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192 lines
3.2 KiB
192 lines
3.2 KiB
package Archive
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import (
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"archive/tar"
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"bufio"
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"bytes"
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"compress/gzip"
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"io"
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"io/fs"
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"os"
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"path/filepath"
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)
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func ExtractArchive(source, target string) error {
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var (
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inFile *os.File
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gzipReader *gzip.Reader
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tarReader *tar.Reader
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e error
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)
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inFile, e = os.Open(source)
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if e != nil {
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return e
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}
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defer inFile.Close()
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gzipReader, e = gzip.NewReader(inFile)
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defer gzipReader.Close()
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tarReader = tar.NewReader(gzipReader)
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return extractFromArchive(tarReader, target)
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}
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func extractFromArchive(tarReader *tar.Reader, target string) error {
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var (
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header *tar.Header
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info fs.FileInfo
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file *os.File
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path, basePath string
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e error
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)
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for {
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header, e = tarReader.Next()
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if e == io.EOF {
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break
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}
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if e != nil {
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return e
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}
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path = filepath.Join(target, header.Name)
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info = header.FileInfo()
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if filepath.Base(info.Name()) == "manifest.yml" {
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continue
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}
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if info.IsDir() {
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e = os.MkdirAll(path, info.Mode())
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if e != nil {
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return e
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}
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continue
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}
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basePath, e = filepath.Abs(filepath.Dir(path))
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if e != nil {
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return e
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}
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_, e = os.Stat(basePath)
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if os.IsNotExist(e) {
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e = os.MkdirAll(basePath, info.Mode())
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if e != nil {
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return e
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}
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}
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file, e = os.OpenFile(path, os.O_CREATE|os.O_RDWR, info.Mode())
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if e != nil {
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return e
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}
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defer file.Close()
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_, e = io.Copy(file, tarReader)
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if e != nil {
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return e
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}
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}
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return nil
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}
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func ExtractManifestFile(source string) (string, error) {
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var (
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inFile *os.File
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gzipReader *gzip.Reader
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tarReader *tar.Reader
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e error
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)
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inFile, e = os.Open(source)
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if e != nil {
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return "", e
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}
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defer inFile.Close()
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gzipReader, e = gzip.NewReader(inFile)
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defer gzipReader.Close()
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tarReader = tar.NewReader(gzipReader)
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return extractManifestFromArchive(tarReader)
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}
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func extractManifestFromArchive(tarReader *tar.Reader) (string, error) {
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var (
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header *tar.Header
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info fs.FileInfo
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manifestWriter *bufio.Writer
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manifestBytes bytes.Buffer
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e error
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)
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for {
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header, e = tarReader.Next()
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if e == io.EOF {
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break
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}
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if e != nil {
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return manifestBytes.String(), e
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}
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info = header.FileInfo()
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if filepath.Base(info.Name()) != "manifest.yml" {
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continue
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}
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manifestWriter = bufio.NewWriter(&manifestBytes)
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_, e = io.Copy(manifestWriter, tarReader)
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if e != nil {
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return manifestBytes.String(), e
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}
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}
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return manifestBytes.String(), nil
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}
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func GetPackageFilePaths(source string) ([]string, error) {
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var (
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inFile *os.File
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gzipReader *gzip.Reader
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tarReader *tar.Reader
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info os.FileInfo
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header *tar.Header
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pkgFiles []string
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e error
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)
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inFile, e = os.Open(source)
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if e != nil {
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return pkgFiles, e
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}
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defer inFile.Close()
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gzipReader, e = gzip.NewReader(inFile)
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defer gzipReader.Close()
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tarReader = tar.NewReader(gzipReader)
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for {
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header, e = tarReader.Next()
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if e == io.EOF {
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break
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}
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if e != nil {
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return pkgFiles, e
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}
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info = header.FileInfo()
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if filepath.Base(info.Name()) == "manifest.yml" {
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continue
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}
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pkgFiles = append(pkgFiles, header.Name)
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}
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return pkgFiles, nil
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}
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