[PATCH v4 10/11] bundle-uri: quiet failed unbundlings

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From: Derrick Stolee <derrickstolee@xxxxxxxxxx>

When downloading a list of bundles in "all" mode, Git has no
understanding of the dependencies between the bundles. Git attempts to
unbundle the bundles in some order, but some may not pass the
verify_bundle() step because of missing prerequisites. This is passed as
error messages to the user, even when they eventually succeed in later
attempts after their dependent bundles are unbundled.

Add a new VERIFY_BUNDLE_QUIET flag to verify_bundle() that avoids the
error messages from the missing prerequisite commits. The method still
returns the number of missing prerequisit commits, allowing callers to
unbundle() to notice that the bundle failed to apply.

Use this flag in bundle-uri.c and test that the messages go away for
'git clone --bundle-uri' commands.

Signed-off-by: Derrick Stolee <derrickstolee@xxxxxxxxxx>
---
 bundle-uri.c                |  2 +-
 bundle.c                    | 10 ++++++++--
 bundle.h                    |  3 ++-
 t/t5558-clone-bundle-uri.sh | 25 ++++++++++++++++++++-----
 4 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/bundle-uri.c b/bundle-uri.c
index c0a6fb05fad..18b993c207f 100644
--- a/bundle-uri.c
+++ b/bundle-uri.c
@@ -309,7 +309,7 @@ static int unbundle_from_file(struct repository *r, const char *file)
 	 * the prerequisite commits.
 	 */
 	if ((result = unbundle(r, &header, bundle_fd, NULL,
-			       VERIFY_BUNDLE_SKIP_REACHABLE)))
+			       VERIFY_BUNDLE_SKIP_REACHABLE | VERIFY_BUNDLE_QUIET)))
 		return 1;
 
 	/*
diff --git a/bundle.c b/bundle.c
index 36ffeb1e0eb..143e7c4508f 100644
--- a/bundle.c
+++ b/bundle.c
@@ -218,7 +218,10 @@ int verify_bundle(struct repository *r,
 			add_pending_object(&revs, o, name);
 			continue;
 		}
-		if (++ret == 1)
+		ret++;
+		if (flags & VERIFY_BUNDLE_QUIET)
+			continue;
+		if (ret == 1)
 			error("%s", message);
 		error("%s %s", oid_to_hex(oid), name);
 	}
@@ -246,7 +249,10 @@ int verify_bundle(struct repository *r,
 		assert(o); /* otherwise we'd have returned early */
 		if (o->flags & SHOWN)
 			continue;
-		if (++ret == 1)
+		ret++;
+		if (flags & VERIFY_BUNDLE_QUIET)
+			continue;
+		if (ret == 1)
 			error("%s", message);
 		error("%s %s", oid_to_hex(oid), name);
 	}
diff --git a/bundle.h b/bundle.h
index 9f798c00d93..ba453404163 100644
--- a/bundle.h
+++ b/bundle.h
@@ -32,7 +32,8 @@ int create_bundle(struct repository *r, const char *path,
 
 enum verify_bundle_flags {
 	VERIFY_BUNDLE_VERBOSE = (1 << 0),
-	VERIFY_BUNDLE_SKIP_REACHABLE = (1 << 1)
+	VERIFY_BUNDLE_SKIP_REACHABLE = (1 << 1),
+	VERIFY_BUNDLE_QUIET = (1 << 2),
 };
 
 int verify_bundle(struct repository *r, struct bundle_header *header,
diff --git a/t/t5558-clone-bundle-uri.sh b/t/t5558-clone-bundle-uri.sh
index a86dc04f528..9b159078386 100755
--- a/t/t5558-clone-bundle-uri.sh
+++ b/t/t5558-clone-bundle-uri.sh
@@ -99,7 +99,10 @@ test_expect_success 'clone bundle list (file, no heuristic)' '
 		uri = file://$(pwd)/clone-from/bundle-4.bundle
 	EOF
 
-	git clone --bundle-uri="file://$(pwd)/bundle-list" clone-from clone-list-file &&
+	git clone --bundle-uri="file://$(pwd)/bundle-list" \
+		clone-from clone-list-file 2>err &&
+	! grep "Repository lacks these prerequisite commits" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-list-file cat-file --batch-check <oids &&
 
@@ -141,7 +144,10 @@ test_expect_success 'clone bundle list (file, all mode, some failures)' '
 	EOF
 
 	GIT_TRACE2_PERF=1 \
-	git clone --bundle-uri="file://$(pwd)/bundle-list" clone-from clone-all-some &&
+	git clone --bundle-uri="file://$(pwd)/bundle-list" \
+		clone-from clone-all-some 2>err &&
+	! grep "Repository lacks these prerequisite commits" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-all-some cat-file --batch-check <oids &&
 
@@ -169,7 +175,10 @@ test_expect_success 'clone bundle list (file, all mode, all failures)' '
 		uri = file://$(pwd)/clone-from/bundle-5.bundle
 	EOF
 
-	git clone --bundle-uri="file://$(pwd)/bundle-list" clone-from clone-all-fail &&
+	git clone --bundle-uri="file://$(pwd)/bundle-list" \
+		clone-from clone-all-fail 2>err &&
+	! grep "Repository lacks these prerequisite commits" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-all-fail cat-file --batch-check <oids &&
 
@@ -195,7 +204,10 @@ test_expect_success 'clone bundle list (file, any mode)' '
 		uri = file://$(pwd)/clone-from/bundle-5.bundle
 	EOF
 
-	git clone --bundle-uri="file://$(pwd)/bundle-list" clone-from clone-any-file &&
+	git clone --bundle-uri="file://$(pwd)/bundle-list" \
+		clone-from clone-any-file 2>err &&
+	! grep "Repository lacks these prerequisite commits" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-any-file cat-file --batch-check <oids &&
 
@@ -284,7 +296,10 @@ test_expect_success 'clone bundle list (HTTP, no heuristic)' '
 		uri = $HTTPD_URL/bundle-4.bundle
 	EOF
 
-	git clone --bundle-uri="$HTTPD_URL/bundle-list" clone-from clone-list-http &&
+	git clone --bundle-uri="$HTTPD_URL/bundle-list" \
+		clone-from clone-list-http  2>err &&
+	! grep "Repository lacks these prerequisite commits" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-list-http cat-file --batch-check <oids
 '
-- 
gitgitgadget




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