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const fs = require("fs");
const path = require("path");
const { sync } = require("execa");
const utils = require("./index");
/**
*
* Returns the name of package manager to use,
* preference order - npm > yarn > pnpm
*
* @returns {String} - The package manager name
*/
function getPackageManager() {
const hasLocalNpm = fs.existsSync(path.resolve(process.cwd(), "package-lock.json"));
if (hasLocalNpm) {
return "npm";
}
const hasLocalYarn = fs.existsSync(path.resolve(process.cwd(), "yarn.lock"));
if (hasLocalYarn) {
return "yarn";
}
const hasLocalPnpm = fs.existsSync(path.resolve(process.cwd(), "pnpm-lock.yaml"));
if (hasLocalPnpm) {
return "pnpm";
}
try {
// the sync function below will fail if npm is not installed,
// an error will be thrown
if (sync("npm", ["--version"])) {
return "npm";
}
} catch (e) {
// Nothing
}
try {
// the sync function below will fail if yarn is not installed,
// an error will be thrown
if (sync("yarn", ["--version"])) {
return "yarn";
}
} catch (e) {
// Nothing
}
try {
// the sync function below will fail if pnpm is not installed,
// an error will be thrown
if (sync("pnpm", ["--version"])) {
return "pnpm";
}
} catch (e) {
utils.logger.error("No package manager found.");
process.exit(2);
}
}
module.exports = getPackageManager;