Add more prepublish checks

4 files changed, 215 insertions, 22 deletions

diff --git a/packages/monorepo-scripts/src/utils/changelog_utils.ts b/packages/monorepo-scripts/src/utils/changelog_utils.ts
index edfe65a80..4e09fc842 100644
--- a/packages/monorepo-scripts/src/utils/changelog_utils.ts
+++ b/packages/monorepo-scripts/src/utils/changelog_utils.ts
@@ -1,8 +1,15 @@
+import * as fs from 'fs';
 import * as _ from 'lodash';
 import * as moment from 'moment';
+import * as path from 'path';
+import { exec as execAsync } from 'promisify-child-process';
+import semverSort = require('semver-sort');
 
+import { constants } from '../constants';
 import { Change, Changelog, VersionChangelog } from '../types';
 
+import { semverUtils } from './semver_utils';
+
 const CHANGELOG_MD_HEADER = `
 <!--
 This file is auto-generated using the monorepo-scripts package. Don't edit directly.
@@ -44,12 +51,58 @@ export const changelogUtils = {
 
         return changelogMd;
     },
-    shouldAddNewChangelogEntry(currentVersion: string, changelog: Changelog): boolean {
+    shouldAddNewChangelogEntry(packageName: string, currentVersion: string, changelog: Changelog): boolean {
         if (_.isEmpty(changelog)) {
             return true;
         }
         const lastEntry = changelog[0];
+        if (semverUtils.lessThan(lastEntry.version, currentVersion)) {
+            throw new Error(
+                `Found CHANGELOG version lower then current package version. ${packageName} current: ${currentVersion}, Changelog: ${
+                    lastEntry.version
+                }`,
+            );
+        }
         const isLastEntryCurrentVersion = lastEntry.version === currentVersion;
         return isLastEntryCurrentVersion;
     },
+    getChangelogJSONIfExists(changelogPath: string): string | undefined {
+        try {
+            const changelogJSON = fs.readFileSync(changelogPath, 'utf-8');
+            return changelogJSON;
+        } catch (err) {
+            return undefined;
+        }
+    },
+    getChangelogOrCreateIfMissing(packageName: string, packageLocation: string): Changelog {
+        const changelogJSONPath = path.join(packageLocation, 'CHANGELOG.json');
+        let changelogJsonIfExists = this.getChangelogJSONIfExists(changelogJSONPath);
+        if (_.isUndefined(changelogJsonIfExists)) {
+            // If none exists, create new, empty one.
+            changelogJsonIfExists = '[]';
+            fs.writeFileSync(changelogJSONPath, changelogJsonIfExists);
+        }
+        let changelog: Changelog;
+        try {
+            changelog = JSON.parse(changelogJsonIfExists);
+        } catch (err) {
+            throw new Error(`${packageName}'s CHANGELOG.json contains invalid JSON. Please fix and try again.`);
+        }
+        return changelog;
+    },
+    async writeChangelogJsonFileAsync(packageLocation: string, changelog: Changelog): Promise<void> {
+        const changelogJSONPath = path.join(packageLocation, 'CHANGELOG.json');
+        fs.writeFileSync(changelogJSONPath, JSON.stringify(changelog, null, '\t'));
+        await this.prettifyAsync(changelogJSONPath, constants.monorepoRootPath);
+    },
+    async writeChangelogMdFileAsync(packageLocation: string, changelog: Changelog): Promise<void> {
+        const changelogMarkdownPath = path.join(packageLocation, 'CHANGELOG.md');
+        fs.writeFileSync(changelogMarkdownPath, JSON.stringify(changelog, null, '\t'));
+        await this.prettifyAsync(changelogMarkdownPath, constants.monorepoRootPath);
+    },
+    async prettifyAsync(filePath: string, cwd: string): Promise<void> {
+        await execAsync(`prettier --write ${filePath} --config .prettierrc`, {
+            cwd,
+        });
+    },
 };
diff --git a/packages/monorepo-scripts/src/utils/npm_utils.ts b/packages/monorepo-scripts/src/utils/npm_utils.ts
new file mode 100644
index 000000000..cc1e046e7
--- /dev/null
+++ b/packages/monorepo-scripts/src/utils/npm_utils.ts
@@ -0,0 +1,28 @@
+import 'isomorphic-fetch';
+import * as _ from 'lodash';
+
+import { PackageRegistryJson } from '../types';
+
+const NPM_REGISTRY_BASE_URL = 'https://registry.npmjs.org';
+const SUCCESS_STATUS = 200;
+const NOT_FOUND_STATUS = 404;
+
+export const npmUtils = {
+    async getPackageRegistryJsonIfExistsAsync(packageName: string): Promise<PackageRegistryJson | undefined> {
+        const url = `${NPM_REGISTRY_BASE_URL}/${packageName}`;
+        const response = await fetch(url);
+
+        if (response.status === NOT_FOUND_STATUS) {
+            return undefined;
+        } else if (response.status !== SUCCESS_STATUS) {
+            throw new Error(`Request to ${url} failed. Check your internet connection and that npmjs.org is up.`);
+        }
+        const packageRegistryJson = await response.json();
+        return packageRegistryJson;
+    },
+    getPreviouslyPublishedVersions(packageRegistryJson: PackageRegistryJson): string[] {
+        const timeWithOnlyVersions = _.omit(packageRegistryJson.time, ['modified', 'created']);
+        const versions = _.keys(timeWithOnlyVersions);
+        return versions;
+    },
+};
diff --git a/packages/monorepo-scripts/src/utils/semver_utils.ts b/packages/monorepo-scripts/src/utils/semver_utils.ts
new file mode 100644
index 000000000..d5c6b2d17
--- /dev/null
+++ b/packages/monorepo-scripts/src/utils/semver_utils.ts
@@ -0,0 +1,56 @@
+import * as _ from 'lodash';
+import semverSort = require('semver-sort');
+
+// Regex that matches semantic versions only including digits and dots.
+const SEM_VER_REGEX = /^(\d+\.){1}(\d+\.){1}(\d+){1}$/gm;
+
+export const semverUtils = {
+    /**
+     * Checks whether version a is lessThan version b. Supplied versions must be
+     * Semantic Versions containing only numbers and dots (e.g 1.4.0).
+     * @param a version of interest
+     * @param b version to compare a against
+     * @return Whether version a is lessThan version b
+     */
+    lessThan(a: string, b: string): boolean {
+        this.assertValidSemVer('a', a);
+        this.assertValidSemVer('b', b);
+        if (a === b) {
+            return false;
+        }
+        const sortedVersions = semverSort.desc([a, b]);
+        const isALessThanB = sortedVersions[0] === b;
+        return isALessThanB;
+    },
+    /**
+     * Checks whether version a is greaterThan version b. Supplied versions must be
+     * Semantic Versions containing only numbers and dots (e.g 1.4.0).
+     * @param a version of interest
+     * @param b version to compare a against
+     * @return Whether version a is greaterThan version b
+     */
+    greaterThan(a: string, b: string): boolean {
+        this.assertValidSemVer('a', a);
+        this.assertValidSemVer('b', b);
+        if (a === b) {
+            return false;
+        }
+        const sortedVersions = semverSort.desc([a, b]);
+        const isAGreaterThanB = sortedVersions[0] === a;
+        return isAGreaterThanB;
+    },
+    assertValidSemVer(variableName: string, version: string): void {
+        if (!version.match(SEM_VER_REGEX)) {
+            throw new Error(
+                `SemVer versions should only contain numbers and dots. Encountered: ${variableName} = ${version}`,
+            );
+        }
+    },
+    getLatestVersion(versions: string[]): string {
+        _.each(versions, version => {
+            this.assertValidSemVer('version', version);
+        });
+        const sortedVersions = semverSort.desc(versions);
+        return sortedVersions[0];
+    },
+};
diff --git a/packages/monorepo-scripts/src/utils/utils.ts b/packages/monorepo-scripts/src/utils/utils.ts
index 0b8ac4c0b..93de0d940 100644
--- a/packages/monorepo-scripts/src/utils/utils.ts
+++ b/packages/monorepo-scripts/src/utils/utils.ts
@@ -1,10 +1,11 @@
-import * as fs from 'fs';
 import lernaGetPackages = require('lerna-get-packages');
 import * as _ from 'lodash';
 import { exec as execAsync } from 'promisify-child-process';
 
 import { constants } from '../constants';
-import { UpdatedPackage } from '../types';
+import { GitTagsByPackageName, UpdatedPackage } from '../types';
+
+import { changelogUtils } from './changelog_utils';
 
 export const utils = {
     log(...args: any[]): void {
@@ -17,11 +18,6 @@ export const utils = {
         const newPatchVersion = `${versionSegments[0]}.${versionSegments[1]}.${newPatch}`;
         return newPatchVersion;
     },
-    async prettifyAsync(filePath: string, cwd: string): Promise<void> {
-        await execAsync(`prettier --write ${filePath} --config .prettierrc`, {
-            cwd,
-        });
-    },
     async getUpdatedLernaPackagesAsync(shouldIncludePrivate: boolean): Promise<LernaPackage[]> {
         const updatedPublicPackages = await this.getLernaUpdatedPackagesAsync(shouldIncludePrivate);
         const updatedPackageNames = _.map(updatedPublicPackages, pkg => pkg.name);
@@ -43,22 +39,82 @@ export const utils = {
         }
         return updatedPackages;
     },
-    getChangelogJSONIfExists(changelogPath: string): string | undefined {
-        try {
-            const changelogJSON = fs.readFileSync(changelogPath, 'utf-8');
-            return changelogJSON;
-        } catch (err) {
-            return undefined;
+    async getNextPackageVersionAsync(
+        currentVersion: string,
+        packageName: string,
+        packageLocation: string,
+    ): Promise<string> {
+        let nextVersion;
+        const changelog = changelogUtils.getChangelogOrCreateIfMissing(packageName, packageLocation);
+        if (_.isEmpty(changelog)) {
+            nextVersion = this.getNextPatchVersion(currentVersion);
         }
+        const lastEntry = changelog[0];
+        nextVersion =
+            lastEntry.version === currentVersion ? this.getNextPatchVersion(currentVersion) : lastEntry.version;
+        return nextVersion;
+    },
+    async getRemoteGitTagsAsync(): Promise<string[]> {
+        const result = await execAsync(`git ls-remote --tags`, {
+            cwd: constants.monorepoRootPath,
+        });
+        const tagsString = result.stdout;
+        const tagOutputs: string[] = tagsString.split('\n');
+        const tags = _.compact(
+            _.map(tagOutputs, tagOutput => {
+                const tag = tagOutput.split('refs/tags/')[1];
+                // Tags with `^{}` are duplicateous so we ignore them
+                // Source: https://stackoverflow.com/questions/15472107/when-listing-git-ls-remote-why-theres-after-the-tag-name
+                if (_.endsWith(tag, '^{}')) {
+                    return undefined;
+                }
+                return tag;
+            }),
+        );
+        return tags;
+    },
+    async getLocalGitTagsAsync(): Promise<string[]> {
+        const result = await execAsync(`git tags`, {
+            cwd: constants.monorepoRootPath,
+        });
+        const tagsString = result.stdout;
+        const tags = tagsString.split('\n');
+        return tags;
     },
-    getChangelogJSONOrCreateIfMissing(changelogPath: string): string {
-        const changelogIfExists = this.getChangelogJSONIfExists(changelogPath);
-        if (_.isUndefined(changelogIfExists)) {
-            // If none exists, create new, empty one.
-            const emptyChangelogJSON = JSON.stringify([]);
-            fs.writeFileSync(changelogPath, emptyChangelogJSON);
-            return emptyChangelogJSON;
+    async getGitTagsByPackageNameAsync(packageNames: string[], gitTags: string[]): Promise<GitTagsByPackageName> {
+        const tagVersionByPackageName: GitTagsByPackageName = {};
+        _.each(gitTags, tag => {
+            const packageNameIfExists = _.find(packageNames, name => {
+                return _.includes(tag, `${name}@`);
+            });
+            if (_.isUndefined(packageNameIfExists)) {
+                return; // ignore tags not related to a package we care about.
+            }
+            const splitTag = tag.split(`${packageNameIfExists}@`);
+            if (splitTag.length !== 2) {
+                throw new Error(`Unexpected tag name found: ${tag}`);
+            }
+            const version = splitTag[1];
+            (tagVersionByPackageName[packageNameIfExists] || (tagVersionByPackageName[packageNameIfExists] = [])).push(
+                version,
+            );
+        });
+        return tagVersionByPackageName;
+    },
+    async removeLocalTagAsync(tagName: string): Promise<void> {
+        const result = await execAsync(`git tag -d ${tagName}`, {
+            cwd: constants.monorepoRootPath,
+        });
+        if (!_.isEmpty(result.stderr)) {
+            throw new Error(`Failed to delete local git tag. Got err: ${result.stderr}`);
+        }
+    },
+    async removeRemoteTagAsync(tagName: string): Promise<void> {
+        const result = await execAsync(`git push origin ${tagName}`, {
+            cwd: constants.monorepoRootPath,
+        });
+        if (!_.isEmpty(result.stderr)) {
+            throw new Error(`Failed to delete remote git tag. Got err: ${result.stderr}`);
         }
-        return changelogIfExists;
     },
 };