[valadoc] File Helper: Copy directories recursively

[Ben Iofel <beniofel src gnome org>]

commit 17cc99671ca715ef8472d4b09b51b6b77b0f4118
Author: Ben Iofel <iofelben gmail com>
Date:   Wed Mar 30 17:58:57 2016 -0400

    File Helper: Copy directories recursively

 src/libvaladoc/filehelper.vala |   20 +++++++++++++-------
 1 files changed, 13 insertions(+), 7 deletions(-)
---
diff --git a/src/libvaladoc/filehelper.vala b/src/libvaladoc/filehelper.vala
index 7dcbec8..bc2369b 100644
--- a/src/libvaladoc/filehelper.vala
+++ b/src/libvaladoc/filehelper.vala
@@ -57,14 +57,20 @@ namespace Valadoc {
         * @param dest the destination path
         */
        public bool copy_directory (string src, string dest) {
-               string _src = (src.has_suffix ( "/" ))? src : src + "/";
-               string _dest = (dest.has_suffix ( "/" ))? dest : dest + "/";
-
                try {
-                       GLib.Dir dir = GLib.Dir.open (_src);
-                       for (weak string name = dir.read_name (); name != null ; name = dir.read_name ()) {
-                               if (!copy_file (_src+name, _dest+name)) {
-                                       return false;
+                       GLib.Dir dir = GLib.Dir.open (src);
+                       for (string? file = dir.read_name (); file != null; file = dir.read_name ()) {
+                               string src_file_path = GLib.Path.build_filename (src, file);
+                               string dest_file_path = GLib.Path.build_filename (dest, file);
+                               if (GLib.FileUtils.test (src_file_path, GLib.FileTest.IS_DIR)) {
+                                       GLib.DirUtils.create (dest_file_path, 0755); // mkdir if necessary
+                                       if (!copy_directory (src_file_path, dest_file_path)) { // copy 
directories recursively
+                                               return false;
+                                       }
+                               } else {
+                                       if (!copy_file (src_file_path, dest_file_path)) {
+                                               return false;
+                                       }
                                }
                        }
                }