ref(chart): replace loader.BufferedFile with chart.File

Using Go's gradual code migration feature to deprecate BufferedFile. load_test.go continues to work even with this refactor.

Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>

pkg/chart/chart.go

@@ -15,7 +15,9 @@ limitations under the License.
 
 package chart
 
-import "strings"
+import (
+	"strings"
+)
 
 // APIVersionV1 is the API version number for version 1.
 const APIVersionV1 = "v1"

pkg/chart/loader/archive.go

@@ -101,14 +101,14 @@ func ensureArchive(name string, raw *os.File) error {
 // LoadArchiveFiles reads in files out of an archive into memory. This function
 // performs important path security checks and should always be used before
 // expanding a tarball
-func LoadArchiveFiles(in io.Reader) ([]*BufferedFile, error) {
+func LoadArchiveFiles(in io.Reader) ([]*chart.File, error) {
 	unzipped, err := gzip.NewReader(in)
 	if err != nil {
 		return nil, err
 	}
 	defer unzipped.Close()
 
-	files := []*BufferedFile{}
+	files := []*chart.File{}
 	tr := tar.NewReader(unzipped)
 	for {
 		b := bytes.NewBuffer(nil)
@@ -167,7 +167,7 @@ func LoadArchiveFiles(in io.Reader) ([]*BufferedFile, error) {
 			return nil, err
 		}
 
-		files = append(files, &BufferedFile{Name: n, Data: b.Bytes()})
+		files = append(files, &chart.File{Name: n, Data: b.Bytes()})
 		b.Reset()
 	}
 

pkg/chart/loader/directory.go

@@ -61,7 +61,7 @@ func LoadDir(dir string) (*chart.Chart, error) {
 	}
 	rules.AddDefaults()
 
-	files := []*BufferedFile{}
+	files := []*chart.File{}
 	topdir += string(filepath.Separator)
 
 	walk := func(name string, fi os.FileInfo, err error) error {
@@ -104,7 +104,7 @@ func LoadDir(dir string) (*chart.Chart, error) {
 			return errors.Wrapf(err, "error reading %s", n)
 		}
 
-		files = append(files, &BufferedFile{Name: n, Data: data})
+		files = append(files, &chart.File{Name: n, Data: data})
 		return nil
 	}
 	if err = sympath.Walk(topdir, walk); err != nil {

pkg/chart/loader/load.go

@@ -29,6 +29,12 @@ import (
 	"helm.sh/helm/v3/pkg/chart"
 )
 
+// BufferedFile represents a file as a name/value pair.
+//
+// By convention, name is a relative path within the scope of the chart's
+// base directory.
+type BufferedFile = chart.File
+
 // ChartLoader loads a chart.
 type ChartLoader interface {
 	Load() (*chart.Chart, error)
@@ -62,16 +68,10 @@ func Load(name string) (*chart.Chart, error) {
 	return l.Load()
 }
 
-// BufferedFile represents an archive file buffered for later processing.
-type BufferedFile struct {
-	Name string
-	Data []byte
-}
-
 // LoadFiles loads from in-memory files.
-func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
+func LoadFiles(files []*chart.File) (*chart.Chart, error) {
 	c := new(chart.Chart)
-	subcharts := make(map[string][]*BufferedFile)
+	subcharts := make(map[string][]*chart.File)
 
 	for _, f := range files {
 		switch {
@@ -130,7 +130,7 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 
 			fname := strings.TrimPrefix(f.Name, "charts/")
 			cname := strings.SplitN(fname, "/", 2)[0]
-			subcharts[cname] = append(subcharts[cname], &BufferedFile{Name: fname, Data: f.Data})
+			subcharts[cname] = append(subcharts[cname], &chart.File{Name: fname, Data: f.Data})
 		default:
 			c.Files = append(c.Files, &chart.File{Name: f.Name, Data: f.Data})
 		}
@@ -156,7 +156,7 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 		default:
 			// We have to trim the prefix off of every file, and ignore any file
 			// that is in charts/, but isn't actually a chart.
-			buff := make([]*BufferedFile, 0, len(files))
+			buff := make([]*chart.File, 0, len(files))
 			for _, f := range files {
 				parts := strings.SplitN(f.Name, "/", 2)
 				if len(parts) < 2 {