added UnzipToMemFiles

copy.go

@@ -132,7 +132,7 @@ func copyRecursive(ctx context.Context, src, dest File, patterns []string, buf *
 	}
 
 	if dest.Exists() && !dest.IsDir() {
-		return fmt.Errorf("Can't copy a directory (%s) over a file (%s)", src.URL(), dest.URL())
+		return fmt.Errorf("can not copy a directory (%s) over a file (%s)", src.URL(), dest.URL())
 	}
 
 	// TODO better check

memfile.go

@@ -1,6 +1,7 @@
 package fs
 
 import (
+	"archive/zip"
 	"bytes"
 	"context"
 	"encoding/gob"
@@ -341,3 +342,37 @@ func (i memFileInfo) Mode() iofs.FileMode { return 0666 }
 func (i memFileInfo) ModTime() time.Time  { return time.Now() }
 func (i memFileInfo) IsDir() bool         { return false }
 func (i memFileInfo) Sys() any            { return nil }
+
+// UnzipToMemFiles unzips the passed zipFile as MemFiles.
+func UnzipToMemFiles(ctx context.Context, zipFile FileReader) ([]MemFile, error) {
+	fileReader, err := zipFile.OpenReadSeeker()
+	if err != nil {
+		return nil, err
+	}
+	defer fileReader.Close()
+
+	zipReader, err := zip.NewReader(fileReader, zipFile.Size())
+	if err != nil {
+		return nil, err
+	}
+
+	memFiles := make([]MemFile, len(zipReader.File))
+	for i, zipFile := range zipReader.File {
+		if strings.HasSuffix(zipFile.Name, "/") {
+			continue
+		}
+		r, err := zipFile.Open()
+		if err != nil {
+			return nil, err
+		}
+		memFiles[i], err = ReadAllMemFile(ctx, r, zipFile.Name)
+		if err != nil {
+			return nil, err
+		}
+		err = r.Close()
+		if err != nil {
+			return nil, err
+		}
+	}
+	return memFiles, nil
+}