local-server/vendor/github.com/gobuffalo/packd/file.go
2018-11-13 14:44:15 +11:00

105 lines
1.8 KiB
Go

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