cmd/safcm-remote/main.go

   1 // Helper copied to the remote hosts to run commands and deploy configuration
   2
   3 // Copyright (C) 2021  Simon Ruderich
   4 //
   5 // This program is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU 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 General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 package main
  19
  20 import (
  21         "fmt"
  22         "log"
  23         "os"
  24
  25         "ruderich.org/simon/safcm"
  26         "ruderich.org/simon/safcm/cmd/safcm-remote/ainsl"
  27         "ruderich.org/simon/safcm/cmd/safcm-remote/info"
  28         "ruderich.org/simon/safcm/cmd/safcm-remote/run"
  29         "ruderich.org/simon/safcm/cmd/safcm-remote/sync"
  30 )
  31
  32 func main() {
  33         // Timestamps are added by `safcm`
  34         log.SetFlags(0)
  35
  36         var err error
  37         if len(os.Args) == 1 {
  38                 err = mainLoop()
  39         } else if len(os.Args) >= 2 && os.Args[1] == "ainsl" {
  40                 err = ainsl.Main(os.Args)
  41         } else {
  42                 log.Fatalf("usage: %[1]s\n"+
  43                         "usage: %[1]s ainsl [options] <path> <line>",
  44                         os.Args[0])
  45         }
  46
  47         if err != nil {
  48                 log.Fatalf("%s: %v", os.Args[0], err)
  49         }
  50 }
  51
  52 func mainLoop() error {
  53         conn := safcm.NewGobConn(os.Stdin, os.Stdout)
  54
  55         var logLevel safcm.LogLevel
  56         logFunc := func(level safcm.LogLevel, format string, a ...interface{}) {
  57                 if logLevel >= level {
  58                         conn.Send(safcm.MsgLog{
  59                                 Level: level,
  60                                 Text:  fmt.Sprintf(format, a...),
  61                         })
  62                 }
  63         }
  64
  65         var quitResp safcm.MsgQuitResp
  66         for {
  67                 x, err := conn.Recv()
  68                 if err != nil {
  69                         return err
  70                 }
  71
  72                 var resp safcm.Msg
  73                 switch x := x.(type) {
  74                 case safcm.MsgInfoReq:
  75                         logLevel = x.LogLevel // set log level globally
  76                         resp = info.Handle(x, run.ExecRunner{}, logFunc)
  77                 case safcm.MsgSyncReq:
  78                         resp = sync.Handle(x, run.ExecRunner{}, logFunc)
  79                 case safcm.MsgQuitReq:
  80                         resp = quitResp
  81                 default:
  82                         return fmt.Errorf("unsupported message %#v", x)
  83                 }
  84
  85                 err = conn.Send(resp)
  86                 if err != nil {
  87                         return err
  88                 }
  89                 if resp == quitResp {
  90                         break
  91                 }
  92         }
  93         return nil
  94 }