Set up _OS for xcode tests

src/_premake_main.lua

@@ -63,13 +63,10 @@
 		end
 		
 
-		-- Some actions imply a particular operating system. Set it early so
-		-- it can be picked up by the scripts.
+		-- Set up the environment for the chosen action early, so side-effects
+		-- can be picked up by the scripts.
 
-		local action = premake.action.current()
-		if action then
-			_OS = action.os or _OS
-		end
+		premake.action.set(_ACTION)
 
 		
 		-- Seed the random number generator so actions don't have to do it themselves

src/actions/xcode/_xcode.lua

@@ -6,27 +6,26 @@
 
 	premake.xcode = { }
 	
--- turned off for the 4.1.2 release
---	newaction 
---	{
---		trigger         = "xcode3",
---		shortname       = "Xcode 3",
---		description     = "Apple Xcode 3 (experimental)",
---		os              = "macosx",
---
---		valid_kinds     = { "ConsoleApp", "WindowedApp", "SharedLib", "StaticLib" },
---		
---		valid_languages = { "C", "C++" },
---		
---		valid_tools     = {
---			cc     = { "gcc" },
---		},
---
---		onsolution = function(sln)
---			premake.generate(sln, "%%.xcodeproj/project.pbxproj", premake.xcode.pbxproj)
---		end,
---		
---		oncleansolution = function(sln)
---			premake.clean.directory(sln, "%%.xcodeproj")
---		end,
---	}
+	newaction 
+	{
+		trigger         = "xcode3",
+		shortname       = "Xcode 3",
+		description     = "Apple Xcode 3 (experimental)",
+		os              = "macosx",
+
+		valid_kinds     = { "ConsoleApp", "WindowedApp", "SharedLib", "StaticLib" },
+		
+		valid_languages = { "C", "C++" },
+		
+		valid_tools     = {
+			cc     = { "gcc" },
+		},
+
+		onsolution = function(sln)
+			premake.generate(sln, "%%.xcodeproj/project.pbxproj", premake.xcode.pbxproj)
+		end,
+		
+		oncleansolution = function(sln)
+			premake.clean.directory(sln, "%%.xcodeproj")
+		end,
+	}

src/base/action.lua

@@ -114,6 +114,23 @@
 	end
 
 
+--
+-- Activates a particular action.
+--
+-- @param name
+--    The name of the action to activate.
+--
+
+	function premake.action.set(name)
+		_ACTION = name
+		-- Some actions imply a particular operating system
+		local action = premake.action.get(name)
+		if action then
+			_OS = action.os or _OS
+		end
+	end
+
+
 --
 -- Determines if an action supports a particular language or target type.
 --

tests/actions/test_xcode.lua

@@ -51,6 +51,7 @@
 
 	local sln, tr
 	function T.xcode3.setup()
+		premake.action.set("xcode3")
 		-- reset the list of generated IDs
 		used_ids = { }
 		sln = test.createsolution()

tests/base/test_action.lua

@@ -58,3 +58,14 @@
 	function T.action.CallSkipsCallbacksIfNotPresent()
 		test.success(premake.action.call, "fake")
 	end
+
+
+--
+-- Tests for set()
+--
+
+	function T.action.set_SetsActionOS()
+		_OS = "linux"
+		premake.action.set("vs2008")
+		test.isequal(_OS, "windows")
+	end