Add command to start a bash session

lib/mrsk/cli/app.rb

@@ -63,6 +63,17 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
     end
   end
 
+  desc "bash", "Start a bash session on primary host"
+  option :host, desc: "Start bash on a different host"
+  def bash
+    host = options[:host] || MRSK.config.primary_host
+
+    run_locally do
+      puts "Launching bash session on #{host}..."
+      exec MRSK.app.bash(host: host)        
+    end
+  end
+
   desc "runner [EXPRESSION]", "Execute Rails runner with given expression"
   option :once, type: :boolean, default: false, desc: "Only perform runner on primary host"
   def runner(expression)

lib/mrsk/commands/app.rb

@@ -47,8 +47,9 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       *command
   end
 
-  def run_exec(*command)
+  def run_exec(*command, interactive: false)
     docker :run,
+      ("-it" if interactive),
       "--rm",
       *rails_master_key_arg,
       *config.env_args,
@@ -57,7 +58,11 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
   end
 
   def console(host: config.primary_host)
-    "ssh -t #{config.ssh_user}@#{host} '#{exec("bin/rails", "c", interactive: true).join(" ")}'"
+    exec_over_ssh "bin/rails", "c", host: host
+  end
+
+  def bash(host: config.primary_host)
+    exec_over_ssh "bash", host: host
   end
 
   def list_containers
@@ -73,6 +78,10 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
   end
 
   private
+    def exec_over_ssh(*command, host:)
+      "ssh -t #{config.ssh_user}@#{host} '#{run_exec(*command, interactive: true).join(" ")}'"
+    end
+
     def service_filter
       [ "--filter", "label=service=#{config.service}" ]
     end