Fetch Github release notes from CHANGELOG.json and update CHANGELOG once they've been successfully published to Github

packages/monorepo-scripts/src/postpublish_utils.ts

@@ -1,9 +1,12 @@
 import { execAsync } from 'async-child-process';
 import * as promisify from 'es6-promisify';
+import * as fs from 'fs';
 import * as _ from 'lodash';
+import * as path from 'path';
 import * as publishRelease from 'publish-release';
 import semverSort = require('semver-sort');
 
+import { constants } from './constants';
 import { utils } from './utils';
 
 const publishReleaseAsync = promisify(publishRelease);
@@ -88,23 +91,52 @@ export const postpublishUtils = {
         );
     },
     async publishReleaseNotesAsync(cwd: string, packageName: string, version: string, assets: string[]): Promise<void> {
+        const notes = this.getReleaseNotes(packageName);
         const releaseName = this.getReleaseName(packageName, version);
         const tag = this.getTag(packageName, version);
-        utils.log('POSTPUBLISH: Releasing ', releaseName, '...');
         const finalAssets = this.adjustAssetPaths(cwd, assets);
+        utils.log('POSTPUBLISH: Releasing ', releaseName, '...');
         const result = await publishReleaseAsync({
             token: githubPersonalAccessToken,
             owner: '0xProject',
             repo: '0x-monorepo',
             tag,
             name: releaseName,
-            notes: 'N/A',
+            notes,
             draft: false,
             prerelease: false,
             reuseRelease: true,
             reuseDraftOnly: false,
             assets,
         });
+        this.updateChangelogIsPublished(packageName);
+    },
+    getReleaseNotes(packageName: string) {
+        const changelogJSONPath = path.join(constants.monorepoRootPath, 'packages', packageName, 'CHANGELOG.json');
+        const changelogJSON = fs.readFileSync(changelogJSONPath, 'utf-8');
+        const changelogs = JSON.parse(changelogJSON);
+        const latestLog = changelogs[0];
+        if (_.isUndefined(latestLog.isPublished)) {
+            let notes = '';
+            _.each(latestLog.changes, change => {
+                notes = `* ${change.note}`;
+                if (change.pr) {
+                    notes += ` (${change.pr})`;
+                }
+                notes += `\n`;
+            });
+            return notes;
+        }
+        return 'N/A';
+    },
+    updateChangelogIsPublished(packageName: string) {
+        const changelogJSONPath = path.join(constants.monorepoRootPath, 'packages', packageName, 'CHANGELOG.json');
+        const changelogJSON = fs.readFileSync(changelogJSONPath, 'utf-8');
+        const changelogs = JSON.parse(changelogJSON);
+        const latestLog = changelogs[0];
+        latestLog.isPublished = true;
+        changelogs[0] = latestLog;
+        fs.writeFileSync(changelogJSONPath, JSON.stringify(changelogs, null, '\t'));
     },
     getTag(packageName: string, version: string) {
         return `${packageName}@${version}`;