| // This file is a bit weird, so let me explain with some context: we're working |
| // to implement a tool called "Corepack" in Node. This tool will allow us to |
| // provide a Yarn shim to everyone using Node, meaning that they won't need to |
| // run `npm install -g yarn`. |
| // |
| // Still, we don't want to break the experience of people that already use `npm |
| // install -g yarn`! And one annoying thing with npm is that they install their |
| // binaries directly inside the Node bin/ folder. And Because of this, they |
| // refuse to overwrite binaries when they detect they don't belong to npm. Which |
| // means that, since the "yarn" Corepack symlink belongs to Corepack and not npm, |
| // running `npm install -g yarn` would crash by refusing to override the binary :/ |
| // |
| // And thus we have this preinstall script, which checks whether Yarn is being |
| // installed as a global binary, and remove the existing symlink if it detects |
| // it belongs to Corepack. Since preinstall scripts run, in npm, before the global |
| // symlink is created, we bypass this way the ownership check. |
| // |
| // More info: |
| // https://github.com/arcanis/pmm/issues/6 |
| |
| if (process.env.npm_config_global) { |
| var cp = require('child_process'); |
| var fs = require('fs'); |
| var path = require('path'); |
| |
| try { |
| var targetPath = cp.execFileSync(process.execPath, [process.env.npm_execpath, 'bin', '-g'], { |
| encoding: 'utf8', |
| stdio: ['ignore', undefined, 'ignore'], |
| }).replace(/\n/g, ''); |
| |
| var manifest = require('./package.json'); |
| var binNames = typeof manifest.bin === 'string' |
| ? [manifest.name.replace(/^@[^\/]+\//, '')] |
| : typeof manifest.bin === 'object' && manifest.bin !== null |
| ? Object.keys(manifest.bin) |
| : []; |
| |
| binNames.forEach(function (binName) { |
| var binPath = path.join(targetPath, binName); |
| |
| var binTarget; |
| try { |
| binTarget = fs.readlinkSync(binPath); |
| } catch (err) { |
| return; |
| } |
| |
| if (binTarget.startsWith('../lib/node_modules/corepack/')) { |
| try { |
| fs.unlinkSync(binPath); |
| } catch (err) { |
| return; |
| } |
| } |
| }); |
| } catch (err) { |
| // ignore errors |
| } |
| } |