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chore: fix installing from GitHub URL (#5669)

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The change to the install script to require TypeScript works fine when
installing from npm (because on npm the `lib` directory with the
compiled code already exists) but doesn't if you install from a GitHub
URL. By default it seems npm uses the `files` list when you install from
GitHub which means it's missing a bunch of files that we need to
compile.

Additionally by default when installing from a GitHub URL npm doesn't
install the dependencies which is an issue for us when we need to
compile TypeScript.

The fix is to create a `prepare` script that runs TypeScript if
required. From the npm docs [1]:

> `prepare`: Run both BEFORE the package is packed and published, on
> local npm install without any arguments, and when installing git
> dependencies

And from the npm docs on install [2], it confirms that if a package has
a `prepare` script it is run when installing from GitHub:

> As with regular git dependencies, dependencies and devDependencies
> will be installed if the package has a prepare script, before the
> package is done installing.

Despite having the `prepare` script we still need the TypeScript check
in `install.js` to satisfy the 3rd scenario below where we need to force
a compile:

* If I'm a user installing `puppeteer@X` from npm, the module is
published with the `lib/` directory of compiled code, so I'm set.
* If I'm a user installing Puppeteer from GitHub, the `prepare` script
will run TypeScript for me so I'm set.
* If I'm a developer working on Puppeteer, the `prepare` script also
runs but _after_ `npm install` which means `install.js` fails as it
requires `./lib/helper.js`. So in `install.js` we call
`compileTypeScriptIfRequired` to catch this case.

[1]: https://docs.npmjs.com/misc/scripts
[2]: https://docs.npmjs.com/cli/install

Co-authored-by: Mathias Bynens <mathias@qiwi.be>

Fixes #5660.
This commit is contained in:
Jack Franklin 2020-04-17 10:29:40 +01:00 committed by GitHub
parent 46ef9f79ca
commit 20c22ad9ad
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 64 additions and 40 deletions
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44
install.js
View File

@ -14,45 +14,6 @@
* limitations under the License.
*/
const fs = require('fs');
const path = require('path');
const child_process = require('child_process');
const {promisify} = require('util');
const fsAccess = promisify(fs.access);
const exec = promisify(child_process.exec);
const fileExists = async filePath => fsAccess(filePath).then(() => true).catch(() => false);
/*
* Now Puppeteer is built with TypeScript, we need to ensure that
* locally we have the generated output before trying to install.
*
* For users installing puppeteer this is fine, they will have the
* generated lib/ directory as we ship it when we publish to npm.
*
* However, if you're cloning the repo to contribute, you won't have the
* generated lib/ directory so this script checks if we need to run
* TypeScript first to ensure the output exists and is in the right
* place.
*/
async function compileTypeScript() {
return exec('npm run tsc').catch(err => {
console.error('Error running TypeScript', err);
process.exit(1);
});
}
async function ensureLibDirectoryExists() {
const libPath = path.join(__dirname, 'lib');
const libExists = await fileExists(libPath);
if (libExists) return;
logPolitely('Compiling TypeScript before install...');
await compileTypeScript();
}
/**
* This file is part of public API.
*
@ -62,13 +23,16 @@ async function ensureLibDirectoryExists() {
* still possible to install a supported browser using this script when
* necessary.
*/
const compileTypeScriptIfRequired = require('./typescript-if-required');
const supportedProducts = {
'chrome': 'Chromium',
'firefox': 'Firefox Nightly'
};
async function download() {
await ensureLibDirectoryExists();
await compileTypeScriptIfRequired();
const downloadHost = process.env.PUPPETEER_DOWNLOAD_HOST || process.env.npm_config_puppeteer_download_host || process.env.npm_package_config_puppeteer_download_host;
const puppeteer = require('./index');

1
package.json
View File

@ -18,6 +18,7 @@
"debug-unit": "node --inspect-brk test/test.js",
"test-doclint": "mocha --config mocha-config/doclint-tests.js",
"test": "npm run tsc && npm run lint --silent && npm run coverage && npm run test-doclint && npm run test-types",
"prepare": "node typescript-if-required.js",
"prepublishOnly": "npm run tsc",
"dev-install": "npm run tsc && node install.js",
"install": "node install.js",

59
typescript-if-required.js Normal file
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@ -0,0 +1,59 @@
/**
* Copyright 2020 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const child_process = require('child_process');
const path = require('path');
const fs = require('fs');
const {promisify} = require('util');
const exec = promisify(child_process.exec);
const fsAccess = promisify(fs.access);
const fileExists = async filePath => fsAccess(filePath).then(() => true).catch(() => false);
/*
* Now Puppeteer is built with TypeScript, we need to ensure that
* locally we have the generated output before trying to install.
*
* For users installing puppeteer this is fine, they will have the
* generated lib/ directory as we ship it when we publish to npm.
*
* However, if you're cloning the repo to contribute, you won't have the
* generated lib/ directory so this script checks if we need to run
* TypeScript first to ensure the output exists and is in the right
* place.
*/
async function compileTypeScript() {
return exec('npm run tsc').catch(err => {
console.error('Error running TypeScript', err);
process.exit(1);
});
}
async function compileTypeScriptIfRequired() {
const libPath = path.join(__dirname, 'lib');
const libExists = await fileExists(libPath);
if (libExists) return;
console.log('Puppeteer:', 'Compiling TypeScript...');
await compileTypeScript();
}
// It's being run as node typescript-if-required.js, not require('..')
if (require.main === module)
compileTypeScriptIfRequired();
module.exports = compileTypeScriptIfRequired;