| 'use strict'; |
| // The Node team wants to deprecate `process.bind(...)`. |
| // https://github.com/nodejs/node/pull/2768 |
| // |
| // However, we need the 'uv' binding for errname support. |
| // This is a defensive wrapper around it so `execa` will not fail entirely if it stops working someday. |
| // |
| // If this ever stops working. See: https://github.com/sindresorhus/execa/issues/31#issuecomment-215939939 for another possible solution. |
| let uv; |
| |
| try { |
| uv = process.binding('uv'); |
| |
| if (typeof uv.errname !== 'function') { |
| throw new TypeError('uv.errname is not a function'); |
| } |
| } catch (err) { |
| console.error('execa/lib/errname: unable to establish process.binding(\'uv\')', err); |
| uv = null; |
| } |
| |
| function errname(uv, code) { |
| if (uv) { |
| return uv.errname(code); |
| } |
| |
| if (!(code < 0)) { |
| throw new Error('err >= 0'); |
| } |
| |
| return `Unknown system error ${code}`; |
| } |
| |
| module.exports = code => errname(uv, code); |
| |
| // Used for testing the fallback behavior |
| module.exports.__test__ = errname; |