Remove empty directories when checking out a commit with fewer submodules

Change the unlink_entry function to use rmdir to remove submodule
directories.  Currently we try to use unlink, which will never succeed.

Of course rmdir will only succeed for empty (i.e. not checked out)
submodule directories.  Behaviour if a submodule is checked out stays
essentially the same: print a warning message and keep the submodule
directory.

Signed-off-by: Peter Collingbourne <peter@pcc.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
index a0cc99ab9f5b262851a1075193f5529b5582fd0a..1a4dc5f89353df7d7bda4bea539ee5bd7a3b9bae 100755 (executable)
--- a/t/t7400-submodule-basic.sh
+++ b/t/t7400-submodule-basic.sh
@@ -299,6 +299,15 @@ test_expect_success 'ls-files gracefully handles trailing slash' '
 
 '
 
+test_expect_success 'moving to a commit without submodule does not leave empty dir' '
+       rm -rf init &&
+       mkdir init &&
+       git reset --hard &&
+       git checkout initial &&
+       test ! -d init &&
+       git checkout second
+'
+
 test_expect_success 'submodule <invalid-path> warns' '
 
        git submodule no-such-submodule 2> output.err &&

diff --git a/unpack-trees.c b/unpack-trees.c
index dd5999c3562219b7993420b22257f4088ab82b8d..b69847d6c9205d837c91ef7a1c5e7cb794d7fdad 100644 (file)
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -61,8 +61,16 @@ static void unlink_entry(struct cache_entry *ce)
 {
        if (has_symlink_or_noent_leading_path(ce->name, ce_namelen(ce)))
                return;
-       if (unlink_or_warn(ce->name))
-               return;
+       if (S_ISGITLINK(ce->ce_mode)) {
+               if (rmdir(ce->name)) {
+                       warning("unable to rmdir %s: %s",
+                               ce->name, strerror(errno));
+                       return;
+               }
+       }
+       else
+               if (unlink_or_warn(ce->name))
+                       return;
        schedule_dir_for_removal(ce->name, ce_namelen(ce));
 }