func (_ *File) RenderCloudInit(t *cloudinit.CloudInitTarget, a, e, changes *File) error {
dirMode := os.FileMode(0755)
fileMode, err := fi.ParseFileMode(fi.StringValue(e.Mode), 0644)
if err != nil {
return fmt.Errorf("invalid file mode for %q: %q", e.Path, e.Mode)
}
if e.Type == FileType_Symlink {
t.AddCommand(cloudinit.Always, "ln", "-s", fi.StringValue(e.Symlink), e.Path)
} else if e.Type == FileType_Directory {
parent := filepath.Dir(strings.TrimSuffix(e.Path, "/"))
t.AddCommand(cloudinit.Once, "mkdir", "-p", "-m", fi.FileModeToString(dirMode), parent)
t.AddCommand(cloudinit.Once, "mkdir", "-m", fi.FileModeToString(dirMode), e.Path)
} else if e.Type == FileType_File {
err = t.WriteFile(e.Path, e.Contents, fileMode, dirMode)
if err != nil {
return err
}
} else {
return fmt.Errorf("File type=%q not valid/supported", e.Type)
}
if e.Owner != nil || e.Group != nil {
t.Chown(e.Path, fi.StringValue(e.Owner), fi.StringValue(e.Group))
}
if e.OnChangeExecute != nil {
t.AddCommand(cloudinit.Always, e.OnChangeExecute...)
}
return nil
}
func (t *CloudInitTarget) WriteFile(destPath string, contents fi.Resource, fileMode os.FileMode, dirMode os.FileMode) error {
var p *fi.Source
if hs, ok := contents.(fi.HasSource); ok {
p = hs.GetSource()
}
if p != nil {
t.AddMkdirpCommand(path.Dir(destPath), dirMode)
t.fetch(p, destPath)
} else {
// TODO: No way to specify parent dir permissions?
f := &CloudConfigFile{
Encoding: "b64",
Owner: "root:root",
Permissions: fi.FileModeToString(fileMode),
Path: destPath,
}
d, err := fi.ResourceAsBytes(contents)
if err != nil {
return err
}
// Not a strict limit, just a sanity check
if len(d) > 256*1024 {
return fmt.Errorf("resource is very large (failed sanity-check): %v", contents)
}
f.Content = base64.StdEncoding.EncodeToString(d)
t.Config.WriteFiles = append(t.Config.WriteFiles, f)
}
return nil
}
func findFile(p string) (*File, error) {
stat, err := os.Lstat(p)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
}
actual := &File{}
actual.Path = p
actual.Mode = fi.String(fi.FileModeToString(stat.Mode() & os.ModePerm))
uid := int(stat.Sys().(*syscall.Stat_t).Uid)
owner, err := fi.LookupUserById(uid)
if err != nil {
return nil, err
}
if owner != nil {
actual.Owner = fi.String(owner.Name)
} else {
actual.Owner = fi.String(strconv.Itoa(uid))
}
gid := int(stat.Sys().(*syscall.Stat_t).Gid)
group, err := fi.LookupGroupById(gid)
if err != nil {
return nil, err
}
if group != nil {
actual.Group = fi.String(group.Name)
} else {
actual.Group = fi.String(strconv.Itoa(gid))
}
if (stat.Mode() & os.ModeSymlink) != 0 {
target, err := os.Readlink(p)
if err != nil {
return nil, fmt.Errorf("error reading symlink target: %v", err)
}
actual.Type = FileType_Symlink
actual.Symlink = fi.String(target)
} else if (stat.Mode() & os.ModeDir) != 0 {
actual.Type = FileType_Directory
} else {
actual.Type = FileType_File
actual.Contents = fi.NewFileResource(p)
}
return actual, nil
}
func (t *CloudInitTarget) AddMkdirpCommand(p string, dirMode os.FileMode) {
t.AddCommand(Once, "mkdir", "-p", "-m", fi.FileModeToString(dirMode), p)
}