First working version

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

diff --git a/cmd/safcm-remote/sync/triggers.go b/cmd/safcm-remote/sync/triggers.go
new file mode 100644 (file)
index 0000000..34aae7d
--- /dev/null
+++ b/cmd/safcm-remote/sync/triggers.go
@@ -0,0 +1,73 @@
+// MsgSyncReq: run triggers for changed files
+
+// 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 (
+       "path/filepath"
+       "strings"
+
+       "ruderich.org/simon/safcm"
+)
+
+// queueTriggers queues all triggers applying to file.
+func (s *Sync) queueTriggers(file *safcm.File) {
+       for _, path := range triggerPaths(file.Path) {
+               if s.req.Files[path].TriggerCommands == nil {
+                       continue
+               }
+               // Queue each trigger only once
+               if s.triggersActive[path] {
+                       s.log.Debugf(
+                               "files: %q: skipping trigger on %q, already active",
+                               file.Path, path)
+                       continue
+               }
+
+               s.log.Verbosef("files: %q: queuing trigger on %q",
+                       file.Path, path)
+               s.triggers = append(s.triggers, path)
+               s.triggersActive[path] = true
+       }
+}
+
+// triggerPaths returns all possible trigger paths for path, that is the path
+// itself and all parent paths. The paths are returned in reverse order so
+// more specific triggers can override effects of less specific ones (first
+// "/" or ".", then the parents and finally path itself).
+func triggerPaths(path string) []string {
+       sep := string(filepath.Separator)
+       if path == sep {
+               return []string{path}
+       } else if path == "." {
+               return []string{path}
+       }
+       parts := strings.Split(path, sep)
+       if strings.HasPrefix(path, sep) {
+               // Absolute path
+               parts[0] = sep
+       } else {
+               // Relative path
+               parts = append([]string{"."}, parts...)
+       }
+
+       var res []string
+       for i := 0; i < len(parts); i++ {
+               res = append(res, filepath.Join(parts[:i+1]...))
+       }
+       return res
+}