Major infrastructure changes, part 2.

* Moved helpers, common and triggers dirs into xbps-src, where
  they belong.
* Renamed the templates dir to srcpkgs, it was so redundant before.
* Make it possible to add subpkgs with no restriction in names, for
  example udev now has a subpkgs called "libgudev". Previously
  subpkgs were named "${sourcepkg}-${pkgname}".
* xbps-src: changed to look for template files in current directory.
  That means that most arguments from the targets have been removed.
* xbps-src: added a reinstall target, to remove + install.
* xbps-src: do not overwrite binpkgs by default, skip them.

And more that I forgot because it's a mega-commit that I've been
working for some days already...

--HG--
extra : convert_revision : 0f466878584d1e6895d2a234f07ea1b2d1e61b3e

xbps-src/triggers/mimedb

@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# Updates the shared-mime-info db file with update-mime-database(1).
+#
+# Arguments:	$1 = action [run/targets]
+#		$2 = target [post-install/post-remove]
+#		$3 = pkgname
+#		$4 = version
+#
+mimedb_bin=usr/bin/update-mime-database
+
+case "$1" in
+targets)
+	echo "post-install post-remove"
+	;;
+run)
+	case "$2" in
+	post-*)
+		if [ -x ${mimedb_bin} ]; then
+			echo "Updating shared-mime-info database..."
+			${mimedb_bin} usr/share/mime > /dev/null
+		fi
+		;;
+	esac
+	;;
+*)
+	exit 1
+	;;
+esac
+
+exit 0