chore: run typescript build as part of typecheck, not normal build

CHANGELOG.md

@@ -8,7 +8,7 @@
 
 ### Chore & Maintenance
 
-- `[*]`: Setup building, linting and testing of TypeScript ([#7808](https://github.com/facebook/jest/pull/7808))
+- `[*]`: Setup building, linting and testing of TypeScript ([#7808](https://github.com/facebook/jest/pull/7808), [#7855](https://github.com/facebook/jest/pull/7855))
 - `[pretty-format]`: Migrate to TypeScript ([#7809](https://github.com/facebook/jest/pull/7809))
 - `[diff-sequences]`: Migrate to Typescript ([#7820](https://github.com/facebook/jest/pull/7820))
 - `[jest-get-type]`: Migrate to TypeScript ([#7818](https://github.com/facebook/jest/pull/7818))

package.json

@@ -84,14 +84,14 @@
     "lint:md": "yarn --silent lint:md:ci --fix",
     "lint:md:ci": "prettylint '**/*.{md,yml,yaml}' --ignore-path .gitignore",
     "postinstall": "opencollective postinstall && yarn build",
-    "publish": "yarn build-clean && yarn build && lerna publish --silent",
+    "publish": "yarn build-clean && yarn typecheck && yarn build && lerna publish --silent",
     "test-ci-es5-build-in-browser": "karma start --single-run",
     "test-ci": "yarn jest-coverage -i --config jest.config.ci.js && yarn test-leak && node scripts/mapCoverage.js && codecov",
     "test-ci-partial": "yarn jest -i --config jest.config.ci.js",
     "test-pretty-format-perf": "node packages/pretty-format/perf/test.js",
     "test-leak": "yarn jest -i --detectLeaks jest-mock jest-diff jest-repl",
     "test": "yarn typecheck && yarn lint && yarn jest",
-    "typecheck": "flow check --include-warnings",
+    "typecheck": "node scripts/buildTs.js && flow check --include-warnings",
     "watch": "yarn build && node ./scripts/watch.js"
   },
   "workspaces": {

scripts/build.js

@@ -24,17 +24,14 @@ const fs = require('fs');
 const path = require('path');
 const glob = require('glob');
 const mkdirp = require('mkdirp');
-const execa = require('execa');
 
 const babel = require('@babel/core');
 const chalk = require('chalk');
 const micromatch = require('micromatch');
 const prettier = require('prettier');
-const stringLength = require('string-length');
-const getPackages = require('./getPackages');
+const {getPackages, adjustToTerminalWidth, OK} = require('./buildUtils');
 const browserBuild = require('./browserBuild');
 
-const OK = chalk.reset.inverse.bold.green(' DONE ');
 const SRC_DIR = 'src';
 const BUILD_DIR = 'build';
 const BUILD_ES5_DIR = 'build-es5';
@@ -51,20 +48,6 @@ const prettierConfig = prettier.resolveConfig.sync(__filename);
 prettierConfig.trailingComma = 'none';
 prettierConfig.parser = 'babel';
 
-const adjustToTerminalWidth = str => {
-  const columns = process.stdout.columns || 80;
-  const WIDTH = columns - stringLength(OK) + 1;
-  const strs = str.match(new RegExp(`(.{1,${WIDTH}})`, 'g'));
-  let lastString = strs[strs.length - 1];
-  if (lastString.length < WIDTH) {
-    lastString += Array(WIDTH - lastString.length).join(chalk.dim('.'));
-  }
-  return strs
-    .slice(0, -1)
-    .concat(lastString)
-    .join('\n');
-};
-
 function getPackageName(file) {
   return path.relative(PACKAGES_DIR, file).split(path.sep)[0];
 }
@@ -191,21 +174,10 @@ function buildFile(file, silent) {
 
 const files = process.argv.slice(2);
 
-function compileTypes(packages) {
-  const packageWithTs = packages.filter(p =>
-    fs.existsSync(path.resolve(p, 'tsconfig.json'))
-  );
-
-  execa.sync('tsc', ['-b', ...packageWithTs], {stdio: 'inherit'});
-}
-
 if (files.length) {
   files.forEach(buildFile);
 } else {
   const packages = getPackages();
-  process.stdout.write(chalk.inverse(' Typechecking \n'));
-  compileTypes(packages);
-  process.stdout.write(`${OK}\n\n`);
   process.stdout.write(chalk.inverse(' Building packages \n'));
   packages.forEach(buildNodePackage);
   process.stdout.write('\n');

scripts/buildTs.js

@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const chalk = require('chalk');
+const execa = require('execa');
+const {getPackages, adjustToTerminalWidth, OK} = require('./buildUtils');
+
+const packages = getPackages();
+
+const packagesWithTs = packages.filter(p =>
+  fs.existsSync(path.resolve(p, 'tsconfig.json'))
+);
+
+const args = ['-b', ...packagesWithTs, ...process.argv.slice(2)];
+
+console.log(chalk.inverse('Building TypeScript definition files'));
+process.stdout.write(adjustToTerminalWidth('Building\n'));
+
+try {
+  execa.sync('tsc', args, {stdio: 'inherit'});
+  process.stdout.write(`${OK}\n`);
+} catch (e) {
+  process.stdout.write('\n');
+  console.error(
+    chalk.inverse.red('Unable to build TypeScript definition files')
+  );
+  console.error(e.stack);
+  process.exitCode = 1;
+}

scripts/buildUtils.js

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const chalk = require('chalk');
+const stringLength = require('string-length');
+
+const PACKAGES_DIR = path.resolve(__dirname, '../packages');
+
+const OK = chalk.reset.inverse.bold.green(' DONE ');
+
+// Get absolute paths of all directories under packages/*
+module.exports.getPackages = function getPackages() {
+  return fs
+    .readdirSync(PACKAGES_DIR)
+    .map(file => path.resolve(PACKAGES_DIR, file))
+    .filter(f => fs.lstatSync(path.resolve(f)).isDirectory());
+};
+
+module.exports.adjustToTerminalWidth = function adjustToTerminalWidth(str) {
+  const columns = process.stdout.columns || 80;
+  const WIDTH = columns - stringLength(OK) + 1;
+  const strs = str.match(new RegExp(`(.{1,${WIDTH}})`, 'g'));
+  let lastString = strs[strs.length - 1];
+  if (lastString.length < WIDTH) {
+    lastString += Array(WIDTH - lastString.length).join(chalk.dim('.'));
+  }
+  return strs
+    .slice(0, -1)
+    .concat(lastString)
+    .join('\n');
+};
+
+module.exports.OK = OK;

scripts/watch.js

@@ -13,7 +13,6 @@ const fs = require('fs');
 const {execSync} = require('child_process');
 const path = require('path');
 const chalk = require('chalk');
-const execa = require('execa');
 const getPackages = require('./getPackages');
 
 const BUILD_CMD = `node ${path.resolve(__dirname, './build.js')}`;
@@ -57,12 +56,6 @@ packages.forEach(p => {
   }
 });
 
-const packageWithTs = packages.filter(p =>
-  fs.existsSync(path.resolve(p, 'tsconfig.json'))
-);
-
-execa('tsc', ['-b', ...packageWithTs, '--watch'], {stdio: 'inherit'});
-
 setInterval(() => {
   const files = Array.from(filesToBuild.keys());
   if (files.length) {