Prevent direct access of magic usages

Author: nickclark2016

src/base/oven.lua

@@ -90,7 +90,7 @@
 
 		-- now we can post process the projects for 'uses' entries and apply the
 		-- corresponding 'usage' block to the project.
-		oven.bakeUsages()
+		oven.applyUsages()
 	end
 
 ---
@@ -894,7 +894,7 @@
 -- Post-process the projects for 'uses' entries and apply the corresponding
 -- 'usage' block to the project.
 --
-	function oven.bakeUsages()
+	function oven.applyUsages()
 		local function fetchConfigSetBlocks(cfg)
 			return cfg._cfgset.blocks
 		end
@@ -981,6 +981,11 @@
 			local uses = {}
 
 			for _, use in ipairs(cfg.uses or {}) do
+				if p.usage.isSpecialName(use) then
+					-- Explicitly providing special names is not allowed
+					p.error("Special names are not allowed in 'uses' list. Found '%s' requested in project '%s'", use, cfg.project.name)
+				end
+
 				-- Find a usage block that matches the usage name
 				local namematch = p.usage.findglobal(use)
 				for i = 1, #namematch do

src/base/usage.lua

@@ -33,6 +33,20 @@
 	end
 
 
+---
+-- Checks if a usage name is a magic name (PUBLIC, PRIVATE, INTERFACE)
+--
+-- @param name
+--   The name of the usage.
+-- @return
+--   True if the usage is a special usage.
+---
+
+	function usage.isSpecialName(name)
+		return name == usage.PUBLIC or name == usage.PRIVATE or name == usage.INTERFACE
+	end
+
+
 ---
 -- Check if the usage has a magic name (PUBLIC, PRIVATE, INTERFACE)
 --
@@ -41,7 +55,7 @@
 -- @return
 --	  True if the usage is a special usage.
 	function usage.isSpecial(self)
-		return self.name == usage.PUBLIC or self.name == usage.PRIVATE or self.name == usage.INTERFACE
+		return usage.isSpecialName(self.name)
 	end