feat(runner): support flag --stdin-registration-token

cli/cmd/runner_register.go

@@ -1,18 +1,40 @@
 package cmd
 
 import (
+	"io"
+	"os"
+
 	"github.com/ansible-semaphore/semaphore/services/runners"
 	"github.com/ansible-semaphore/semaphore/util"
 	"github.com/spf13/cobra"
 )
 
+var runnerRegisterArgs struct {
+	stdinRegistrationToken bool
+}
+
 func init() {
+	runnerRegisterCmd.PersistentFlags().BoolVar(&runnerRegisterArgs.stdinRegistrationToken, "stdin-registration-token", false, "Read registration token from stdin")
 	runnerCmd.AddCommand(runnerRegisterCmd)
 }
 
 func registerRunner() {
+
 	util.ConfigInit(configPath, noConfig)
 
+	if runnerRegisterArgs.stdinRegistrationToken {
+		tokenBytes, err := io.ReadAll(os.Stdin)
+		if err != nil {
+			panic(err)
+		}
+
+		if len(tokenBytes) == 0 {
+			panic("Empty token")
+		}
+
+		util.Config.Runner.Token = string(tokenBytes)
+	}
+
 	taskPool := runners.JobPool{}
 	err := taskPool.Register()
 	if err != nil {