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/info-files

@@ -0,0 +1,50 @@
+#!/bin/sh
+#
+# Registers or unregisters info files for a package.
+#
+# Arguments:	$1 = action [run/targets]
+#		$2 = target [post-install/pre-remove]
+#		$3 = pkgname
+#
+installinfo=usr/bin/install-info
+infodir=usr/share/info
+
+case "$1" in
+targets)
+	echo "post-install pre-remove"
+	;;
+run)
+	[ ! -x "$installinfo" ] && exit 0
+
+	if [ -z "$info_files" ]; then
+		echo "Trigger info-files: empty info_files."
+		exit 1
+	fi
+
+	for f in ${info_files}; do
+		[ "$f" = "/usr/share/info/dir" ] && continue
+
+		case "$2" in
+		post-install)
+			echo -n "Registering info file: $f... "
+			;;
+		pre-remove)
+			echo -n "Unregistering info file: $f... "
+			infoargs="--delete"
+			;;
+		esac
+
+		$installinfo $infoargs ./$f $infodir/dir 2>/dev/null
+		if [ $? -eq 0 ]; then
+			echo "done."
+		else
+			echo "failed!"
+		fi
+	done
+	;;
+*)
+	exit 1
+	;;
+esac
+
+exit 0