func hashForFile(buildDir, path string, info os.FileInfo) (h *fileHash, err error) {
sha512sum := ""
// pointer so that omitempty works (we don't want size for
// directories or symlinks)
var size *int64
if info.Mode().IsRegular() {
sha512sum, err = helpers.Sha512sum(path)
if err != nil {
return nil, err
}
fsize := info.Size()
size = &fsize
}
// major/minor handling
device := ""
major, minor, err := helpers.MajorMinor(info)
if err == nil {
device = fmt.Sprintf("%v,%v", major, minor)
}
if buildDir != "" {
path = path[len(buildDir)+1:]
}
return &fileHash{
Name: path,
Size: size,
Sha512: sha512sum,
Device: device,
// FIXME: not portable, this output is different on
// windows, macos
Mode: newYamlFileMode(info.Mode()),
}, nil
}
func writeHashes(buildDir, dataTar string) error {
debianDir := filepath.Join(buildDir, "DEBIAN")
os.MkdirAll(debianDir, 0755)
hashes := hashesYaml{}
sha512, err := helpers.Sha512sum(dataTar)
if err != nil {
return err
}
hashes.ArchiveSha512 = sha512
err = filepath.Walk(buildDir, func(path string, info os.FileInfo, err error) error {
// path will always start with buildDir...
if path[len(buildDir):] == "/DEBIAN" {
return filepath.SkipDir
}
// ...so if path's length is == buildDir, it's buildDir
if len(path) == len(buildDir) {
return nil
}
hash, err := hashForFile(buildDir, path, info)
if err != nil {
return err
}
hashes.Files = append(hashes.Files, hash)
return nil
})
if err != nil {
return err
}
content, err := yaml.Marshal(hashes)
if err != nil {
return err
}
return ioutil.WriteFile(filepath.Join(debianDir, "hashes.yaml"), []byte(content), 0644)
}