Generate CHANGELOG.json files and add convert_changelog script

2 files changed, 97 insertions, 0 deletions

diff --git a/packages/monorepo-scripts/src/convert_changelogs.ts b/packages/monorepo-scripts/src/convert_changelogs.ts
new file mode 100644
index 000000000..419f36ff4
--- /dev/null
+++ b/packages/monorepo-scripts/src/convert_changelogs.ts
@@ -0,0 +1,80 @@
+#!/usr/bin/env node
+
+import * as fs from 'fs';
+import lernaGetPackages = require('lerna-get-packages');
+import * as _ from 'lodash';
+import * as moment from 'moment';
+import * as path from 'path';
+
+import { Changelog, Changes, UpdatedPackage } from './types';
+import { utils } from './utils';
+
+const MONOREPO_ROOT_PATH = path.join(__dirname, '../../..');
+
+(async () => {
+    const allLernaPackages = lernaGetPackages(MONOREPO_ROOT_PATH);
+    const publicLernaPackages = _.filter(allLernaPackages, pkg => !pkg.package.private);
+    _.each(publicLernaPackages, lernaPackage => {
+        const changelogMdIfExists = getChangelogMdIfExists(lernaPackage.package.name, lernaPackage.location);
+        if (_.isUndefined(changelogMdIfExists)) {
+            throw new Error(`${lernaPackage.package.name} should have CHANGELOG.md b/c it's public. Add one.`);
+        }
+
+        const lines = (changelogMdIfExists as any).split('\n');
+        const changelogs: Changelog[] = [];
+        let changelog: Changelog = {
+            version: '',
+            changes: [],
+        };
+        for (const line of lines) {
+            if (_.startsWith(line, '## ')) {
+                const version = line.substr(4).split(' - ')[0];
+                const dateStr = line.split('_')[1];
+                let date;
+                if (!_.includes(dateStr, 'TBD')) {
+                    date = moment(dateStr, 'MMMM D, YYYY');
+                }
+                changelog = {
+                    version,
+                    changes: [],
+                };
+                if (!_.isUndefined(date)) {
+                    changelog.timestamp = date.unix();
+                }
+                if (!_.includes(dateStr, 'TBD')) {
+                    changelog.isPublished = true;
+                }
+                (changelogs as any).push(changelog);
+            } else if (_.includes(line, '* ')) {
+                const note = line.split('* ')[1].split(' (#')[0];
+                const prChunk = line.split(' (#')[1];
+                let pr;
+                if (!_.isUndefined(prChunk)) {
+                    pr = prChunk.split(')')[0];
+                }
+                const changes = {
+                    note,
+                    pr,
+                };
+                changelog.changes.push(changes);
+            }
+        }
+        const changelogJson = JSON.stringify(changelogs, null, '\t');
+        fs.writeFileSync(`${lernaPackage.location}/CHANGELOG.json`, changelogJson);
+    });
+})().catch(err => {
+    utils.log(err.stdout);
+    process.exit(1);
+});
+
+function getChangelogMdIfExists(packageName: string, location: string): string | undefined {
+    const changelogPath = path.join(location, 'CHANGELOG.md');
+    let changelogMd: string;
+    try {
+        changelogMd = fs.readFileSync(changelogPath, 'utf-8');
+        return changelogMd;
+    } catch (err) {
+        // If none exists, create new, empty one.
+        return undefined;
+    }
+}
diff --git a/packages/monorepo-scripts/src/types.ts b/packages/monorepo-scripts/src/types.ts
new file mode 100644
index 000000000..045316ab5
--- /dev/null
+++ b/packages/monorepo-scripts/src/types.ts
@@ -0,0 +1,17 @@
+export interface UpdatedPackage {
+    name: string;
+    version: string;
+    private: boolean;
+}
+
+export interface Changes {
+    note: string;
+    pr?: number;
+}
+
+export interface Changelog {
+    timestamp?: number;
+    version: string;
+    changes: Changes[];
+    isPublished?: boolean;
+}