func swallow(self string, binary string, paths []string) error {
sf, err := os.Open(self)
if err != nil {
return fmt.Errorf("open %s: %s", self, err)
}
hzp := binary + ".hzp"
f, err := os.OpenFile(hzp, os.O_RDWR|os.O_CREATE, 0755)
if err != nil {
return fmt.Errorf("open %s: %s", hzp, err)
}
n, err := io.Copy(f, sf)
if err != nil {
sf.Close()
return fmt.Errorf("copy %s->%s: %s", self, hzp, err)
}
if err := sf.Close(); err != nil {
return fmt.Errorf("close %s: %s", self, err)
}
zw := patchzip.NewWriterAt(f, n)
if err := swallowFile(zw, binary); err != nil {
f.Close()
return fmt.Errorf("swallow %s: %s", binary, err)
}
for _, path := range paths {
if err := swallowFile(zw, path); err != nil {
f.Close()
return fmt.Errorf("swallow %s: %s", path, err)
}
}
if err := zw.Close(); err != nil {
return err
}
return f.Close()
}
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
}