git-mv: succeed even if source is a prefix of destination

As noted by Fredrik Kuivinen, without this patch, git-mv fails on

	git-mv README README-renamed

because "README" is a prefix of "README-renamed".

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-mv.c b/builtin-mv.c
index a731f8d9cfed783fb59cb64db93f854ef0a4ebf9..e7b5eb7088dc3d45608a7d9b3ebaf1c66501596e 100644 (file)
--- a/builtin-mv.c
+++ b/builtin-mv.c
@@ -119,6 +119,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 
        /* Checking */
        for (i = 0; i < count; i++) {
+               int length;
                const char *bad = NULL;
 
                if (show_only)
@@ -204,7 +205,9 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
                }
 
                if (!bad &&
-                   !strncmp(destination[i], source[i], strlen(source[i])))
+                   (length = strlen(source[i])) >= 0 &&
+                   !strncmp(destination[i], source[i], length) &&
+                   (destination[i][length] == 0 || destination[i][length] == '/'))
                        bad = "can not move directory into itself";
 
                if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)

diff --git a/t/t7001-mv.sh b/t/t7001-mv.sh
index 900ca93cde02f82c35a59ee99349f9d0c4213867..e5e0bb9d513016c25956e18230dd4ba21fb2445b 100755 (executable)
--- a/t/t7001-mv.sh
+++ b/t/t7001-mv.sh
@@ -59,6 +59,10 @@ test_expect_success \
      git-diff-tree -r -M --name-status  HEAD^ HEAD | \
      grep -E "^R100.+path0/README.+path2/README"'
 
+test_expect_success \
+    'succeed when source is a prefix of destination' \
+    'git-mv path2/COPYING path2/COPYING-renamed'
+
 test_expect_success \
     'moving whole subdirectory into subdirectory' \
     'git-mv path2 path1'