| 1 | module.exports = flags => {
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| 2 | const lines = Object.entries(flags).map(entry => {
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| 3 | const name = entry[0];
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| 4 | const value = entry[1];
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| 5 | return [
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| 6 | [name, value.alias].filter(Boolean),
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| 7 | value.description,
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| 8 | value.default
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| 9 | ].filter(Boolean);
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| 10 | });
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| 11 |
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| 12 | const longest = lines
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| 13 | .map(line => {
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| 14 | const flags = line[0];
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| 15 | return flags.reduce((sum, flag) => sum + flag.length, 0);
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| 16 | })
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| 17 | .sort((a, b) => b - a)[0];
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| 18 |
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| 19 | return lines
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| 20 | .map(line => {
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| 21 | const flags = line[0];
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| 22 | const desc = line[1];
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| 23 | const defaults = line[2];
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| 24 | const fs = flags.map(flag =>
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| 25 | flag.length > 1 ? `--${flag}` : ` -${flag}`
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| 26 | );
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| 27 | const ds = defaults ? `, defaults to: ${defaults}` : '';
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| 28 | const length = flags.reduce((sum, flag) => sum + flag.length, 0);
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| 29 | return `${fs.join(',')}${' '.repeat(
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| 30 | Math.max(4 + longest - length, 0)
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| 31 | )}${desc}${ds}`;
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| 32 | })
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| 33 | .join('\n');
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| 34 | };
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