added a buildinput command to add additional input dependencies to custom build commands.

src/_premake_init.lua

@@ -114,6 +114,13 @@
 		tokens = true,
 	}
 
+	api.register {
+		name = "buildinputs",
+		scope = "config",
+		kind = "list:path",
+		tokens = true,
+	}
+
 	api.register {
 		name = "buildrule",     -- DEPRECATED
 		scope = "config",

src/actions/vstudio/vs2010_vcxproj.lua

@@ -656,6 +656,11 @@
 						if filecfg.buildmessage then
 							m.element("Message", condition, '%s', filecfg.buildmessage)
 						end
+
+						if filecfg.buildinputs and #filecfg.buildinputs > 0 then
+							local inputs = project.getrelative(prj, filecfg.buildinputs)
+							m.element("AdditionalInputs", condition, '%s', table.concat(inputs, " "))
+						end
 					end
 				end
 

tests/actions/vstudio/vc2010/test_files.lua

@@ -115,6 +115,28 @@
 		]]
 	end
 
+	function suite.customBuild_onBuildRuleWithAdditionalInputs()
+		files { "hello.cg" }
+		filter "files:**.cg"
+			buildcommands { "cgc $(InputFile)" }
+			buildoutputs { "$(InputName).obj" }
+			buildinputs { "common.cg.inc" }
+		prepare()
+		test.capture [[
+<ItemGroup>
+	<CustomBuild Include="hello.cg">
+		<FileType>Document</FileType>
+		<Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">cgc $(InputFile)</Command>
+		<Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(InputName).obj</Outputs>
+		<AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">common.cg.inc</AdditionalInputs>
+		<Command Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">cgc $(InputFile)</Command>
+		<Outputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(InputName).obj</Outputs>
+		<AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">common.cg.inc</AdditionalInputs>
+	</CustomBuild>
+</ItemGroup>
+		]]
+	end
+
 
 --
 -- If a PCH source is specified, ensure it is included in the file configuration.