Create 'rig ssh' command (#159)

* Create 'rig ssh' command

* gofmt and remove flags from ssh

* cleanup the ssh return values

* ssh command: fix lint messages

* ssh command: better message if machine does not exist

cmd/main.go

@@ -66,6 +66,7 @@ func main() {
 	app.Commands = append(app.Commands, (&commands.Project{}).Commands()...)
 	app.Commands = append(app.Commands, (&commands.Doctor{}).Commands()...)
 	app.Commands = append(app.Commands, (&commands.Dev{}).Commands()...)
+	app.Commands = append(app.Commands, (&commands.SSH{}).Commands()...)
 
 	app.Run(os.Args)
 }

commands/ssh.go

@@ -0,0 +1,40 @@
+package commands
+
+import (
+	"fmt"
+	"os/exec"
+
+	"github.com/phase2/rig/util"
+	"github.com/urfave/cli"
+)
+
+// SSH is the command for staring an SSH session inside the docker machine vm
+type SSH struct {
+	BaseCommand
+}
+
+// Commands returns the operations supported by this command
+func (cmd *SSH) Commands() []cli.Command {
+	return []cli.Command{
+		{
+			Name:   "ssh",
+			Usage:  "Start an ssh session into the docker-machine vm",
+			Before: cmd.Before,
+			Action: cmd.Run,
+		},
+	}
+}
+
+// Run executes the `rig ssh` command
+func (cmd *SSH) Run(c *cli.Context) error {
+	// Does the docker-machine exist
+	if !cmd.machine.Exists() {
+		return cmd.Failure(fmt.Sprintf("No machine named '%s' exists.", cmd.machine.Name), "MACHINE-NOT-FOUND", 12)
+	}
+
+	/* #nosec */
+	if exitCode := util.PassthruCommand(exec.Command("docker-machine", "ssh", cmd.machine.Name)); exitCode != 0 {
+		return cmd.Failure(fmt.Sprintf("Failure running 'docker-machine ssh %s'", cmd.machine.Name), "COMMAND-ERROR", exitCode)
+	}
+	return cmd.Success("")
+}