providers/docker: rebuild image if it doesn't exist

plugins/providers/docker/action/build.rb

@@ -25,6 +25,12 @@ module VagrantPlugins
             image = image_file.read.chomp
           end
 
+          # Verify the image exists if we have one
+          if image && !machine.provider.driver.image?(image)
+            machine.ui.output(I18n.t("docker_provider.build_image_invalid"))
+            image = nil
+          end
+
           # If we have no image or we're rebuilding, we rebuild
           if !image || env[:build_rebuild]
             # Build it

plugins/providers/docker/driver.rb

@@ -63,6 +63,11 @@ module VagrantPlugins
         result =~ /^#{Regexp.escape cid}$/
       end
 
+      def image?(id)
+        result = execute('docker', 'images', '-q').to_s
+        result =~ /^#{Regexp.escape(id)}$/
+      end
+
       def running?(cid)
         result = execute('docker', 'ps', '-q', '--no-trunc')
         result =~ /^#{Regexp.escape cid}$/m

templates/locales/providers_docker.yml

@@ -4,6 +4,8 @@ en:
       Image is already built from the Dockerfile. `vagrant reload` to rebuild.
     build_image_destroy: |-
       Removing built image...
+    build_image_invalid: |-
+      Build image no longer exists. Rebuilding...
     building: |-
       Building the container from a Dockerfile...
     creating: |-