codekingpro/portable-devtools

1// This file is a bit weird, so let me explain with some context: we're working2// to implement a tool called "Corepack" in Node. This tool will allow us to3// provide a Yarn shim to everyone using Node, meaning that they won't need to4// run `npm install -g yarn`.5//6// Still, we don't want to break the experience of people that already use `npm7// install -g yarn`! And one annoying thing with npm is that they install their8// binaries directly inside the Node bin/ folder. And Because of this, they9// refuse to overwrite binaries when they detect they don't belong to npm. Which10// means that, since the "yarn" Corepack symlink belongs to Corepack and not npm,11// running `npm install -g yarn` would crash by refusing to override the binary :/12//13// And thus we have this preinstall script, which checks whether Yarn is being14// installed as a global binary, and remove the existing symlink if it detects15// it belongs to Corepack. Since preinstall scripts run, in npm, before the global16// symlink is created, we bypass this way the ownership check.17//18// More info:19// https://github.com/arcanis/pmm/issues/620 21if (process.env.npm_config_global) {22    var cp = require('child_process');23    var fs = require('fs');24    var path = require('path');25 26    try {27        var targetPath = cp.execFileSync(process.execPath, [process.env.npm_execpath, 'bin', '-g'], {28            encoding: 'utf8',29            stdio: ['ignore', undefined, 'ignore'],30        }).replace(/\n/g, '');31 32        var manifest = require('./package.json');33        var binNames = typeof manifest.bin === 'string'34            ? [manifest.name.replace(/^@[^\/]+\//, '')]35            : typeof manifest.bin === 'object' && manifest.bin !== null36            ? Object.keys(manifest.bin)37            : [];38 39        binNames.forEach(function (binName) {40            var binPath = path.join(targetPath, binName);41 42            var binTarget;43            try {44                binTarget = fs.readlinkSync(binPath);45            } catch (err) {46                return;47            }48 49            if (binTarget.startsWith('../lib/node_modules/corepack/')) {50                try {51                    fs.unlinkSync(binPath);52                } catch (err) {53                    return;54                }55            }56        });57    } catch (err) {58        // ignore errors59    }60}61