- further improve premake usages setup

Author: SoapyMan

DriverLevelTool/premake5.lua

@@ -1,20 +1,14 @@
 -- premake5.lua
 
--- you can redefine dependencies
-SDL2_DIR = os.getenv("SDL2_DIR") or "../dependencies/SDL2"
-
 project "DriverLevelTool"
     kind "ConsoleApp"
     language "C++"
     targetdir "bin/%{cfg.buildcfg}"
 
-	uses {  "libnstd", "glad", "ImGui", "frameworkLib" }
+	uses { "ImGui", "libnstd", "frameworkLib" }
 
 	includedirs {
 		"./",
-		"../dependencies/libnstd/include",
-		"../dependencies/imgui",
-		"../dependencies"
 	}
 
     files {
@@ -29,30 +23,12 @@ project "DriverLevelTool"
         buildoptions {
             "-Wno-narrowing",
             "-fpermissive",
-        }
-		includedirs {
-            "/usr/include/SDL2"
         }
 		links {
-            "GL",
-            "SDL2",
 			"dl"
         }
 
         cppdialect "C++11"
-		
-	filter "system:windows"
-		includedirs {
-			SDL2_DIR.."/include"
-		}
-		links { 
-            "SDL2", 
-			"ImGui"
-        }
-		libdirs { 
-			SDL2_DIR.."/lib/x86",
-		}
-
 
     filter "configurations:Debug"
 		targetsuffix "_dbg"

premake5.lua

@@ -93,21 +93,26 @@ project "glad"
 
 usage "glad"
 	includedirs {
-        "dependencies/glad/*.h",
+        "dependencies",
     }
+
+	filter "system:linux"
+		links {
+			"GL",
+		}
 
 -- ImGui
 project "ImGui"
     kind "StaticLib"
 	targetdir "bin/%{cfg.buildcfg}"
+
+	uses {"SDL2", "glad"}
 
 	filter "system:Windows"
 		defines { "_CRT_SECURE_NO_WARNINGS", "IMGUI_IMPL_OPENGL_LOADER_GLAD" }
 
 	includedirs {
 		"dependencies/imgui",
-		"dependencies",
-		SDL2_DIR.."/include"
 	}
 
     files {
@@ -124,6 +129,25 @@ usage "ImGui"
 		"dependencies/imgui",
 	}
 	links { "ImGui" }
+	
+-- SDL2 as a usage
+usage "SDL2"
+	links {
+		"SDL2",
+	}
+	
+	filter "system:linux"
+		includedirs {
+            "/usr/include/SDL2"
+        }
+
+	filter "system:windows"
+		includedirs {
+			SDL2_DIR.."/include"
+		}
+		libdirs { 
+			SDL2_DIR.."/lib/x86",
+		}
 
 include "DriverLevelTool/premake5.lua"
 include "DriverSoundTool/premake5.lua"