Merge Xcode module integration

.hgsubstate

@@ -1 +1 @@
-3935627f6ef6f848afd1ac3b22cc1eaa7b34a582 modules/xcode
+44e7630091915c687ded94b1bce64d61573cf833 modules/xcode

CONTRIBUTORS.txt

@@ -15,6 +15,8 @@ Builds and Infrastructure:
 Patch contributors:
   Manu Evans <https://bitbucket.org/TurkeyMan>
     * new APIs for debugging, controlling warnings, undefining symbols
-  noresources <https://bitbucket.org/noresources>
+  Mihai Sebea <http://twitter.com/mihai_sebea>
+    * Xcode exporter fixes and improvements
+  Renaud Guillard <https://bitbucket.org/noresources>
     * add library search paths argument to os.findlib()
     * return command exit code from os.outputof()

scripts/embed.lua

@@ -7,6 +7,7 @@
 
 
 	local function loadScript(fname)
+		fname = path.getabsolute(fname)
 		local f = io.open(fname)
 		local s = assert(f:read("*a"))
 		f:close()

src/_manifest.lua

@@ -85,4 +85,8 @@
 		"actions/clean/_clean.lua",
 
 		"_premake_init.lua",
+
+		-- Built-in action modules. The action is registered, but the actual
+		-- implementation is not loaded unless the action is used.
+		"../modules/xcode/_action.lua",
 	}

src/base/action.lua

@@ -197,6 +197,11 @@
 		if act then
 			_OS = act.os or _OS
 		end
+
+		-- Some are implemented in standalone modules
+		if act and act.module then
+			require(act.module)
+		end
 	end