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