dir.c::test_one_path(): work around directory_exists_in_index_icase() breakage

directory_exists_in_index() takes pathname and its length, but its
helper function directory_exists_in_index_icase() reads one byte
beyond the end of the pathname and expects there to be a '/'.

This needs to be fixed, as that one-byte-beyond-the-end location may
not even be readable, possibly by not registering directories to
name hashes with trailing slashes.  In the meantime, update the new
caller added recently to treat_one_path() to make sure that the path
buffer it gives the function is one byte longer than the path it is
asking the function about by appending a slash to it.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/dir.c b/dir.c
index ff768f3..1000dc2 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -1202,9 +1202,21 @@ static enum path_treatment treat_one_path(struct dir_struct *dir,
         */
        if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
            (dtype == DT_DIR) &&
-           !has_path_in_index &&
-           (directory_exists_in_index(path->buf, path->len) == index_nonexistent))
-               return path_none;
+           !has_path_in_index) {
+               /*
+                * NEEDSWORK: directory_exists_in_index_icase()
+                * assumes that one byte past the given path is
+                * readable and has '/', which needs to be fixed, but
+                * until then, work it around in the caller.
+                */
+               strbuf_addch(path, '/');
+               if (directory_exists_in_index(path->buf, path->len - 1) ==
+                   index_nonexistent) {
+                       strbuf_setlen(path, path->len - 1);
+                       return path_none;
+               }
+               strbuf_setlen(path, path->len - 1);
+       }
 
        exclude = is_excluded(dir, path->buf, &dtype);
 

diff --git a/t/t3010-ls-files-killed-modified.sh b/t/t3010-ls-files-killed-modified.sh
index 6ea7ca8..ab1deae 100755 (executable)
--- a/t/t3010-ls-files-killed-modified.sh
+++ b/t/t3010-ls-files-killed-modified.sh
@@ -78,9 +78,6 @@ date >path7
 touch path10
 >pathx/ju/nk
 
-test_expect_success \
-    'git ls-files -k to show killed files.' \
-    'git ls-files -k >.output'
 cat >.expected <<EOF
 path0/file0
 path1/file1
@@ -89,9 +86,15 @@ path3
 pathx/ju/nk
 EOF
 
-test_expect_success \
-    'validate git ls-files -k output.' \
-    'test_cmp .expected .output'
+test_expect_success 'git ls-files -k to show killed files (w/o icase)' '
+    git ls-files -k >.output &&
+    test_cmp .expected .output
+'
+
+test_expect_success 'git ls-files -k to show killed files (w/ icase)' '
+    git -c core.ignorecase=true ls-files -k >.output &&
+    test_cmp .expected .output
+'
 
 test_expect_success \
     'git ls-files -m to show modified files.' \