local: fix filtering of symlinks with -l/--links flag

Before this fix, with the -l flag, the `.rclonelink` suffix wasn't
being added to the file names before filtering by name.

See #6855

backend/local/local.go

@@ -540,11 +540,6 @@ func (f *Fs) List(ctx context.Context, dir string) (entries fs.DirEntries, err e
 				}
 				mode = fi.Mode()
 			}
-			// Don't include non directory if not included
-			// we leave directory filtering to the layer above
-			if useFilter && !fi.IsDir() && !filter.IncludeRemote(newRemote) {
-				continue
-			}
 			if fi.IsDir() {
 				// Ignore directories which are symlinks.  These are junction points under windows which
 				// are kind of a souped up symlink. Unix doesn't have directories which are symlinks.
@@ -557,6 +552,11 @@ func (f *Fs) List(ctx context.Context, dir string) (entries fs.DirEntries, err e
 				if f.opt.TranslateSymlinks && fi.Mode()&os.ModeSymlink != 0 {
 					newRemote += linkSuffix
 				}
+				// Don't include non directory if not included
+				// we leave directory filtering to the layer above
+				if useFilter && !filter.IncludeRemote(newRemote) {
+					continue
+				}
 				fso, err := f.newObjectWithInfo(newRemote, fi)
 				if err != nil {
 					return nil, err

backend/local/local_internal_test.go

@@ -397,7 +397,7 @@ func TestFilter(t *testing.T) {
 	require.Equal(t, "[included]", fmt.Sprint(entries))
 }
 
-func TestFilterSymlink(t *testing.T) {
+func testFilterSymlink(t *testing.T, copyLinks bool) {
 	ctx := context.Background()
 	r := fstest.NewRun(t)
 	defer r.Finalise()
@@ -411,15 +411,23 @@ func TestFilterSymlink(t *testing.T) {
 	require.NoError(t, os.Symlink("included.dir", filepath.Join(r.LocalName, "included.dir.link")))
 	require.NoError(t, os.Symlink("dangling", filepath.Join(r.LocalName, "dangling.link")))
 
+	defer func() {
+		// Reset -L/-l mode
+		f.opt.FollowSymlinks = false
+		f.opt.TranslateSymlinks = false
+		f.lstat = os.Lstat
+	}()
+	if copyLinks {
 		// Set fs into "-L" mode
 		f.opt.FollowSymlinks = true
 		f.opt.TranslateSymlinks = false
 		f.lstat = os.Stat
-
+	} else {
 		// Set fs into "-l" mode
-	// f.opt.FollowSymlinks = false
-	// f.opt.TranslateSymlinks = true
-	// f.lstat = os.Lstat
+		f.opt.FollowSymlinks = false
+		f.opt.TranslateSymlinks = true
+		f.lstat = os.Lstat
+	}
 
 	// Check set up for filtering
 	assert.True(t, f.Features().FilterAware)
@@ -431,21 +439,35 @@ func TestFilterSymlink(t *testing.T) {
 	// Add a filter
 	ctx, fi := filter.AddConfig(ctx)
 	require.NoError(t, fi.AddRule("+ included.file"))
-	require.NoError(t, fi.AddRule("+ included.file.link"))
 	require.NoError(t, fi.AddRule("+ included.dir/**"))
+	if copyLinks {
+		require.NoError(t, fi.AddRule("+ included.file.link"))
 		require.NoError(t, fi.AddRule("+ included.dir.link/**"))
+	} else {
+		require.NoError(t, fi.AddRule("+ included.file.link.rclonelink"))
+		require.NoError(t, fi.AddRule("+ included.dir.link.rclonelink"))
+	}
 	require.NoError(t, fi.AddRule("- *"))
 
 	// Check listing without use filter flag
 	entries, err := f.List(ctx, "")
 	require.NoError(t, err)
 
+	if copyLinks {
 		// Check 1 global errors one for each dangling symlink
 		assert.Equal(t, int64(1), accounting.Stats(ctx).GetErrors(), "global errors found")
+	} else {
+		// Check 0 global errors as dangling symlink copied properly
+		assert.Equal(t, int64(0), accounting.Stats(ctx).GetErrors(), "global errors found")
+	}
 	accounting.Stats(ctx).ResetErrors()
 
 	sort.Sort(entries)
+	if copyLinks {
 		require.Equal(t, "[included.dir included.dir.link included.file included.file.link]", fmt.Sprint(entries))
+	} else {
+		require.Equal(t, "[dangling.link.rclonelink included.dir included.dir.link.rclonelink included.file included.file.link.rclonelink]", fmt.Sprint(entries))
+	}
 
 	// Add user filter flag
 	ctx = filter.SetUseFilter(ctx, true)
@@ -456,7 +478,11 @@ func TestFilterSymlink(t *testing.T) {
 	assert.Equal(t, int64(0), accounting.Stats(ctx).GetErrors(), "global errors found")
 
 	sort.Sort(entries)
+	if copyLinks {
 		require.Equal(t, "[included.dir included.dir.link included.file included.file.link]", fmt.Sprint(entries))
+	} else {
+		require.Equal(t, "[included.dir included.dir.link.rclonelink included.file included.file.link.rclonelink]", fmt.Sprint(entries))
+	}
 
 	// Check listing through a symlink still works
 	entries, err = f.List(ctx, "included.dir")
@@ -466,3 +492,11 @@ func TestFilterSymlink(t *testing.T) {
 	sort.Sort(entries)
 	require.Equal(t, "[included.dir/included.sub.file]", fmt.Sprint(entries))
 }
+
+func TestFilterSymlinkCopyLinks(t *testing.T) {
+	testFilterSymlink(t, true)
+}
+
+func TestFilterSymlinkLinks(t *testing.T) {
+	testFilterSymlink(t, false)
+}