feat: initial goget release — modern IPv6-first download utility

internal/archive/targz.go

@@ -0,0 +1,42 @@
+//go:build linux || freebsd
+// +build linux freebsd
+
+package archive
+
+import (
+	"compress/gzip"
+	"fmt"
+	"io"
+)
+
+type tarGzExtractor struct {
+	*BaseExtractor
+	tar *tarExtractor
+}
+
+func NewTarGzExtractor() *tarGzExtractor {
+	return &tarGzExtractor{
+		BaseExtractor: NewBaseExtractor("tar.gz", []string{".tar.gz", ".tgz"}),
+		tar:           NewTarExtractor(),
+	}
+}
+
+// Extract extracts a tar.gz archive into destDir
+func (t *tarGzExtractor) Extract(r io.Reader, destDir string) error {
+	// Step 1: Create gzip reader for decompression
+	gzr, err := gzip.NewReader(r)
+	if err != nil {
+		return fmt.Errorf("failed to create gzip reader: %w", err)
+	}
+	defer func() {
+		if cerr := gzr.Close(); cerr != nil && err == nil {
+			err = cerr
+		}
+	}()
+
+	// Step 2: Extract tar from decompressed stream
+	// gzr implements io.Reader that returns DECOMPRESSED data
+	return t.tar.Extract(gzr, destDir)
+}
+
+func init() { Register(NewTarGzExtractor()) }