#include "cache.h"
+#include "refs.h"
#include "pkt-line.h"
+#include "commit.h"
+#include "tag.h"
+#include <time.h>
+#include <sys/wait.h>
-static const char fetch_pack_usage[] = "git-fetch-pack [host:]directory [heads]* < mycommitlist";
+static int quiet;
+static int verbose;
+static const char fetch_pack_usage[] =
+"git-fetch-pack [-q] [-v] [--exec=upload-pack] [host:]directory <refs>...";
static const char *exec = "git-upload-pack";
-static int get_ack(int fd, unsigned char *result_sha1)
+#define COMPLETE (1U << 0)
+
+static int find_common(int fd[2], unsigned char *result_sha1,
+ struct ref *refs)
{
+ int fetching;
static char line[1000];
- int len = packet_read_line(fd, line, sizeof(line));
+ static char rev_command[1024];
+ int count = 0, flushes = 0, retval, rev_command_len;
+ FILE *revs;
- if (!len)
- die("git-fetch-pack: expected ACK/NAK, got EOF");
- if (line[len-1] == '\n')
- line[--len] = 0;
- if (!strcmp(line, "NAK"))
- return 0;
- if (!strncmp(line, "ACK ", 3)) {
- if (!get_sha1_hex(line+4, result_sha1))
- return 1;
+ strcpy(rev_command, "git-rev-list $(git-rev-parse --all)");
+ rev_command_len = strlen(rev_command);
+ fetching = 0;
+ for ( ; refs ; refs = refs->next) {
+ unsigned char *remote = refs->old_sha1;
+ struct object *o;
+
+ /*
+ * If that object is complete (i.e. it is an ancestor of a
+ * local ref), we tell them we have it but do not have to
+ * tell them about its ancestors, which they already know
+ * about.
+ *
+ * We use lookup_object here because we are only
+ * interested in the case we *know* the object is
+ * reachable and we have already scanned it.
+ */
+ if (((o = lookup_object(remote)) != NULL) &&
+ (o->flags & COMPLETE)) {
+ struct commit_list *p;
+ struct commit *commit =
+ (struct commit *) (o = deref_tag(o));
+ if (!o)
+ goto repair;
+ if (o->type != commit_type)
+ continue;
+ p = commit->parents;
+ while (p &&
+ rev_command_len + 44 < sizeof(rev_command)) {
+ snprintf(rev_command + rev_command_len, 44,
+ " ^%s",
+ sha1_to_hex(p->item->object.sha1));
+ rev_command_len += 43;
+ p = p->next;
+ }
+ continue;
+ }
+ repair:
+ packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
+ fetching++;
}
- die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
-}
+ packet_flush(fd[1]);
+ if (!fetching)
+ return 1;
-static int find_common(int fd[2], unsigned char *result_sha1)
-{
- static char line[1000];
- int count = 0, flushes = 0;
+ revs = popen(rev_command, "r");
+ if (!revs)
+ die("unable to run 'git-rev-list'");
- while (fgets(line, sizeof(line), stdin) != NULL) {
+ flushes = 1;
+ retval = -1;
+ while (fgets(line, sizeof(line), revs) != NULL) {
unsigned char sha1[20];
if (get_sha1_hex(line, sha1))
die("git-fetch-pack: expected object name, got crud");
packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
+ if (verbose)
+ fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
if (!(31 & ++count)) {
packet_flush(fd[1]);
flushes++;
*/
if (count == 32)
continue;
- if (get_ack(fd[0], result_sha1))
- return 0;
+ if (get_ack(fd[0], result_sha1)) {
+ flushes = 0;
+ retval = 0;
+ if (verbose)
+ fprintf(stderr, "got ack\n");
+ break;
+ }
flushes--;
}
}
- flushes++;
- packet_flush(fd[1]);
+ pclose(revs);
+ packet_write(fd[1], "done\n");
+ if (verbose)
+ fprintf(stderr, "done\n");
while (flushes) {
flushes--;
- if (get_ack(fd[0], result_sha1))
+ if (get_ack(fd[0], result_sha1)) {
+ if (verbose)
+ fprintf(stderr, "got ack\n");
return 0;
+ }
}
- return -1;
+ return retval;
}
-static int get_remote_heads(int fd, int nr_match, char **match)
+static struct commit_list *complete = NULL;
+
+static int mark_complete(const char *path, const unsigned char *sha1)
{
- for (;;) {
- static char line[1000];
- unsigned char sha1[20];
- char *refname;
- int len;
-
- len = packet_read_line(fd, line, sizeof(line));
- if (!len)
- break;
- if (line[len-1] == '\n')
- line[--len] = 0;
- if (len < 42 || get_sha1_hex(line, sha1))
- die("git-fetch-pack: protocol error - expected ref descriptor, got '%sä'", line);
- refname = line+41;
- if (nr_match && !path_match(refname, nr_match, match))
- continue;
- printf("%s %s\n", sha1_to_hex(sha1), refname);
+ struct object *o = parse_object(sha1);
+
+ while (o && o->type == tag_type) {
+ struct tag *t = (struct tag *) o;
+ if (!t->tagged)
+ break; /* broken repository */
+ o->flags |= COMPLETE;
+ o = parse_object(t->tagged->sha1);
+ }
+ if (o && o->type == commit_type) {
+ struct commit *commit = (struct commit *)o;
+ commit->object.flags |= COMPLETE;
+ insert_by_date(commit, &complete);
}
return 0;
}
+static void mark_recent_complete_commits(unsigned long cutoff)
+{
+ while (complete && cutoff <= complete->item->date) {
+ if (verbose)
+ fprintf(stderr, "Marking %s as complete\n",
+ sha1_to_hex(complete->item->object.sha1));
+ pop_most_recent_commit(&complete, COMPLETE);
+ }
+}
+
+static int everything_local(struct ref *refs)
+{
+ struct ref *ref;
+ int retval;
+ unsigned long cutoff = 0;
+
+ track_object_refs = 0;
+ save_commit_buffer = 0;
+
+ for (ref = refs; ref; ref = ref->next) {
+ struct object *o;
+
+ o = parse_object(ref->old_sha1);
+ if (!o)
+ continue;
+
+ /* We already have it -- which may mean that we were
+ * in sync with the other side at some time after
+ * that (it is OK if we guess wrong here).
+ */
+ if (o->type == commit_type) {
+ struct commit *commit = (struct commit *)o;
+ if (!cutoff || cutoff < commit->date)
+ cutoff = commit->date;
+ }
+ }
+
+ for_each_ref(mark_complete);
+ if (cutoff)
+ mark_recent_complete_commits(cutoff);
+
+ for (retval = 1; refs ; refs = refs->next) {
+ const unsigned char *remote = refs->old_sha1;
+ unsigned char local[20];
+ struct object *o;
+
+ o = parse_object(remote);
+ if (!o || !(o->flags & COMPLETE)) {
+ retval = 0;
+ if (!verbose)
+ continue;
+ fprintf(stderr,
+ "want %s (%s)\n", sha1_to_hex(remote),
+ refs->name);
+ continue;
+ }
+
+ memcpy(refs->new_sha1, local, 20);
+ if (!verbose)
+ continue;
+ fprintf(stderr,
+ "already have %s (%s)\n", sha1_to_hex(remote),
+ refs->name);
+ }
+ return retval;
+}
+
static int fetch_pack(int fd[2], int nr_match, char **match)
{
+ struct ref *ref;
unsigned char sha1[20];
+ int status;
+ pid_t pid;
- get_remote_heads(fd[0], nr_match, match);
- if (find_common(fd, sha1) < 0)
- die("git-fetch-pack: no common commits");
- printf("common commit: %s\n", sha1_to_hex(sha1));
- return 0;
+ get_remote_heads(fd[0], &ref, nr_match, match, 1);
+ if (!ref) {
+ packet_flush(fd[1]);
+ die("no matching remote head");
+ }
+ if (everything_local(ref)) {
+ packet_flush(fd[1]);
+ goto all_done;
+ }
+ if (find_common(fd, sha1, ref) < 0)
+ fprintf(stderr, "warning: no common commits\n");
+ pid = fork();
+ if (pid < 0)
+ die("git-fetch-pack: unable to fork off git-unpack-objects");
+ if (!pid) {
+ dup2(fd[0], 0);
+ close(fd[0]);
+ close(fd[1]);
+ execlp("git-unpack-objects", "git-unpack-objects",
+ quiet ? "-q" : NULL, NULL);
+ die("git-unpack-objects exec failed");
+ }
+ close(fd[0]);
+ close(fd[1]);
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno != EINTR)
+ die("waiting for git-unpack-objects: %s", strerror(errno));
+ }
+ if (WIFEXITED(status)) {
+ int code = WEXITSTATUS(status);
+ if (code)
+ die("git-unpack-objects died with error code %d", code);
+all_done:
+ while (ref) {
+ printf("%s %s\n",
+ sha1_to_hex(ref->old_sha1), ref->name);
+ ref = ref->next;
+ }
+ return 0;
+ }
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+ die("git-unpack-objects died of signal %d", sig);
+ }
+ die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
}
int main(int argc, char **argv)
char *arg = argv[i];
if (*arg == '-') {
- /* Arguments go here */
+ if (!strncmp("--exec=", arg, 7)) {
+ exec = arg + 7;
+ continue;
+ }
+ if (!strcmp("-q", arg)) {
+ quiet = 1;
+ continue;
+ }
+ if (!strcmp("-v", arg)) {
+ verbose = 1;
+ continue;
+ }
usage(fetch_pack_usage);
}
dest = arg;
projects / git.git / blobdiff