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52 lines
1.2 KiB
52 lines
1.2 KiB
'use strict'; |
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const aliases = ['stdin', 'stdout', 'stderr']; |
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const hasAlias = options => aliases.some(alias => options[alias] !== undefined); |
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const normalizeStdio = options => { |
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if (!options) { |
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return; |
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} |
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const {stdio} = options; |
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if (stdio === undefined) { |
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return aliases.map(alias => options[alias]); |
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} |
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if (hasAlias(options)) { |
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throw new Error(`It's not possible to provide \`stdio\` in combination with one of ${aliases.map(alias => `\`${alias}\``).join(', ')}`); |
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} |
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if (typeof stdio === 'string') { |
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return stdio; |
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} |
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if (!Array.isArray(stdio)) { |
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throw new TypeError(`Expected \`stdio\` to be of type \`string\` or \`Array\`, got \`${typeof stdio}\``); |
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} |
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const length = Math.max(stdio.length, aliases.length); |
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return Array.from({length}, (value, index) => stdio[index]); |
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}; |
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module.exports = normalizeStdio; |
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// `ipc` is pushed unless it is already present |
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module.exports.node = options => { |
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const stdio = normalizeStdio(options); |
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if (stdio === 'ipc') { |
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return 'ipc'; |
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} |
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if (stdio === undefined || typeof stdio === 'string') { |
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return [stdio, stdio, stdio, 'ipc']; |
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} |
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if (stdio.includes('ipc')) { |
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return stdio; |
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} |
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return [...stdio, 'ipc']; |
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};
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