33 lines
1.0 KiB
TypeScript
33 lines
1.0 KiB
TypeScript
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/** Node package patterns contain one star matching at least one character. */
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export const packageSubpathPatternMatches = (
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pattern: string,
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subpath: string,
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): boolean => {
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const wildcard = pattern.indexOf("*");
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return (
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wildcard !== -1 &&
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pattern.lastIndexOf("*") === wildcard &&
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subpath.length >= pattern.length &&
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subpath.startsWith(pattern.slice(0, wildcard)) &&
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subpath.endsWith(pattern.slice(wildcard + 1))
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);
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};
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/** Node chooses the longest prefix, then the longest complete pattern key. */
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export const selectPackageSubpathPattern = (
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patterns: readonly string[],
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subpath: string,
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): string | undefined => {
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let selected: string | undefined;
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for (const pattern of patterns) {
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if (!packageSubpathPatternMatches(pattern, subpath)) continue;
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if (
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selected === undefined ||
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pattern.indexOf("*") > selected.indexOf("*") ||
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(pattern.indexOf("*") === selected.indexOf("*") &&
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pattern.length > selected.length)
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)
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selected = pattern;
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}
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return selected;
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};
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