bundle-uri: suppress stderr from remote-https

When downloading bundles from a git-remote-https subprocess, the bundle
URI logic wants to be opportunistic and download as much as possible and
work with what did succeed. This is particularly important in the "any"
mode, where any single bundle success will work.

If the URI is not available, the git-remote-https process will die()
with a "fatal:" error message, even though that error is not actually
fatal to the super process. Since stderr is passed through, it looks
like a fatal error to the user.

Suppress stderr to avoid these errors from bubbling to the surface. The
bundle URI API adds its own warning() messages on these failures.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

bundle-uri.c

@@ -230,6 +230,7 @@ static int download_https_uri_to_file(const char *file, const char *uri)
 	int found_get = 0;
 
 	strvec_pushl(&cp.args, "git-remote-https", uri, NULL);
+	cp.err = -1;
 	cp.in = -1;
 	cp.out = -1;
 

t/t5558-clone-bundle-uri.sh

@@ -147,6 +147,8 @@ test_expect_success 'clone bundle list (file, all mode, some failures)' '
 	git clone --bundle-uri="file://$(pwd)/bundle-list" \
 		clone-from clone-all-some 2>err &&
 	! grep "Repository lacks these prerequisite commits" err &&
+	! grep "fatal" err &&
+	grep "warning: failed to download bundle from URI" err &&
 
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-all-some cat-file --batch-check <oids &&
@@ -178,6 +180,8 @@ test_expect_success 'clone bundle list (file, all mode, all failures)' '
 	git clone --bundle-uri="file://$(pwd)/bundle-list" \
 		clone-from clone-all-fail 2>err &&
 	! grep "Repository lacks these prerequisite commits" err &&
+	! grep "fatal" err &&
+	grep "warning: failed to download bundle from URI" err &&
 
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-all-fail cat-file --batch-check <oids &&
@@ -234,7 +238,11 @@ test_expect_success 'clone bundle list (file, any mode, all failures)' '
 		uri = $HTTPD_URL/bundle-5.bundle
 	EOF
 
-	git clone --bundle-uri="file://$(pwd)/bundle-list" clone-from clone-any-fail &&
+	git clone --bundle-uri="file://$(pwd)/bundle-list" \
+		clone-from clone-any-fail 2>err &&
+	! grep "fatal" err &&
+	grep "warning: failed to download bundle from URI" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-any-fail cat-file --batch-check <oids &&
 
@@ -323,7 +331,11 @@ test_expect_success 'clone bundle list (HTTP, any mode)' '
 		uri = $HTTPD_URL/bundle-5.bundle
 	EOF
 
-	git clone --bundle-uri="$HTTPD_URL/bundle-list" clone-from clone-any-http &&
+	git clone --bundle-uri="$HTTPD_URL/bundle-list" \
+		clone-from clone-any-http 2>err &&
+	! grep "fatal" err &&
+	grep "warning: failed to download bundle from URI" err &&
+
 	git -C clone-from for-each-ref --format="%(objectname)" >oids &&
 	git -C clone-any-http cat-file --batch-check <oids &&