72 lines
1.2 KiB
Go
72 lines
1.2 KiB
Go
package vfs
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import (
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/spf13/afero"
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)
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type CopyDir interface {
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Retrieve(name string) (string, error)
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Path(name string) string
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Open(name string) (*os.File, error)
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Destroy() error
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}
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var _ CopyDir = ©Dir{}
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type copyDir struct {
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fs afero.Fs
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path string
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}
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func NewCopyDir(fs afero.Fs) (CopyDir, error) {
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dir, err := ioutil.TempDir("", "vfsCopy")
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if nil != err {
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return nil, err
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}
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return ©Dir{fs, dir}, nil
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}
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func (d *copyDir) Retrieve(name string) (string, error) {
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var path = d.Path(name)
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if _, err := os.Stat(path); os.IsNotExist(err) {
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var dir = filepath.Dir(path)
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os.MkdirAll(dir, 0744)
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dst, err := os.Create(path)
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if nil != err {
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return path, err
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}
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defer dst.Close()
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src, err := d.fs.Open(name)
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if nil != err {
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return path, err
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}
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defer src.Close()
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_, err = io.Copy(dst, src)
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if nil != err {
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return path, err
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}
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}
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return path, nil
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}
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func (d *copyDir) Path(name string) string {
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return filepath.Join(d.path, name)
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}
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func (d *copyDir) Open(name string) (*os.File, error) {
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path, err := d.Retrieve(name)
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if nil != err {
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return nil, err
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}
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return os.Open(path)
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}
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func (d *copyDir) Destroy() error {
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return os.RemoveAll(d.path)
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}
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