git-stash: remove untracked/ignored directories when stashed

The two new stash options --include-untracked and --all do not remove the
untracked and/or ignored files that are stashed if those files reside in
a subdirectory. e.g. the following sequence fails:

   mkdir untracked &&
   echo hello >untracked/file.txt &&
   git stash --include-untracked &&
   test ! -f untracked/file.txt

Within the git-stash script, git-clean is used to remove the
untracked/ignored files, but since the -d option was not supplied, it does
not remove directories.

So, add -d to the git-clean arguments, and update the tests to test this
functionality.

Reported-by: Hilco Wijbenga <hilco.wijbenga@gmail.com>
Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-stash.sh

@@ -228,7 +228,7 @@ save_stash () {
 		test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
 		if test -n "$untracked"
 		then
-			git clean --force --quiet $CLEAN_X_OPTION
+			git clean --force --quiet -d $CLEAN_X_OPTION
 		fi
 
 		if test "$keep_index" = "t" && test -n $i_tree

t/t3905-stash-include-untracked.sh

@@ -17,6 +17,8 @@ test_expect_success 'stash save --include-untracked some dirty working directory
 	echo 3 > file &&
 	test_tick &&
 	echo 1 > file2 &&
+	mkdir untracked &&
+	echo untracked >untracked/untracked &&
 	git stash --include-untracked &&
 	git diff-files --quiet &&
 	git diff-index --cached --quiet HEAD
@@ -40,14 +42,23 @@ index 0000000..d00491f
 +++ b/file2
 @@ -0,0 +1 @@
 +1
+diff --git a/untracked/untracked b/untracked/untracked
+new file mode 100644
+index 0000000..5a72eb2
+--- /dev/null
++++ b/untracked/untracked
+@@ -0,0 +1 @@
++untracked
 EOF
 cat > expect.lstree <<EOF
 file2
+untracked
 EOF
 
 test_expect_success 'stash save --include-untracked stashed the untracked files' '
 	test "!" -f file2 &&
-	git diff HEAD..stash^3 -- file2 >actual &&
+	test ! -e untracked &&
+	git diff HEAD stash^3 -- file2 untracked >actual &&
 	test_cmp expect.diff actual &&
 	git ls-tree --name-only stash^3: >actual &&
 	test_cmp expect.lstree actual
@@ -67,15 +78,18 @@ cat > expect <<EOF
 ?? actual
 ?? expect
 ?? file2
+?? untracked/
 EOF
 
 test_expect_success 'stash pop after save --include-untracked leaves files untracked again' '
 	git stash pop &&
 	git status --porcelain >actual &&
-	test_cmp expect actual
+	test_cmp expect actual &&
+	test "1" = "`cat file2`" &&
+	test untracked = "`cat untracked/untracked`"
 '
 
-git clean --force --quiet
+git clean --force --quiet -d
 
 test_expect_success 'stash save -u dirty index' '
 	echo 4 > file3 &&
@@ -125,12 +139,16 @@ test_expect_success 'stash save --include-untracked removed files got stashed' '
 cat > .gitignore <<EOF
 .gitignore
 ignored
+ignored.d/
 EOF
 
 test_expect_success 'stash save --include-untracked respects .gitignore' '
 	echo ignored > ignored &&
+	mkdir ignored.d &&
+	echo ignored >ignored.d/untracked &&
 	git stash -u &&
 	test -s ignored &&
+	test -s ignored.d/untracked &&
 	test -s .gitignore
 '
 
@@ -143,12 +161,14 @@ test_expect_success 'stash save -u can stash with only untracked files different
 test_expect_success 'stash save --all does not respect .gitignore' '
 	git stash -a &&
 	test "!" -f ignored &&
+	test "!" -e ignored.d &&
 	test "!" -f .gitignore
 '
 
 test_expect_success 'stash save --all is stash poppable' '
 	git stash pop &&
 	test -s ignored &&
+	test -s ignored.d/untracked &&
 	test -s .gitignore
 '