diff: Add scanBar for recursive diff

diff-main.go

@@ -97,9 +97,20 @@ func mainDiff(ctx *cli.Context) {
 
 	newFirstURL := stripRecursiveURL(firstURL)
 	for diff := range doDiffMain(newFirstURL, secondURL, isURLRecursive(firstURL)) {
+		if diff.Error != nil {
+			// Print in new line and adjust to top so that we don't print over the ongoing scan bar
+			if !globalQuietFlag && !globalJSONFlag {
+				console.Eraseline()
+			}
+		}
 		fatalIf(diff.Error.Trace(newFirstURL, secondURL), "Failed to diff ‘"+firstURL+"’ and ‘"+secondURL+"’.")
 		printMsg(diff)
 	}
+	// Print in new line and adjust to top so that we don't print over the ongoing scan bar
+	if !globalQuietFlag && !globalJSONFlag {
+		console.Eraseline()
+	}
+	console.Println(console.Colorize("DiffMessage", "Done."))
 }
 
 // doDiffMain runs the diff.

diff.go

@@ -169,6 +169,10 @@ func diffFolders(firstClnt, secondClnt client.Client, outCh chan<- diffMessage)
 //
 // 4: diff(d1..., d2) -> []diff(d1/f, d2/f) -> VALID.
 func diffFoldersRecursive(firstClnt, secondClnt client.Client, outCh chan<- diffMessage) {
+	var scanBar scanBarFunc
+	if !globalQuietFlag && !globalJSONFlag { // set up progress bar
+		scanBar = scanBarFactory()
+	}
 	recursive := true
 	firstListCh := firstClnt.List(recursive, false) // Copy first list channel.
 	for firstContentCh := range firstListCh {
@@ -197,5 +201,8 @@ func diffFoldersRecursive(firstClnt, secondClnt client.Client, outCh chan<- diff
 			outCh <- *diffMsg
 			continue
 		}
+		if !globalQuietFlag && !globalJSONFlag { // set up progress bar
+			scanBar(firstContent.URL.String())
+		}
 	}
 }