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force-lowest-dependencies.js
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force-lowest-dependencies.js
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/*
* This file is part of the Symfony Webpack Encore package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
'use strict';
const fs = require('fs');
const childProcess = require('child_process');
function getLowestVersion(dependency, range) {
return new Promise((resolve, reject) => {
childProcess.exec(
`npm view "${dependency}@${range}" version`,
{ encoding: 'utf-8' },
(error, stdout) => {
if (error) {
reject(`Could not retrieve versions list for "${dependency}@${range}"`);
}
const versions = stdout
.split('\n')
.filter(line => line);
if (versions.length === 0) {
reject(`Could not find a lowest version for "${dependency}@${range}"`);
}
const parts = versions[0].split(' ');
// If there is only one version available that version
// is directly printed as the output of npm view.
if (parts.length === 1) {
resolve([dependency, parts[0]]);
}
// If multiple versions are available then it outputs
// multiple lines matching the following format:
// <package>@<version> '<version>'
if (parts.length === 2) {
resolve([dependency, parts[1].replace(/'/g, '')]);
}
reject(`Unexpected response for "${dependency}@${range}": ${versions[0]}`);
}
);
});
}
fs.readFile('package.json', (error, data) => {
if (error) {
throw error;
}
const packageInfo = JSON.parse(data);
const dependencyPromises = [];
if (packageInfo.dependencies) {
for (const dependency in packageInfo.dependencies) {
dependencyPromises.push(getLowestVersion(
dependency,
packageInfo.dependencies[dependency]
));
}
}
const devDependencyPromises = [];
if (packageInfo.devDependencies) {
for (const devDependency in packageInfo.devDependencies) {
devDependencyPromises.push(getLowestVersion(
devDependency,
packageInfo.devDependencies[devDependency]
));
}
}
const dependenciesUpdate = Promise.all(dependencyPromises).then(versions => {
versions.forEach(version => {
packageInfo.dependencies[version[0]] = version[1];
});
});
const devDependenciesUpdate = Promise.all(devDependencyPromises).then(versions => {
versions.forEach(version => {
packageInfo.devDependencies[version[0]] = version[1];
});
});
// Once all the lowest versions have been resolved, update the
// package.json file accordingly.
Promise
.all([dependenciesUpdate, devDependenciesUpdate])
.then(() => new Promise((resolve, reject) => {
fs.writeFile('package.json', JSON.stringify(packageInfo, null, 2), (error) => {
if (error) {
reject(error);
}
resolve();
});
}))
.then(() => {
console.log('Updated package.json file with lowest dependency versions: ');
console.log('Dependencies:');
for (const dependency in packageInfo.dependencies) {
console.log(` - ${dependency}: ${packageInfo.dependencies[dependency]}`);
}
console.log('Dev dependencies:');
for (const dependency in packageInfo.devDependencies) {
console.log(` - ${dependency}: ${packageInfo.devDependencies[dependency]}`);
}
})
.catch(error => {
console.error(error);
process.exit(1); // eslint-disable-line
});
});