[PATCH v7 12/19] fsck: Disallow demoting grave fsck errors to warnings

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Some kinds of errors are intrinsically unrecoverable (e.g. errors while
uncompressing objects). It does not make sense to allow demoting them to
mere warnings.

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 fsck.c                          | 13 +++++++++++--
 t/t5504-fetch-receive-strict.sh | 11 +++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/fsck.c b/fsck.c
index 3f76f99..85535b1 100644
--- a/fsck.c
+++ b/fsck.c
@@ -9,7 +9,12 @@
 #include "refs.h"
 #include "utf8.h"
 
+#define FSCK_FATAL -1
+
 #define FOREACH_MSG_ID(FUNC) \
+	/* fatal errors */ \
+	FUNC(NUL_IN_HEADER, FATAL) \
+	FUNC(UNTERMINATED_HEADER, FATAL) \
 	/* errors */ \
 	FUNC(BAD_DATE, ERROR) \
 	FUNC(BAD_DATE_OVERFLOW, ERROR) \
@@ -39,11 +44,9 @@
 	FUNC(MISSING_TYPE, ERROR) \
 	FUNC(MISSING_TYPE_ENTRY, ERROR) \
 	FUNC(MULTIPLE_AUTHORS, ERROR) \
-	FUNC(NUL_IN_HEADER, ERROR) \
 	FUNC(TAG_OBJECT_NOT_TAG, ERROR) \
 	FUNC(TREE_NOT_SORTED, ERROR) \
 	FUNC(UNKNOWN_TYPE, ERROR) \
-	FUNC(UNTERMINATED_HEADER, ERROR) \
 	FUNC(ZERO_PADDED_DATE, ERROR) \
 	/* warnings */ \
 	FUNC(BAD_FILEMODE, WARN) \
@@ -149,6 +152,9 @@ void fsck_set_msg_type(struct fsck_options *options,
 		die("Unhandled message id: %s", msg_id);
 	type = parse_msg_type(msg_type);
 
+	if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL)
+		die("Cannot demote %s to %s", msg_id, msg_type);
+
 	if (!options->msg_type) {
 		int i;
 		int *msg_type = xmalloc(sizeof(int) * FSCK_MSG_MAX);
@@ -215,6 +221,9 @@ static int report(struct fsck_options *options, struct object *object,
 	struct strbuf sb = STRBUF_INIT;
 	int msg_type = fsck_msg_type(id, options), result;
 
+	if (msg_type == FSCK_FATAL)
+		msg_type = FSCK_ERROR;
+
 	append_msg_id(&sb, msg_id_info[id].id_string);
 
 	va_start(ap, fmt);
diff --git a/t/t5504-fetch-receive-strict.sh b/t/t5504-fetch-receive-strict.sh
index 36024fc..f5d6d0d 100755
--- a/t/t5504-fetch-receive-strict.sh
+++ b/t/t5504-fetch-receive-strict.sh
@@ -136,4 +136,15 @@ test_expect_success 'push with receive.fsck.missingEmail=warn' '
 	grep "missingEmail" act
 '
 
+test_expect_success \
+	'receive.fsck.unterminatedHeader=warn triggers error' '
+	rm -rf dst &&
+	git init dst &&
+	git --git-dir=dst/.git config receive.fsckobjects true &&
+	git --git-dir=dst/.git config \
+		receive.fsck.unterminatedheader warn &&
+	test_must_fail git push --porcelain dst HEAD >act 2>&1 &&
+	grep "Cannot demote unterminatedheader" act
+'
+
 test_done
-- 
2.3.1.windows.1.9.g8c01ab4



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