Fix severe breakage in "git-apply --whitespace=fix"

735c674 (Trailing whitespace and no newline fix, 2009-07-22) completely
broke --whitespace=fix, causing it to lose all the empty lines in a patch.

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

diff --git a/t/t4124-apply-ws-rule.sh b/t/t4124-apply-ws-rule.sh
index 5698a9a..fac2093 100755 (executable)
--- a/t/t4124-apply-ws-rule.sh
+++ b/t/t4124-apply-ws-rule.sh
@@ -154,7 +154,9 @@ create_patch () {
                index e69de29..8bd6648 100644
                --- a/target
                +++ b/target
-               @@ -0,0 +1 @@
+               @@ -0,0 +1,3 @@
+               +An empty line follows
+               +
                +A line with trailing whitespace and no newline_
                \ No newline at end of file
        EOF
@@ -162,8 +164,10 @@ create_patch () {
 
 test_expect_success 'trailing whitespace & no newline at the end of file' '
        >target &&
-       create_patch | git apply --whitespace=fix - &&
-       grep "newline$" target
+       create_patch >patch-file &&
+       git apply --whitespace=fix patch-file &&
+       grep "newline$" target &&
+       grep "^$" target
 '
 
 test_done

diff --git a/ws.c b/ws.c
index 8d855b7..59d0883 100644 (file)
--- a/ws.c
+++ b/ws.c
@@ -262,10 +262,10 @@ int ws_fix_copy(char *dst, const char *src, int len, unsigned ws_rule, int *erro
         * Strip trailing whitespace
         */
        if (ws_rule & WS_TRAILING_SPACE) {
-               if (1 < len && src[len - 1] == '\n') {
+               if (0 < len && src[len - 1] == '\n') {
                        add_nl_to_tail = 1;
                        len--;
-                       if (1 < len && src[len - 1] == '\r') {
+                       if (0 < len && src[len - 1] == '\r') {
                                add_cr_to_tail = !!(ws_rule & WS_CR_AT_EOL);
                                len--;
                        }