#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
+#include "commit.h"
+#include "tag.h"
+#include <time.h>
#include <sys/wait.h>
static int quiet;
"git-fetch-pack [-q] [-v] [--exec=upload-pack] [host:]directory <refs>...";
static const char *exec = "git-upload-pack";
+#define COMPLETE (1U << 0)
+#define COMMON (1U << 1)
+#define COMMON_REF (1U << 2 | COMMON)
+#define SEEN (1U << 3)
+#define POPPED (1U << 4)
+
+static struct commit_list *rev_list = NULL;
+static struct commit_list *rev_list_end = NULL;
+static unsigned long non_common_revs = 0;
+
+static void rev_list_append(struct commit *commit, int mark)
+{
+ if (!(commit->object.flags & mark)) {
+ commit->object.flags |= mark;
+
+ if (rev_list == NULL) {
+ commit_list_insert(commit, &rev_list);
+ rev_list_end = rev_list;
+ } else {
+ commit_list_insert(commit, &(rev_list_end->next));
+ rev_list_end = rev_list_end->next;
+ }
+
+ if (!(commit->object.flags & COMMON))
+ non_common_revs++;
+ }
+}
+
+static int rev_list_append_sha1(const char *path, const unsigned char *sha1)
+{
+ struct object *o = deref_tag(parse_object(sha1));
+
+ if (o->type == commit_type)
+ rev_list_append((struct commit *)o, SEEN);
+
+ return 0;
+}
+
+static void mark_common(struct commit *commit)
+{
+ if (commit != NULL && !(commit->object.flags & COMMON)) {
+ struct object *o = (struct object *)commit;
+ o->flags |= COMMON;
+ if (!(o->flags & SEEN))
+ rev_list_append(commit, SEEN);
+ else {
+ struct commit_list *parents;
+
+ if (!(o->flags & POPPED))
+ non_common_revs--;
+ if (!o->parsed)
+ parse_commit(commit);
+ for (parents = commit->parents;
+ parents;
+ parents = parents->next)
+ mark_common(parents->item);
+ }
+ }
+}
+
+/*
+ Get the next rev to send, ignoring the common.
+*/
+
+static const unsigned char* get_rev()
+{
+ struct commit *commit = NULL;
+
+ while (commit == NULL) {
+ unsigned int mark;
+ struct commit_list* parents;
+
+ if (rev_list == NULL || non_common_revs == 0)
+ return NULL;
+
+ commit = rev_list->item;
+ if (!(commit->object.parsed))
+ parse_commit(commit);
+ commit->object.flags |= POPPED;
+ if (!(commit->object.flags & COMMON))
+ non_common_revs--;
+
+ parents = commit->parents;
+
+ if (commit->object.flags & COMMON) {
+ /* do not send "have", and ignore ancestors */
+ commit = NULL;
+ mark = COMMON | SEEN;
+ } else if (commit->object.flags & COMMON_REF)
+ /* send "have", and ignore ancestors */
+ mark = COMMON | SEEN;
+ else
+ /* send "have", also for its ancestors */
+ mark = SEEN;
+
+ while (parents) {
+ if (mark & COMMON)
+ mark_common(parents->item);
+ else
+ rev_list_append(parents->item, mark);
+ parents = parents->next;
+ }
+
+ rev_list = rev_list->next;
+ }
+
+ return commit->object.sha1;
+}
+
static int find_common(int fd[2], unsigned char *result_sha1,
struct ref *refs)
{
- static char line[1000];
- int count = 0, flushes = 0, retval;
- FILE *revs;
+ int fetching;
+ int count = 0, flushes = 0, multi_ack = 0, retval;
+ const unsigned char *sha1;
- revs = popen("git-rev-list $(git-rev-parse --all)", "r");
- if (!revs)
- die("unable to run 'git-rev-list'");
+ for_each_ref(rev_list_append_sha1);
- while (refs) {
+ fetching = 0;
+ for ( ; refs ; refs = refs->next) {
unsigned char *remote = refs->old_sha1;
- if (verbose)
- fprintf(stderr,
- "want %s (%s)\n", sha1_to_hex(remote),
- refs->name);
- packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
- refs = refs->next;
+ 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)) {
+ o = deref_tag(o);
+
+ if (o->type == commit_type)
+ rev_list_append((struct commit *)o,
+ COMMON_REF | SEEN);
+
+ continue;
+ }
+
+ packet_write(fd[1], "want %s multi_ack\n", sha1_to_hex(remote));
+ fetching++;
}
packet_flush(fd[1]);
- flushes = 1;
+ if (!fetching)
+ return 1;
+
+ flushes = 0;
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");
+ while ((sha1 = get_rev())) {
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)) {
+ int ack;
+
packet_flush(fd[1]);
flushes++;
*/
if (count == 32)
continue;
- if (get_ack(fd[0], result_sha1)) {
- flushes = 0;
- retval = 0;
- if (verbose)
- fprintf(stderr, "got ack\n");
- break;
- }
+
+ do {
+ ack = get_ack(fd[0], result_sha1);
+ if (verbose && ack)
+ fprintf(stderr, "got ack %d %s\n", ack,
+ sha1_to_hex(result_sha1));
+ if (ack == 1) {
+ if (!multi_ack)
+ flushes = 0;
+ retval = 0;
+ goto done;
+ } else if (ack == 2) {
+ multi_ack = 1;
+ mark_common((struct commit *)
+ lookup_object(result_sha1));
+ retval = 0;
+ }
+ } while(ack);
flushes--;
}
}
- pclose(revs);
+done:
+ if (multi_ack) {
+ packet_flush(fd[1]);
+ flushes++;
+ }
packet_write(fd[1], "done\n");
if (verbose)
fprintf(stderr, "done\n");
+ if (retval != 0)
+ flushes++;
while (flushes) {
- flushes--;
if (get_ack(fd[0], result_sha1)) {
if (verbose)
- fprintf(stderr, "got ack\n");
- return 0;
+ fprintf(stderr, "got ack %s\n",
+ sha1_to_hex(result_sha1));
+ if (!multi_ack)
+ return 0;
+ retval = 0;
+ continue;
}
+ flushes--;
+ }
+ return retval;
+}
+
+static struct commit_list *complete = NULL;
+
+static int mark_complete(const char *path, const unsigned char *sha1)
+{
+ 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;
}
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();
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);
projects / git.git / blobdiff