[script/builder] supporting local overlays

script/builder

@@ -57,11 +57,32 @@ say "\t* ".$_ for @ARGV;
 
 say "* Syncing stuff for you, if it's the first time, can take a while";
 
-# Syncronizing Portage and Entropy
+# Syncronizing portage configuration and adding overlays
 system("echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen"); #be sure about that.
 system("cd /etc/portage/;git checkout master; git pull");
 system("echo 'y' | layman -f -a $_") for @overlays;
+
+# Setting up a local overlay if doesn't exists
+if (!-f "/usr/local/portage/profiles/repo_name") {
+    system("mkdir -p /usr/local/portage/{metadata,profiles}");
+    system("echo 'LocalOverlay' > /usr/local/portage/profiles/repo_name");
+    system("echo 'masters = gentoo' > /usr/local/portage/metadata/layout.conf");
+    system("chown -R portage:portage /usr/local/portage");
+}
+
+# Anyway should be declared, also if you mount it with docker
+qx{
+echo '[LocalOverlay]
+location = /usr/local/portage
+masters = gentoo
+priority=9999
+auto-sync = no' > /etc/portage/repos.conf/local.conf
+}; # Declaring the repo and giving priority
+
+# sync portage and overlays
 system("layman -S;emerge --sync --quiet");
+
+
 qx|eselect profile set $profile|;
 qx{ls /usr/portage/licenses -1 | xargs -0 > /etc/entropy/packages/license.accept}
     ;    #HAHA