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                 cfg, err := LoadConfig(args[1])
  53                 if err != nil {
  54                         log.Fatal(err)
  55                 }
  56                 state, err := LoadState(cfg.StatePath)
  57                 if err != nil {
  58                         log.Fatal(err)
  59                 }
  60                 err = handleFiles(cfg, state)
  61                 if err != nil {
  62                         log.Fatal(err)
  63                 }
  64                 // NOTE: Make sure to call WriteState() only if there were no
  65                 // errors (see WriteState() and README)
  66                 err = WriteState(cfg.StatePath, state)
  67                 if err != nil {
  68                         log.Fatal(err)
  69                 }
  70                 return
  71
  72         case "convert":
  73                 if len(args) != 4 {
  74                         break
  75                 }
  76
  77                 var t FileType
  78                 err := t.UnmarshalText([]byte(args[1]))
  79                 if err != nil {
  80                         log.Fatal(err)
  81                 }
  82
  83                 src, err := ioutil.ReadFile(args[2])
  84                 if err != nil {
  85                         log.Fatal(err)
  86                 }
  87                 var x bytes.Buffer
  88                 if t == FileTypePlain {
  89                         x.Write(src)
  90                 } else if t == FileTypePasswd {
  91                         pws, err := ParsePasswds(bytes.NewReader(src))
  92                         if err != nil {
  93                                 log.Fatal(err)
  94                         }
  95                         err = SerializePasswds(&x, pws)
  96                         if err != nil {
  97                                 log.Fatal(err)
  98                         }
  99                 } else if t == FileTypeGroup {
 100                         grs, err := ParseGroups(bytes.NewReader(src))
 101                         if err != nil {
 102                                 log.Fatal(err)
 103                         }
 104                         err = SerializeGroups(&x, grs)
 105                         if err != nil {
 106                                 log.Fatal(err)
 107                         }
 108                 } else {
 109                         log.Fatalf("unsupported file type %v", t)
 110                 }
 111
 112                 // We must create the file first or deployFile() will abort
 113                 f, err := os.Create(args[3])
 114                 if err != nil {
 115                         log.Fatal(err)
 116                 }
 117                 f.Close()
 118
 119                 err = deployFile(&File{
 120                         Type: t,
 121                         Url:  args[2],
 122                         Path: args[3],
 123                         body: x.Bytes(),
 124                 })
 125                 if err != nil {
 126                         log.Fatal(err)
 127                 }
 128                 return
 129         }
 130
 131         flag.Usage()
 132         os.Exit(1)
 133 }