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[PATCH 11/11] prefer "hash mismatch" to "sha1 mismatch"

To future-proof ourselves against a change in the hash, let's use the
more generic "hash mismatch" to refer to integrity problems. Note that
we do advertise this exact string in git-fsck(1). However, the message
itself is marked for translation, meaning we do not expect it to be

While we're touching that documentation, let's also update it for
grammar and clarity.

Signed-off-by: Jeff King <peff@xxxxxxxx>
I'm actually a little nervous that we _shouldn't_ have marked the
messages that fsck produces for translation (and nor should we change
them here, but then we're stuck with the word "sha1" forever).

I actually think fsck ought to have a machine-readable output format,
but of course that does not help any existing scripts.

 Documentation/git-fsck.txt | 6 +++---
 object.c                   | 4 ++--
 sha1-file.c                | 4 ++--
 t/t1450-fsck.sh            | 2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Documentation/git-fsck.txt b/Documentation/git-fsck.txt
index ab9a93fb9b..55950d9eea 100644
--- a/Documentation/git-fsck.txt
+++ b/Documentation/git-fsck.txt
@@ -140,9 +140,9 @@ dangling <type> <object>::
 	The <type> object <object>, is present in the database but never
 	'directly' used. A dangling commit could be a root node.
-sha1 mismatch <object>::
-	The database has an object who's sha1 doesn't match the
-	database value.
+hash mismatch <object>::
+	The database has an object whose hash doesn't match the
+	object database value.
 	This indicates a serious data integrity problem.
 Environment Variables
diff --git a/object.c b/object.c
index a5c5cf830f..df72914bdc 100644
--- a/object.c
+++ b/object.c
@@ -263,7 +263,7 @@ struct object *parse_object(struct repository *r, const struct object_id *oid)
 	    (!obj && has_object_file(oid) &&
 	     oid_object_info(r, oid, NULL) == OBJ_BLOB)) {
 		if (check_object_signature(repl, NULL, 0, NULL) < 0) {
-			error(_("sha1 mismatch %s"), oid_to_hex(oid));
+			error(_("hash mismatch %s"), oid_to_hex(oid));
 			return NULL;
 		parse_blob_buffer(lookup_blob(r, oid), NULL, 0);
@@ -274,7 +274,7 @@ struct object *parse_object(struct repository *r, const struct object_id *oid)
 	if (buffer) {
 		if (check_object_signature(repl, buffer, size, type_name(type)) < 0) {
-			error(_("sha1 mismatch %s"), oid_to_hex(repl));
+			error(_("hash mismatch %s"), oid_to_hex(repl));
 			return NULL;
diff --git a/sha1-file.c b/sha1-file.c
index 55a4782844..a5726c3e73 100644
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -2223,7 +2223,7 @@ static int check_stream_oid(git_zstream *stream,
 	the_hash_algo->final_fn(real_oid.hash, &c);
 	if (!oideq(expected_oid, &real_oid)) {
-		error(_("sha1 mismatch for %s (expected %s)"), path,
+		error(_("hash mismatch for %s (expected %s)"), path,
 		return -1;
@@ -2275,7 +2275,7 @@ int read_loose_object(const char *path,
 		if (check_object_signature(expected_oid, *contents,
 					 *size, type_name(*type))) {
-			error(_("sha1 mismatch for %s (expected %s)"), path,
+			error(_("hash mismatch for %s (expected %s)"), path,
 			goto out;
diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
index 2e5e979336..c61f972141 100755
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh
@@ -406,7 +406,7 @@ test_expect_success 'rev-list --verify-objects with bad sha1' '
 	test_might_fail git rev-list --verify-objects refs/heads/bogus >/dev/null 2>out &&
 	cat out &&
-	test_i18ngrep -q "error: sha1 mismatch 63ffffffffffffffffffffffffffffffffffffff" out
+	test_i18ngrep -q "error: hash mismatch 63ffffffffffffffffffffffffffffffffffffff" out
 test_expect_success 'force fsck to ignore double author' '