First working version

[safcm/safcm.git] / cmd / safcm-remote / sync / commands.go

diff --git a/cmd/safcm-remote/sync/commands.go b/cmd/safcm-remote/sync/commands.go
new file mode 100644 (file)
index 0000000..abc23bc
--- /dev/null
+++ b/cmd/safcm-remote/sync/commands.go
@@ -0,0 +1,91 @@
+// MsgSyncReq: run commands on the remote host
+
+// Copyright (C) 2021  Simon Ruderich
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package sync
+
+import (
+       "fmt"
+       "os"
+       "os/exec"
+       "strings"
+
+       "ruderich.org/simon/safcm"
+       "ruderich.org/simon/safcm/cmd/safcm-remote/run"
+)
+
+func (s *Sync) syncCommands() error {
+       // Run triggered commands first
+       for _, path := range s.triggers {
+               for _, x := range s.req.Files[path].TriggerCommands {
+                       err := s.syncCommand(x, path)
+                       if err != nil {
+                               return err
+                       }
+               }
+       }
+       // Regular commands afterwards so they can react on triggers if
+       // necessary
+       for _, x := range s.req.Commands {
+               err := s.syncCommand(x, "")
+               if err != nil {
+                       return err
+               }
+       }
+       return nil
+}
+
+func (s *Sync) syncCommand(command string, trigger string) error {
+       s.resp.CommandChanges = append(s.resp.CommandChanges,
+               safcm.CommandChange{
+                       Command: command,
+                       Trigger: trigger,
+               })
+       if s.req.DryRun {
+               return nil
+       }
+       change := &s.resp.CommandChanges[len(s.resp.CommandChanges)-1]
+
+       cmd := exec.Command("/bin/sh", "-c", command)
+       cmd.Env = safcmEnviroment(s.req.Groups)
+       // Cannot use cmd.CombinedOutputCmd() because we need another log
+       // level (here the command is the actual change and not a side effect)
+       // and different error handling.
+       s.log.Verbosef("commands: running %s", run.QuoteForDebug(cmd))
+       out, err := s.cmd.Runner.CombinedOutput(cmd)
+       if len(out) > 0 {
+               s.log.Debug2f("commands: command output:\n%s", out)
+       }
+       change.Output = string(out)
+       if err != nil {
+               change.Error = err.Error()
+               return fmt.Errorf("%q failed: %v", command, err)
+       }
+
+       return nil
+}
+
+func safcmEnviroment(groups []string) []string {
+       env := os.Environ()
+       // Provide additional environment variables so commands can check
+       // group membership
+       env = append(env,
+               fmt.Sprintf("SAFCM_GROUPS=%s", strings.Join(groups, " ")))
+       for _, x := range groups {
+               env = append(env, fmt.Sprintf("SAFCM_GROUP_%s=%s", x, x))
+       }
+       return env
+}