ingress: pass context with event bus to SMTP mail parser

The SMTP session handler calls ParseMail with context.Background()
which does not carry the EventBus. When Commit() tries to enqueue
pending events, it dereferences a nil pointer and panics. The --stdin
and --mbox paths already use the proper context.

Store the context (with the bus) in the backend struct and pass it
through to ParseMail.

Fixes: bc70c37 ("events: add event bus")
Signed-off-by: Robin Jarry <robin@jarry.cc>

Author: rjarry

cmd/pw/ingress/main.go

@@ -82,6 +82,7 @@ func (c *CLI) Run(ctx *pw.Context) error {
 	}
 
 	be := &backend{
+		ctx:      ctx.Context,
 		database: ctx.DB,
 		cfg:      ctx.Config,
 		listID:   c.ListID,
@@ -141,6 +142,7 @@ func startSMTPServer(cfg *config.Config, be smtp.Backend) (net.Listener, *smtp.S
 }
 
 type backend struct {
+	ctx      context.Context
 	database *bun.DB
 	cfg      *config.Config
 	listID   string
@@ -223,7 +225,7 @@ func (s *session) Data(r io.Reader) error {
 		entity.Header.Get("Subject"))
 
 	err = mail.ParseMail(
-		context.Background(), s.backend.database,
+		s.backend.ctx, s.backend.database,
 		bytes.NewReader(data), s.backend.listID,
 	)
 	if err != nil {