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From: Brandon Williams <bmwill@google.com>
To: git@vger.kernel.org
Cc: jonathantanmy@google.com, gitster@pobox.com, sbeller@google.com,
	Brandon Williams <bmwill@google.com>
Subject: [PATCH v3 7/8] fetch-pack: put shallow info in output parameter
Date: Wed, 20 Jun 2018 14:32:34 -0700	[thread overview]
Message-ID: <20180620213235.10952-8-bmwill@google.com> (raw)
In-Reply-To: <20180620213235.10952-1-bmwill@google.com>

Expand the transport fetch method signature, by adding an output
parameter, to allow transports to return information about the refs they
have fetched.  Then communicate shallow status information through this
mechanism instead of by modifying the input list of refs.

This does require clients to sometimes generate the ref map twice: once
from the list of refs provided by the remote (as is currently done) and
potentially once from the new list of refs that the fetch mechanism
provides.

Signed-off-by: Brandon Williams <bmwill@google.com>
---
 builtin/clone.c      |  4 ++--
 builtin/fetch.c      | 28 ++++++++++++++++++++++++----
 fetch-object.c       |  2 +-
 fetch-pack.c         | 17 +++++++++--------
 transport-helper.c   |  6 ++++--
 transport-internal.h |  9 ++++++++-
 transport.c          | 34 ++++++++++++++++++++++++++++------
 transport.h          |  3 ++-
 8 files changed, 78 insertions(+), 25 deletions(-)

diff --git a/builtin/clone.c b/builtin/clone.c
index 99e73dae8..8f86d99c5 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -1155,7 +1155,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 			}
 
 		if (!is_local && !complete_refs_before_fetch)
-			transport_fetch_refs(transport, mapped_refs);
+			transport_fetch_refs(transport, mapped_refs, NULL);
 
 		remote_head = find_ref_by_name(refs, "HEAD");
 		remote_head_points_at =
@@ -1197,7 +1197,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (is_local)
 		clone_local(path, git_dir);
 	else if (refs && complete_refs_before_fetch)
-		transport_fetch_refs(transport, mapped_refs);
+		transport_fetch_refs(transport, mapped_refs, NULL);
 
 	update_remote_refs(refs, mapped_refs, remote_head_points_at,
 			   branch_top.buf, reflog_msg.buf, transport,
diff --git a/builtin/fetch.c b/builtin/fetch.c
index b600e1f10..8362a97a2 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -946,11 +946,13 @@ static int quickfetch(struct ref *ref_map)
 	return check_connected(iterate_ref_map, &rm, &opt);
 }
 
-static int fetch_refs(struct transport *transport, struct ref *ref_map)
+static int fetch_refs(struct transport *transport, struct ref *ref_map,
+		      struct ref **updated_remote_refs)
 {
 	int ret = quickfetch(ref_map);
 	if (ret)
-		ret = transport_fetch_refs(transport, ref_map);
+		ret = transport_fetch_refs(transport, ref_map,
+					   updated_remote_refs);
 	if (ret)
 		transport_unlock_pack(transport);
 	return ret;
@@ -1106,7 +1108,7 @@ static void backfill_tags(struct transport *transport, struct ref *ref_map)
 	transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
 	transport_set_option(transport, TRANS_OPT_DEPTH, "0");
 	transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
-	if (!fetch_refs(transport, ref_map))
+	if (!fetch_refs(transport, ref_map, NULL))
 		consume_refs(transport, ref_map);
 
 	if (gsecondary) {
@@ -1122,6 +1124,7 @@ static int do_fetch(struct transport *transport,
 	int autotags = (transport->remote->fetch_tags == 1);
 	int retcode = 0;
 	const struct ref *remote_refs;
+	struct ref *updated_remote_refs = NULL;
 	struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
 
 	if (tags == TAGS_DEFAULT) {
@@ -1172,7 +1175,24 @@ static int do_fetch(struct transport *transport,
 				   transport->url);
 		}
 	}
-	if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
+
+	if (fetch_refs(transport, ref_map, &updated_remote_refs)) {
+		free_refs(ref_map);
+		retcode = 1;
+		goto cleanup;
+	}
+	if (updated_remote_refs) {
+		/*
+		 * Regenerate ref_map using the updated remote refs.  This is
+		 * to account for additional information which may be provided
+		 * by the transport (e.g. shallow info).
+		 */
+		free_refs(ref_map);
+		ref_map = get_ref_map(transport->remote, updated_remote_refs, rs,
+				      tags, &autotags);
+		free_refs(updated_remote_refs);
+	}
+	if (consume_refs(transport, ref_map)) {
 		free_refs(ref_map);
 		retcode = 1;
 		goto cleanup;
diff --git a/fetch-object.c b/fetch-object.c
index 853624f81..48fe63dd6 100644
--- a/fetch-object.c
+++ b/fetch-object.c
@@ -19,7 +19,7 @@ static void fetch_refs(const char *remote_name, struct ref *ref)
 
 	transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
 	transport_set_option(transport, TRANS_OPT_NO_DEPENDENTS, "1");
-	transport_fetch_refs(transport, ref);
+	transport_fetch_refs(transport, ref, NULL);
 	fetch_if_missing = original_fetch_if_missing;
 }
 
diff --git a/fetch-pack.c b/fetch-pack.c
index a320ce987..f1709e816 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -1470,12 +1470,13 @@ static int remove_duplicates_in_refs(struct ref **ref, int nr)
 }
 
 static void update_shallow(struct fetch_pack_args *args,
-			   struct ref **sought, int nr_sought,
+			   struct ref *refs,
 			   struct shallow_info *si)
 {
 	struct oid_array ref = OID_ARRAY_INIT;
 	int *status;
-	int i;
+	int i = 0;
+	struct ref *r;
 
 	if (args->deepen && alternate_shallow_file) {
 		if (*alternate_shallow_file == '\0') { /* --unshallow */
@@ -1517,8 +1518,8 @@ static void update_shallow(struct fetch_pack_args *args,
 	remove_nonexistent_theirs_shallow(si);
 	if (!si->nr_ours && !si->nr_theirs)
 		return;
-	for (i = 0; i < nr_sought; i++)
-		oid_array_append(&ref, &sought[i]->old_oid);
+	for (r = refs; r; r = r->next)
+		oid_array_append(&ref, &r->old_oid);
 	si->ref = &ref;
 
 	if (args->update_shallow) {
@@ -1552,12 +1553,12 @@ static void update_shallow(struct fetch_pack_args *args,
 	 * remote is also shallow, check what ref is safe to update
 	 * without updating .git/shallow
 	 */
-	status = xcalloc(nr_sought, sizeof(*status));
+	status = xcalloc(ref.nr, sizeof(*status));
 	assign_shallow_commits_to_refs(si, NULL, status);
 	if (si->nr_ours || si->nr_theirs) {
-		for (i = 0; i < nr_sought; i++)
+		for (r = refs, i = 0; r; r = r->next, i++)
 			if (status[i])
-				sought[i]->status = REF_STATUS_REJECT_SHALLOW;
+				r->status = REF_STATUS_REJECT_SHALLOW;
 	}
 	free(status);
 	oid_array_clear(&ref);
@@ -1591,7 +1592,7 @@ struct ref *fetch_pack(struct fetch_pack_args *args,
 		ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought,
 					&si, pack_lockfile);
 	reprepare_packed_git(the_repository);
-	update_shallow(args, sought, nr_sought, &si);
+	update_shallow(args, ref_cpy, &si);
 	clear_shallow_info(&si);
 	return ref_cpy;
 }
diff --git a/transport-helper.c b/transport-helper.c
index 1f8ff7e94..8b5abca29 100644
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -651,14 +651,16 @@ static int connect_helper(struct transport *transport, const char *name,
 }
 
 static int fetch(struct transport *transport,
-		 int nr_heads, struct ref **to_fetch)
+		 int nr_heads, struct ref **to_fetch,
+		 struct ref **fetched_refs)
 {
 	struct helper_data *data = transport->data;
 	int i, count;
 
 	if (process_connect(transport, 0)) {
 		do_take_over(transport);
-		return transport->vtable->fetch(transport, nr_heads, to_fetch);
+		return transport->vtable->fetch(transport, nr_heads, to_fetch,
+						fetched_refs);
 	}
 
 	count = 0;
diff --git a/transport-internal.h b/transport-internal.h
index 1cde6258a..eeb6c340e 100644
--- a/transport-internal.h
+++ b/transport-internal.h
@@ -36,11 +36,18 @@ struct transport_vtable {
 	 * Fetch the objects for the given refs. Note that this gets
 	 * an array, and should ignore the list structure.
 	 *
+	 * The transport *may* provide, in fetched_refs, the list of refs that
+	 * it fetched.  If the transport knows anything about the fetched refs
+	 * that the caller does not know (for example, shallow status), it
+	 * should provide that list of refs and include that information in the
+	 * list.
+	 *
 	 * If the transport did not get hashes for refs in
 	 * get_refs_list(), it should set the old_sha1 fields in the
 	 * provided refs now.
 	 **/
-	int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
+	int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs,
+		     struct ref **fetched_refs);
 
 	/**
 	 * Push the objects and refs. Send the necessary objects, and
diff --git a/transport.c b/transport.c
index a32da30de..39d8c2fa5 100644
--- a/transport.c
+++ b/transport.c
@@ -151,7 +151,8 @@ static struct ref *get_refs_from_bundle(struct transport *transport,
 }
 
 static int fetch_refs_from_bundle(struct transport *transport,
-			       int nr_heads, struct ref **to_fetch)
+			       int nr_heads, struct ref **to_fetch,
+			       struct ref **fetched_refs)
 {
 	struct bundle_transport_data *data = transport->data;
 	return unbundle(&data->header, data->fd,
@@ -287,7 +288,8 @@ static struct ref *get_refs_via_connect(struct transport *transport, int for_pus
 }
 
 static int fetch_refs_via_pack(struct transport *transport,
-			       int nr_heads, struct ref **to_fetch)
+			       int nr_heads, struct ref **to_fetch,
+			       struct ref **fetched_refs)
 {
 	int ret = 0;
 	struct git_transport_data *data = transport->data;
@@ -354,8 +356,12 @@ static int fetch_refs_via_pack(struct transport *transport,
 	if (report_unmatched_refs(to_fetch, nr_heads))
 		ret = -1;
 
+	if (fetched_refs)
+		*fetched_refs = refs;
+	else
+		free_refs(refs);
+
 	free_refs(refs_tmp);
-	free_refs(refs);
 	free(dest);
 	return ret;
 }
@@ -1215,19 +1221,31 @@ const struct ref *transport_get_remote_refs(struct transport *transport,
 	return transport->remote_refs;
 }
 
-int transport_fetch_refs(struct transport *transport, struct ref *refs)
+int transport_fetch_refs(struct transport *transport, struct ref *refs,
+			 struct ref **fetched_refs)
 {
 	int rc;
 	int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 	struct ref **heads = NULL;
+	struct ref *nop_head = NULL, **nop_tail = &nop_head;
 	struct ref *rm;
 
 	for (rm = refs; rm; rm = rm->next) {
 		nr_refs++;
 		if (rm->peer_ref &&
 		    !is_null_oid(&rm->old_oid) &&
-		    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
+		    !oidcmp(&rm->peer_ref->old_oid, &rm->old_oid)) {
+			/*
+			 * These need to be reported as fetched, but we don't
+			 * actually need to fetch them.
+			 */
+			if (fetched_refs) {
+				struct ref *nop_ref = copy_ref(rm);
+				*nop_tail = nop_ref;
+				nop_tail = &nop_ref->next;
+			}
 			continue;
+		}
 		ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
 		heads[nr_heads++] = rm;
 	}
@@ -1245,7 +1263,11 @@ int transport_fetch_refs(struct transport *transport, struct ref *refs)
 			heads[nr_heads++] = rm;
 	}
 
-	rc = transport->vtable->fetch(transport, nr_heads, heads);
+	rc = transport->vtable->fetch(transport, nr_heads, heads, fetched_refs);
+	if (fetched_refs && nop_head) {
+		*nop_tail = *fetched_refs;
+		*fetched_refs = nop_head;
+	}
 
 	free(heads);
 	return rc;
diff --git a/transport.h b/transport.h
index 7792b0858..3dff767a8 100644
--- a/transport.h
+++ b/transport.h
@@ -218,7 +218,8 @@ int transport_push(struct transport *connection,
 const struct ref *transport_get_remote_refs(struct transport *transport,
 					    const struct argv_array *ref_prefixes);
 
-int transport_fetch_refs(struct transport *transport, struct ref *refs);
+int transport_fetch_refs(struct transport *transport, struct ref *refs,
+			 struct ref **fetched_refs);
 void transport_unlock_pack(struct transport *transport);
 int transport_disconnect(struct transport *transport);
 char *transport_anonymize_url(const char *url);
-- 
2.18.0.rc1.244.gcf134e6275-goog


  parent reply	other threads:[~2018-06-20 21:33 UTC|newest]

Thread overview: 122+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-05 17:51 [PATCH 0/8] ref-in-want Brandon Williams
2018-06-05 17:51 ` [PATCH 1/8] test-pkt-line: add unpack-sideband subcommand Brandon Williams
2018-06-05 17:51 ` [PATCH 2/8] upload-pack: implement ref-in-want Brandon Williams
2018-06-05 19:11   ` Ramsay Jones
2018-06-05 20:32   ` Ævar Arnfjörð Bjarmason
2018-06-06 21:32     ` Brandon Williams
2018-06-06 22:42       ` Ævar Arnfjörð Bjarmason
2018-06-06 22:45         ` Brandon Williams
2018-06-05 17:51 ` [PATCH 3/8] upload-pack: test negotiation with changing repository Brandon Williams
2018-06-05 17:51 ` [PATCH 4/8] fetch: refactor the population of peer ref OIDs Brandon Williams
2018-06-05 17:51 ` [PATCH 5/8] fetch: refactor fetch_refs into two functions Brandon Williams
2018-06-05 17:51 ` [PATCH 6/8] fetch: refactor to make function args narrower Brandon Williams
2018-06-05 17:51 ` [PATCH 7/8] fetch-pack: put shallow info in output parameter Brandon Williams
2018-06-05 17:51 ` [PATCH 8/8] fetch-pack: implement ref-in-want Brandon Williams
2018-06-13 21:39 ` [PATCH v2 0/8] ref-in-want Brandon Williams
2018-06-13 21:39   ` [PATCH v2 1/8] test-pkt-line: add unpack-sideband subcommand Brandon Williams
2018-06-14 18:09     ` Stefan Beller
2018-06-14 19:21       ` Brandon Williams
2018-06-13 21:39   ` [PATCH v2 2/8] upload-pack: implement ref-in-want Brandon Williams
2018-06-14 18:40     ` Stefan Beller
2018-06-14 18:52       ` Brandon Williams
2018-06-15 21:08     ` Junio C Hamano
2018-06-15 21:14       ` Junio C Hamano
2018-06-19 18:50       ` Brandon Williams
2018-06-19 20:37         ` Junio C Hamano
2018-06-19 23:14           ` Brandon Williams
2018-06-21 16:38             ` Junio C Hamano
2018-06-13 21:39   ` [PATCH v2 3/8] upload-pack: test negotiation with changing repository Brandon Williams
2018-06-14 19:23     ` Stefan Beller
2018-06-13 21:39   ` [PATCH v2 4/8] fetch: refactor the population of peer ref OIDs Brandon Williams
2018-06-13 21:39   ` [PATCH v2 5/8] fetch: refactor fetch_refs into two functions Brandon Williams
2018-06-13 21:39   ` [PATCH v2 6/8] fetch: refactor to make function args narrower Brandon Williams
2018-06-14 19:32     ` Stefan Beller
2018-06-13 21:39   ` [PATCH v2 7/8] fetch-pack: put shallow info in output parameter Brandon Williams
2018-06-14 19:42     ` Stefan Beller
2018-06-14 23:59     ` Jonathan Tan
2018-06-19 17:41       ` Brandon Williams
2018-06-13 21:39   ` [PATCH v2 8/8] fetch-pack: implement ref-in-want Brandon Williams
2018-06-14 19:56     ` Stefan Beller
2018-06-14 21:18       ` Brandon Williams
2018-06-22 22:29         ` Jonathan Nieder
2018-06-15 21:20   ` [PATCH v2 0/8] ref-in-want Junio C Hamano
2018-06-18 18:05     ` Brandon Williams
2018-06-20 21:32   ` [PATCH v3 " Brandon Williams
2018-06-20 21:32     ` [PATCH v3 1/8] test-pkt-line: add unpack-sideband subcommand Brandon Williams
2018-06-22 21:12       ` Jonathan Nieder
2018-06-20 21:32     ` [PATCH v3 2/8] upload-pack: implement ref-in-want Brandon Williams
2018-06-25 17:40       ` Jonathan Tan
2018-06-25 18:09       ` Jonathan Tan
2018-06-25 18:20         ` Brandon Williams
2018-06-20 21:32     ` [PATCH v3 3/8] upload-pack: test negotiation with changing repository Brandon Williams
2018-06-20 21:32     ` [PATCH v3 4/8] fetch: refactor the population of peer ref OIDs Brandon Williams
2018-06-25 17:45       ` Jonathan Tan
2018-06-20 21:32     ` [PATCH v3 5/8] fetch: refactor fetch_refs into two functions Brandon Williams
2018-06-22 21:26       ` Jonathan Nieder
2018-06-22 21:42       ` Jonathan Nieder
2018-06-20 21:32     ` [PATCH v3 6/8] fetch: refactor to make function args narrower Brandon Williams
2018-06-20 21:32     ` Brandon Williams [this message]
2018-06-25 18:03       ` [PATCH v3 7/8] fetch-pack: put shallow info in output parameter Jonathan Tan
2018-06-25 18:18         ` Brandon Williams
2018-06-20 21:32     ` [PATCH v3 8/8] fetch-pack: implement ref-in-want Brandon Williams
2018-06-22 23:01       ` Jonathan Nieder
2018-06-25 18:08         ` Brandon Williams
2018-06-25 18:53     ` [PATCH v4 0/8] ref-in-want Brandon Williams
2018-06-25 18:53       ` [PATCH v4 1/8] test-pkt-line: add unpack-sideband subcommand Brandon Williams
2018-06-25 18:53       ` [PATCH v4 2/8] upload-pack: implement ref-in-want Brandon Williams
2018-06-25 18:53       ` [PATCH v4 3/8] upload-pack: test negotiation with changing repository Brandon Williams
2018-06-25 22:27         ` Jonathan Tan
2018-06-25 18:53       ` [PATCH v4 4/8] fetch: refactor the population of peer ref OIDs Brandon Williams
2018-06-25 18:53       ` [PATCH v4 5/8] fetch: refactor fetch_refs into two functions Brandon Williams
2018-06-25 18:53       ` [PATCH v4 6/8] fetch: refactor to make function args narrower Brandon Williams
2018-06-25 22:36         ` Jonathan Tan
2018-06-25 18:53       ` [PATCH v4 7/8] fetch-pack: put shallow info in output parameter Brandon Williams
2018-06-25 18:53       ` [PATCH v4 8/8] fetch-pack: implement ref-in-want Brandon Williams
2018-06-25 23:03       ` [PATCH v4 0/8] ref-in-want Jonathan Tan
2018-06-26 20:54       ` [PATCH v5 " Brandon Williams
2018-06-26 20:54         ` [PATCH v5 1/8] test-pkt-line: add unpack-sideband subcommand Brandon Williams
2018-06-26 20:54         ` [PATCH v5 2/8] upload-pack: implement ref-in-want Brandon Williams
2018-06-26 21:25           ` Junio C Hamano
2018-06-27 18:05             ` Brandon Williams
2018-06-27 18:53               ` Junio C Hamano
2018-06-27 20:46                 ` Brandon Williams
2018-06-27 20:59                   ` Stefan Beller
2018-06-27 18:06             ` Jonathan Tan
2018-06-26 20:54         ` [PATCH v5 3/8] upload-pack: test negotiation with changing repository Brandon Williams
2018-06-26 21:34           ` Junio C Hamano
2018-06-27 18:09             ` Brandon Williams
2018-06-27 17:58           ` Jonathan Tan
2018-06-26 20:54         ` [PATCH v5 4/8] fetch: refactor the population of peer ref OIDs Brandon Williams
2018-06-26 20:54         ` [PATCH v5 5/8] fetch: refactor fetch_refs into two functions Brandon Williams
2018-06-26 20:54         ` [PATCH v5 6/8] fetch: refactor to make function args narrower Brandon Williams
2018-06-26 21:40           ` Junio C Hamano
2018-06-26 20:54         ` [PATCH v5 7/8] fetch-pack: put shallow info in output parameter Brandon Williams
2018-06-26 21:42           ` Junio C Hamano
2018-06-27 18:15             ` Brandon Williams
2018-06-26 20:54         ` [PATCH v5 8/8] fetch-pack: implement ref-in-want Brandon Williams
2018-06-27 18:09           ` Jonathan Tan
2018-06-27 18:18             ` Brandon Williams
2018-06-27 22:30         ` [PATCH v6 0/8] ref-in-want Brandon Williams
2018-06-27 22:30           ` [PATCH v6 1/8] test-pkt-line: add unpack-sideband subcommand Brandon Williams
2018-06-27 22:30           ` [PATCH v6 2/8] upload-pack: implement ref-in-want Brandon Williams
2018-06-27 22:30           ` [PATCH v6 3/8] upload-pack: test negotiation with changing repository Brandon Williams
2018-06-27 22:30           ` [PATCH v6 4/8] fetch: refactor the population of peer ref OIDs Brandon Williams
2018-06-27 22:30           ` [PATCH v6 5/8] fetch: refactor fetch_refs into two functions Brandon Williams
2018-06-27 22:30           ` [PATCH v6 6/8] fetch: refactor to make function args narrower Brandon Williams
2018-06-27 22:30           ` [PATCH v6 7/8] fetch-pack: put shallow info in output parameter Brandon Williams
2018-06-27 22:30           ` [PATCH v6 8/8] fetch-pack: implement ref-in-want Brandon Williams
2018-07-22  9:20             ` Duy Nguyen
2018-07-23 17:53               ` Brandon Williams
2018-07-23 18:13                 ` Duy Nguyen
2018-07-23 21:28                   ` Jonathan Nieder
2018-07-23 17:56               ` [PATCH] fetch-pack: mark die strings for translation Brandon Williams
2018-07-23 18:14                 ` Stefan Beller
2018-07-23 21:29                 ` Jonathan Nieder
2018-07-23 22:57                 ` Junio C Hamano
2018-07-23 22:59                   ` Junio C Hamano
2018-07-23 23:00                     ` Brandon Williams
2018-06-15 19:04 ` [PATCH 0/8] ref-in-want Jonathan Tan
2018-06-19 17:32   ` Brandon Williams
2018-06-19 19:23     ` Jonathan Tan
2018-06-19 23:16   ` Brandon Williams
2018-06-19 23:38     ` Jonathan Tan

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