"io/ioutil"
"log"
"os"
+ "path/filepath"
)
func main() {
break
}
- cfg, err := LoadConfig(args[1])
- if err != nil {
- log.Fatal(err)
- }
- state, err := LoadState(cfg.StatePath)
- if err != nil {
- log.Fatal(err)
- }
- err = handleFiles(cfg, state)
- if err != nil {
- log.Fatal(err)
- }
- err = WriteStateIfChanged(cfg.StatePath, state)
+ err := mainFetch(args[1])
if err != nil {
log.Fatal(err)
}
break
}
- var t FileType
- err := t.UnmarshalText([]byte(args[1]))
+ err := mainConvert(args[1], args[2], args[3])
if err != nil {
log.Fatal(err)
}
+ return
+ }
- src, err := ioutil.ReadFile(args[2])
- if err != nil {
- log.Fatal(err)
- }
+ flag.Usage()
+ os.Exit(1)
+}
+
+func mainFetch(cfgPath string) error {
+ cfg, err := LoadConfig(cfgPath)
+ if err != nil {
+ return err
+ }
+ state, err := LoadState(cfg.StatePath)
+ if err != nil {
+ return err
+ }
+ err = handleFiles(cfg, state)
+ if err != nil {
+ return err
+ }
+ // NOTE: Make sure to call WriteState() only if there were no
+ // errors (see WriteState() and README)
+ err = WriteState(cfg.StatePath, state)
+ if err != nil {
+ return err
+ }
+ return nil
+}
+
+func mainConvert(typ, srcPath, dstPath string) error {
+ var t FileType
+ err := t.UnmarshalText([]byte(typ))
+ if err != nil {
+ return err
+ }
+
+ src, err := ioutil.ReadFile(srcPath)
+ if err != nil {
+ return err
+ }
+ var x bytes.Buffer
+ if t == FileTypePlain {
+ x.Write(src)
+ } else if t == FileTypePasswd {
pws, err := ParsePasswds(bytes.NewReader(src))
if err != nil {
- log.Fatal(err)
+ return err
}
- var x bytes.Buffer
err = SerializePasswds(&x, pws)
if err != nil {
- log.Fatal(err)
+ return err
}
-
- // We must create the file first or deployFile() will abort
- f, err := os.Create(args[3])
+ } else if t == FileTypeGroup {
+ grs, err := ParseGroups(bytes.NewReader(src))
if err != nil {
- log.Fatal(err)
+ return err
}
- f.Close()
-
- err = deployFile(&File{
- Type: t,
- Url: args[2],
- Path: args[3],
- body: x.Bytes(),
- })
+ err = SerializeGroups(&x, grs)
if err != nil {
- log.Fatal(err)
+ return err
}
- return
+ } else {
+ return fmt.Errorf("unsupported file type %v", t)
}
- flag.Usage()
- os.Exit(1)
+ dstDir := filepath.Dir(dstPath)
+ dstName := filepath.Base(dstPath)
+
+ // We must create the file first or deployFile() will abort; this is
+ // ugly because deployFile() already performs an atomic replacement
+ // but the simplest solution with the least duplicate code
+ f, err := ioutil.TempFile(dstDir, "tmp-"+dstName+"-")
+ if err != nil {
+ return err
+ }
+ tmpPath := f.Name()
+ defer os.Remove(tmpPath)
+ f.Close()
+
+ err = deployFile(&File{
+ Type: t,
+ Url: srcPath,
+ Path: tmpPath,
+ body: x.Bytes(),
+ })
+ if err != nil {
+ return err
+ }
+
+ return os.Rename(tmpPath, dstPath)
}