syncpack/dist/version-group/lib/get-preferred-version.js

Consistent dependency versions in large JavaScript Monorepos

import { Effect, pipe } from 'effect';
import gt from 'semver/functions/gt.js';
import lt from 'semver/functions/lt.js';
import { clean } from './clean.js';
import { getRangeScore } from './get-range-score.js';
export function getPreferredVersion(preferVersion, specifiers) {
    return pipe(
    // every instance must have a semver version
    Effect.all(specifiers.map(specifier => pipe(specifier.getSemver(), Effect.map(semver => ({ semver, specifier }))))), 
    // comparing semver can error on some loose ranges, all must succeed
    Effect.map(semvers => semvers.sort((a, b) => compareSemver(a.semver, b.semver))), 
    // get the preferred value from the list
    Effect.map(sorted => sorted[preferVersion === 'lowestSemver' ? 0 : sorted.length - 1]), 
    // return just the specifier
    Effect.map(preferred => preferred?.specifier));
}
const EQ = 0;
const LT = -1;
const GT = 1;
function compareSemver(a, b) {
    if (a.startsWith('workspace:')) {
        return LT;
    }
    if (b.startsWith('workspace:')) {
        return GT;
    }
    if (a === b) {
        return EQ;
    }
    if (a === '*') {
        return GT;
    }
    if (b === '*') {
        return LT;
    }
    const cleanA = clean(a);
    const cleanB = clean(b);
    if (gt(cleanA, cleanB)) {
        return GT;
    }
    if (lt(cleanA, cleanB)) {
        return LT;
    }
    const scoreA = getRangeScore(a);
    const scoreB = getRangeScore(b);
    if (scoreA < scoreB) {
        return LT;
    }
    if (scoreA > scoreB) {
        return GT;
    }
    return EQ;
}