Creates job log component

Creates vue and vuex support for new job log

Creates the new log.vue component to handle the
new format
Updates the store to use the new parser
Creates an utility function to handle the
incremental log

app/assets/javascripts/jobs/components/job_app.vue

@@ -18,6 +18,7 @@ import UnmetPrerequisitesBlock from './unmet_prerequisites_block.vue';
 import Sidebar from './sidebar.vue';
 import { sprintf } from '~/locale';
 import delayedJobMixin from '../mixins/delayed_job_mixin';
+import { isNewJobLogActive } from '../store/utils';
 
 export default {
   name: 'JobPageApp',
@@ -29,10 +30,7 @@ export default {
     EnvironmentsBlock,
     ErasedBlock,
     Icon,
-    Log: () =>
-      gon && gon.features && gon.features.jobLogJson
-        ? import('./job_log_json.vue')
-        : import('./job_log.vue'),
+    Log: () => (isNewJobLogActive() ? import('./job_log_json.vue') : import('./job_log.vue')),
     LogTopBar,
     StuckBlock,
     UnmetPrerequisitesBlock,

app/assets/javascripts/jobs/components/log/log.vue

@@ -0,0 +1,45 @@
+<script>
+import { mapState, mapActions } from 'vuex';
+import LogLine from './line.vue';
+import LogLineHeader from './line_header.vue';
+
+export default {
+  components: {
+    LogLine,
+    LogLineHeader,
+  },
+  computed: {
+    ...mapState(['traceEndpoint', 'trace']),
+  },
+  methods: {
+    ...mapActions(['toggleCollapsibleLine']),
+    handleOnClickCollapsibleLine(section) {
+      this.toggleCollapsibleLine(section);
+    },
+  },
+};
+</script>
+<template>
+  <code class="job-log">
+    <template v-for="(section, index) in trace">
+      <template v-if="section.isHeader">
+        <log-line-header
+          :key="`collapsible-${index}`"
+          :line="section.line"
+          :path="traceEndpoint"
+          :is-closed="section.isClosed"
+          @toggleLine="handleOnClickCollapsibleLine(section)"
+        />
+        <template v-if="!section.isClosed">
+          <log-line
+            v-for="line in section.lines"
+            :key="line.offset"
+            :line="line"
+            :path="traceEndpoint"
+          />
+        </template>
+      </template>
+      <log-line v-else :key="section.offset" :line="section" :path="traceEndpoint" />
+    </template>
+  </code>
+</template>

app/assets/javascripts/jobs/store/actions.js

@@ -177,6 +177,14 @@ export const receiveTraceError = ({ commit }) => {
   clearTimeout(traceTimeout);
   flash(__('An error occurred while fetching the job log.'));
 };
+/**
+ * When the user clicks a collpasible line in the job
+ * log, we commit a mutation to update the state
+ *
+ * @param {Object} section
+ */
+export const toggleCollapsibleLine = ({ commit }, section) =>
+  commit(types.TOGGLE_COLLAPSIBLE_LINE, section);
 
 /**
  * Jobs list on sidebar - depend on stages dropdown

app/assets/javascripts/jobs/store/mutation_types.js

@@ -23,6 +23,7 @@ export const REQUEST_TRACE = 'REQUEST_TRACE';
 export const STOP_POLLING_TRACE = 'STOP_POLLING_TRACE';
 export const RECEIVE_TRACE_SUCCESS = 'RECEIVE_TRACE_SUCCESS';
 export const RECEIVE_TRACE_ERROR = 'RECEIVE_TRACE_ERROR';
+export const TOGGLE_COLLAPSIBLE_LINE = 'TOGGLE_COLLAPSIBLE_LINE';
 
 export const SET_SELECTED_STAGE = 'SET_SELECTED_STAGE';
 export const REQUEST_JOBS_FOR_STAGE = 'REQUEST_JOBS_FOR_STAGE';

app/assets/javascripts/jobs/store/mutations.js

@@ -1,4 +1,6 @@
+import Vue from 'vue';
 import * as types from './mutation_types';
+import { logLinesParser, updateIncrementalTrace, isNewJobLogActive } from './utils';
 
 export default {
   [types.SET_JOB_ENDPOINT](state, endpoint) {
@@ -23,14 +25,24 @@ export default {
     }
 
     if (log.append) {
+      if (isNewJobLogActive()) {
+        state.originalTrace = state.originalTrace.concat(log.trace);
+        state.trace = updateIncrementalTrace(state.originalTrace, state.trace, log.lines);
+      } else {
         state.trace += log.html;
+      }
       state.traceSize += log.size;
     } else {
       // When the job still does not have a trace
       // the trace response will not have a defined
       // html or size. We keep the old value otherwise these
       // will be set to `undefined`
+      if (isNewJobLogActive()) {
+        state.originalTrace = log.lines || state.trace;
+        state.trace = logLinesParser(log.lines) || state.trace;
+      } else {
         state.trace = log.html || state.trace;
+      }
       state.traceSize = log.size || state.traceSize;
     }
 
@@ -57,6 +69,18 @@ export default {
     state.isTraceComplete = true;
   },
 
+  /**
+   * Instead of filtering the array of lines to find the one that must be updated
+   * we use Vue.set to make this process more performant
+   *
+   * https://vuex.vuejs.org/guide/mutations.html#mutations-follow-vue-s-reactivity-rules
+   * @param {Object} state
+   * @param {Object} section
+   */
+  [types.TOGGLE_COLLAPSIBLE_LINE](state, section) {
+    Vue.set(section, 'isClosed', !section.isClosed);
+  },
+
   [types.REQUEST_JOB](state) {
     state.isLoading = true;
   },

app/assets/javascripts/jobs/store/state.js

@@ -1,3 +1,5 @@
+import { isNewJobLogActive } from '../store/utils';
+
 export default () => ({
   jobEndpoint: null,
   traceEndpoint: null,
@@ -16,7 +18,8 @@ export default () => ({
   // Used to check if we should keep the automatic scroll
   isScrolledToBottomBeforeReceivingTrace: true,
 
-  trace: '',
+  trace: isNewJobLogActive() ? [] : '',
+  originalTrace: [],
   isTraceComplete: false,
   traceSize: 0,
   isTraceSizeVisible: false,

app/assets/javascripts/jobs/store/utils.js

@@ -11,15 +11,16 @@
  * @param {Array} lines
  * @returns {Array}
  */
-export default (lines = []) =>
+export const logLinesParser = (lines = [], lineNumberStart) =>
   lines.reduce((acc, line, index) => {
+    const lineNumber = lineNumberStart ? lineNumberStart + index : index;
     if (line.section_header) {
       acc.push({
         isClosed: true,
         isHeader: true,
         line: {
           ...line,
-          lineNumber: index,
+          lineNumber,
         },
 
         lines: [],
@@ -27,14 +28,59 @@ export default (lines = []) =>
     } else if (acc.length && acc[acc.length - 1].isHeader) {
       acc[acc.length - 1].lines.push({
         ...line,
-        lineNumber: index,
+        lineNumber,
       });
     } else {
       acc.push({
         ...line,
-        lineNumber: index,
+        lineNumber,
       });
     }
 
     return acc;
   }, []);
+
+/**
+ * When the trace is not complete, backend may send the last received line
+ * in the new response.
+ *
+ * We need to check if that is the case by looking for the offset property
+ * before parsing the incremental part
+ *
+ * @param array originalTrace
+ * @param array oldLog
+ * @param array newLog
+ */
+export const updateIncrementalTrace = (originalTrace = [], oldLog = [], newLog = []) => {
+  const firstLine = newLog[0];
+  const firstLineOffset = firstLine.offset;
+
+  // We are going to return a new array,
+  // let's make a shallow copy to make sure we
+  // are not updating the state outside of a mutation first.
+  const cloneOldLog = [...oldLog];
+
+  const lastIndex = cloneOldLog.length - 1;
+  const lastLine = cloneOldLog[lastIndex];
+
+  // The last line may be inside a collpasible section
+  // If it is, we use the not parsed saved log, remove the last element
+  // and parse the first received part togheter with the incremental log
+  if (
+    lastLine.isHeader &&
+    (lastLine.line.offset === firstLineOffset ||
+      (lastLine.lines.length &&
+        lastLine.lines[lastLine.lines.length - 1].offset === firstLineOffset))
+  ) {
+    const cloneOriginal = [...originalTrace];
+    cloneOriginal.splice(cloneOriginal.length - 1);
+    return logLinesParser(cloneOriginal.concat(newLog));
+  } else if (lastLine.offset === firstLineOffset) {
+    cloneOldLog.splice(lastIndex);
+    return cloneOldLog.concat(logLinesParser(newLog, cloneOldLog.length));
+  }
+  // there are no matches, let's parse the new log and return them together
+  return cloneOldLog.concat(logLinesParser(newLog, cloneOldLog.length));
+};
+
+export const isNewJobLogActive = () => gon && gon.features && gon.features.jobLogJson;

spec/frontend/jobs/store/mutations_spec.js

@@ -97,6 +97,14 @@ describe('Jobs Store Mutations', () => {
     });
   });
 
+  describe('TOGGLE_COLLAPSIBLE_LINE', () => {
+    it('toggles the `isClosed` property of the provided object', () => {
+      const section = { isClosed: true };
+      mutations[types.TOGGLE_COLLAPSIBLE_LINE](stateCopy, section);
+      expect(section.isClosed).toEqual(false);
+    });
+  });
+
   describe('REQUEST_JOB', () => {
     it('sets isLoading to true', () => {
       mutations[types.REQUEST_JOB](stateCopy);

spec/frontend/jobs/store/utils_spec.js

@@ -1,6 +1,7 @@
-import linesParser from '~/jobs/store/utils';
+import { logLinesParser, updateIncrementalTrace } from '~/jobs/store/utils';
 
-describe('linesParser', () => {
+describe('Jobs Store Utils', () => {
+  describe('logLinesParser', () => {
     const mockData = [
       {
         offset: 1001,
@@ -32,7 +33,7 @@ describe('linesParser', () => {
     let result;
 
     beforeEach(() => {
-    result = linesParser(mockData);
+      result = logLinesParser(mockData);
     });
 
     describe('regular line', () => {
@@ -57,4 +58,204 @@ describe('linesParser', () => {
         expect(result[1].lines[1].content).toEqual(mockData[3].content);
       });
     });
+  });
+
+  describe('updateIncrementalTrace', () => {
+    const originalTrace = [
+      {
+        offset: 1,
+        content: [
+          {
+            text: 'Downloading',
+          },
+        ],
+      },
+    ];
+
+    describe('without repeated section', () => {
+      it('concats and parses both arrays', () => {
+        const oldLog = logLinesParser(originalTrace);
+        const newLog = [
+          {
+            offset: 2,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+          },
+        ];
+        const result = updateIncrementalTrace(originalTrace, oldLog, newLog);
+
+        expect(result).toEqual([
+          {
+            offset: 1,
+            content: [
+              {
+                text: 'Downloading',
+              },
+            ],
+            lineNumber: 0,
+          },
+          {
+            offset: 2,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+            lineNumber: 1,
+          },
+        ]);
+      });
+    });
+
+    describe('with regular line repeated offset', () => {
+      it('updates the last line and formats with the incremental part', () => {
+        const oldLog = logLinesParser(originalTrace);
+        const newLog = [
+          {
+            offset: 1,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+          },
+        ];
+        const result = updateIncrementalTrace(originalTrace, oldLog, newLog);
+
+        expect(result).toEqual([
+          {
+            offset: 1,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+            lineNumber: 0,
+          },
+        ]);
+      });
+    });
+
+    describe('with header line repeated', () => {
+      it('updates the header line and formats with the incremental part', () => {
+        const headerTrace = [
+          {
+            offset: 1,
+            section_header: true,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+            sections: ['section'],
+          },
+        ];
+        const oldLog = logLinesParser(headerTrace);
+        const newLog = [
+          {
+            offset: 1,
+            section_header: true,
+            content: [
+              {
+                text: 'updated log line',
+              },
+            ],
+            sections: ['section'],
+          },
+        ];
+        const result = updateIncrementalTrace(headerTrace, oldLog, newLog);
+
+        expect(result).toEqual([
+          {
+            isClosed: true,
+            isHeader: true,
+            line: {
+              offset: 1,
+              section_header: true,
+              content: [
+                {
+                  text: 'updated log line',
+                },
+              ],
+              sections: ['section'],
+              lineNumber: 0,
+            },
+            lines: [],
+          },
+        ]);
+      });
+    });
+
+    describe('with collapsible line repeated', () => {
+      it('updates the collapsible line and formats with the incremental part', () => {
+        const collapsibleTrace = [
+          {
+            offset: 1,
+            section_header: true,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+            sections: ['section'],
+          },
+          {
+            offset: 2,
+            content: [
+              {
+                text: 'log line',
+              },
+            ],
+            sections: ['section'],
+          },
+        ];
+        const oldLog = logLinesParser(collapsibleTrace);
+        const newLog = [
+          {
+            offset: 2,
+            content: [
+              {
+                text: 'updated log line',
+              },
+            ],
+            sections: ['section'],
+          },
+        ];
+        const result = updateIncrementalTrace(collapsibleTrace, oldLog, newLog);
+
+        expect(result).toEqual([
+          {
+            isClosed: true,
+            isHeader: true,
+            line: {
+              offset: 1,
+              section_header: true,
+              content: [
+                {
+                  text: 'log line',
+                },
+              ],
+              sections: ['section'],
+              lineNumber: 0,
+            },
+            lines: [
+              {
+                offset: 2,
+                content: [
+                  {
+                    text: 'updated log line',
+                  },
+                ],
+                sections: ['section'],
+                lineNumber: 1,
+              },
+            ],
+          },
+        ]);
+      });
+    });
+  });
 });

spec/javascripts/jobs/components/log/log_spec.js

@@ -0,0 +1,77 @@
+import { mount, createLocalVue } from '@vue/test-utils';
+import Vuex from 'vuex';
+import { logLinesParser } from '~/jobs/store/utils';
+import Log from '~/jobs/components/log/log.vue';
+import { jobLog } from './mock_data';
+
+describe('Job Log', () => {
+  let wrapper;
+  let actions;
+  let state;
+  let store;
+
+  const localVue = createLocalVue();
+  localVue.use(Vuex);
+
+  const createComponent = () => {
+    wrapper = mount(Log, {
+      sync: false,
+      localVue,
+      store,
+    });
+  };
+
+  beforeEach(() => {
+    actions = {
+      toggleCollapsibleLine: () => {},
+    };
+
+    state = {
+      trace: logLinesParser(jobLog),
+      traceEndpoint: 'jobs/id',
+    };
+
+    store = new Vuex.Store({
+      actions,
+      state,
+    });
+
+    createComponent();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('line numbers', () => {
+    it('renders a line number for each open line', () => {
+      expect(wrapper.find('#L1').text()).toBe('1');
+      expect(wrapper.find('#L2').text()).toBe('2');
+      expect(wrapper.find('#L3').text()).toBe('3');
+    });
+
+    it('links to the provided path and correct line number', () => {
+      expect(wrapper.find('#L1').attributes('href')).toBe(`${state.traceEndpoint}#L1`);
+    });
+  });
+
+  describe('collapsible sections', () => {
+    it('renders a clickable header section', () => {
+      expect(wrapper.find('.collapsible-line').attributes('role')).toBe('button');
+    });
+
+    it('renders an icon with the closed state', () => {
+      expect(wrapper.find('.collapsible-line svg').classes()).toContain('ic-angle-right');
+    });
+
+    describe('on click header section', () => {
+      it('calls toggleCollapsibleLine', () => {
+        spyOn(wrapper.vm, 'toggleCollapsibleLine').and.callThrough();
+
+        wrapper.find('.collapsible-line').trigger('click');
+
+        expect(wrapper.vm.toggleCollapsibleLine).toHaveBeenCalled();
+      });
+    });
+  });
+});

spec/javascripts/jobs/components/log/mock_data.js

@@ -0,0 +1,26 @@
+// eslint-disable-next-line import/prefer-default-export
+export const jobLog = [
+  {
+    offset: 1000,
+    content: [{ text: 'Running with gitlab-runner 12.1.0 (de7731dd)' }],
+  },
+  {
+    offset: 1001,
+    content: [{ text: ' on docker-auto-scale-com 8a6210b8' }],
+  },
+  {
+    offset: 1002,
+    content: [
+      {
+        text: 'Using Docker executor with image dev.gitlab.org3',
+      },
+    ],
+    sections: ['prepare-executor'],
+    section_header: true,
+  },
+  {
+    offset: 1003,
+    content: [{ text: 'Starting service postgres:9.6.14 ...', style: 'text-green' }],
+    sections: ['prepare-executor'],
+  },
+];

spec/javascripts/jobs/store/actions_spec.js

@@ -16,6 +16,7 @@ import {
   stopPollingTrace,
   receiveTraceSuccess,
   receiveTraceError,
+  toggleCollapsibleLine,
   requestJobsForStage,
   fetchJobsForStage,
   receiveJobsForStageSuccess,
@@ -303,6 +304,19 @@ describe('Job State actions', () => {
     });
   });
 
+  describe('toggleCollapsibleLine', () => {
+    it('should commit TOGGLE_COLLAPSIBLE_LINE mutation ', done => {
+      testAction(
+        toggleCollapsibleLine,
+        { isClosed: true },
+        mockedState,
+        [{ type: types.TOGGLE_COLLAPSIBLE_LINE, payload: { isClosed: true } }],
+        [],
+        done,
+      );
+    });
+  });
+
   describe('requestJobsForStage', () => {
     it('should commit REQUEST_JOBS_FOR_STAGE mutation ', done => {
       testAction(