Add a feature to display the compilation progress as a percentage

tools/hxcpp/BuildTool.hx

@@ -688,7 +688,7 @@ class BuildTool
          } : null;
 
          Profile.push("compile");
-         var progress = new Progress(to_be_compiled.length);
+         var progress = new Progress(to_be_compiled.length, mDefines.exists("HXCPP_PROGRESS_PERCENT"));
          if (threadPool==null)
          {
             for(file in to_be_compiled)

tools/hxcpp/Progress.hx

@@ -1,25 +1,33 @@
 // How many of a group's files have compiled, shown before each file as it starts
-class Progress
-{
+class Progress {
    var finished:Int;
    var total:Int;
+   var usePercent:Bool;
 
-   public function new(inTotal:Int)
-   {
+   public function new(inTotal:Int, usePercent:Bool = false) {
       finished = 0;
       total = inTotal;
+      this.usePercent = usePercent;
    }
 
-   public function label():String
-   {
-      var done = Std.string(finished);
-      while (done.length < Std.string(total).length)
-         done = " " + done;
-      return "\x1b[1m[" + done + "/" + total + "]\x1b[0m";
+   public function label():String {
+      if (usePercent) {
+         var percent = finished / total;
+         var pct = Std.int(percent * 1000) / 10;
+         var str = Std.string(pct);
+         if (Std.int(pct) == pct) {
+            str += ".0";
+         }
+         return "\x1b[1m[" + str + "%]\x1b[0m";
+      } else {
+         var done = Std.string(finished);
+         while (done.length < Std.string(total).length)
+            done = " " + done;
+         return "\x1b[1m[" + done + "/" + total + "]\x1b[0m";
+      }
    }
 
-   public function fileDone()
-   {
+   public function fileDone() {
       Log.lock();
       finished++;
       Log.unlock();