Add an MPD service detection plugin

plugins/mpd.lua

@@ -0,0 +1,45 @@
+--
+-- mpd.lua: Music Player Daemon service detection plugin
+--
+-- Copyright (c) 2015, Přemysl Janouch <p.janouch@gmail.com>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted, provided that the above
+-- copyright notice and this permission notice appear in all copies.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+ponymap.check_api_version (1)
+
+local MPD = {}
+MPD.__index = MPD
+
+function MPD.new (unit)
+	return setmetatable ({ unit = unit, buf = "" }, MPD)
+end
+
+function MPD:on_data (data)
+	self.buf = self.buf .. data
+	local line = string.match (self.buf, "([^\n]*)\n")
+	if line then
+		local version = string.match (line, "OK MPD (.*)")
+		if version then
+			self.unit:add_info ("version " .. version)
+			self.unit:set_success (true)
+		end
+		self.unit:abort ()
+	end
+end
+
+ponymap.register_service ({
+	name = "MPD",
+	flags = 0,
+	new_scan = MPD.new
+})