Moved archive package to public pkg/

pkg/archive/zip.go

@@ -0,0 +1,80 @@
+/*
+Copyright © 2025 Philipp Wolfer <phw@uploadedlobster.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+package archive
+
+import (
+	"archive/zip"
+	"io/fs"
+	"path/filepath"
+)
+
+// An implementation of the [ArchiveReader] interface for zip files.
+type zipArchive struct {
+	zip *zip.ReadCloser
+}
+
+func (a *zipArchive) OpenArchive(path string) error {
+	zip, err := zip.OpenReader(path)
+	if err != nil {
+		return err
+	}
+	a.zip = zip
+	return nil
+}
+
+func (a *zipArchive) Close() error {
+	if a.zip == nil {
+		return nil
+	}
+	return a.zip.Close()
+}
+
+func (a *zipArchive) Glob(pattern string) ([]FileInfo, error) {
+	result := make([]FileInfo, 0)
+	for _, file := range a.zip.File {
+		if file.FileInfo().IsDir() {
+			continue
+		}
+
+		if matched, err := filepath.Match(pattern, file.Name); matched {
+			if err != nil {
+				return nil, err
+			}
+			info := FileInfo{
+				Name: file.Name,
+				File: file,
+			}
+			result = append(result, info)
+		}
+	}
+
+	return result, nil
+}
+
+func (a *zipArchive) Open(path string) (fs.File, error) {
+	file, err := a.zip.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	return file, nil
+}