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package tarfs
import (
"archive/tar"
"bytes"
"os"
"path/filepath"
"sort"
"syscall"
"github.com/spf13/afero"
)
type File struct {
h *tar.Header
data *bytes.Reader
closed bool
fs *Fs
}
func (f *File) Close() error {
if f.closed {
return afero.ErrFileClosed
}
f.closed = true
f.h = nil
f.data = nil
f.fs = nil
return nil
}
func (f *File) Read(p []byte) (n int, err error) {
if f.closed {
return 0, afero.ErrFileClosed
}
if f.h.Typeflag == tar.TypeDir {
return 0, syscall.EISDIR
}
return f.data.Read(p)
}
func (f *File) ReadAt(p []byte, off int64) (n int, err error) {
if f.closed {
return 0, afero.ErrFileClosed
}
if f.h.Typeflag == tar.TypeDir {
return 0, syscall.EISDIR
}
return f.data.ReadAt(p, off)
}
func (f *File) Seek(offset int64, whence int) (int64, error) {
if f.closed {
return 0, afero.ErrFileClosed
}
if f.h.Typeflag == tar.TypeDir {
return 0, syscall.EISDIR
}
return f.data.Seek(offset, whence)
}
func (f *File) Write(p []byte) (n int, err error) { return 0, syscall.EROFS }
func (f *File) WriteAt(p []byte, off int64) (n int, err error) { return 0, syscall.EROFS }
func (f *File) Name() string {
return filepath.Join(splitpath(f.h.Name))
}
func (f *File) getDirectoryNames() ([]string, error) {
d, ok := f.fs.files[f.Name()]
if !ok {
return nil, &os.PathError{Op: "readdir", Path: f.Name(), Err: syscall.ENOENT}
}
var names []string
for n := range d {
names = append(names, n)
}
sort.Strings(names)
return names, nil
}
func (f *File) Readdir(count int) ([]os.FileInfo, error) {
if f.closed {
return nil, afero.ErrFileClosed
}
if !f.h.FileInfo().IsDir() {
return nil, syscall.ENOTDIR
}
names, err := f.getDirectoryNames()
if err != nil {
return nil, err
}
d := f.fs.files[f.Name()]
var fi []os.FileInfo
for _, n := range names {
if n == "" {
continue
}
f := d[n]
fi = append(fi, f.h.FileInfo())
if count > 0 && len(fi) >= count {
break
}
}
return fi, nil
}
func (f *File) Readdirnames(n int) ([]string, error) {
fi, err := f.Readdir(n)
if err != nil {
return nil, err
}
var names []string
for _, f := range fi {
names = append(names, f.Name())
}
return names, nil
}
func (f *File) Stat() (os.FileInfo, error) { return f.h.FileInfo(), nil }
func (f *File) Sync() error { return nil }
func (f *File) Truncate(size int64) error { return syscall.EROFS }
func (f *File) WriteString(s string) (ret int, err error) { return 0, syscall.EROFS }
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