func executeRootScript(script []*dockerscript.Command) error {
if len(rootPlugins) > 0 {
// If there are root plugins, wrap the script inside them
var (
rootCmd *dockerscript.Command
lastCmd *dockerscript.Command
)
for _, plugin := range rootPlugins {
pluginCmd := &dockerscript.Command{
Args: []string{plugin},
}
if rootCmd == nil {
rootCmd = pluginCmd
} else {
lastCmd.Children = []*dockerscript.Command{pluginCmd}
}
lastCmd = pluginCmd
}
lastCmd.Children = script
script = []*dockerscript.Command{rootCmd}
}
handlers, err := Handlers(introspect)
if err != nil {
return err
}
defer handlers.Close()
var tasks sync.WaitGroup
defer func() {
Debugf("Waiting for introspection...\n")
tasks.Wait()
Debugf("DONE Waiting for introspection\n")
}()
if introspect != nil {
tasks.Add(1)
go func() {
Debugf("starting introspection\n")
defer Debugf("done with introspection\n")
defer tasks.Done()
introspect.Send(data.Empty().Set("cmd", "log", "stdout").Set("message", "introspection worked!").Bytes(), nil)
Debugf("XXX starting reading introspection messages\n")
r := beam.NewRouter(handlers)
r.NewRoute().All().Handler(func(p []byte, a *os.File) error {
Logf("[INTROSPECTION] %s\n", beam.MsgDesc(p, a))
return handlers.Send(p, a)
})
n, err := beam.Copy(r, introspect)
Debugf("XXX done reading %d introspection messages: %v\n", n, err)
}()
}
if err := executeScript(handlers, script); err != nil {
return err
}
return nil
}
func msgDesc(payload []byte, attachment *os.File) string {
return beam.MsgDesc(payload, attachment)
}