allow to pass command via ssh

Author: abbbi

README.md

@@ -42,9 +42,7 @@ ssh -l "alpine:latest" -o StrictHostKeychecking=no localhost -p 2222
 
 # Executing scripts for CI testing
 
-Currently it is not possible to specify a command for the ssh session, but the
-`cmd` option can be used to execute an specified command within the container
-for CI testing. Example:
+Execute pre-defined scripts by using the `cmd` option:
 
 ```
  cat /tmp/ci/test.sh
@@ -58,6 +56,16 @@ for CI testing. Example:
  1
 ```
 
+or execute a command via ssh call:
+
+```
+ ssh -l "debian:bookworm" -o StrictHostKeychecking=no localhost -p 2222 ls; echo $?
+ bin   dev  home  lib64  mnt  proc  run   srv  tmp  var
+ boot  etc  lib   media  opt  root  sbin  sys  usr
+ 0
+```
+
+
 or execute script on multiple containers:
 
 ```

main.go

@@ -63,7 +63,6 @@ func main() {
 		_, _, isTty := sess.Pty()
 		cfg := &container.Config{
 			Image:        defaultImage,
-			Cmd:          sess.Command(),
 			Env:          sess.Environ(),
 			Tty:          isTty,
 			OpenStdin:    true,
@@ -165,19 +164,19 @@ func dockerRun(cfg *container.Config, hostcfg *container.HostConfig, sess ssh.Se
 	status = 255
 	cleanup = func() {}
 	ctx := context.Background()
+	useTty := true
 
 	cImage := cfg.Image
 	InfoPrint("Image: %s", cImage)
 	defaultCmd := []string{"/bin/sh", "-c", "/bin/bash || /bin/sh"}
 
+	if sess.RawCommand() != "" {
+		defaultCmd = sess.Command()
+		useTty = false
+	}
 	if cmd != "" {
 		defaultCmd = strings.Fields(cmd)
 	}
-
-	if sess.RawCommand() != "" {
-		sess.Write([]byte("not implemented, use -cmd option\n"))
-		return
-	}
 	InfoPrint("Executing command: %s", defaultCmd)
 
 	networkingConfig := network.NetworkingConfig{}
@@ -235,7 +234,7 @@ func dockerRun(cfg *container.Config, hostcfg *container.HostConfig, sess ssh.Se
 	}
 	InfoPrint("Attaching container: %s", resp.ID)
 	stream, err := docker.ContainerExecAttach(ctx, execResp.ID, container.ExecStartOptions{
-		Tty: true,
+		Tty: useTty,
 	})
 	if err != nil {
 		ErrorPrint("Error during container attach: [%v]", err.Error())