Manually require postshaders

lib/postshader.lua

@@ -27,24 +27,8 @@ local util = require(_PACKAGE..'/util')
 local post_shader = {}
 post_shader.__index = post_shader
 
-local files = love.filesystem.getDirectoryItems(_PACKAGE.."/shaders/postshaders")
+local shaders = require(_PACKAGE..'.shaders.postshaders')
-local shaders = {}
 	
-for i,v in ipairs(files) do
-  local name = _PACKAGE.."/shaders/postshaders/"..v
-  local module = _PACKAGE..".shaders.postshaders."..v:gsub("%.lua","")
-  if love.filesystem.isFile(name) then
-    local str = love.filesystem.read(name)
-    local effect = love.graphics.newShader(require(module))
-    local defs = {}
-    for vtype, extern in str:gmatch("extern (%w+) (%w+)") do
-      defs[extern] = true
-    end
-    local shaderName = name:match(".-([^\\|/]-[^%.]+)$"):gsub("%.lua", "")
-    shaders[shaderName] = {effect, defs}
-  end
-end
-
 local function new()
   local obj = {effects = {}}
   local class = setmetatable(obj, post_shader)

lib/shaders/postshaders/init.lua

@@ -0,0 +1,63 @@
+--[[
+The MIT License (MIT)
+
+Copyright (c) 2016 Marcus Ihde
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+]]
+local _PACKAGE = (...)
+
+-- Since require() doesn't support enumeration we automatically populate the
+-- shader list using
+-- for f in lib/shaders/postshaders/*.lua; echo \"`basename $f .lua`\",
+-- and manually remove init.lua
+local names = {
+"black_and_white",
+"blurh",
+"blurv",
+"chromatic_aberration",
+"contrast",
+"curvature",
+"edges",
+"four_colors",
+"hdr_tv",
+"monochrome",
+"phosphorish",
+"phosphor",
+"pip",
+"pixellate",
+"radialblur",
+"scanlines",
+"tilt_shift",
+"waterpaint",
+}
+
+local shaders = {}
+for _, name in ipairs(names) do
+  local module = _PACKAGE.."."..v
+  local str = require(module)
+  local effect = love.graphics.newShader(str)
+  local defs = {}
+  for vtype, extern in str:gmatch("extern (%w+) (%w+)") do
+    defs[extern] = true
+  end
+  shaders[name] = {effect, defs}
+end
+
+return shaders