angular-cn/aio/tools/ng-packages-installer/index.js

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'use strict';
const chalk = require('chalk');
const fs = require('fs-extra');
const lockfile = require('@yarnpkg/lockfile');
const path = require('canonical-path');
const semver = require('semver');
const shelljs = require('shelljs');
const yargs = require('yargs');
const PACKAGE_JSON = 'package.json';
const YARN_LOCK = 'yarn.lock';
const LOCAL_MARKER_PATH = 'node_modules/_local_.json';
const PACKAGE_JSON_REGEX = /^[^/]+\/package\.json$/;
const ANGULAR_ROOT_DIR = path.resolve(__dirname, '../../..');
const ANGULAR_DIST_PACKAGES = path.join(ANGULAR_ROOT_DIR, 'dist/packages-dist');
const ANGULAR_DIST_PACKAGES_BUILD_SCRIPT = path.join(ANGULAR_ROOT_DIR, 'scripts/build-packages-dist.js');
const ANGULAR_DIST_PACKAGES_BUILD_CMD = `"${process.execPath}" "${ANGULAR_DIST_PACKAGES_BUILD_SCRIPT}"`;
/**
* A tool that can install Angular dependencies for a project from NPM or from the
* locally built distributables.
*
* This tool is used to change dependencies of the `aio` application and the example
* applications.
*/
class NgPackagesInstaller {
/**
* Create a new installer for a project in the specified directory.
*
* @param {string} projectDir - the path to the directory containing the project.
* @param {object} options - a hash of options for the install:
* * `debug` (`boolean`) - whether to display debug messages.
* * `force` (`boolean`) - whether to force a local installation even if there is a local marker file.
* * `buildPackages` (`boolean`) - whether to build the local Angular packages before using them.
* (NOTE: Building the packages is currently not supported on Windows, so a message is printed instead.)
* * `ignorePackages` (`string[]`) - a collection of names of packages that should not be copied over.
*/
constructor(projectDir, options = {}) {
this.debug = this._parseBooleanArg(options.debug);
this.force = this._parseBooleanArg(options.force);
this.buildPackages = this._parseBooleanArg(options.buildPackages);
this.ignorePackages = options.ignorePackages || [];
this.projectDir = path.resolve(projectDir);
this.localMarkerPath = path.resolve(this.projectDir, LOCAL_MARKER_PATH);
this._log('Project directory:', this.projectDir);
}
// Public methods
/**
* Check whether the dependencies have been overridden with locally built
* Angular packages. This is done by checking for the `_local_.json` marker file.
* This will emit a warning to the console if the dependencies have been overridden.
*/
checkDependencies() {
if (this._checkLocalMarker()) {
this._printWarning();
}
}
/**
* Install locally built Angular dependencies, overriding the dependencies in the package.json
* This will also write a "marker" file (`_local_.json`), which contains the overridden package.json
* contents and acts as an indicator that dependencies have been overridden.
*/
installLocalDependencies() {
if (this.force || !this._checkLocalMarker()) {
const pathToPackageConfig = path.resolve(this.projectDir, PACKAGE_JSON);
const pathToLockfile = path.resolve(this.projectDir, YARN_LOCK);
const parsedLockfile = this._parseLockfile(pathToLockfile);
const packages = this._getDistPackages();
try {
// Overwrite local Angular packages dependencies to other Angular packages with local files.
Object.keys(packages).forEach(key => {
const pkg = packages[key];
const tmpConfig = JSON.parse(JSON.stringify(pkg.config));
// Prevent accidental publishing of the package, if something goes wrong.
tmpConfig.private = true;
// Overwrite project dependencies/devDependencies to Angular packages with local files.
['dependencies', 'devDependencies'].forEach(prop => {
const deps = tmpConfig[prop] || {};
Object.keys(deps).forEach(key2 => {
const pkg2 = packages[key2];
if (pkg2) {
// point the core Angular packages at the distributable folder
deps[key2] = `file:${pkg2.parentDir}/${key2.replace('@angular/', '')}`;
this._log(`Overriding dependency of local ${key} with local package: ${key2}: ${deps[key2]}`);
}
});
});
fs.writeFileSync(pkg.packageJsonPath, JSON.stringify(tmpConfig, null, 2));
});
const packageConfigFile = fs.readFileSync(pathToPackageConfig, 'utf8');
const packageConfig = JSON.parse(packageConfigFile);
const [dependencies, peers] = this._collectDependencies(packageConfig.dependencies || {}, packages);
const [devDependencies, devPeers] = this._collectDependencies(packageConfig.devDependencies || {}, packages);
this._assignPeerDependencies(peers, dependencies, devDependencies, parsedLockfile);
this._assignPeerDependencies(devPeers, dependencies, devDependencies, parsedLockfile);
const localPackageConfig = Object.assign(Object.create(null), packageConfig, { dependencies, devDependencies });
localPackageConfig.__angular = { local: true };
const localPackageConfigJson = JSON.stringify(localPackageConfig, null, 2);
try {
this._log(`Writing temporary local ${PACKAGE_JSON} to ${pathToPackageConfig}`);
fs.writeFileSync(pathToPackageConfig, localPackageConfigJson);
this._installDeps('--pure-lockfile', '--check-files');
this._setLocalMarker(localPackageConfigJson);
} finally {
this._log(`Restoring original ${PACKAGE_JSON} to ${pathToPackageConfig}`);
fs.writeFileSync(pathToPackageConfig, packageConfigFile);
}
} finally {
// Restore local Angular packages dependencies to other Angular packages.
this._log(`Restoring original ${PACKAGE_JSON} for local Angular packages.`);
Object.keys(packages).forEach(key => {
const pkg = packages[key];
fs.writeFileSync(pkg.packageJsonPath, JSON.stringify(pkg.config, null, 2));
});
}
}
}
/**
* Reinstall the original package.json depdendencies
* Yarn will also delete the local marker file for us.
*/
restoreNpmDependencies() {
this._installDeps('--frozen-lockfile', '--check-files');
}
// Protected helpers
_assignPeerDependencies(peerDependencies, dependencies, devDependencies, parsedLockfile) {
Object.keys(peerDependencies).forEach(key => {
const peerDepRange = peerDependencies[key];
// Ignore peerDependencies whose range is already satisfied by current version in lockfile.
const originalRange = dependencies[key] || devDependencies[key];
const lockfileVersion = originalRange && parsedLockfile[`${key}@${originalRange}`].version;
if (lockfileVersion && semver.satisfies(lockfileVersion, peerDepRange)) return;
// If there is already an equivalent dependency then override it - otherwise assign/override the devDependency
if (dependencies[key]) {
this._log(`Overriding dependency with peerDependency: ${key}: ${peerDepRange}`);
dependencies[key] = peerDepRange;
} else {
this._log(`${devDependencies[key] ? 'Overriding' : 'Assigning'} devDependency with peerDependency: ${key}: ${peerDepRange}`);
devDependencies[key] = peerDepRange;
}
});
}
/**
* Build the local Angular packages.
*
* NOTE:
* Building the packages is currently not supported on Windows, so a message is printed instead, prompting the user to
* do it themselves (e.g. using Windows Subsystem for Linux or a docker container).
*/
_buildDistPackages() {
const canBuild = process.platform !== 'win32';
if (canBuild) {
this._log(`Building the Angular packages with: ${ANGULAR_DIST_PACKAGES_BUILD_SCRIPT}`);
shelljs.exec(ANGULAR_DIST_PACKAGES_BUILD_CMD);
} else {
this._warn([
'Automatically building the local Angular packages is currently not supported on Windows.',
`Please, ensure '${ANGULAR_DIST_PACKAGES}' exists and is up-to-date (e.g. by running ` +
`'${ANGULAR_DIST_PACKAGES_BUILD_SCRIPT}' in Git Bash for Windows, Windows Subsystem for Linux or a Linux ` +
'docker container or VM).',
'',
'Proceeding anyway...',
].join('\n'));
}
}
_collectDependencies(dependencies, packages) {
const peerDependencies = Object.create(null);
const mergedDependencies = Object.assign(Object.create(null), dependencies);
Object.keys(dependencies).forEach(key => {
const sourcePackage = packages[key];
if (sourcePackage) {
// point the core Angular packages at the distributable folder
mergedDependencies[key] = `file:${sourcePackage.parentDir}/${key.replace('@angular/', '')}`;
this._log(`Overriding dependency with local package: ${key}: ${mergedDependencies[key]}`);
// grab peer dependencies
const sourcePackagePeerDeps = sourcePackage.config.peerDependencies || {};
Object.keys(sourcePackagePeerDeps)
// ignore peerDependencies which are already core Angular packages
.filter(key => !packages[key])
.forEach(key => peerDependencies[key] = sourcePackagePeerDeps[key]);
}
});
return [mergedDependencies, peerDependencies];
}
/**
* A hash of Angular package configs.
* (Detected as directories in '/dist/packages-dist/' that contain a top-level 'package.json' file.)
*/
_getDistPackages() {
const packageConfigs = Object.create(null);
const distDir = ANGULAR_DIST_PACKAGES;
this._log(`Angular distributable directory: ${distDir}.`);
if (this.buildPackages) {
this._buildDistPackages();
}
shelljs
.find(distDir)
.map(filePath => filePath.slice(distDir.length + 1))
.filter(filePath => PACKAGE_JSON_REGEX.test(filePath))
.forEach(packagePath => {
const packageName = `@angular/${packagePath.slice(0, -PACKAGE_JSON.length -1)}`;
if (this.ignorePackages.indexOf(packageName) === -1) {
const packageConfig = require(path.resolve(distDir, packagePath));
packageConfigs[packageName] = {
parentDir: distDir,
packageJsonPath: path.resolve(distDir, packagePath),
config: packageConfig
};
} else {
this._log('Ignoring package', packageName);
}
});
this._log('Found the following Angular distributables:', Object.keys(packageConfigs).map(key => `\n - ${key}`));
return packageConfigs;
}
_installDeps(...options) {
const command = 'yarn install ' + options.join(' ');
this._log('Installing dependencies with:', command);
shelljs.exec(command, {cwd: this.projectDir});
}
/**
* Log a message if the `debug` property is set to true.
* @param {...string[]} messages - The messages to be logged.
*/
_log(...messages) {
if (this.debug) {
const header = ` [${NgPackagesInstaller.name}]: `;
const indent = ' '.repeat(header.length);
const message = messages.join(' ');
console.info(`${header}${message.split('\n').join(`\n${indent}`)}`);
}
}
/**
* Extract the value for a boolean cli argument/option. When passing an option multiple times, `yargs` parses it as an
* array of boolean values. In that case, we only care about the last occurrence.
*
* This can be useful, for example, when one has a base command with the option turned on and another command
* (building on top of the first one) turning the option off:
* ```
* "base-command": "my-script --foo --bar",
* "no-bar-command": "yarn base-command --no-bar",
* ```
*/
_parseBooleanArg(value) {
return Array.isArray(value) ? value.pop() : value;
}
/**
* Parse and return a `yarn.lock` file.
*/
_parseLockfile(lockfilePath) {
const lockfileContent = fs.readFileSync(lockfilePath, 'utf8');
const parsed = lockfile.parse(lockfileContent);
if (parsed.type !== 'success') {
throw new Error(`[${NgPackagesInstaller.name}]: Error parsing lockfile '${lockfilePath}' (result type: ${parsed.type}).`);
}
return parsed.object;
}
_printWarning() {
const relativeScriptPath = path.relative('.', __filename.replace(/\.js$/, ''));
const absoluteProjectDir = path.resolve(this.projectDir);
const restoreCmd = `node ${relativeScriptPath} restore ${absoluteProjectDir}`;
// Log a warning.
this._warn([
`The project at "${absoluteProjectDir}" is running against the local Angular build.`,
'',
'To restore the npm packages run:',
'',
` "${restoreCmd}"`,
].join('\n'));
}
/**
* Log a warning message do draw user's attention.
* @param {...string[]} messages - The messages to be logged.
*/
_warn(...messages) {
const lines = messages.join(' ').split('\n');
console.warn(chalk.yellow([
'',
'!'.repeat(110),
'!!!',
'!!! WARNING',
'!!!',
...lines.map(line => `!!! ${line}`),
'!!!',
'!'.repeat(110),
'',
].join('\n')));
}
// Local marker helpers
_checkLocalMarker() {
this._log('Checking for local marker at', this.localMarkerPath);
return fs.existsSync(this.localMarkerPath);
}
_setLocalMarker(contents) {
this._log('Writing local marker file to', this.localMarkerPath);
fs.writeFileSync(this.localMarkerPath, contents);
}
}
function main() {
shelljs.set('-e');
const createInstaller = argv => {
const {projectDir, ...options} = argv;
return new NgPackagesInstaller(projectDir, options);
};
yargs
.usage('$0 <cmd> [args]')
.option('debug', { describe: 'Print additional debug information.', default: false })
.option('force', { describe: 'Force the command to execute even if not needed.', default: false })
.option('build-packages', { describe: 'Build the local Angular packages, before using them.', default: false })
.option('ignore-packages', { describe: 'List of Angular packages that should not be used in local mode.', default: [], array: true })
.command('overwrite <projectDir> [--force] [--debug] [--ignore-packages package1 package2]', 'Install dependencies from the locally built Angular distributables.', () => {}, argv => {
createInstaller(argv).installLocalDependencies();
})
.command('restore <projectDir> [--debug]', 'Install dependencies from the npm registry.', () => {}, argv => {
createInstaller(argv).restoreNpmDependencies();
})
.command('check <projectDir> [--debug]', 'Check that dependencies came from npm. Otherwise display a warning message.', () => {}, argv => {
createInstaller(argv).checkDependencies();
})
.demandCommand(1, 'Please supply a command from the list above.')
.strict()
.wrap(yargs.terminalWidth())
.argv;
}
module.exports = NgPackagesInstaller;
if (require.main === module) {
main();
}