Refactor pipelines show for webpack bundle tag removal

app/assets/javascripts/pages/projects/pipelines/show/index.js

+
+import Vue from 'vue';
+import Flash from '../../../../flash';
+import PipelinesMediator from '../../../../pipelines/pipeline_details_mediatior';
+import pipelineGraph from '../../../../pipelines/components/graph/graph_component.vue';
+import pipelineHeader from '../../../../pipelines/components/header_component.vue';
+import eventHub from '../../../../pipelines/event_hub';
 import initPipelines from '../init_pipelines';
 
-document.addEventListener('DOMContentLoaded', initPipelines);
+document.addEventListener('DOMContentLoaded', () => {
+  const dataset = document.querySelector('.js-pipeline-details-vue').dataset;
+
+  const mediator = new PipelinesMediator({ endpoint: dataset.endpoint });
+
+  mediator.fetchPipeline();
+  initPipelines();
+
+  // eslint-disable-next-line
+  new Vue({
+    el: '#js-pipeline-graph-vue',
+    components: {
+      pipelineGraph,
+    },
+    data() {
+      return {
+        mediator,
+      };
+    },
+    render(createElement) {
+      return createElement('pipeline-graph', {
+        props: {
+          isLoading: this.mediator.state.isLoading,
+          pipeline: this.mediator.store.state.pipeline,
+        },
+      });
+    },
+  });
+
+  // eslint-disable-next-line
+  new Vue({
+    el: '#js-pipeline-header-vue',
+    components: {
+      pipelineHeader,
+    },
+    data() {
+      return {
+        mediator,
+      };
+    },
+    created() {
+      eventHub.$on('headerPostAction', this.postAction);
+    },
+    beforeDestroy() {
+      eventHub.$off('headerPostAction', this.postAction);
+    },
+    methods: {
+      postAction(action) {
+        this.mediator.service.postAction(action.path)
+          .then(() => this.mediator.refreshPipeline())
+          .catch(() => new Flash('An error occurred while making the request.'));
+      },
+    },
+    render(createElement) {
+      return createElement('pipeline-header', {
+        props: {
+          isLoading: this.mediator.state.isLoading,
+          pipeline: this.mediator.store.state.pipeline,
+        },
+      });
+    },
+  });
+});

app/views/projects/pipelines/show.html.haml

@@ -13,4 +13,3 @@
 
 - content_for :page_specific_javascripts do
   = webpack_bundle_tag('common_vue')
-  = webpack_bundle_tag('pipelines_details')