// Main file for nsscash
-// Copyright (C) 2019 Simon Ruderich
+// Copyright (C) 2019-2020 Simon Ruderich
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
package main
import (
+ "bytes"
+ "flag"
+ "fmt"
+ "io/ioutil"
"log"
"os"
+ "path/filepath"
+
+ "github.com/google/renameio"
)
func main() {
- if len(os.Args) != 2 {
- log.SetFlags(0)
- log.Fatalf("usage: %s <path/to/config>\n", os.Args[0])
+ 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()
+ }
+ flag.Parse()
+
+ args := flag.Args()
+ if len(args) == 0 {
+ flag.Usage()
+ os.Exit(1)
}
- cfg, err := LoadConfig(os.Args[1])
+ switch args[0] {
+ case "fetch":
+ if len(args) != 2 {
+ break
+ }
+
+ 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
+}
+
+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 {
+ 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)
+ }
+
+ // 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 := renameio.TempFile(filepath.Dir(dstPath), dstPath)
+ if err != nil {
+ return err
+ }
+ defer f.Cleanup()
- err = WriteStateIfChanged(cfg.StatePath, state)
+ err = deployFile(&File{
+ Type: t,
+ Url: srcPath,
+ Path: f.Name(),
+ body: x.Bytes(),
+ })
if err != nil {
- log.Fatal(err)
+ return err
}
+
+ return f.CloseAtomicallyReplace()
}