package main
import (
+ "bytes"
"flag"
"fmt"
+ "io/ioutil"
"log"
"os"
+ "path/filepath"
)
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr,
"usage: %[1]s [options] fetch <config>\n"+
+ "usage: %[1]s [options] convert <type> <src> <dst>\n"+
"",
os.Args[0])
flag.PrintDefaults()
break
}
- cfg, err := LoadConfig(args[1])
+ err := mainFetch(args[1])
+ if err != nil {
+ log.Fatal(err)
+ }
+ return
+
+ case "convert":
+ if len(args) != 4 {
+ break
+ }
+
+ err := mainConvert(args[1], args[2], args[3])
+ if err != nil {
+ log.Fatal(err)
+ }
+ return
+ }
+
+ flag.Usage()
+ os.Exit(1)
+}
+
+func mainFetch(cfgPath string) error {
+ cfg, err := LoadConfig(cfgPath)
if err != nil {
- log.Fatal(err)
+ return err
}
state, err := LoadState(cfg.StatePath)
if err != nil {
- log.Fatal(err)
+ return err
}
-
err = handleFiles(cfg, state)
if err != nil {
- log.Fatal(err)
+ 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
+}
- err = WriteStateIfChanged(cfg.StatePath, state)
+func mainConvert(typ, srcPath, dstPath string) error {
+ var t FileType
+ err := t.UnmarshalText([]byte(typ))
if err != nil {
- log.Fatal(err)
+ return err
}
- return
+ 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 {
+ return err
+ }
+ err = SerializePasswds(&x, pws)
+ if err != nil {
+ return err
+ }
+ } else if t == FileTypeGroup {
+ grs, err := ParseGroups(bytes.NewReader(src))
+ if err != nil {
+ return err
+ }
+ err = SerializeGroups(&x, grs)
+ if err != nil {
+ return err
+ }
+ } 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)
}