diff --whitespace=warn/error: obey blank-at-eof

The "diff --check" code used to conflate trailing-space whitespace error
class with this, but now we have a proper separate error class, we should
check it under blank-at-eof, not trailing-space.

The whitespace error is not about _having_ blank lines at end, but about
adding _new_ blank lines.  To keep the message consistent with what is
given by "git apply", call whitespace_error_string() to generate it,
instead of using a hardcoded custom message.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index 1eddd590ec745b57d4c0305a35d8d3744bd30ad6..a693d184c95d3aaf8f2ab592bd806bbc64441a39 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1650,10 +1650,14 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
                ecb.priv = &data;
                xdi_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
 
-               if ((data.ws_rule & WS_TRAILING_SPACE) &&
+               if ((data.ws_rule & WS_BLANK_AT_EOF) &&
                    data.trailing_blanks_start) {
-                       fprintf(o->file, "%s:%d: ends with blank lines.\n",
-                               data.filename, data.trailing_blanks_start);
+                       static char *err;
+
+                       if (!err)
+                               err = whitespace_error_string(WS_BLANK_AT_EOF);
+                       fprintf(o->file, "%s:%d: %s\n",
+                               data.filename, data.trailing_blanks_start, err);
                        data.status = 1; /* report errors */
                }
        }

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index b1cbd36d1710a38b94838a2fdf08e0e5ded431f8..a5d446157455de909d47abfd32a363091ed41e42 100755 (executable)
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -335,10 +335,10 @@ test_expect_success 'line numbers in --check output are correct' '
 
 '
 
-test_expect_success 'checkdiff detects trailing blank lines' '
+test_expect_success 'checkdiff detects new trailing blank lines (1)' '
        echo "foo();" >x &&
        echo "" >>x &&
-       git diff --check | grep "ends with blank"
+       git diff --check | grep "new blank line"
 '
 
 test_expect_success 'checkdiff allows new blank lines' '

diff --git a/t/t4019-diff-wserror.sh b/t/t4019-diff-wserror.sh
index 84a1fe31151c2af38554eaca8f03e2c1e2e7848f..1517fff9c64f711a6fd3dda6361a338d0e1fdfe0 100755 (executable)
--- a/t/t4019-diff-wserror.sh
+++ b/t/t4019-diff-wserror.sh
@@ -165,7 +165,7 @@ test_expect_success 'trailing empty lines (1)' '
 
        rm -f .gitattributes &&
        test_must_fail git diff --check >output &&
-       grep "ends with blank lines." output &&
+       grep "new blank line at" output &&
        grep "trailing whitespace" output
 
 '