Remove all in-package monorepo-scripts by adding doc gen/upload and aggregate release note publishing to publish script

5 files changed, 318 insertions, 208 deletions

diff --git a/packages/monorepo-scripts/package.json b/packages/monorepo-scripts/package.json
index 128bdcff5..24f1607c0 100644
--- a/packages/monorepo-scripts/package.json
+++ b/packages/monorepo-scripts/package.json
@@ -17,7 +17,8 @@
         "script:deps_versions": "node ./lib/deps_versions.js",
         "script:prepublish_checks": "node ./lib/prepublish_checks.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:doc_generate_and_upload": "node ./lib/doc_generate_and_upload.js"
     },
     "repository": {
         "type": "git",
@@ -38,8 +39,7 @@
         "make-promises-safe": "^1.1.0",
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
-        "tslint": "5.11.0",
-        "typescript": "2.7.1"
+        "tslint": "5.11.0"
     },
     "dependencies": {
         "@lerna/batch-packages": "^3.0.0-beta.18",
@@ -58,7 +58,9 @@
         "rimraf": "^2.6.2",
         "semver": "5.5.0",
         "semver-diff": "^2.1.0",
-        "semver-sort": "0.0.4"
+        "semver-sort": "0.0.4",
+        "typedoc": "0xProject/typedoc",
+        "typescript": "2.7.1"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/monorepo-scripts/src/doc_generate_and_upload.ts b/packages/monorepo-scripts/src/doc_generate_and_upload.ts
new file mode 100644
index 000000000..b6a4801e3
--- /dev/null
+++ b/packages/monorepo-scripts/src/doc_generate_and_upload.ts
@@ -0,0 +1,215 @@
+import { readFileSync, writeFileSync } from 'fs';
+import * as _ from 'lodash';
+import * as path from 'path';
+import { exec as execAsync } from 'promisify-child-process';
+import * as ts from 'typescript';
+import * as yargs from 'yargs';
+
+import { constants } from './constants';
+import { utils } from './utils/utils';
+
+export interface ExportPathToExportedItems {
+    [pkgName: string]: string[];
+}
+
+const args = yargs
+    .option('package', {
+        describe: 'Monorepo sub-package for which to generate DocJSON',
+        type: 'string',
+        demandOption: true,
+    })
+    .option('isStaging', {
+        describe: 'Whether we with to publish docs to staging or production',
+        type: 'boolean',
+        demandOption: true,
+    })
+    .example("$0 --package '0x.js' --isStaging true", 'Full usage example').argv;
+
+(async () => {
+    const packageName = args.package;
+    const isStaging = args.isStaging;
+
+    await generateAndUploadDocsAsync(packageName, isStaging);
+})();
+
+export async function generateAndUploadDocsAsync(packageName: string, isStaging: boolean): Promise<void> {
+    const pathToPackage = `${constants.monorepoRootPath}/packages/${packageName}`;
+    const indexPath = `${pathToPackage}/src/index.ts`;
+    const exportPathToExportedItems = getExportPathToExportedItems(indexPath);
+
+    const monorepoPackages = utils.getPackages(constants.monorepoRootPath);
+    const pkg = _.find(monorepoPackages, monorepoPackage => {
+        return _.includes(monorepoPackage.packageJson.name, packageName);
+    });
+    if (_.isUndefined(pkg)) {
+        throw new Error(`Couldn't find a package.json for ${packageName}`);
+    }
+
+    const packageJson = pkg.packageJson;
+    const shouldPublishDocs = !!_.get(packageJson, 'config.postpublish.shouldPublishDocs');
+    if (!shouldPublishDocs) {
+        utils.log(
+            `GENERATE_UPLOAD_DOCS: ${
+                packageJson.name
+            } packageJson.config.postpublish.shouldPublishDocs is false. Skipping doc JSON generation.`,
+        );
+        return;
+    }
+
+    const pkgNameToPath: { [name: string]: string } = {};
+    _.each(monorepoPackages, pkg => {
+        pkgNameToPath[pkg.packageJson.name] = pkg.location;
+    });
+
+    // For each dep that is another one of our monorepo packages, we fetch it's index.ts
+    // and see which specific files we must pass to TypeDoc.
+    let typeDocExtraFileIncludes: string[] = [];
+    _.each(exportPathToExportedItems, (exportedItems, exportPath) => {
+        const isInternalToPkg = _.startsWith(exportPath, '.');
+        if (isInternalToPkg) {
+            const pathToInternalPkg = path.join(pathToPackage, 'src', `${exportPath}.ts`);
+            typeDocExtraFileIncludes.push(pathToInternalPkg);
+        }
+        const pathIfExists = pkgNameToPath[exportPath];
+        if (_.isUndefined(pathIfExists)) {
+            return; // It's an external package
+        }
+        const typeDocSourceIncludes = new Set();
+        const pathToIndex = `${pathIfExists}/src/index.ts`;
+        const innerExportPathToExportedItems = getExportPathToExportedItems(pathToIndex);
+        _.each(exportedItems, exportName => {
+            _.each(innerExportPathToExportedItems, (innerExportItems, innerExportPath) => {
+                if (!_.startsWith(innerExportPath, './')) {
+                    // noop. Not an internal export... but rather an external one. Should we follow it?
+                    return;
+                }
+                if (_.includes(innerExportItems, exportName)) {
+                    const absoluteSrcPath = path.join(pathIfExists, 'src', `${innerExportPath}.ts`);
+                    typeDocSourceIncludes.add(absoluteSrcPath);
+                }
+            });
+        });
+        // @0xproject/types & ethereum-types are examples of packages where their index.ts exports types
+        // directly, meaning no internal paths will exist to follow. This, we add the index file.
+        // TODO: Maybe we should add the index for all packages?
+        if (typeDocSourceIncludes.size === 0) {
+            typeDocSourceIncludes.add(pathToIndex);
+        }
+        typeDocExtraFileIncludes = [...typeDocExtraFileIncludes, ...Array.from(typeDocSourceIncludes)];
+    });
+
+    // Generate Typedoc JSON file
+    const jsonFilePath = path.join(pathToPackage, 'generated_docs', 'index.json');
+    const projectFiles = typeDocExtraFileIncludes.join(' ');
+    const cwd = path.join(constants.monorepoRootPath, 'packages/0x.js/');
+    // HACK: For some reason calling `typedoc` command directly from here, even with `cwd` set to the
+    // packages root dir, does not work. It only works when called via a `package.json` script located
+    // in the packages root.
+    await execAsync(`JSON_FILE_PATH=${jsonFilePath} PROJECT_FILES="${projectFiles}" yarn docs:json`, {
+        cwd,
+    });
+
+    // For each entry, see if it was exported in index.ts. If not, remove it.
+    const typedocOutputString = readFileSync(jsonFilePath).toString();
+    const typedocOutput = JSON.parse(typedocOutputString);
+    const finalTypeDocOutput = _.clone(typedocOutput);
+    _.each(typedocOutput.children, (file, i) => {
+        const exportItems = findExportItemsGivenTypedocName(exportPathToExportedItems, packageName, file.name);
+        // Map file "name" to exportPath... HOW?!
+        _.each(file.children, (child, j) => {
+            if (!_.includes(exportItems, child.name)) {
+                delete finalTypeDocOutput.children[i].children[j];
+            }
+        });
+        finalTypeDocOutput.children[i].children = _.compact(finalTypeDocOutput.children[i].children);
+    });
+    // Write modified TypeDoc JSON, without all the unexported stuff
+    writeFileSync(jsonFilePath, JSON.stringify(finalTypeDocOutput, null, 2));
+
+    const fileName = `v${packageJson.version}.json`;
+    utils.log(`GENERATE_UPLOAD_DOCS: Doc generation successful, uploading docs... as ${fileName}`);
+    const S3BucketPath = isStaging ? `s3://staging-doc-jsons/${packageName}/` : `s3://doc-jsons/${packageName}/`;
+    const s3Url = `${S3BucketPath}${fileName}`;
+    await execAsync(
+        `aws s3 cp ${jsonFilePath} ${s3Url} --profile 0xproject --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers --content-type application/json`,
+        {
+            cwd,
+        },
+    );
+    utils.log(`GENERATE_UPLOAD_DOCS: Docs uploaded to S3 bucket: ${S3BucketPath}`);
+    // Remove the generated docs directory
+    await execAsync(`rm -rf ${jsonFilePath}`, {
+        cwd,
+    });
+}
+
+function findExportItemsGivenTypedocName(
+    exportPathToExportedItems: ExportPathToExportedItems,
+    packageName: string,
+    typedocName: string,
+): string[] {
+    const typeDocNameWithoutQuotes = _.replace(typedocName, '"', '');
+    const sanitizedExportPathToExportPath: { [sanitizedName: string]: string } = {};
+    const exportPaths = _.keys(exportPathToExportedItems);
+    const sanitizedExportPaths = _.map(exportPaths, exportPath => {
+        if (_.startsWith(exportPath, './')) {
+            const sanitizedExportPath = path.join(packageName, 'src', exportPath);
+            sanitizedExportPathToExportPath[sanitizedExportPath] = exportPath;
+            return sanitizedExportPath;
+        }
+        const monorepoPrefix = '@0xproject/';
+        if (_.startsWith(exportPath, monorepoPrefix)) {
+            const sanitizedExportPath = exportPath.split(monorepoPrefix)[1];
+            sanitizedExportPathToExportPath[sanitizedExportPath] = exportPath;
+            return sanitizedExportPath;
+        }
+        sanitizedExportPathToExportPath[exportPath] = exportPath;
+        return exportPath;
+    });
+    const matchingSanitizedExportPathIfExists = _.find(sanitizedExportPaths, p => {
+        return _.startsWith(typeDocNameWithoutQuotes, p);
+    });
+    if (_.isUndefined(matchingSanitizedExportPathIfExists)) {
+        throw new Error(`Didn't find an exportPath for ${typeDocNameWithoutQuotes}`);
+    }
+    const matchingExportPath = sanitizedExportPathToExportPath[matchingSanitizedExportPathIfExists];
+    return exportPathToExportedItems[matchingExportPath];
+}
+
+function getExportPathToExportedItems(pkgPath: string): ExportPathToExportedItems {
+    const sourceFile = ts.createSourceFile(
+        'indexFile',
+        readFileSync(pkgPath).toString(),
+        ts.ScriptTarget.ES2017,
+        /*setParentNodes */ true,
+    );
+    const exportPathToExportedItems = _getExportPathToExportedItems(sourceFile);
+    return exportPathToExportedItems;
+}
+
+function _getExportPathToExportedItems(sf: ts.SourceFile): ExportPathToExportedItems {
+    const exportPathToExportedItems: ExportPathToExportedItems = {};
+    processNode(sf);
+
+    function processNode(node: ts.Node): void {
+        switch (node.kind) {
+            case ts.SyntaxKind.ExportDeclaration:
+                // console.log(node);
+                const exportClause = (node as any).exportClause;
+                const pkgName = exportClause.parent.moduleSpecifier.text;
+                _.each(exportClause.elements, element => {
+                    exportPathToExportedItems[pkgName] = _.isUndefined(exportPathToExportedItems[pkgName])
+                        ? [element.name.escapedText]
+                        : [...exportPathToExportedItems[pkgName], element.name.escapedText];
+                });
+                break;
+
+            default:
+                // noop
+                break;
+        }
+
+        ts.forEachChild(node, processNode);
+    }
+    return exportPathToExportedItems;
+}
diff --git a/packages/monorepo-scripts/src/index.ts b/packages/monorepo-scripts/src/index.ts
index 95c96ebe8..e69de29bb 100644
--- a/packages/monorepo-scripts/src/index.ts
+++ b/packages/monorepo-scripts/src/index.ts
@@ -1 +0,0 @@
-export { postpublishUtils } from './postpublish_utils';
diff --git a/packages/monorepo-scripts/src/postpublish_utils.ts b/packages/monorepo-scripts/src/postpublish_utils.ts
deleted file mode 100644
index 8e445a045..000000000
--- a/packages/monorepo-scripts/src/postpublish_utils.ts
+++ /dev/null
@@ -1,202 +0,0 @@
-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 { constants } from './constants';
-import { configs } from './utils/configs';
-import { utils } from './utils/utils';
-
-const publishReleaseAsync = promisify(publishRelease);
-const generatedDocsDirectoryName = 'generated_docs';
-
-export interface PostpublishConfigs {
-    cwd: string;
-    packageName: string;
-    version: string;
-    assets: string[];
-    docPublishConfigs: DocPublishConfigs;
-}
-
-export interface DocPublishConfigs {
-    fileIncludes: string[];
-    s3BucketPath: string;
-    s3StagingBucketPath: string;
-}
-
-export const postpublishUtils = {
-    generateConfig(packageJSON: any, tsConfigJSON: any, cwd: string): PostpublishConfigs {
-        if (_.isUndefined(packageJSON.name)) {
-            throw new Error('name field required in package.json. Cannot publish release notes to Github.');
-        }
-        if (_.isUndefined(packageJSON.version)) {
-            throw new Error('version field required in package.json. Cannot publish release notes to Github.');
-        }
-        const postpublishConfig = _.get(packageJSON, 'config.postpublish', {});
-        const postpublishConfigs: PostpublishConfigs = {
-            cwd,
-            packageName: packageJSON.name,
-            version: packageJSON.version,
-            assets: _.get(postpublishConfig, 'assets', []),
-            docPublishConfigs: {
-                fileIncludes: [
-                    ...tsConfigJSON.include,
-                    ..._.get(postpublishConfig, 'docPublishConfigs.extraFileIncludes', []),
-                ],
-                s3BucketPath: _.get(postpublishConfig, 'docPublishConfigs.s3BucketPath'),
-                s3StagingBucketPath: _.get(postpublishConfig, 'docPublishConfigs.s3StagingBucketPath'),
-            },
-        };
-        return postpublishConfigs;
-    },
-    async runAsync(packageJSON: any, tsConfigJSON: any, cwd: string): Promise<void> {
-        if (configs.IS_LOCAL_PUBLISH) {
-            return;
-        }
-        const postpublishConfigs = postpublishUtils.generateConfig(packageJSON, tsConfigJSON, cwd);
-        await postpublishUtils.publishReleaseNotesAsync(
-            postpublishConfigs.packageName,
-            postpublishConfigs.version,
-            postpublishConfigs.assets,
-        );
-        if (
-            !_.isUndefined(postpublishConfigs.docPublishConfigs.s3BucketPath) ||
-            !_.isUndefined(postpublishConfigs.docPublishConfigs.s3StagingBucketPath)
-        ) {
-            utils.log('POSTPUBLISH: Release successful, generating docs...');
-            await postpublishUtils.generateAndUploadDocsAsync(
-                postpublishConfigs.cwd,
-                postpublishConfigs.docPublishConfigs.fileIncludes,
-                postpublishConfigs.version,
-                postpublishConfigs.docPublishConfigs.s3BucketPath,
-            );
-        } else {
-            utils.log(`POSTPUBLISH: No S3Bucket config found for ${packageJSON.name}. Skipping doc JSON generation.`);
-        }
-    },
-    async publishDocsToStagingAsync(packageJSON: any, tsConfigJSON: any, cwd: string): Promise<void> {
-        const postpublishConfigs = postpublishUtils.generateConfig(packageJSON, tsConfigJSON, cwd);
-        if (_.isUndefined(postpublishConfigs.docPublishConfigs.s3StagingBucketPath)) {
-            utils.log('config.postpublish.docPublishConfigs.s3StagingBucketPath entry in package.json not found!');
-            return;
-        }
-
-        utils.log('POSTPUBLISH: Generating docs...');
-        await postpublishUtils.generateAndUploadDocsAsync(
-            postpublishConfigs.cwd,
-            postpublishConfigs.docPublishConfigs.fileIncludes,
-            postpublishConfigs.version,
-            postpublishConfigs.docPublishConfigs.s3StagingBucketPath,
-        );
-    },
-    async publishReleaseNotesAsync(packageName: string, version: string, assets: string[]): Promise<void> {
-        const notes = postpublishUtils.getReleaseNotes(packageName, version);
-        const releaseName = postpublishUtils.getReleaseName(packageName, version);
-        const tag = postpublishUtils.getTag(packageName, version);
-        postpublishUtils.adjustAssetPaths(assets);
-        utils.log('POSTPUBLISH: Releasing ', releaseName, '...');
-        await publishReleaseAsync({
-            token: constants.githubPersonalAccessToken,
-            owner: '0xProject',
-            repo: '0x-monorepo',
-            tag,
-            name: releaseName,
-            notes,
-            draft: false,
-            prerelease: false,
-            reuseRelease: true,
-            reuseDraftOnly: false,
-            assets,
-        });
-    },
-    getReleaseNotes(packageName: string, version: string): string {
-        const packageNameWithNamespace = packageName.replace('@0xproject/', '');
-        const changelogJSONPath = path.join(
-            constants.monorepoRootPath,
-            'packages',
-            packageNameWithNamespace,
-            'CHANGELOG.json',
-        );
-        const changelogJSON = fs.readFileSync(changelogJSONPath, 'utf-8');
-        const changelogs = JSON.parse(changelogJSON);
-        const latestLog = changelogs[0];
-        // We sanity check that the version for the changelog notes we are about to publish to Github
-        // correspond to the new version of the package.
-        if (version !== latestLog.version) {
-            throw new Error('Expected CHANGELOG.json latest entry version to coincide with published version.');
-        }
-        let notes = '';
-        _.each(latestLog.changes, change => {
-            notes += `* ${change.note}`;
-            if (change.pr) {
-                notes += ` (#${change.pr})`;
-            }
-            notes += `\n`;
-        });
-        return notes;
-    },
-    getTag(packageName: string, version: string): string {
-        return `${packageName}@${version}`;
-    },
-    getReleaseName(subPackageName: string, version: string): string {
-        const releaseName = `${subPackageName} v${version}`;
-        return releaseName;
-    },
-    // Asset paths should described from the monorepo root. This method prefixes
-    // the supplied path with the absolute path to the monorepo root.
-    adjustAssetPaths(assets: string[]): string[] {
-        const finalAssets: string[] = [];
-        _.each(assets, (asset: string) => {
-            finalAssets.push(`${constants.monorepoRootPath}/${asset}`);
-        });
-        return finalAssets;
-    },
-    adjustFileIncludePaths(fileIncludes: string[], cwd: string): string[] {
-        const fileIncludesAdjusted = _.map(fileIncludes, fileInclude => {
-            let includePath = _.startsWith(fileInclude, './')
-                ? `${cwd}/${fileInclude.substr(2)}`
-                : `${cwd}/${fileInclude}`;
-
-            // HACK: tsconfig.json needs wildcard directory endings as `/**/*`
-            // but TypeDoc needs it as `/**` in order to pick up files at the root
-            if (_.endsWith(includePath, '/**/*')) {
-                // tslint:disable-next-line:custom-no-magic-numbers
-                includePath = includePath.slice(0, -2);
-            }
-            return includePath;
-        });
-        return fileIncludesAdjusted;
-    },
-    async generateAndUploadDocsAsync(
-        cwd: string,
-        fileIncludes: string[],
-        version: string,
-        S3BucketPath: string,
-    ): Promise<void> {
-        const fileIncludesAdjusted = postpublishUtils.adjustFileIncludePaths(fileIncludes, cwd);
-        const projectFiles = fileIncludesAdjusted.join(' ');
-        const jsonFilePath = `${cwd}/${generatedDocsDirectoryName}/index.json`;
-        const result = await execAsync(
-            `JSON_FILE_PATH=${jsonFilePath} PROJECT_FILES="${projectFiles}" yarn docs:json`,
-            {
-                cwd,
-            },
-        );
-        if (!_.isEmpty(result.stderr)) {
-            throw new Error(result.stderr);
-        }
-        const fileName = `v${version}.json`;
-        utils.log(`POSTPUBLISH: Doc generation successful, uploading docs... as ${fileName}`);
-        const s3Url = S3BucketPath + fileName;
-        await execAsync(`S3_URL=${s3Url} yarn upload_docs_json`, {
-            cwd,
-        });
-        // Remove the generated docs directory
-        await execAsync(`rm -rf ${generatedDocsDirectoryName}`, {
-            cwd,
-        });
-        utils.log(`POSTPUBLISH: Docs uploaded to S3 bucket: ${S3BucketPath}`);
-    },
-};
diff --git a/packages/monorepo-scripts/src/publish.ts b/packages/monorepo-scripts/src/publish.ts
index 5992131db..7444c64b1 100644
--- a/packages/monorepo-scripts/src/publish.ts
+++ b/packages/monorepo-scripts/src/publish.ts
@@ -8,12 +8,16 @@ import { exec as execAsync } from 'promisify-child-process';
 import * as prompt from 'prompt';
 import semver = require('semver');
 import semverSort = require('semver-sort');
+import * as publishRelease from 'publish-release';
+
+const publishReleaseAsync = promisify(publishRelease);
 
 import { constants } from './constants';
 import { Package, PackageToNextVersion, VersionChangelog } from './types';
 import { changelogUtils } from './utils/changelog_utils';
 import { configs } from './utils/configs';
 import { utils } from './utils/utils';
+import { generateAndUploadDocsAsync } from './doc_generate_and_upload';
 
 const DOC_GEN_COMMAND = 'docs:json';
 const NPM_NAMESPACE = '@0xproject/';
@@ -70,15 +74,27 @@ const packageNameToWebsitePath: { [name: string]: string } = {
     });
     utils.log(`Calling 'lerna publish'...`);
     await lernaPublishAsync(packageToNextVersion);
+    const isStaging = false;
+    await generateAndUploadDocJsonsAsync(updatedPublicPackages, isStaging);
+    await publishReleaseNotesAsync(updatedPublicPackages);
 })().catch(err => {
     utils.log(err);
     process.exit(1);
 });
 
+async function generateAndUploadDocJsonsAsync(updatedPublicPackages: Package[], isStaging: boolean) {
+    for (const pkg of updatedPublicPackages) {
+        const packageName = pkg.packageJson.name;
+        const nameWithoutPrefix = packageName.replace('@0xproject/', '');
+        await generateAndUploadDocsAsync(nameWithoutPrefix, isStaging);
+    }
+}
+
 async function confirmDocPagesRenderAsync(packages: Package[]): Promise<void> {
     // push docs to staging
     utils.log("Upload all docJson's to S3 staging...");
-    await execAsync(`yarn stage_docs`, { cwd: constants.monorepoRootPath });
+    const isStaging = true;
+    await generateAndUploadDocJsonsAsync(packages, isStaging);
 
     // deploy website to staging
     utils.log('Deploy website to staging...');
@@ -178,6 +194,86 @@ async function updateChangeLogsAsync(updatedPublicPackages: Package[]): Promise<
     return packageToNextVersion;
 }
 
+async function publishReleaseNotesAsync(updatedPublishPackages: Package[]): Promise<void> {
+    // Git push a tag representing this publish (publish-{commit-hash}) (truncate hash)
+    const result = await execAsync('git log -n 1 --pretty=format:"%H"', { cwd: constants.monorepoRootPath });
+    const latestGitCommit = result.stdout;
+    const shortenedGitCommit = latestGitCommit.slice(0, 7);
+    const tagName = `monorepo@${shortenedGitCommit}`;
+    // TODO: We might need to handle the case where the tag already exists locally
+    await execAsync('git tag ${tagName}');
+    await execAsync('git push origin ${tagName}');
+    const releaseName = `0x monorepo - ${shortenedGitCommit}`;
+
+    let assets: string[] = [];
+    let aggregateNotes = '';
+    _.each(updatedPublishPackages, pkg => {
+        const notes = getReleaseNotesForPackage(pkg.packageJson.name, pkg.packageJson.version);
+        aggregateNotes += `### ${pkg.packageJson.name}@${pkg.packageJson.version}\n${notes}\n\n`;
+
+        const packageAssets = _.get(pkg.packageJson, 'config.postpublish.assets');
+        if (!_.isUndefined(packageAssets)) {
+            assets = [...assets, ...packageAssets];
+        }
+    });
+    adjustAssetPaths(assets);
+
+    utils.log('PUBLISH: Releasing ', releaseName, '...');
+    // TODO: Currently publish-release doesn't let you specify the labels for each asset uploaded
+    // Ideally we would like to name the assets after the package they are from
+    // Source: https://github.com/remixz/publish-release/issues/39
+    await publishReleaseAsync({
+        token: constants.githubPersonalAccessToken,
+        owner: '0xProject',
+        tag: tagName,
+        repo: '0x-monorepo',
+        name: releaseName,
+        notes: aggregateNotes,
+        draft: false,
+        prerelease: false,
+        reuseRelease: true,
+        reuseDraftOnly: false,
+        assets,
+    });
+}
+
+// Asset paths should described from the monorepo root. This method prefixes
+// the supplied path with the absolute path to the monorepo root.
+function adjustAssetPaths(assets: string[]): string[] {
+    const finalAssets: string[] = [];
+    _.each(assets, (asset: string) => {
+        finalAssets.push(`${constants.monorepoRootPath}/${asset}`);
+    });
+    return finalAssets;
+}
+
+function getReleaseNotesForPackage(packageName: string, version: string): string {
+    const packageNameWithoutNamespace = packageName.replace('@0xproject/', '');
+    const changelogJSONPath = path.join(
+        constants.monorepoRootPath,
+        'packages',
+        packageNameWithoutNamespace,
+        'CHANGELOG.json',
+    );
+    const changelogJSON = fs.readFileSync(changelogJSONPath, 'utf-8');
+    const changelogs = JSON.parse(changelogJSON);
+    const latestLog = changelogs[0];
+    // We sanity check that the version for the changelog notes we are about to publish to Github
+    // correspond to the new version of the package.
+    if (version !== latestLog.version) {
+        throw new Error('Expected CHANGELOG.json latest entry version to coincide with published version.');
+    }
+    let notes = '';
+    _.each(latestLog.changes, change => {
+        notes += `* ${change.note}`;
+        if (change.pr) {
+            notes += ` (#${change.pr})`;
+        }
+        notes += `\n`;
+    });
+    return notes;
+}
+
 async function lernaPublishAsync(packageToNextVersion: { [name: string]: string }): Promise<void> {
     const packageVersionString = _.map(packageToNextVersion, (nextVersion: string, packageName: string) => {
         return `${packageName}@${nextVersion}`;