderr, "did not receive status back\n");
+ return -1;
+ }
+ if (memcmp(line, "unpack ok\n", 10)) {
+ fputs(line, stderr);
+ ret = -1;
+ }
+ while (1) {
+ len = packet_read_line(in, line, sizeof(line));
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;
- if (read_ref(name, new_sha1) < 0)
- return error("no such local reference '%s'", name);
- if (!has_sha1_file(old_sha1))
- return error("remote '%s' points to object I don't have", name);
- if (!memcmp(old_sha1, new_sha1, 20)) {
- fprintf(stderr, "'%s' unchanged\n", name);
- continue;
+ if (len < 3 ||
+ (memcmp(line, "ok", 2) && memcmp(line, "ng", 2))) {
+ fprintf(stderr, "protocol error: %s\n", line);
+ ret = -1;
+ break;
}
- ref = xmalloc(sizeof(*ref) + len - 40);
- memcpy(ref->old_sha1, old_sha1, 20);
- memcpy(ref->new_sha1, new_sha1, 20);
- memcpy(ref->name, buffer + 41, len - 40);
- ref->next = NULL;
- *last_ref = ref;
- last_ref = &ref->next;
+ if (!memcmp(line, "ok", 2))
+ continue;
+ fputs(line, stderr);
+ ret = -1;
}
+ return ret;
+}
- for (ref = ref_list; ref; ref = ref->next) {
+static int send_pack(int in, int out, int nr_refspec, char **refspec)
+{
+ struct ref *ref;
+ int new_refs;
+ int ret = 0;
+ int ask_for_status_report = 0;
+ int allow_deleting_refs = 0;
+ int expect_status_report = 0;
+
+ /* No funny business with the matcher */
+ remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, REF_NORMAL);
+ get_local_heads();
+
+ /* Does the other end support the reporting? */
+ if (server_supports("report-status"))
+ ask_for_status_report = 1;
+ if (server_supports("delete-refs"))
+ allow_deleting_refs = 1;
+
+ /* match them up */
+ if (!remote_tail)
+ remote_tail = &remote_refs;
+ if (match_refs(local_refs, remote_refs, &remote_tail,
+ nr_refspec, refspec, send_all))
+ return -1;
+
+ if (!remote_refs) {
+ fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
+ return 0;
+ }
+
+ /*
+ * Finally, tell the other end!
+ */
+ new_refs = 0;
+ for (ref = remote_refs; ref; ref = ref->next) {
char old_hex[60], *new_hex;
+ int delete_ref;
+
+ if (!ref->peer_ref)
+ continue;
+
+ delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
+ if (delete_ref && !allow_deleting_refs) {
+ error("remote does not support deleting refs");
+ ret = -2;
+ continue;
+ }
+ if (!delete_ref &&
+ !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
+ if (verbose)
+ fprintf(stderr, "'%s': up-to-date\n", ref->name);
+ continue;
+ }
+
+ /* This part determines what can overwrite what.
+ * The rules are:
+ *
+ * (0) you can always use --force or +A:B notation to
+ * selectively force individual ref pairs.
+ *
+ * (1) if the old thing does not exist, it is OK.
+ *
+ * (2) if you do not have the old thing, you are not allowed
+ * to overwrite it; you would not know what you are losing
+ * otherwise.
+ *
+ * (3) if both new and old are commit-ish, and new is a
+ * descendant of old, it is OK.
+ *
+ * (4) regardless of all of the above, removing :B is
+ * always allowed.
+ */
+
+ if (!force_update &&
+ !delete_ref &&
+ !is_zero_sha1(ref->old_sha1) &&
+ !ref->force) {
+ if (!has_sha1_file(ref->old_sha1) ||
+ !ref_newer(ref->peer_ref->new_sha1,
+ ref->old_sha1)) {
+ /* We do not have the remote ref, or
+ * we know that the remote ref is not
+ * an ancestor of what we are trying to
+ * push. Either way this can be losing
+ * commits at the remote end and likely
+ * we were not up to date to begin with.
+ */
+ error("remote '%s' is not a strict "
+ "subset of local ref '%s'. "
+ "maybe you are not up-to-date and "
+ "need to pull first?",
+ ref->name,
+ ref->peer_ref->name);
+ ret = -2;
+ continue;
+ }
+ }
+ hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
+ if (!delete_ref)
+ 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);
+
+ if (ask_for_status_report) {
+ packet_write(out, "%s %s %s%c%s",
+ old_hex, new_hex, ref->name, 0,
+ "report-status");
+ ask_for_status_report = 0;
+ expect_status_report = 1;
+ }
+ else
+ packet_write(out, "%s %s %s",
+ old_hex, new_hex, ref->name);
+ if (delete_ref)
+ fprintf(stderr, "deleting '%s'\n", ref->name);
+ else {
+ fprintf(stderr, "updating '%s'", ref->name);
+ if (strcmp(ref->name, ref->peer_ref->name))
+ fprintf(stderr, " using '%s'",
+ ref->peer_ref->name);
+ fprintf(stderr, "\n from %s\n to %s\n",
+ old_hex, new_hex);
+ }
}
-
+
packet_flush(out);
- if (ref_list)
- pack_objects(out, ref_list);
+ if (new_refs)
+ pack_objects(out, remote_refs);
close(out);
- return 0;
-}
-
-/*
- * 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)
-{
- 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
- };
- while ((c = *n++) != 0) {
- if (flags[c] != 1)
- die("I don't like '%c'. Sue me.", c);
+ if (expect_status_report) {
+ if (receive_status(in))
+ ret = -4;
}
- return url;
+
+ if (!new_refs && ret == 0)
+ fprintf(stderr, "Everything up-to-date\n");
+ return ret;
}
-/*
- * Yeah, yeah, fixme. Need to pass in the heads etc.
- */
-static int setup_connection(int fd[2], char *url, char **heads)
+static void verify_remote_names(int nr_heads, char **heads)
{
- char command[1024];
- const char *host, *path;
- char *colon;
- int pipefd[2][2];
- pid_t pid;
+ int i;
- url = shell_safe(url);
- host = NULL;
- path = url;
- colon = strchr(url, ':');
- if (colon) {
- *colon = 0;
- host = url;
- path = colon+1;
+ for (i = 0; i < nr_heads; i++) {
+ const char *remote = strchr(heads[i], ':');
+
+ remote = remote ? (remote + 1) : heads[i];
+ switch (check_ref_format(remote)) {
+ case 0: /* ok */
+ case -2: /* ok but a single level -- that is fine for
+ * a match pattern.
+ */
+ continue;
+ }
+ die("remote part of refspec is not a valid name in %s",
+ heads[i]);
}
- 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");
- pid = fork();
- if (!pid) {
- 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]);
- return pid;
}
int main(int argc, char **argv)
int fd[2], ret;
pid_t pid;
+ setup_git_directory();
+ git_config(git_default_config);
+
argv++;
- for (i = 1; i < argc; i++) {
- char *arg = *argv++;
+ for (i = 1; i < argc; i++, argv++) {
+ char *arg = *argv;
if (*arg == '-') {
if (!strncmp(arg, "--exec=", 7)) {
exec = arg + 7;
continue;
}
+ if (!strcmp(arg, "--all")) {
+ send_all = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--force")) {
+ force_update = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--verbose")) {
+ verbose = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--thin")) {
+ use_thin_pack = 1;
+ continue;
+ }
usage(send_pack_usage);
}
- dest = arg;
+ if (!dest) {
+ dest = arg;
+ continue;
+ }
heads = argv;
- nr_heads = argc - i -1;
+ nr_heads = argc - i;
break;
}
if (!dest)
usage(send_pack_usage);
- pid = setup_connection(fd, dest, heads);
+ if (heads && send_all)
+ usage(send_pack_usage);
+ verify_remote_names(nr_heads, heads);
+
+ pid = git_connect(fd, dest, exec);
if (pid < 0)
return 1;
- ret = send_pack(fd[0], fd[1]);
+ ret = send_pack(fd[0], fd[1], nr_heads, heads);
close(fd[0]);
close(fd[1]);
- waitpid(pid, NULL, 0);
- return ret;
+ ret |= finish_connect(pid);
+ return !!ret;
}