replaced:

os.get() -> os.target()
os.is() -> os.istarget()
_OS -> _TARGET_OS

added:
os.current()
os.iscurrent()

modules/self-test/test_runner.lua

@@ -108,7 +108,7 @@
 
 		hooks.action = _ACTION
 		hooks.options = _OPTIONS
-		hooks.os = _OS
+		hooks.targetOs = _TARGET_OS
 
 		hooks.io_open = io.open
 		hooks.io_output = io.output
@@ -151,7 +151,7 @@
 	function _.removeTestingHooks(hooks)
 		_ACTION = hooks.action
 		_OPTIONS = hooks.options
-		_OS = hooks.os
+		_TARGET_OS = hooks.targetOs
 
 		io.open = hooks.io_open
 		io.output = hooks.io_output

modules/xcode/_preload.lua

@@ -35,7 +35,7 @@
 
 		-- Xcode always uses Mac OS X path and naming conventions
 
-		os = "macosx",
+		targetos = "macosx",
 
 		-- The capabilities of this action
 

modules/xcode/tests/test_xcode4_project.lua

@@ -48,7 +48,7 @@
 	end
 
 	function suite.setup()
-		_OS = "macosx"
+		_TARGET_OS = "macosx"
 		_ACTION = "xcode4"
 		io.eol = "\n"
 		xcode.used_ids = { } -- reset the list of generated IDs

modules/xcode/tests/test_xcode_project.lua

@@ -19,7 +19,7 @@
 	end
 
 	function suite.setup()
-		_OS = "macosx"
+		_TARGET_OS = "macosx"
 		_ACTION = "xcode4"
 		premake.eol("\n")
 		xcode.used_ids = { } -- reset the list of generated IDs

scripts/package.lua

@@ -60,7 +60,7 @@
 	local pkgName = "premake-" .. version
 	local pkgExt = ".zip"
 
-	if not os.is("windows") and kind == "binary" then
+	if not os.istarget("windows") and kind == "binary" then
 		pkgExt = ".tar.gz"
 	end
 
@@ -180,8 +180,8 @@ if kind == "binary" then
 
 	os.chdir("bin/release")
 
-	local name = string.format("%s-%s%s", pkgName, os.get(), pkgExt)
-	if os.is("windows") then
+	local name = string.format("%s-%s%s", pkgName, os.current(), pkgExt)
+	if os.iscurrent("windows") then
 		execQuiet("zip -9 %s premake5.exe", name)
 	else
 		execQuiet("tar czvf %s premake5", name)

src/actions/make/make_csharp.lua

@@ -200,7 +200,7 @@
 			_x('\t$(SILENT) if exist $(RESPONSE) del %s', path.translate(response, '\\'))
 		_p('endif')
 
-		local sep = os.is("windows") and "\\" or "/"
+		local sep = os.istarget("windows") and "\\" or "/"
 		local tr = project.getsourcetree(prj)
 		premake.tree.traverse(tr, {
 			onleaf = function(node, depth)

src/actions/vstudio/vs2005.lua

@@ -95,7 +95,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/actions/vstudio/vs2008.lua

@@ -22,7 +22,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/actions/vstudio/vs2010.lua

@@ -118,7 +118,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/actions/vstudio/vs2012.lua

@@ -24,7 +24,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/actions/vstudio/vs2013.lua

@@ -26,7 +26,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/actions/vstudio/vs2015.lua

@@ -26,7 +26,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/actions/vstudio/vs2017.lua

@@ -26,7 +26,7 @@
 
 		-- Visual Studio always uses Windows path and naming conventions
 
-		os = "windows",
+		targetos = "windows",
 
 		-- The capabilities of this action
 

src/base/action.lua

@@ -61,6 +61,12 @@
 			error(string.format('action "%s" needs a  %s', name, missing), 3)
 		end
 
+		if act.os ~= nil then
+			premake.warnOnce(act.trigger, "action '" .. act.trigger .. "' sets 'os' field, which is deprecated, use 'targetos' instead.")
+			act.targetos = act.os
+			act.os = nil
+		end
+
 		action._list[act.trigger] = act
 	end
 
@@ -212,7 +218,7 @@
 		-- Some actions imply a particular operating system
 		local act = action.get(name)
 		if act then
-			_OS = act.os or _OS
+			_TARGET_OS = act.targetos or _TARGET_OS
 		end
 
 		-- Some are implemented in standalone modules

src/base/moduledownloader.lua

@@ -23,7 +23,7 @@
 
 		-- get current user.
 		local user = 'UNKNOWN'
-		if os.get() == 'windows' then
+		if os.iscurrent('windows') then
 			user = os.getenv('USERNAME') or user
 		else
 			user = os.getenv('LOGNAME') or user

src/base/os.lua

@@ -69,14 +69,14 @@
 		local path, formats
 
 		-- assemble a search path, depending on the platform
-		if os.is("windows") then
+		if os.istarget("windows") then
 			formats = { "%s.dll", "%s" }
 			path = os.getenv("PATH") or ""
-		elseif os.is("haiku") then
+		elseif os.istarget("haiku") then
 			formats = { "lib%s.so", "%s.so" }
 			path = os.getenv("LIBRARY_PATH") or ""
 		else
-			if os.is("macosx") then
+			if os.istarget("macosx") then
 				formats = { "lib%s.dylib", "%s.dylib" }
 				path = os.getenv("DYLD_LIBRARY_PATH") or ""
 			else
@@ -100,7 +100,7 @@
 			table.insert(formats, "%s")
 			path = path or ""
 			local archpath = "/lib:/usr/lib:/usr/local/lib"
-			if os.is64bit() and not os.is("macosx") then
+			if os.is64bit() and not os.istarget("macosx") then
 				archpath = "/lib64:/usr/lib64/:usr/local/lib64" .. ":" .. archpath
 			end
 			if (#path > 0) then
@@ -134,26 +134,65 @@
 	end
 
 
+--
+-- Retrieve the current target operating system ID string.
+--
 
---
--- Retrieve the current operating system ID string.
---
+	function os.target()
+		return _OPTIONS.os or _TARGET_OS
+	end
 
 	function os.get()
-		return _OPTIONS.os or _OS
+		premake.warnOnce("os.get", "os.get() is deprecated, use 'os.target()' or 'os.current()'.")
+		return os.target()
 	end
 
+	-- deprecate _OS
+	_G_metatable = {
+		__index = function(t, k)
+			if (k == '_OS') then
+				premake.warnOnce("_OS+get", "_OS is deprecated, use '_TARGET_OS'.")
+				return rawget(t, "_TARGET_OS")
+			else
+				return rawget(t, k)
+			end
+		end,
+
+		__newindex = function(t, k, v)
+			if (k == '_OS') then
+				premake.warnOnce("_OS+set", "_OS is deprecated, use '_TARGET_OS'.")
+				rawset(t, "_TARGET_OS", v)
+			else
+				rawset(t, k, v)
+			end
+		end
+	}
+	setmetatable(_G, _G_metatable)
+
 
 
 --
--- Check the current operating system; may be set with the /os command line flag.
+-- Check the current target operating system; may be set with the /os command line flag.
 --
 
+	function os.istarget(id)
+		return (os.target():lower() == id:lower())
+	end
+
 	function os.is(id)
-		return (os.get():lower() == id:lower())
+		premake.warnOnce("os.is", "os.is() is deprecated, use 'os.istarget()' or 'os.iscurrent()'.")
+		return os.istarget(id)
 	end
 
 
+--
+-- Check the current executing operating system.
+--
+
+	function os.iscurrent(id)
+		return (os.current():lower() == id:lower())
+	end
+
 
 ---
 -- Determine if a directory exists on the file system, and that it is a
@@ -219,9 +258,9 @@
 		else
 			-- Identify the system
 			local arch
-			if _OS == "windows" then
+			if os.iscurrent("windows") then
 				arch = os.getenv("PROCESSOR_ARCHITECTURE")
-			elseif _OS == "macosx" then
+			elseif os.iscurrent("macosx") then
 				arch = os.outputof("echo $HOSTTYPE")
 			else
 				arch = os.outputof("uname -m")
@@ -529,7 +568,7 @@
 	}
 
 	function os.translateCommands(cmd, map)
-		map = map or os.get()
+		map = map or os.target()
 		if type(map) == "string" then
 			map = os.commandTokens[map] or os.commandTokens["_"]
 		end

src/base/oven.lua

@@ -63,7 +63,7 @@
 		context.addFilter(self, "_ACTION", _ACTION)
 		context.addFilter(self, "action", _ACTION)
 
-		self.system = self.system or p.action.current().os or os.get()
+		self.system = self.system or p.action.current().targetos or os.target()
 		context.addFilter(self, "system", self.system)
 
 		-- Add command line options to the filtering options
@@ -204,7 +204,7 @@
 		-- Now filter on the current system and architecture, allowing the
 		-- values that might already in the context to override my defaults.
 
-		self.system = self.system or p.action.current().os or os.get()
+		self.system = self.system or p.action.current().targetos or os.target()
 		context.addFilter(self, "system", self.system)
 		context.addFilter(self, "architecture", self.architecture)
 
@@ -528,7 +528,7 @@
 		-- More than a convenience; this is required to work properly with
 		-- external Visual Studio project files.
 
-		local system = p.action.current().os or os.get()
+		local system = p.action.current().targetos or os.target()
 		local architecture = nil
 		local toolset = nil
 

src/host/os_current.c

@@ -0,0 +1,13 @@
+/**
+ * \file   os_current.c
+ * \brief  Get the current OS we're executing on.
+ * \author Copyright (c) 2014-2017 Tom van Dijck, Jason Perkins and the Premake project
+ */
+
+#include "premake.h"
+
+int os_current(lua_State* L)
+{
+	lua_pushstring(L, PLATFORM_STRING);
+	return 1;
+}

src/host/premake.c

@@ -58,6 +58,7 @@ static const luaL_Reg os_functions[] = {
 	{ "chdir",                  os_chdir                },
 	{ "chmod",                  os_chmod                },
 	{ "copyfile",               os_copyfile             },
+	{ "current",                os_current              },
 	{ "_is64bit",               os_is64bit              },
 	{ "isdir",                  os_isdir                },
 	{ "getcwd",                 os_getcwd               },
@@ -153,7 +154,7 @@ int premake_init(lua_State* L)
 
 	/* set the OS platform variable */
 	lua_pushstring(L, PLATFORM_STRING);
-	lua_setglobal(L, "_OS");
+	lua_setglobal(L, "_TARGET_OS");
 
 	/* find the user's home directory */
 	value = getenv("HOME");

src/host/premake.h

@@ -102,6 +102,7 @@ int path_wildcards(lua_State* L);
 int os_chdir(lua_State* L);
 int os_chmod(lua_State* L);
 int os_copyfile(lua_State* L);
+int os_current(lua_State* L);
 int os_getcwd(lua_State* L);
 int os_getpass(lua_State* L);
 int os_getWindowsRegistry(lua_State* L);

src/tools/dotnet.lua

@@ -222,7 +222,7 @@
 		}
 
 		if tool == "csc" then
-			local toolset = _OPTIONS.dotnet or iif(os.is(premake.WINDOWS), "msnet", "mono")
+			local toolset = _OPTIONS.dotnet or iif(os.istarget("windows"), "msnet", "mono")
 			return compilers[toolset]
 		else
 			return "resgen"

tests/actions/make/cpp/test_make_linking.lua

@@ -16,7 +16,7 @@
 	local wks, prj
 
 	function suite.setup()
-		_OS = "linux"
+		_TARGET_OS = "linux"
 		wks, prj = test.createWorkspace()
 	end
 
@@ -41,7 +41,7 @@
 	end
 
 	function suite.links_onMacOSXCppSharedLib()
-		_OS = "macosx"
+		_TARGET_OS = "macosx"
 		kind "SharedLib"
 		prepare { "ldFlags", "linkCmd" }
 		test.capture [[
@@ -169,7 +169,7 @@
     end
 
     function suite.links_onMacOSXSiblingSharedLib()
-    	_OS = "macosx"
+    	_TARGET_OS = "macosx"
         links "MyProject2"
 		flags { "RelativeLinks" }
 

tests/actions/make/cs/test_response.lua

@@ -55,7 +55,7 @@ $(TARGET): $(SOURCES) $(EMBEDFILES) $(DEPENDS) $(RESPONSE)
 	end
 
 	function suite.listResponseRulesPosix()
-		_OS = "linux"
+		_TARGET_OS = "linux"
 		suite.listResponseRules()
 		test.capture [[
 $(RESPONSE): MyProject.make
@@ -72,7 +72,7 @@ endif
 	end
 
 	function suite.listResponseRulesWindows()
-		_OS = "windows"
+		_TARGET_OS = "windows"
 		suite.listResponseRules()
 		test.capture [[
 $(RESPONSE): MyProject.make

tests/base/test_os.lua

@@ -23,9 +23,9 @@
 --
 
 	function suite.findlib_FindSystemLib()
-		if os.is("windows") then
+		if os.istarget("windows") then
 			test.istrue(os.findlib("user32"))
-		elseif os.is("haiku") then
+		elseif os.istarget("haiku") then
 			test.istrue(os.findlib("root"))
 		else
 			test.istrue(os.findlib("m"))
@@ -143,10 +143,10 @@
 	-- Check if outputof returns the command exit code
 	-- in addition of the command output
 	function suite.outputof_commandExitCode()
-		if os.is("macosx")
-			or os.is("linux")
-			or os.is("solaris")
-			or os.is("bsd")
+		if os.istarget("macosx")
+			or os.istarget("linux")
+			or os.istarget("solaris")
+			or os.istarget("bsd")
 		then
 			-- Assumes 'true' and 'false' commands exist
 			-- which should be the case on all *nix platforms
@@ -232,41 +232,41 @@
 -- os.getWindowsRegistry windows tests
 --
 	function suite.getreg_nonExistentValue()
-		if os.is("windows") then
+		if os.iscurrent("windows") then
 			local x = os.getWindowsRegistry("HKCU:Should\\Not\\Exist\\At\\All")
 			test.isequal(nil, x)
 		end
 	end
 
 	function suite.getreg_nonExistentDefaultValue()
-		if os.is("windows") then
+		if os.iscurrent("windows") then
 			local x = os.getWindowsRegistry("HKCU:Should\\Not\\Exist\\At\\All\\")
 			test.isequal(nil, x)
 		end
 	end
 
 	function suite.getreg_noSeparators()
-		if os.is("windows") then
+		if os.iscurrent("windows") then
 			os.getWindowsRegistry("HKCU:ShouldNotExistAtAll")
 		end
 	end
 
 	function suite.getreg_namedValue()
-		if os.is("windows") then
+		if os.iscurrent("windows") then
 			local x = os.getWindowsRegistry("HKCU:Environment\\TEMP")
 			test.istrue(x ~= nil)
 		end
 	end
 
 	function suite.getreg_namedValueOptSeparator()
-		if os.is("windows") then
+		if os.iscurrent("windows") then
 			local x = os.getWindowsRegistry("HKCU:\\Environment\\TEMP")
 			test.istrue(x ~= nil)
 		end
 	end
 
 	function suite.getreg_defaultValue()
-		if os.is("windows") then
+		if os.iscurrent("windows") then
 			local x = os.getWindowsRegistry("HKLM:SYSTEM\\CurrentControlSet\\Control\\SafeBoot\\Minimal\\AppInfo\\")
 			test.isequal("Service", x)
 		end

tests/config/test_links.lua

@@ -16,7 +16,7 @@
 
 	function suite.setup()
 		premake.action.set("test")
-		_OS = "windows"
+		_TARGET_OS = "windows"
 		wks, prj = test.createWorkspace()
 	end
 

tests/config/test_targetinfo.lua

@@ -252,7 +252,7 @@
 --
 
 	function suite.appUsesExe_onDotNet()
-		_OS = "macosx"
+		_TARGET_OS = "macosx"
 		language "C#"
 		i = prepare()
 		test.isequal("MyProject.exe", i.name)
@@ -265,7 +265,7 @@
 --
 
 	function suite.appUsesExe_onDotNet()
-		_OS = "macosx"
+		_TARGET_OS = "macosx"
 		language "C#"
 		kind "SharedLib"
 		i = prepare()

tests/project/test_getconfig.lua

@@ -29,7 +29,7 @@
 --
 
 	function suite.usesCurrentOS_onNoSystemSpecified()
-		_OS = "linux"
+		_TARGET_OS = "linux"
 		project ("MyProject")
 		filter { "system:linux" }
 		defines { "correct" }
@@ -45,7 +45,7 @@
 --
 
 	function suite.actionOverridesOS()
-		_OS = "linux"
+		_TARGET_OS = "linux"
 		_ACTION = "vs2005"
 		project ("MyProject")
 		filter { "system:windows" }
@@ -61,7 +61,7 @@
 --
 
 	function suite.usesCfgSystem()
-		_OS = "linux"
+		_TARGET_OS = "linux"
 		_ACTION = "vs2005"
 		project ("MyProject")
 		system "macosx"

tests/tools/test_dotnet.lua

@@ -28,7 +28,7 @@
 --
 
 	function suite.defaultCompiler_onWindows()
-		_OS = "windows"
+		_TARGET_OS = "windows"
 		prepare()
 		test.isequal("csc", dotnet.gettoolname(cfg, "csc"))
 	end
@@ -39,7 +39,7 @@
 --
 
 	function suite.defaultCompiler_onMacOSX()
-		_OS = "macosx"
+		_TARGET_OS = "macosx"
 		prepare()
 		test.isequal("mcs", dotnet.gettoolname(cfg, "csc"))
 	end