105 lines
1.8 KiB
Go
105 lines
1.8 KiB
Go
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package packd
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"time"
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"github.com/pkg/errors"
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)
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var _ File = &virtualFile{}
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var _ io.Reader = &virtualFile{}
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var _ io.Writer = &virtualFile{}
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var _ fmt.Stringer = &virtualFile{}
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type virtualFile struct {
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buf *bytes.Buffer
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name string
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info fileInfo
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}
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func (f virtualFile) Name() string {
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return f.name
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}
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func (f virtualFile) Seek(offset int64, whence int) (int64, error) {
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return -1, nil
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}
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func (f virtualFile) FileInfo() (os.FileInfo, error) {
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return f.info, nil
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}
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func (f virtualFile) Close() error {
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return nil
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}
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func (f virtualFile) Readdir(count int) ([]os.FileInfo, error) {
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return []os.FileInfo{f.info}, nil
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}
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func (f virtualFile) Stat() (os.FileInfo, error) {
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return f.info, nil
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}
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func (s *virtualFile) String() string {
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return s.buf.String()
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}
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func (s *virtualFile) Read(p []byte) (int, error) {
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return s.buf.Read(p)
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}
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func (s *virtualFile) Write(p []byte) (int, error) {
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bb := &bytes.Buffer{}
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i, err := bb.Write(p)
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if err != nil {
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return i, errors.WithStack(err)
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}
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s.buf = bb
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s.info = fileInfo{
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Path: s.name,
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Contents: bb.Bytes(),
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size: int64(bb.Len()),
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modTime: time.Now(),
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}
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return i, nil
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}
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// NewDir returns a new "virtual" file
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func NewFile(name string, r io.Reader) (File, error) {
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bb := &bytes.Buffer{}
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if r != nil {
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io.Copy(bb, r)
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}
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return &virtualFile{
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buf: bb,
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name: name,
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info: fileInfo{
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Path: name,
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Contents: bb.Bytes(),
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size: int64(bb.Len()),
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modTime: time.Now(),
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},
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}, nil
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}
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// NewDir returns a new "virtual" directory
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func NewDir(name string) (File, error) {
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bb := &bytes.Buffer{}
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return &virtualFile{
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buf: bb,
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name: name,
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info: fileInfo{
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Path: name,
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Contents: bb.Bytes(),
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size: int64(bb.Len()),
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modTime: time.Now(),
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isDir: true,
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},
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}, nil
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}
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