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#!/usr/bin/env node
/* Based on webpack/bin/webpack.js */
/* eslint-disable no-console */
"use strict";
/**
* @param {string} command process to run
* @param {string[]} args command line arguments
* @returns {Promise<void>} promise
*/
const runCommand = (command, args) => {
const cp = require("child_process");
return new Promise((resolve, reject) => {
const executedCommand = cp.spawn(command, args, {
stdio: "inherit",
shell: true,
});
executedCommand.on("error", (error) => {
reject(error);
});
executedCommand.on("exit", (code) => {
if (code === 0) {
resolve();
} else {
reject();
}
});
});
};
/**
* @param {string} packageName name of the package
* @returns {boolean} is the package installed?
*/
const isInstalled = (packageName) => {
if (process.versions.pnp) {
return true;
}
const path = require("path");
const fs = require("graceful-fs");
let dir = __dirname;
do {
try {
if (
fs.statSync(path.join(dir, "node_modules", packageName)).isDirectory()
) {
return true;
}
} catch (_error) {
// Nothing
}
// eslint-disable-next-line no-cond-assign
} while (dir !== (dir = path.dirname(dir)));
// https://github.com/nodejs/node/blob/v18.9.1/lib/internal/modules/cjs/loader.js#L1274
// @ts-ignore
for (const internalPath of require("module").globalPaths) {
try {
if (fs.statSync(path.join(internalPath, packageName)).isDirectory()) {
return true;
}
} catch (_error) {
// Nothing
}
}
return false;
};
/**
* @param {CliOption} cli options
* @returns {void}
*/
const runCli = (cli) => {
if (cli.preprocess) {
cli.preprocess();
}
const path = require("path");
const pkgPath = require.resolve(`${cli.package}/package.json`);
// eslint-disable-next-line import/no-dynamic-require
const pkg = require(pkgPath);
if (pkg.type === "module" || /\.mjs/i.test(pkg.bin[cli.binName])) {
import(path.resolve(path.dirname(pkgPath), pkg.bin[cli.binName])).catch(
(error) => {
console.error(error);
process.exitCode = 1;
}
);
} else {
// eslint-disable-next-line import/no-dynamic-require
require(path.resolve(path.dirname(pkgPath), pkg.bin[cli.binName]));
}
};
/**
* @typedef {Object} CliOption
* @property {string} name display name
* @property {string} package npm package name
* @property {string} binName name of the executable file
* @property {boolean} installed currently installed?
* @property {string} url homepage
* @property {function} preprocess preprocessor
*/
/** @type {CliOption} */
const cli = {
name: "webpack-cli",
package: "webpack-cli",
binName: "webpack-cli",
installed: isInstalled("webpack-cli"),
url: "https://github.com/webpack/webpack-cli",
preprocess() {
process.argv.splice(2, 0, "serve");
},
};
if (!cli.installed) {
const path = require("path");
const fs = require("graceful-fs");
const readLine = require("readline");
const notify = `CLI for webpack must be installed.\n ${cli.name} (${cli.url})\n`;
console.error(notify);
/**
* @type {string}
*/
let packageManager;
if (fs.existsSync(path.resolve(process.cwd(), "yarn.lock"))) {
packageManager = "yarn";
} else if (fs.existsSync(path.resolve(process.cwd(), "pnpm-lock.yaml"))) {
packageManager = "pnpm";
} else {
packageManager = "npm";
}
const installOptions = [packageManager === "yarn" ? "add" : "install", "-D"];
console.error(
`We will use "${packageManager}" to install the CLI via "${packageManager} ${installOptions.join(
" "
)} ${cli.package}".`
);
const question = `Do you want to install 'webpack-cli' (yes/no): `;
const questionInterface = readLine.createInterface({
input: process.stdin,
output: process.stderr,
});
// In certain scenarios (e.g. when STDIN is not in terminal mode), the callback function will not be
// executed. Setting the exit code here to ensure the script exits correctly in those cases. The callback
// function is responsible for clearing the exit code if the user wishes to install webpack-cli.
process.exitCode = 1;
questionInterface.question(question, (answer) => {
questionInterface.close();
const normalizedAnswer = answer.toLowerCase().startsWith("y");
if (!normalizedAnswer) {
console.error(
"You need to install 'webpack-cli' to use webpack via CLI.\n" +
"You can also install the CLI manually."
);
return;
}
process.exitCode = 0;
console.log(
`Installing '${
cli.package
}' (running '${packageManager} ${installOptions.join(" ")} ${
cli.package
}')...`
);
runCommand(packageManager, installOptions.concat(cli.package))
.then(() => {
runCli(cli);
})
.catch((error) => {
console.error(error);
process.exitCode = 1;
});
});
} else {
runCli(cli);
}