4 files changed, 105 insertions, 1 deletions
diff --git a/packages/monorepo-scripts/package.json b/packages/monorepo-scripts/package.json
index 8bf1d83e5..733a099d1 100644
--- a/packages/monorepo-scripts/package.json
+++ b/packages/monorepo-scripts/package.json
@@ -11,9 +11,11 @@
         "build": "tsc",
         "test:publish": "run-s build script:publish",
         "find_unused_deps": "run-s build script:find_unused_deps",
+        "remove_tags": "run-s build script:remove_tags",
         "script:deps_versions": "node ./lib/deps_versions.js",
         "script:publish": "IS_DRY_RUN=true node ./lib/publish.js",
-        "script:find_unused_deps": "node ./lib/find_unused_dependencies.js"
+        "script:find_unused_deps": "node ./lib/find_unused_dependencies.js",
+        "script:remove_tags": "node ./lib/remove_tags.js"
     },
     "repository": {
         "type": "git",
diff --git a/packages/monorepo-scripts/src/constants.ts b/packages/monorepo-scripts/src/constants.ts
index 081a49332..e93b27820 100644
--- a/packages/monorepo-scripts/src/constants.ts
+++ b/packages/monorepo-scripts/src/constants.ts
@@ -3,4 +3,5 @@ import * as path from 'path';
 export const constants = {
     monorepoRootPath: path.join(__dirname, '../../..'),
     stagingWebsite: 'http://staging-0xproject.s3-website-us-east-1.amazonaws.com',
+    lernaExecutable: './node_modules/lerna/bin/lerna.js',
 };
diff --git a/packages/monorepo-scripts/src/remove_tags.ts b/packages/monorepo-scripts/src/remove_tags.ts
new file mode 100644
index 000000000..a91c6ec39
--- /dev/null
+++ b/packages/monorepo-scripts/src/remove_tags.ts
@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+
+import lernaGetPackages = require('lerna-get-packages');
+import * as _ from 'lodash';
+import * as path from 'path';
+import { exec as execAsync } from 'promisify-child-process';
+import semverSort = require('semver-sort');
+
+import { constants } from './constants';
+import { Changelog } from './types';
+import { utils } from './utils';
+
+(async () => {
+    const shouldIncludePrivate = true;
+    const updatedPublicLernaPackages = await utils.getUpdatedLernaPackagesAsync(shouldIncludePrivate);
+
+    for (const lernaPackage of updatedPublicLernaPackages) {
+        const packageName = lernaPackage.package.name;
+        const currentVersion = lernaPackage.package.version;
+        const changelogJSONPath = path.join(lernaPackage.location, 'CHANGELOG.json');
+        const changelogJSONIfExists = utils.getChangelogJSONIfExists(changelogJSONPath);
+
+        let latestChangelogVersion: string;
+        if (!_.isUndefined(changelogJSONIfExists)) {
+            let changelogs: Changelog[];
+            try {
+                changelogs = JSON.parse(changelogJSONIfExists);
+            } catch (err) {
+                throw new Error(
+                    `${lernaPackage.package.name}'s CHANGELOG.json contains invalid JSON. Please fix and try again.`,
+                );
+            }
+            latestChangelogVersion = changelogs[0].version;
+        } else {
+            latestChangelogVersion = utils.getNextPatchVersion(currentVersion);
+        }
+
+        const sortedVersions = semverSort.desc([latestChangelogVersion, currentVersion]);
+        if (sortedVersions[0] === latestChangelogVersion && latestChangelogVersion !== currentVersion) {
+            const tagName = `${packageName}@${latestChangelogVersion}`;
+            try {
+                await execAsync(`git tag -d ${tagName}`, { cwd: constants.monorepoRootPath });
+                utils.log(`removed tag: ${tagName}`);
+            } catch (err) {
+                if (_.includes(err.message, 'not found')) {
+                    utils.log(`Could not find tag: ${tagName}`);
+                } else {
+                    throw err;
+                }
+            }
+        }
+    }
+})().catch(err => {
+    utils.log(err);
+    process.exit(1);
+});
diff --git a/packages/monorepo-scripts/src/utils.ts b/packages/monorepo-scripts/src/utils.ts
index 9aa37e272..3a16bf91d 100644
--- a/packages/monorepo-scripts/src/utils.ts
+++ b/packages/monorepo-scripts/src/utils.ts
@@ -1,6 +1,11 @@
+import * as fs from 'fs';
+import lernaGetPackages = require('lerna-get-packages');
 import * as _ from 'lodash';
 import { exec as execAsync, spawn } from 'promisify-child-process';
 
+import { constants } from './constants';
+import { UpdatedPackage } from './types';
+
 export const utils = {
     log(...args: any[]): void {
         console.log(...args); // tslint:disable-line:no-console
@@ -17,4 +22,44 @@ export const utils = {
             cwd,
         });
     },
+    async getUpdatedLernaPackagesAsync(shouldIncludePrivate: boolean): Promise<LernaPackage[]> {
+        const updatedPublicPackages = await this.getLernaUpdatedPackagesAsync(shouldIncludePrivate);
+        const updatedPackageNames = _.map(updatedPublicPackages, pkg => pkg.name);
+
+        const allLernaPackages = lernaGetPackages(constants.monorepoRootPath);
+        const updatedPublicLernaPackages = _.filter(allLernaPackages, pkg => {
+            return _.includes(updatedPackageNames, pkg.package.name);
+        });
+        return updatedPublicLernaPackages;
+    },
+    async getLernaUpdatedPackagesAsync(shouldIncludePrivate: boolean): Promise<UpdatedPackage[]> {
+        const result = await execAsync(`${constants.lernaExecutable} updated --json`, {
+            cwd: constants.monorepoRootPath,
+        });
+        const updatedPackages = JSON.parse(result.stdout);
+        if (!shouldIncludePrivate) {
+            const updatedPublicPackages = _.filter(updatedPackages, updatedPackage => !updatedPackage.private);
+            return updatedPublicPackages;
+        }
+        return updatedPackages;
+    },
+    getChangelogJSONIfExists(changelogPath: string) {
+        let changelogJSON: string;
+        try {
+            changelogJSON = fs.readFileSync(changelogPath, 'utf-8');
+            return changelogJSON;
+        } catch (err) {
+            return undefined;
+        }
+    },
+    getChangelogJSONOrCreateIfMissing(changelogPath: string): string {
+        const changelogIfExists = this.getChangelogJSONIfExists(changelogPath);
+        if (_.isUndefined(changelogIfExists)) {
+            // If none exists, create new, empty one.
+            const emptyChangelogJSON = JSON.stringify([], null, 4);
+            fs.writeFileSync(changelogPath, emptyChangelogJSON);
+            return emptyChangelogJSON;
+        }
+        return changelogIfExists;
+    },
 };