64 lines
1.8 KiB
JavaScript
64 lines
1.8 KiB
JavaScript
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/*
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* Project: tiny-version-compare https://github.com/bfred-it/tiny-version-compare
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* License (MIT) https://github.com/bfred-it/tiny-version-compare/blob/master/LICENSE
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*/
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const split = v => String(v).replace(/^[vr]/, '') // Drop initial 'v' or 'r'
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.replace(/([a-z]+)/gi, '.$1.') // Sort each word separately
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.replace(/[-.]+/g, '.') // Consider dashes as separators (+ trim multiple separators)
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.split('.');
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// Development versions are considered "negative",
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// but localeCompare doesn't handle negative numbers.
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// This offset is applied to reset the lowest development version to 0
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const offset = (part) => {
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// Not numeric, return as is
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if (Number.isNaN(part)) {
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return part;
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}
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return 5 + Number(part);
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};
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const parsePart = (part) => {
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// Missing, consider it zero
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if (typeof part === 'undefined') {
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return 0;
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}
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// Sort development versions
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switch (part.toLowerCase()) {
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case 'dev':
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return -5;
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case 'alpha':
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return -4;
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case 'beta':
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return -3;
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case 'rc':
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return -2;
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case 'pre':
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return -1;
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default:
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}
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// Return as is, it’s either a plain number or text that will be sorted alphabetically
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return part;
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};
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const versionCompare = (prev, next) => {
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const a = split(prev);
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const b = split(next);
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for (let i = 0; i < a.length || i < b.length; i += 1) {
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const ai = offset(parsePart(a[i]));
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const bi = offset(parsePart(b[i]));
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const sort = String(ai).localeCompare(bi, 'en', {
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numeric: true,
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});
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// Once the difference is found,
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// stop comparing the rest of the parts
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if (sort !== 0) {
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return sort;
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}
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}
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// No difference found
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return 0;
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};
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export default versionCompare;
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