func Zip(path string, dirs []string) (err error) {
if IsZip(path) {
return errors.New(path + " is already a zip file")
}
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
if err != nil {
return
}
defer f.Close()
startoffset, err := f.Seek(0, os.SEEK_END)
if err != nil {
return
}
w := patch.NewWriterAt(f, startoffset)
for _, dir := range dirs {
err = filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
fh, err := patch.FileInfoHeader(info)
if err != nil {
return err
}
fh.Name = path
p, err := w.CreateHeader(fh)
if err != nil {
return err
}
if !info.IsDir() {
content, err := ioutil.ReadFile(path)
if err != nil {
return err
}
_, err = p.Write(content)
if err != nil {
return err
}
}
return err
})
}
err = w.Close()
return
}
func swallowFile(zw *patchzip.Writer, path string) error {
fmt.Printf(" archiving %s ...\n", path)
f, err := os.Open(path)
if err != nil {
return fmt.Errorf("open %s: %s", path, err)
}
fi, err := f.Stat()
if err != nil {
return fmt.Errorf("stat %s: %s", path, err)
}
fh, err := patchzip.FileInfoHeader(fi)
if err != nil {
return fmt.Errorf("fileinfoheader %s: %s", path, err)
}
fh.Name = path
w, err := zw.CreateHeader(fh)
if err != nil {
return fmt.Errorf("create header %s: %s", path, err)
}
if _, err := io.Copy(w, f); err != nil {
return fmt.Errorf("archive %s: %s", path, err)
}
return nil
}