Docker 0.10.0: Add --output flag to docker save (as well as tag suppo…

…rt), closes #117

CHANGELOG.md

@@ -24,6 +24,7 @@ Attributes now available for all docker daemon flags as well as system IP forwar
 * REMOVED: container_dns* attributes (use replacement dns* attributes on daemon for all containers or docker_container dns* attributes instead)
 * DEPRECATED: bind_* attributes to match docker terminology (use host attribute instead)
 * Enhancement: [#115][]: Add IP forwarding attributes
+* Enhancement: [#117][]: Docker 0.10.0: Add --output flag to docker save (as well as tag support)
 * Enhancement: [#118][]: Docker 0.10.0: Add --input flag to docker load
 * Enhancement: [#119][]: Docker 0.10.0: Add support for --env-file to load environment variables from files
 * Enhancement: [#124][]: Add all docker daemon options as attributes
@@ -447,6 +448,7 @@ Lots of community contributions this release -- thanks!
 [#112]: https://github.com/bflad/chef-docker/issues/112
 [#113]: https://github.com/bflad/chef-docker/issues/113
 [#115]: https://github.com/bflad/chef-docker/issues/115
+[#117]: https://github.com/bflad/chef-docker/issues/117
 [#118]: https://github.com/bflad/chef-docker/issues/118
 [#119]: https://github.com/bflad/chef-docker/issues/119
 [#124]: https://github.com/bflad/chef-docker/issues/124

README.md

@@ -733,9 +733,19 @@ These attributes are associated with this LWRP action.
 
 Attribute | Description | Type | Default
 ----------|-------------|------|--------
-destination | Destination path | String | nil
+destination | Destination path (via stdout) | String | nil
+output | Destination path (via file) | String | nil
 
-Save repository to path:
+Save repository via file to path:
+
+```ruby
+docker_image 'test' do
+  destination '/path/to/test.tar'
+  action :save
+end
+```
+
+Save repository via stdout to path:
 
 ```ruby
 docker_image 'test' do

providers/image.rb

@@ -230,7 +230,14 @@ def repository_and_tag_args
 end
 
 def save
-  docker_cmd!("save #{new_resource.image_name} > #{new_resource.destination}")
+  if new_resource.output
+    save_args = cli_args(
+      'output' => new_resource.output
+    )
+    docker_cmd!("save #{save_args} #{repository_and_tag_args}")
+  else
+    docker_cmd!("save #{repository_and_tag_args} > #{new_resource.destination}")
+  end
 end
 
 def tag

resources/image.rb

@@ -15,6 +15,7 @@
 attribute :image_url, :kind_of => [String]
 attribute :input, :kind_of => [String]
 attribute :no_cache, :kind_of => [TrueClass, FalseClass], :default => false
+attribute :output, :kind_of => [String]
 # DEPRECATED: Use source attribute
 attribute :path, :kind_of => [String]
 attribute :registry, :kind_of => [String]