3 files changed, 46 insertions, 17 deletions
diff --git a/source/fileInfo.go b/source/fileInfo.go
index 31885bfd4..7510f306e 100644
--- a/source/fileInfo.go
+++ b/source/fileInfo.go
@@ -34,6 +34,7 @@ var (
 	_ ReadableFile = (*FileInfo)(nil)
 )
 
+// File represents a source file.
 type File interface {
 
 	// Filename gets the full path and filename to the file.
@@ -84,6 +85,7 @@ type ReadableFile interface {
 	Open() (io.ReadCloser, error)
 }
 
+// FileInfo describes a source file.
 type FileInfo struct {
 
 	// Absolute filename to the file on disk.
@@ -112,31 +114,56 @@ type FileInfo struct {
 	lazyInit sync.Once
 }
 
-func (fi *FileInfo) Filename() string            { return fi.filename }
-func (fi *FileInfo) Path() string                { return fi.relPath }
-func (fi *FileInfo) Dir() string                 { return fi.relDir }
-func (fi *FileInfo) Extension() string           { return fi.Ext() }
-func (fi *FileInfo) Ext() string                 { return fi.ext }
-func (fi *FileInfo) Lang() string                { return fi.lang }
-func (fi *FileInfo) LogicalName() string         { return fi.name }
-func (fi *FileInfo) BaseFileName() string        { return fi.baseName }
+// Filename returns a file's filename.
+func (fi *FileInfo) Filename() string { return fi.filename }
+
+// Path returns a file's relative path.
+func (fi *FileInfo) Path() string { return fi.relPath }
+
+// Dir returns a file's directory.
+func (fi *FileInfo) Dir() string { return fi.relDir }
+
+// Extension returns a file's extension.
+func (fi *FileInfo) Extension() string { return fi.Ext() }
+
+// Ext returns a file's extension without the leading period.
+func (fi *FileInfo) Ext() string { return fi.ext }
+
+// Lang returns a file's language.
+func (fi *FileInfo) Lang() string { return fi.lang }
+
+// LogicalName returns a file's name.
+func (fi *FileInfo) LogicalName() string { return fi.name }
+
+// BaseFileName returns a file's base name.
+func (fi *FileInfo) BaseFileName() string { return fi.baseName }
+
+// TranslationBaseName returns a file's translation base name.
 func (fi *FileInfo) TranslationBaseName() string { return fi.translationBaseName }
 
+// Section returns a file's section.
 func (fi *FileInfo) Section() string {
 	fi.init()
 	return fi.section
 }
 
+// UniqueID returns a file's unique identifier.
 func (fi *FileInfo) UniqueID() string {
 	fi.init()
 	return fi.uniqueID
 }
-func (fi *FileInfo) FileInfo() os.FileInfo {
-	return fi.fi
-}
+
+// FileInfo returns a file's underlying os.FileInfo.
+func (fi *FileInfo) FileInfo() os.FileInfo { return fi.fi }
 
 func (fi *FileInfo) String() string { return fi.BaseFileName() }
 
+// Open implements ReadableFile.
+func (fi *FileInfo) Open() (io.ReadCloser, error) {
+	f, err := fi.sp.SourceFs.Open(fi.Filename())
+	return f, err
+}
+
 // We create a lot of these FileInfo objects, but there are parts of it used only
 // in some cases that is slightly expensive to construct.
 func (fi *FileInfo) init() {
@@ -155,6 +182,7 @@ func (fi *FileInfo) init() {
 	})
 }
 
+// NewFileInfo returns a new FileInfo structure.
 func (sp *SourceSpec) NewFileInfo(baseDir, filename string, isLeafBundle bool, fi os.FileInfo) *FileInfo {
 
 	var lang, translationBaseName, relPath string
@@ -218,12 +246,6 @@ func (sp *SourceSpec) NewFileInfo(baseDir, filename string, isLeafBundle bool, f
 
 }
 
-// Open implements ReadableFile.
-func (fi *FileInfo) Open() (io.ReadCloser, error) {
-	f, err := fi.sp.SourceFs.Open(fi.Filename())
-	return f, err
-}
-
 func printFs(fs afero.Fs, path string, w io.Writer) {
 	if fs == nil {
 		return
diff --git a/source/filesystem.go b/source/filesystem.go
index 3f4bf0ff1..0c1a6ac7b 100644
--- a/source/filesystem.go
+++ b/source/filesystem.go
@@ -24,6 +24,7 @@ import (
 	"golang.org/x/text/unicode/norm"
 )
 
+// Filesystem represents a source filesystem.
 type Filesystem struct {
 	files     []ReadableFile
 	filesInit sync.Once
@@ -33,14 +34,17 @@ type Filesystem struct {
 	SourceSpec
 }
 
+// Input describes a source input.
 type Input interface {
 	Files() []ReadableFile
 }
 
+// NewFilesystem returns a new filesytem for a given source spec.
 func (sp SourceSpec) NewFilesystem(base string) *Filesystem {
 	return &Filesystem{SourceSpec: sp, Base: base}
 }
 
+// Files returns a slice of readable files.
 func (f *Filesystem) Files() []ReadableFile {
 	f.filesInit.Do(func() {
 		f.captureFiles()
diff --git a/source/sourceSpec.go b/source/sourceSpec.go
index 144d86ca3..13aac4592 100644
--- a/source/sourceSpec.go
+++ b/source/sourceSpec.go
@@ -76,6 +76,7 @@ func NewSourceSpec(ps *helpers.PathSpec, fs afero.Fs) *SourceSpec {
 
 }
 
+// IgnoreFile returns whether a given file should be ignored.
 func (s *SourceSpec) IgnoreFile(filename string) bool {
 	if filename == "" {
 		if _, ok := s.SourceFs.(*afero.OsFs); ok {
@@ -109,6 +110,8 @@ func (s *SourceSpec) IgnoreFile(filename string) bool {
 	return false
 }
 
+// IsRegularSourceFile returns whether filename represents a regular file in the
+// source filesystem.
 func (s *SourceSpec) IsRegularSourceFile(filename string) (bool, error) {
 	fi, err := helpers.LstatIfPossible(s.SourceFs, filename)
 	if err != nil {