[PATCH] upload-pack: propagate return value from object filter config callback

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If we encounter an error in parse_filter_object_config(), we'll complain
to stderr but won't actually propagate the return value up the stack.
This is unlike most of our config callbacks, which return the error to
git_config() so it can die (this includes the call just below us to
parse_hide_refs_config(), which can also produce errors).

Signed-off-by: Jeff King <peff@xxxxxxxx>
---
The changed code is from 6dd3456a8c (upload-pack.c: allow banning
certain object filter(s), 2020-08-03), but it was not until 5b01a4e8ff
(upload-pack.c: introduce 'uploadpackfilter.tree.maxDepth', 2020-08-03)
that the function could actually return an error (and so the test
doesn't work until then). Applying on top of tb/upload-pack-filters is
reasonable.

 t/t5616-partial-clone.sh | 8 ++++++++
 upload-pack.c            | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/t/t5616-partial-clone.sh b/t/t5616-partial-clone.sh
index f4d49d8335..2ea66205cf 100755
--- a/t/t5616-partial-clone.sh
+++ b/t/t5616-partial-clone.sh
@@ -251,6 +251,14 @@ test_expect_success 'implicitly construct combine: filter with repeated flags' '
 	test_cmp unique_types.expected unique_types.actual
 '
 
+test_expect_success 'upload-pack complains of bogus filter config' '
+	printf 0000 |
+	test_must_fail git \
+		-c uploadpackfilter.tree.maxdepth \
+		upload-pack . >/dev/null 2>err &&
+	test_i18ngrep "unable to parse.*tree.maxdepth" err
+'
+
 test_expect_success 'upload-pack fails banned object filters' '
 	test_config -C srv.bare uploadpackfilter.blob:none.allow false &&
 	test_must_fail ok=sigpipe git clone --no-checkout --filter=blob:none \
diff --git a/upload-pack.c b/upload-pack.c
index 5dc8e1f844..57a22d14f2 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -1307,7 +1307,8 @@ static int upload_pack_config(const char *var, const char *value, void *cb_data)
 			return git_config_string(&data->pack_objects_hook, var, value);
 	}
 
-	parse_object_filter_config(var, value, data);
+	if (parse_object_filter_config(var, value, data) < 0)
+		return -1;
 
 	return parse_hide_refs_config(var, value, "uploadpack");
 }
-- 
2.29.2.896.g080220a959



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