Move configuration to Goldsmith structure

chain_state.go

@@ -10,7 +10,6 @@ type chainState struct {
 
 	cache   *cache
 	filters filterStack
-	clean   bool
 	index   int
 
 	errors []error

goldsmith.go

@@ -3,28 +3,23 @@ package goldsmith
 
 // Goldsmith chainable context.
 type Goldsmith struct {
+	CacheDir string
+	Clean    bool
+
 	chain *chainState
 }
 
 // Begin starts a chain, reading the files located in the source directory as input.
 func (self *Goldsmith) Begin(sourceDir string) *Goldsmith {
 	self.chain = &chainState{}
+	if len(self.CacheDir) > 0 {
+		self.chain.cache = &cache{self.CacheDir}
+	}
+
 	self.Chain(&fileImporter{sourceDir: sourceDir})
 	return self
 }
 
-// Cache enables caching in cacheDir for the remainder of the chain.
-func (self *Goldsmith) Cache(cacheDir string) *Goldsmith {
-	self.chain.cache = &cache{cacheDir}
-	return self
-}
-
-// Clean enables or disables removal of leftover files in the target directory.
-func (self *Goldsmith) Clean(clean bool) *Goldsmith {
-	self.chain.clean = clean
-	return self
-}
-
 // Chain links a plugin instance into the chain.
 func (self *Goldsmith) Chain(plugin Plugin) *Goldsmith {
 	context := &Context{
@@ -61,7 +56,8 @@ func (self *Goldsmith) FilterPop() *Goldsmith {
 
 // End stops a chain, writing all recieved files to targetDir as output.
 func (self *Goldsmith) End(targetDir string) []error {
-	self.Chain(&fileExporter{targetDir: targetDir, clean: self.chain.clean})
+	self.Chain(&fileExporter{targetDir: targetDir, clean: self.Clean})
+
 	for _, context := range self.chain.contexts {
 		go context.step()
 	}

harness/harness.go

@@ -68,8 +68,8 @@ func validate(sourceDir, targetDir, cacheDir, referenceDir string, stager Stagin
 }
 
 func execute(sourceDir, targetDir, cacheDir string, stager StagingCallback) []error {
-	var gs goldsmith.Goldsmith
+	gs := goldsmith.Goldsmith{CacheDir: cacheDir, Clean: true}
-	gs.Begin(sourceDir).Cache(cacheDir).Clean(true)
+	gs.Begin(sourceDir)
 	stager(&gs)
 	return gs.End(targetDir)
 }