WIP: action to download a remote file to the local computer

Author: seawolf

app/turbulence/gcloud/actions.rb

@@ -9,6 +9,7 @@ module Actions
         TailLogsSingleContainer,
         TailLogsAllContainers,
         ForwardPort,
+        DownloadFile,
         RestartDeployment,
         DestroyNamespace
       ].freeze

app/turbulence/gcloud/actions/download_file.rb

@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+module Turbulence
+  module GCloud
+    module Actions
+      # Access a command line / console for a container
+      class DownloadFile
+        ID = :download_file
+        NAME = 'Download a file from a Pod to your computer'
+
+        include ActionResources
+
+        def run
+          project
+          cluster
+          namespace
+          pod
+          container
+          remote_file_name
+          download_destination
+
+          PROMPT.ok("\nConnecting...\n")
+          download && \
+            PROMPT.ok("\nThe file is now in the Downloads folder of your Turbulence installation.")
+        end
+
+        private
+
+        def remote_file_name
+          return @remote_file_name if defined?(@remote_file_name)
+
+          remote_file = PROMPT.ask('Full path and filename of remote file: (e.g. /tmp/my-file)', required: true)
+
+          @remote_file_path = File.dirname(remote_file)
+          @remote_file_name = File.basename(remote_file)
+        end
+
+        def download_destination
+          system('[ -d ./Downloads ] || mkdir Downloads')
+        end
+
+        def command
+          "kubectl cp -n #{namespace.name} -c #{container.name} #{pod.id}:#{remote_file_name} ./Downloads/#{remote_file_name}".tap { puts _1 }
+        end
+
+        def download
+          system(command)
+        end
+      end
+    end
+  end
+end