When send-pack receives "shallow" lines from receive-pack, it knows
the other end does not have a complete commit chains. It restrict
itself to the commits that are not cut out by either end to make sure
the result pack is usuable by receive-pack.
The same technique here, using setup_alternate_shallow() and
--shallow-file, might simplify similar code in upload-pack.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
builtin/send-pack.c | 7 +++++--
send-pack.c | 37 ++++++++++++++++++++++++++++++++-----
send-pack.h | 4 +++-
t/t5537-push-shallow.sh | 36 ++++++++++++++++++++++++++++++++++++
transport.c | 7 +++----
5 files changed, 79 insertions(+), 12 deletions(-)
diff --git a/builtin/send-pack.c b/builtin/send-pack.c
index 7dd254f..14a73ba 100644
--- a/builtin/send-pack.c
+++ b/builtin/send-pack.c
@@ -94,6 +94,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
int fd[2];
struct child_process *conn;
struct extra_have_objects extra_have;
+ struct extra_have_objects shallow;
struct ref *remote_refs, *local_refs;
int ret;
int helper_status = 0;
@@ -209,8 +210,10 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
}
memset(&extra_have, 0, sizeof(extra_have));
+ memset(&shallow, 0, sizeof(shallow));
- get_remote_heads(fd[0], NULL, 0, &remote_refs, REF_NORMAL, &extra_have, NULL);
+ get_remote_heads(fd[0], NULL, 0, &remote_refs, REF_NORMAL,
+ &extra_have, &shallow);
transport_verify_remote_names(nr_refspecs, refspecs);
@@ -230,7 +233,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
set_ref_status_for_push(remote_refs, args.send_mirror,
args.force_update);
- ret = send_pack(&args, fd, conn, remote_refs, &extra_have);
+ ret = send_pack(&args, fd, conn, remote_refs, &extra_have, &shallow);
if (helper_status)
print_helper_status(remote_refs);
diff --git a/send-pack.c b/send-pack.c
index dcd3345..1b828b0 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -27,14 +27,19 @@ static int feed_object(const unsigned char *sha1, int fd, int negative)
/*
* Make a pack stream and spit it out into file descriptor fd
*/
-static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
+static int pack_objects(int fd, struct ref *refs,
+ struct extra_have_objects *extra,
+ struct extra_have_objects *extra_shallow,
+ struct send_pack_args *args)
{
/*
* The child becomes pack-objects --revs; we feed
* the revision parameters to it via its stdin and
* let its stdout go back to the other end.
*/
- const char *argv[] = {
+ const char *av[] = {
+ "--shallow-file",
+ NULL,
"pack-objects",
"--all-progress-implied",
"--revs",
@@ -45,10 +50,26 @@ static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *ext
NULL,
NULL,
};
+ const char **argv;
struct child_process po;
+ static struct lock_file shallow_lock;
+ const char *alternate_shallow_file = NULL;
int i;
- i = 4;
+ if (extra_shallow->nr) {
+ memset(&shallow_lock, 0, sizeof(shallow_lock));
+ /* just to load up .git/shallow if exists */
+ is_repository_shallow();
+ setup_alternate_shallow(&shallow_lock,
+ &alternate_shallow_file,
+ extra_shallow, 0);
+ av[1] = alternate_shallow_file;
+ argv = av;
+ i = 6;
+ } else {
+ argv = &av[2];
+ i = 4;
+ }
if (args->use_thin_pack)
argv[i++] = "--thin";
if (args->use_ofs_delta)
@@ -100,6 +121,10 @@ static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *ext
if (finish_command(&po))
return -1;
+
+ if (extra_shallow->nr)
+ rollback_lock_file(&shallow_lock);
+
return 0;
}
@@ -176,7 +201,8 @@ static int sideband_demux(int in, int out, void *data)
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
struct ref *remote_refs,
- struct extra_have_objects *extra_have)
+ struct extra_have_objects *extra_have,
+ struct extra_have_objects *extra_shallow)
{
int in = fd[0];
int out = fd[1];
@@ -294,7 +320,8 @@ int send_pack(struct send_pack_args *args,
}
if (new_refs && cmds_sent) {
- if (pack_objects(out, remote_refs, extra_have, args) < 0) {
+ if (pack_objects(out, remote_refs, extra_have, extra_shallow,
+ args) < 0) {
for (ref = remote_refs; ref; ref = ref->next)
ref->status = REF_STATUS_NONE;
if (args->stateless_rpc)
diff --git a/send-pack.h b/send-pack.h
index 05d7ab1..1c8a343 100644
--- a/send-pack.h
+++ b/send-pack.h
@@ -16,6 +16,8 @@ struct send_pack_args {
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
- struct ref *remote_refs, struct extra_have_objects *extra_have);
+ struct ref *remote_refs,
+ struct extra_have_objects *extra_have,
+ struct extra_have_objects *extra_shallow);
#endif
diff --git a/t/t5537-push-shallow.sh b/t/t5537-push-shallow.sh
index 37ad69b..beb85ce 100755
--- a/t/t5537-push-shallow.sh
+++ b/t/t5537-push-shallow.sh
@@ -71,4 +71,40 @@ EOF
test_cmp expect actual
'
+test_expect_success 'push from shallow to shallow' '
+ (
+ cd shallow &&
+ git push ../shallow2/.git +master:refs/remotes/shallow/master
+ ) &&
+ (
+ cd shallow2 &&
+ git log --format=%s shallow/master >actual &&
+ git fsck &&
+ cat <<EOF >expect &&
+5
+4
+3
+EOF
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'push from full to shallow' '
+ ! git --git-dir=shallow2/.git cat-file blob `echo 1|git hash-object --stdin` &&
+ commit 1 &&
+ git push shallow2/.git +master:refs/remotes/top/master &&
+ (
+ cd shallow2 &&
+ git log --format=%s top/master >actual &&
+ git fsck &&
+ cat <<EOF >expect &&
+1
+4
+3
+EOF
+ test_cmp expect actual &&
+ git cat-file blob `echo 1|git hash-object --stdin` >/dev/null
+ )
+'
+
test_done
diff --git a/transport.c b/transport.c
index f167ca5..d592e8d 100644
--- a/transport.c
+++ b/transport.c
@@ -802,11 +802,10 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
struct ref *tmp_refs;
connect_setup(transport, 1, 0);
- get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL, NULL, NULL);
+ get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
+ NULL, &data->shallow);
data->got_remote_heads = 1;
}
- if (data->shallow.nr)
- die("pushing to a shallow repository is not supported");
memset(&args, 0, sizeof(args));
args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
@@ -819,7 +818,7 @@ static int git_transport_push(struct transport *transport, struct ref *remote_re
args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
ret = send_pack(&args, data->fd, data->conn, remote_refs,
- &data->extra_have);
+ &data->extra_have, &data->shallow);
close(data->fd[1]);
close(data->fd[0]);
--
1.8.2.83.gc99314b
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