main.go

   1 // Main file for nsscash
   2
   3 // Copyright (C) 2019  Simon Ruderich
   4 //
   5 // This program is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU Affero General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU Affero General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU Affero General Public License
  16 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
  17
  18 package main
  19
  20 import (
  21         "bytes"
  22         "flag"
  23         "fmt"
  24         "io/ioutil"
  25         "log"
  26         "os"
  27 )
  28
  29 func main() {
  30         flag.Usage = func() {
  31                 fmt.Fprintf(os.Stderr,
  32                         "usage: %[1]s [options] fetch <config>\n"+
  33                                 "usage: %[1]s [options] convert <type> <src> <dst>\n"+
  34                                 "",
  35                         os.Args[0])
  36                 flag.PrintDefaults()
  37         }
  38         flag.Parse()
  39
  40         args := flag.Args()
  41         if len(args) == 0 {
  42                 flag.Usage()
  43                 os.Exit(1)
  44         }
  45
  46         switch args[0] {
  47         case "fetch":
  48                 if len(args) != 2 {
  49                         break
  50                 }
  51
  52                 mainFetch(args[1])
  53                 return
  54
  55         case "convert":
  56                 if len(args) != 4 {
  57                         break
  58                 }
  59
  60                 mainConvert(args[1], args[2], args[3])
  61                 return
  62         }
  63
  64         flag.Usage()
  65         os.Exit(1)
  66 }
  67
  68 func mainFetch(cfgPath string) {
  69                 cfg, err := LoadConfig(cfgPath)
  70                 if err != nil {
  71                         log.Fatal(err)
  72                 }
  73                 state, err := LoadState(cfg.StatePath)
  74                 if err != nil {
  75                         log.Fatal(err)
  76                 }
  77                 err = handleFiles(cfg, state)
  78                 if err != nil {
  79                         log.Fatal(err)
  80                 }
  81                 // NOTE: Make sure to call WriteState() only if there were no
  82                 // errors (see WriteState() and README)
  83                 err = WriteState(cfg.StatePath, state)
  84                 if err != nil {
  85                         log.Fatal(err)
  86                 }
  87 }
  88
  89 func mainConvert(typ, srcPath, dstPath string) {
  90                 var t FileType
  91                 err := t.UnmarshalText([]byte(typ))
  92                 if err != nil {
  93                         log.Fatal(err)
  94                 }
  95
  96                 src, err := ioutil.ReadFile(srcPath)
  97                 if err != nil {
  98                         log.Fatal(err)
  99                 }
 100                 var x bytes.Buffer
 101                 if t == FileTypePlain {
 102                         x.Write(src)
 103                 } else if t == FileTypePasswd {
 104                         pws, err := ParsePasswds(bytes.NewReader(src))
 105                         if err != nil {
 106                                 log.Fatal(err)
 107                         }
 108                         err = SerializePasswds(&x, pws)
 109                         if err != nil {
 110                                 log.Fatal(err)
 111                         }
 112                 } else if t == FileTypeGroup {
 113                         grs, err := ParseGroups(bytes.NewReader(src))
 114                         if err != nil {
 115                                 log.Fatal(err)
 116                         }
 117                         err = SerializeGroups(&x, grs)
 118                         if err != nil {
 119                                 log.Fatal(err)
 120                         }
 121                 } else {
 122                         log.Fatalf("unsupported file type %v", t)
 123                 }
 124
 125                 // We must create the file first or deployFile() will abort
 126                 f, err := os.Create(dstPath)
 127                 if err != nil {
 128                         log.Fatal(err)
 129                 }
 130                 f.Close()
 131
 132                 err = deployFile(&File{
 133                         Type: t,
 134                         Url:  srcPath,
 135                         Path: dstPath,
 136                         body: x.Bytes(),
 137                 })
 138                 if err != nil {
 139                         log.Fatal(err)
 140                 }
 141 }