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

internal/archive/interface.go

@@ -0,0 +1,84 @@
+//go:build linux || freebsd
+// +build linux freebsd
+
+package archive
+
+import (
+	"io"
+	"strings"
+)
+
+// Extractor is the interface for archive extraction
+type Extractor interface {
+	Name() string
+	Extensions() []string
+	Extract(r io.Reader, destDir string) error
+	CanHandle(filename string) bool
+}
+
+// BaseExtractor provides a basic implementation
+type BaseExtractor struct {
+	name       string
+	extensions []string
+}
+
+func NewBaseExtractor(name string, extensions []string) *BaseExtractor {
+	return &BaseExtractor{name: name, extensions: extensions}
+}
+
+func (b *BaseExtractor) Name() string         { return b.name }
+func (b *BaseExtractor) Extensions() []string { return b.extensions }
+func (b *BaseExtractor) CanHandle(filename string) bool {
+	filename = strings.ToLower(filename)
+	for _, ext := range b.extensions {
+		if strings.HasSuffix(filename, ext) {
+			return true
+		}
+	}
+	return false
+}
+
+// DetectArchiveFormat detects the archive format by file extension
+func DetectArchiveFormat(filename string) string {
+	filename = strings.ToLower(filename)
+	if strings.HasSuffix(filename, ".tar.gz") || strings.HasSuffix(filename, ".tgz") {
+		return "tar.gz"
+	}
+	if strings.HasSuffix(filename, ".tar.bz2") || strings.HasSuffix(filename, ".tbz2") {
+		return "tar.bz2"
+	}
+	if strings.HasSuffix(filename, ".zip") {
+		return "zip"
+	}
+	if strings.HasSuffix(filename, ".tar") {
+		return "tar"
+	}
+	return ""
+}
+
+// IsArchiveFormat checks whether the filename looks like an archive
+func IsArchiveFormat(filename string) bool { return DetectArchiveFormat(filename) != "" }
+
+// GetArchiveAndCompression splits filename into archive + compression parts
+func GetArchiveAndCompression(filename string) (archive, compression string) {
+	filename = strings.ToLower(filename)
+	if strings.HasSuffix(filename, ".tar.gz") || strings.HasSuffix(filename, ".tgz") {
+		return "tar", "gzip"
+	}
+	if strings.HasSuffix(filename, ".tar.bz2") || strings.HasSuffix(filename, ".tbz2") {
+		return "tar", "bzip2"
+	}
+	if strings.HasSuffix(filename, ".zip") {
+		return "zip", ""
+	}
+	if strings.HasSuffix(filename, ".tar") {
+		return "tar", ""
+	}
+	if strings.HasSuffix(filename, ".gz") {
+		return "", "gzip"
+	}
+	if strings.HasSuffix(filename, ".bz2") {
+		return "", "bzip2"
+	}
+	return "", ""
+}