Make Context be an interface

cache.go

@@ -15,7 +15,7 @@ type cache struct {
 	baseDir string
 }
 
-func (self *cache) retrieveFile(context *Context, outputPath string, inputFiles []File) (File, error) {
+func (self *cache) retrieveFile(context *contextImpl, outputPath string, inputFiles []File) (File, error) {
 	cachePath, err := self.buildCachePath(context, outputPath, inputFiles)
 	if err != nil {
 		return nil, err
@@ -33,7 +33,7 @@ func (self *cache) retrieveFile(context *Context, outputPath string, inputFiles
 	return outputFile, nil
 }
 
-func (self *cache) storeFile(context *Context, outputFile File, inputFiles []File) error {
+func (self *cache) storeFile(context *contextImpl, outputFile File, inputFiles []File) error {
 	cachePath, err := self.buildCachePath(context, outputFile.Path(), inputFiles)
 	if err != nil {
 		return err
@@ -69,7 +69,7 @@ func (self *cache) storeFile(context *Context, outputFile File, inputFiles []Fil
 	return nil
 }
 
-func (self *cache) buildCachePath(context *Context, outputPath string, inputFiles []File) (string, error) {
+func (self *cache) buildCachePath(context *contextImpl, outputPath string, inputFiles []File) (string, error) {
 	hasher := crc32.NewIEEE()
 	hasher.Write([]byte(outputPath))
 

context.go

@@ -13,7 +13,34 @@ import (
 
 // Context corresponds to the current link in the chain and provides methods
 // that enable plugins to inject new files into the chain.
-type Context struct {
+type Context interface {
+	// CreateFileFrom data creates a new file instance from the provided data buffer.
+	CreateFileFromReader(sourcePath string, reader io.Reader) (File, error)
+
+	// CreateFileFromAsset creates a new file instance from the provided file path.
+	CreateFileFromAsset(sourcePath, dataPath string) (File, error)
+
+	// DispatchFile causes the file to get passed to the next link in the chain.
+	DispatchFile(file File)
+
+	// DispatchAndCacheFile caches the file data (excluding the metadata), taking
+	// dependencies on any input files that are needed to generate it, and then
+	// passes it to the next link in the chain.
+	DispatchAndCacheFile(outputFile File, inputFiles ...File)
+
+	// RetrieveCachedFile looks up file data (excluding the metadata), given an
+	// output path and any input files that are needed to generate it. The function
+	// will return nil if the desired file is not found in the cache.
+	RetrieveCachedFile(outputPath string, inputFiles ...File) File
+
+	// Specify internal filter(s) that exclude files from being processed.
+	Filter(filters ...Filter) Context
+
+	// Specify the maximum number of threads used for processing.
+	Threads(threads int) Context
+}
+
+type contextImpl struct {
 	goldsmith *Goldsmith
 
 	plugin Plugin
@@ -29,7 +56,7 @@ type Context struct {
 }
 
 // CreateFileFrom data creates a new file instance from the provided data buffer.
-func (self *Context) CreateFileFromReader(sourcePath string, reader io.Reader) (File, error) {
+func (self *contextImpl) CreateFileFromReader(sourcePath string, reader io.Reader) (File, error) {
 	data, err := io.ReadAll(reader)
 	if err != nil {
 		return nil, err
@@ -50,7 +77,7 @@ func (self *Context) CreateFileFromReader(sourcePath string, reader io.Reader) (
 }
 
 // CreateFileFromAsset creates a new file instance from the provided file path.
-func (self *Context) CreateFileFromAsset(sourcePath, dataPath string) (File, error) {
+func (self *contextImpl) CreateFileFromAsset(sourcePath, dataPath string) (File, error) {
 	if filepath.IsAbs(sourcePath) {
 		return nil, errors.New("source paths must be relative")
 	}
@@ -82,14 +109,14 @@ func (self *Context) CreateFileFromAsset(sourcePath, dataPath string) (File, err
 }
 
 // DispatchFile causes the file to get passed to the next link in the chain.
-func (self *Context) DispatchFile(file File) {
+func (self *contextImpl) DispatchFile(file File) {
 	self.filesOut <- file
 }
 
 // DispatchAndCacheFile caches the file data (excluding the metadata), taking
 // dependencies on any input files that are needed to generate it, and then
 // passes it to the next link in the chain.
-func (self *Context) DispatchAndCacheFile(outputFile File, inputFiles ...File) {
+func (self *contextImpl) DispatchAndCacheFile(outputFile File, inputFiles ...File) {
 	if self.goldsmith.cache != nil {
 		self.goldsmith.cache.storeFile(self, outputFile, inputFiles)
 	}
@@ -100,7 +127,7 @@ func (self *Context) DispatchAndCacheFile(outputFile File, inputFiles ...File) {
 // RetrieveCachedFile looks up file data (excluding the metadata), given an
 // output path and any input files that are needed to generate it. The function
 // will return nil if the desired file is not found in the cache.
-func (self *Context) RetrieveCachedFile(outputPath string, inputFiles ...File) File {
+func (self *contextImpl) RetrieveCachedFile(outputPath string, inputFiles ...File) File {
 	var outputFile File
 	if self.goldsmith.cache != nil {
 		outputFile, _ = self.goldsmith.cache.retrieveFile(self, outputPath, inputFiles)
@@ -110,7 +137,7 @@ func (self *Context) RetrieveCachedFile(outputPath string, inputFiles ...File) F
 }
 
 // Specify internal filter(s) that exclude files from being processed.
-func (self *Context) Filter(filters ...Filter) *Context {
+func (self *contextImpl) Filter(filters ...Filter) Context {
 	for _, filter := range filters {
 		self.filtersInt.push(filter, self.index)
 	}
@@ -119,12 +146,12 @@ func (self *Context) Filter(filters ...Filter) *Context {
 }
 
 // Specify the maximum number of threads used for processing.
-func (self *Context) Threads(threads int) *Context {
+func (self *contextImpl) Threads(threads int) Context {
 	self.threads = threads
 	return self
 }
 
-func (self *Context) step() {
+func (self *contextImpl) step() {
 	defer close(self.filesOut)
 
 	if initializer, ok := self.plugin.(Initializer); ok {

extension.go

@@ -9,18 +9,18 @@ type Plugin interface {
 // Initializer is used to optionally initialize a plugin and to specify a
 // filter to be used for determining which files will be processed.
 type Initializer interface {
-	Initialize(context *Context) error
+	Initialize(context Context) error
 }
 
 // Processor allows for optional processing of files passing through a plugin.
 type Processor interface {
-	Process(context *Context, file File) error
+	Process(context Context, file File) error
 }
 
 // Finalizer allows for optional finalization of a plugin after all files
 // queued in the chain have passed through it.
 type Finalizer interface {
-	Finalize(context *Context) error
+	Finalize(context Context) error
 }
 
 // Filter is used to determine which files should continue in the chain.

file_exporter.go

@@ -16,13 +16,13 @@ func (*fileExporter) Name() string {
 	return "exporter"
 }
 
-func (self *fileExporter) Initialize(context *Context) error {
+func (self *fileExporter) Initialize(context Context) error {
 	self.tokens = make(map[string]bool)
 	context.Threads(1)
 	return nil
 }
 
-func (self *fileExporter) Process(context *Context, file File) error {
+func (self *fileExporter) Process(context Context, file File) error {
 	slicePath := func(path string) string {
 		if filepath.IsAbs(path) {
 			var err error
@@ -64,7 +64,7 @@ func (self *fileExporter) Process(context *Context, file File) error {
 	return nil
 }
 
-func (self *fileExporter) Finalize(context *Context) error {
+func (self *fileExporter) Finalize(context Context) error {
 	if !self.clean {
 		return nil
 	}

file_importer.go

@@ -13,7 +13,7 @@ func (*fileImporter) Name() string {
 	return "importer"
 }
 
-func (self *fileImporter) Initialize(context *Context) error {
+func (self *fileImporter) Initialize(context Context) error {
 	return filepath.Walk(self.sourceDir, func(path string, info os.FileInfo, err error) error {
 		if info.IsDir() {
 			return nil

goldsmith.go

@@ -8,7 +8,7 @@ import (
 
 // Goldsmith chainable context.
 type Goldsmith struct {
-	contexts []*Context
+	contexts []*contextImpl
 
 	cache   *cache
 	filters filterStack
@@ -40,7 +40,7 @@ func (self *Goldsmith) Clean(clean bool) *Goldsmith {
 
 // Chain links a plugin instance into the chain.
 func (self *Goldsmith) Chain(plugin Plugin) *Goldsmith {
-	context := &Context{
+	context := &contextImpl{
 		goldsmith:  self,
 		plugin:     plugin,
 		filtersExt: append(filterStack(nil), self.filters...),

plugins/absolute/absolute.go

@@ -45,12 +45,12 @@ func (*Absolute) Name() string {
 	return "absolute"
 }
 
-func (*Absolute) Initialize(context *goldsmith.Context) error {
+func (*Absolute) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Absolute) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Absolute) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	if outputFile := context.RetrieveCachedFile(inputFile.Path(), inputFile); outputFile != nil {
 		outputFile.CopyProps(inputFile)
 		context.DispatchFile(outputFile)

plugins/breadcrumbs/breadcrumbs.go

@@ -70,12 +70,12 @@ func (*Breadcrumbs) Name() string {
 	return "breadcrumbs"
 }
 
-func (*Breadcrumbs) Initialize(context *goldsmith.Context) error {
+func (*Breadcrumbs) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Breadcrumbs) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Breadcrumbs) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	var parentNameStr string
 	if parentName, ok := inputFile.Prop(self.parentKey); ok {
 		parentNameStr, _ = parentName.(string)
@@ -103,7 +103,7 @@ func (self *Breadcrumbs) Process(context *goldsmith.Context, inputFile goldsmith
 	return nil
 }
 
-func (self *Breadcrumbs) Finalize(context *goldsmith.Context) error {
+func (self *Breadcrumbs) Finalize(context goldsmith.Context) error {
 	for _, node := range self.allNodes {
 		if len(node.parentName) == 0 {
 			continue

plugins/collection/collection.go

@@ -61,12 +61,12 @@ func (*Collection) Name() string {
 	return "collection"
 }
 
-func (*Collection) Initialize(context *goldsmith.Context) error {
+func (*Collection) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Collection) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Collection) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	self.mutex.Lock()
 	defer func() {
 		inputFile.SetProp(self.groupsKey, self.groups)
@@ -96,7 +96,7 @@ func (self *Collection) Process(context *goldsmith.Context, inputFile goldsmith.
 	return nil
 }
 
-func (self *Collection) Finalize(context *goldsmith.Context) error {
+func (self *Collection) Finalize(context goldsmith.Context) error {
 	for _, files := range self.groups {
 		fg := &fileSorter{files, self.comparer}
 		sort.Sort(fg)

plugins/document/document.go

@@ -32,12 +32,12 @@ func (*Document) Name() string {
 	return "document"
 }
 
-func (*Document) Initialize(context *goldsmith.Context) error {
+func (*Document) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Document) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Document) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	doc, err := goquery.NewDocumentFromReader(inputFile)
 	if err != nil {
 		return err
@@ -61,7 +61,7 @@ func (self *Document) Process(context *goldsmith.Context, inputFile goldsmith.Fi
 	return nil
 }
 
-func (self *Document) Finalize(context *goldsmith.Context) error {
+func (self *Document) Finalize(context goldsmith.Context) error {
 	for _, file := range self.files {
 		context.DispatchFile(file)
 	}

plugins/forward/forward.go

@@ -53,7 +53,7 @@ func (*Forward) Name() string {
 	return "forward"
 }
 
-func (self *Forward) Initialize(context *goldsmith.Context) error {
+func (self *Forward) Initialize(context goldsmith.Context) error {
 	for sourcePath, targetPath := range self.pathMap {
 		sourceFile, err := context.CreateFileFromReader(sourcePath, bytes.NewReader(nil))
 		if err != nil {

plugins/frontmatter/frontmatter.go

@@ -66,12 +66,12 @@ func (*FrontMatter) Name() string {
 	return "frontmatter"
 }
 
-func (*FrontMatter) Initialize(context *goldsmith.Context) error {
+func (*FrontMatter) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.md", "**/*.markdown", "**/*.rst", "**/*.txt", "**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (*FrontMatter) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (*FrontMatter) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	meta, body, err := parse(inputFile)
 	if err != nil {
 		return err

plugins/index/index.go

@@ -60,7 +60,7 @@ func (*Index) Name() string {
 	return "index"
 }
 
-func (self *Index) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Index) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	self.mutex.Lock()
 	defer self.mutex.Unlock()
 
@@ -105,7 +105,7 @@ func (self *Index) Process(context *goldsmith.Context, inputFile goldsmith.File)
 	return nil
 }
 
-func (self *Index) Finalize(context *goldsmith.Context) error {
+func (self *Index) Finalize(context goldsmith.Context) error {
 	for name, list := range self.dirLists {
 		sort.Sort(list.entries)
 

plugins/layout/layout.go

@@ -64,13 +64,13 @@ func (*Layout) Name() string {
 	return "layout"
 }
 
-func (self *Layout) Initialize(context *goldsmith.Context) error {
+func (self *Layout) Initialize(context goldsmith.Context) error {
 	self.template = template.New("").Funcs(self.helpers)
 	context.Filter(wildcard.New("**/*.html", "**/*.htm", "**/*.tmpl", "**/*.gohtml"))
 	return nil
 }
 
-func (self *Layout) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Layout) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	self.mutex.Lock()
 	defer self.mutex.Unlock()
 
@@ -94,7 +94,7 @@ func (self *Layout) Process(context *goldsmith.Context, inputFile goldsmith.File
 	return nil
 }
 
-func (self *Layout) Finalize(context *goldsmith.Context) error {
+func (self *Layout) Finalize(context goldsmith.Context) error {
 	for _, templateFile := range self.templateFiles {
 		var buff bytes.Buffer
 		if _, err := templateFile.WriteTo(&buff); err != nil {

plugins/livejs/livejs.go

@@ -31,13 +31,13 @@ func (*LiveJs) Name() string {
 	return "livejs"
 }
 
-func (self *LiveJs) Initialize(context *goldsmith.Context) error {
+func (self *LiveJs) Initialize(context goldsmith.Context) error {
 	self.html = fmt.Sprintf("\n<!-- begin livejs code -->\n<script>\n%s\n</script>\n<!-- end livejs code -->\n", livejs)
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *LiveJs) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *LiveJs) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	if outputFile := context.RetrieveCachedFile(inputFile.Path(), inputFile); outputFile != nil {
 		outputFile.CopyProps(inputFile)
 		context.DispatchFile(outputFile)

plugins/markdown/markdown.go

@@ -42,12 +42,12 @@ func (*Markdown) Name() string {
 	return "markdown"
 }
 
-func (self *Markdown) Initialize(context *goldsmith.Context) error {
+func (self *Markdown) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.md", "**/*.markdown"))
 	return nil
 }
 
-func (self *Markdown) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Markdown) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	outputPath := strings.TrimSuffix(inputFile.Path(), path.Ext(inputFile.Path())) + ".html"
 	if outputFile := context.RetrieveCachedFile(outputPath, inputFile); outputFile != nil {
 		outputFile.CopyProps(inputFile)

plugins/minify/minify.go

@@ -32,12 +32,12 @@ func (*Minify) Name() string {
 	return "minify"
 }
 
-func (*Minify) Initialize(context *goldsmith.Context) error {
+func (*Minify) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.css", "**/*.html", "**/*.htm", "**/*.js", "**/*.svg", "**/*.json", "**/*.xml"))
 	return nil
 }
 
-func (*Minify) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (*Minify) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	if outputFile := context.RetrieveCachedFile(inputFile.Path(), inputFile); outputFile != nil {
 		outputFile.CopyProps(inputFile)
 		context.DispatchFile(outputFile)

plugins/pager/pager.go

@@ -109,12 +109,12 @@ func (*Pager) Name() string {
 	return "pager"
 }
 
-func (*Pager) Initialize(context *goldsmith.Context) error {
+func (*Pager) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Pager) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Pager) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	self.mutex.Lock()
 	defer self.mutex.Unlock()
 
@@ -200,7 +200,7 @@ func (self *Pager) Process(context *goldsmith.Context, inputFile goldsmith.File)
 	return nil
 }
 
-func (self *Pager) Finalize(ctx *goldsmith.Context) error {
+func (self *Pager) Finalize(ctx goldsmith.Context) error {
 	for _, f := range self.files {
 		ctx.DispatchFile(f)
 	}

plugins/rule/rule.go

@@ -128,7 +128,7 @@ func (*Rule) Name() string {
 	return "rule"
 }
 
-func (self *Rule) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Rule) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	if inputFile.Name() == self.filename {
 		ruleSet, err := newRuleSet(inputFile)
 		if err != nil {
@@ -147,7 +147,7 @@ func (self *Rule) Process(context *goldsmith.Context, inputFile goldsmith.File)
 	return nil
 }
 
-func (self *Rule) Finalize(context *goldsmith.Context) error {
+func (self *Rule) Finalize(context goldsmith.Context) error {
 	for _, inputFile := range self.inputFiles {
 		var block bool
 		for _, ruleSet := range self.ruleSets {

plugins/summary/summary.go

@@ -57,12 +57,12 @@ func (*Summary) Name() string {
 	return "summary"
 }
 
-func (*Summary) Initialize(context *goldsmith.Context) error {
+func (*Summary) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Summary) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Summary) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	doc, err := goquery.NewDocumentFromReader(inputFile)
 	if err != nil {
 		return err

plugins/syndicate/syndicate.go

@@ -120,7 +120,7 @@ func (self *Syndicate) WithFeed(name string, config FeedConfig) *Syndicate {
 	return self
 }
 
-func (self *Syndicate) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Syndicate) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	defer context.DispatchFile(inputFile)
 
 	getString := func(key string) string {
@@ -214,7 +214,7 @@ func (self *Syndicate) Process(context *goldsmith.Context, inputFile goldsmith.F
 	return nil
 }
 
-func (self *feed) output(context *goldsmith.Context) error {
+func (self *feed) output(context goldsmith.Context) error {
 	feed := feeds.Feed{
 		Title:       self.config.Title,
 		Link:        &feeds.Link{Href: self.config.Url},
@@ -310,7 +310,7 @@ func (self *feed) output(context *goldsmith.Context) error {
 	return nil
 }
 
-func (self *Syndicate) Finalize(context *goldsmith.Context) error {
+func (self *Syndicate) Finalize(context goldsmith.Context) error {
 	for _, feed := range self.feeds {
 		feed.output(context)
 	}

plugins/syntax/syntax.go

@@ -69,12 +69,12 @@ func (*Syntax) Name() string {
 	return "syntax"
 }
 
-func (*Syntax) Initialize(context *goldsmith.Context) error {
+func (*Syntax) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Syntax) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Syntax) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	if outputFile := context.RetrieveCachedFile(inputFile.Path(), inputFile); outputFile != nil {
 		outputFile.CopyProps(inputFile)
 		context.DispatchFile(outputFile)

plugins/tags/tags.go

@@ -93,12 +93,12 @@ func (*Tags) Name() string {
 	return "tags"
 }
 
-func (*Tags) Initialize(context *goldsmith.Context) error {
+func (*Tags) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.html", "**/*.htm"))
 	return nil
 }
 
-func (self *Tags) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Tags) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	tagState := &TagState{
 		TagsByName:  &self.infoByName,
 		TagsByCount: &self.infoByCount,
@@ -158,7 +158,7 @@ func (self *Tags) Process(context *goldsmith.Context, inputFile goldsmith.File)
 	return nil
 }
 
-func (self *Tags) Finalize(context *goldsmith.Context) error {
+func (self *Tags) Finalize(context goldsmith.Context) error {
 	for _, info := range self.info {
 		sort.Sort(info.TaggedFiles)
 
@@ -185,7 +185,7 @@ func (self *Tags) Finalize(context *goldsmith.Context) error {
 	return nil
 }
 
-func (self *Tags) buildPages(context *goldsmith.Context) ([]goldsmith.File, error) {
+func (self *Tags) buildPages(context goldsmith.Context) ([]goldsmith.File, error) {
 	var files []goldsmith.File
 	for tag, info := range self.info {
 		var err error

plugins/thumbnail/thumbnail.go

@@ -76,12 +76,12 @@ func (*Thumbnail) Name() string {
 	return "thumbnail"
 }
 
-func (*Thumbnail) Initialize(context *goldsmith.Context) error {
+func (*Thumbnail) Initialize(context goldsmith.Context) error {
 	context.Filter(wildcard.New("**/*.jpg", "**/*.jpeg", "**/*.gif", "**/*.png"))
 	return nil
 }
 
-func (self *Thumbnail) Process(context *goldsmith.Context, inputFile goldsmith.File) error {
+func (self *Thumbnail) Process(context goldsmith.Context, inputFile goldsmith.File) error {
 	defer context.DispatchFile(inputFile)
 
 	thumbPath := self.namer(inputFile.Path(), self.size)
@@ -104,7 +104,7 @@ func (self *Thumbnail) Process(context *goldsmith.Context, inputFile goldsmith.F
 	return nil
 }
 
-func (self *Thumbnail) thumbnail(context *goldsmith.Context, inputFile goldsmith.File, thumbPath string) (goldsmith.File, error) {
+func (self *Thumbnail) thumbnail(context goldsmith.Context, inputFile goldsmith.File, thumbPath string) (goldsmith.File, error) {
 	var thumbFormat imaging.Format
 	switch strings.ToLower(filepath.Ext(thumbPath)) {
 	case ".jpg", ".jpeg":