142 lines
3.2 KiB
Go
142 lines
3.2 KiB
Go
package testcontainers
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import (
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"archive/tar"
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"bytes"
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"compress/gzip"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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func isDir(path string) (bool, error) {
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file, err := os.Open(path)
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if err != nil {
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return false, err
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}
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defer file.Close()
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fileInfo, err := file.Stat()
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if err != nil {
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return false, err
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}
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if fileInfo.IsDir() {
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return true, nil
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}
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return false, nil
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}
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// tarDir compress a directory using tar + gzip algorithms
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func tarDir(src string, fileMode int64) (*bytes.Buffer, error) {
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// always pass src as absolute path
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abs, err := filepath.Abs(src)
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if err != nil {
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return &bytes.Buffer{}, fmt.Errorf("error getting absolute path: %w", err)
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}
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src = abs
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buffer := &bytes.Buffer{}
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fmt.Printf(">> creating TAR file from directory: %s\n", src)
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// tar > gzip > buffer
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zr := gzip.NewWriter(buffer)
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tw := tar.NewWriter(zr)
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_, baseDir := filepath.Split(src)
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// keep the path relative to the parent directory
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index := strings.LastIndex(src, baseDir)
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// walk through every file in the folder
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err = filepath.Walk(src, func(file string, fi os.FileInfo, errFn error) error {
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if errFn != nil {
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return fmt.Errorf("error traversing the file system: %w", errFn)
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}
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// if a symlink, skip file
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if fi.Mode().Type() == os.ModeSymlink {
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fmt.Printf(">> skipping symlink: %s\n", file)
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return nil
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}
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// generate tar header
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header, err := tar.FileInfoHeader(fi, file)
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if err != nil {
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return fmt.Errorf("error getting file info header: %w", err)
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}
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// see https://pkg.go.dev/archive/tar#FileInfoHeader:
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// Since fs.FileInfo's Name method only returns the base name of the file it describes,
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// it may be necessary to modify Header.Name to provide the full path name of the file.
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header.Name = filepath.ToSlash(file[index:])
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header.Mode = fileMode
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// write header
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if err := tw.WriteHeader(header); err != nil {
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return fmt.Errorf("error writing header: %w", err)
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}
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// if not a dir, write file content
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if !fi.IsDir() {
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data, err := os.Open(file)
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if err != nil {
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return fmt.Errorf("error opening file: %w", err)
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}
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defer data.Close()
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if _, err := io.Copy(tw, data); err != nil {
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return fmt.Errorf("error compressing file: %w", err)
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}
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}
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return nil
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})
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if err != nil {
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return buffer, err
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}
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// produce tar
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if err := tw.Close(); err != nil {
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return buffer, fmt.Errorf("error closing tar file: %w", err)
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}
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// produce gzip
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if err := zr.Close(); err != nil {
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return buffer, fmt.Errorf("error closing gzip file: %w", err)
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}
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return buffer, nil
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}
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// tarFile compress a single file using tar + gzip algorithms
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func tarFile(fileContent []byte, basePath string, fileMode int64) (*bytes.Buffer, error) {
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buffer := &bytes.Buffer{}
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zr := gzip.NewWriter(buffer)
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tw := tar.NewWriter(zr)
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hdr := &tar.Header{
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Name: filepath.Base(basePath),
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Mode: fileMode,
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Size: int64(len(fileContent)),
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}
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if err := tw.WriteHeader(hdr); err != nil {
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return buffer, err
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}
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if _, err := tw.Write(fileContent); err != nil {
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return buffer, err
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}
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// produce tar
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if err := tw.Close(); err != nil {
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return buffer, fmt.Errorf("error closing tar file: %w", err)
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}
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// produce gzip
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if err := zr.Close(); err != nil {
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return buffer, fmt.Errorf("error closing gzip file: %w", err)
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}
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return buffer, nil
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}
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