Merge pull request #80 from hanachin/docker-hub-automated-build

Add Docker Hub automated build hook

lib/hooks/docker-hub/help.html.haml

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+%dl
+  %dt Usage
+  %dd
+    See <a href="https://docs.docker.com/docker-hub/webhooks/" target="_blank">Webhooks for automated builds | Docker Documentation</a>.

lib/hooks/docker-hub/hook.rb

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+module Idobata::Hook
+  class DockerHub < Base
+    screen_name 'Docker Hub'
+    icon_url hook_image_url('mono_vertical_small_resized.png')
+  end
+end

lib/hooks/docker-hub/templates/default.html.haml

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+%div
+  #{payload.push_data.pusher} pushed <a href="#{payload.repository.repo_url}">#{payload.repository.repo_name}</a>:#{payload.push_data.tag}

spec/docker_hub_spec.rb

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+describe Idobata::Hook::DockerHub, type: :hook do
+  let(:payload) { fixture_payload('docker_hub.json') }
+
+  before do
+    post payload, 'Content-Type' => 'application/json'
+  end
+
+  describe '#process_payload' do
+    subject { hook.process_payload }
+
+    its([:source]) { should eq(<<-HTML.strip_heredoc) }
+      <div>
+        hanachin pushed <a href="https://hub.docker.com/r/hanachin/tmp_docker_hub_webhook">hanachin/tmp_docker_hub_webhook</a>:latest
+      </div>
+    HTML
+    its([:format]) { should eq(:html) }
+  end
+end

spec/fixtures/payload/docker_hub.json

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+{"push_data": {"pushed_at": 1496850959, "images": [], "tag": "latest", "pusher": "hanachin"}, "callback_url": "https://registry.hub.docker.com/u/hanachin/tmp_docker_hub_webhook/hook/2111hfhgcfee04ca5cefbcjbg115c5f42/", "repository": {"status": "Active", "description": "the image to confirm webhook", "is_trusted": true, "full_description": null, "repo_url": "https://hub.docker.com/r/hanachin/tmp_docker_hub_webhook", "owner": "hanachin", "is_official": false, "is_private": false, "name": "tmp_docker_hub_webhook", "namespace": "hanachin", "star_count": 0, "comment_count": 0, "date_created": 1496582049, "dockerfile": "FROM alpine\n\nRUN echo hi\n", "repo_name": "hanachin/tmp_docker_hub_webhook"}}