correct nested diff colors and dir sizing (fixes #45)

.data/Dockerfile

@@ -7,3 +7,6 @@ RUN cp /somefile.txt /root/example/somefile3.txt
 RUN mv /root/example/somefile3.txt /root/saved.txt
 RUN cp /root/saved.txt /root/.saved.txt
 RUN rm -rf /root/example/
+ADD .data/ /root/.data/
+RUN cp /root/saved.txt /tmp/saved.again1.txt
+RUN cp /root/saved.txt /root/.data/saved.again2.txt

.dockerignore

@@ -1,6 +1,5 @@
 /.git
 /.scripts
-/.data
 /dist
 /ui
 /utils

filetree/node.go

@@ -147,18 +147,19 @@ func (node *FileNode) MetadataString() string {
 
 	var sizeBytes int64
 
-	if node.Data.FileInfo.TarHeader.FileInfo().IsDir() {
-
+	if node.IsLeaf() {
+		sizeBytes = node.Data.FileInfo.TarHeader.FileInfo().Size()
+	} else {
 		sizer := func(curNode *FileNode) error {
-			if curNode.Data.DiffType != Removed {
+			// don't include file sizes of children that have been removed (unless the node in question is a removed dir,
+			// then show the accumulated size of removed files)
+			if curNode.Data.DiffType != Removed || node.Data.DiffType == Removed {
 				sizeBytes += curNode.Data.FileInfo.TarHeader.FileInfo().Size()
 			}
 			return nil
 		}
 
 		node.VisitDepthChildFirst(sizer, nil)
-	} else {
-		sizeBytes = node.Data.FileInfo.TarHeader.FileInfo().Size()
 	}
 
 	size := humanize.Bytes(uint64(sizeBytes))
@@ -254,7 +255,7 @@ func (node *FileNode) Path() string {
 		}
 		node.path = "/" + strings.Join(path, "/")
 	}
-	return node.path
+	return strings.Replace(node.path, "//", "/", -1)
 }
 
 // deriveDiffType determines a DiffType to the current FileNode. Note: the DiffType of a node is always the DiffType of

filetree/node_test.go

@@ -1,6 +1,7 @@
 package filetree
 
 import (
+	"archive/tar"
 	"testing"
 )
 
@@ -87,7 +88,7 @@ func TestPath(t *testing.T) {
 
 	actual := node.Path()
 	if expected != actual {
-		t.Errorf("Expected Path '%s' got '%s'", expected, actual)
+		t.Errorf("Expected path '%s' got '%s'", expected, actual)
 	}
 }
 
@@ -148,3 +149,16 @@ func TestDiffTypeFromRemovedChildren(t *testing.T) {
 	}
 
 }
+
+func TestDirSize(t *testing.T) {
+	tree1 := NewFileTree()
+	tree1.AddPath("/etc/nginx/public1", FileInfo{TarHeader: tar.Header{Size: 100}})
+	tree1.AddPath("/etc/nginx/thing1", FileInfo{TarHeader: tar.Header{Size: 200}})
+	tree1.AddPath("/etc/nginx/public3/thing2", FileInfo{TarHeader: tar.Header{Size: 300}})
+
+	node, _ := tree1.GetNode("/etc/nginx")
+	expected, actual := "----------        0:0      600 B ", node.MetadataString()
+	if expected != actual {
+		t.Errorf("Expected metadata '%s' got '%s'", expected, actual)
+	}
+}

filetree/tree.go

@@ -245,29 +245,38 @@ func (tree *FileTree) RemovePath(path string) error {
 	return node.Remove()
 }
 
-// Compare marks the FileNodes in the owning tree with DiffType annotations when compared to the given tree.
+// Compare marks the FileNodes in the owning (lower) tree with DiffType annotations when compared to the given (upper) tree.
 func (tree *FileTree) Compare(upper *FileTree) error {
+	// always compare relative to the original, unaltered tree.
+	originalTree := tree.Copy()
+
 	graft := func(upperNode *FileNode) error {
 		if upperNode.IsWhiteout() {
 			err := tree.markRemoved(upperNode.Path())
 			if err != nil {
 				return fmt.Errorf("cannot remove upperNode %s: %v", upperNode.Path(), err.Error())
 			}
 		} else {
-			lowerNode, _ := tree.GetNode(upperNode.Path())
-			if lowerNode == nil {
+			// compare against the original tree (to ensure new parents with new children are captured as new instead of modified)
+			originalLowerNode, _ := originalTree.GetNode(upperNode.Path())
+
+			if originalLowerNode == nil {
 				newNode, err := tree.AddPath(upperNode.Path(), upperNode.Data.FileInfo)
 				if err != nil {
 					return fmt.Errorf("cannot add new upperNode %s: %v", upperNode.Path(), err.Error())
 				}
 				newNode.AssignDiffType(Added)
 			} else {
+				// check the tree for comparison markings
+				lowerNode, _ := tree.GetNode(upperNode.Path())
+
 				diffType := lowerNode.compare(upperNode)
 				return lowerNode.deriveDiffType(diffType)
 			}
 		}
 		return nil
 	}
+	// we must visit from the leaves upwards to ensure that diff types can be derived from and assigned to children
 	return upper.VisitDepthChildFirst(graft, nil)
 }
 

filetree/tree_test.go

@@ -288,7 +288,7 @@ func TestCompareWithAdds(t *testing.T) {
 	lowerTree := NewFileTree()
 	upperTree := NewFileTree()
 	lowerPaths := [...]string{"/etc", "/etc/sudoers", "/usr", "/etc/hosts", "/usr/bin"}
-	upperPaths := [...]string{"/etc", "/etc/sudoers", "/usr", "/etc/hosts", "/usr/bin", "/usr/bin/bash"}
+	upperPaths := [...]string{"/etc", "/etc/sudoers", "/usr", "/etc/hosts", "/usr/bin", "/usr/bin/bash", "/a/new/path"}
 
 	for _, value := range lowerPaths {
 		lowerTree.AddPath(value, FileInfo{
@@ -316,7 +316,7 @@ func TestCompareWithAdds(t *testing.T) {
 		p := n.Path()
 		if p == "/" {
 			return nil
-		} else if stringInSlice(p, []string{"/usr/bin/bash"}) {
+		} else if stringInSlice(p, []string{"/usr/bin/bash", "/a", "/a/new", "/a/new/path"}) {
 			if err := AssertDiffType(n, Added); err != nil {
 				failedAssertions = append(failedAssertions, err)
 			}

ui/filetreeview.go

@@ -199,7 +199,7 @@ func (view *FileTreeView) CursorUp() error {
 	return nil
 }
 
-//CursorLeft moves the cursor up until we reach the Parent Node or top of the tree
+// CursorLeft moves the cursor up until we reach the Parent Node or top of the tree
 func (view *FileTreeView) CursorLeft() error {
 	var visitor func(*filetree.FileNode) error
 	var evaluator func(*filetree.FileNode) bool
@@ -255,7 +255,7 @@ func (view *FileTreeView) CursorLeft() error {
 	return view.Render()
 }
 
-//CursorRight descends into directory expanding it if needed
+// CursorRight descends into directory expanding it if needed
 func (view *FileTreeView) CursorRight() error {
 	node := view.getAbsPositionNode()
 	if node == nil {