132 lines
4.2 KiB
JavaScript
132 lines
4.2 KiB
JavaScript
var nodeSemver = require('semver');
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var sver = require('./sver');
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var Semver = sver.Semver;
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var SemverRange = sver.SemverRange;
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var forOf = require('es6-iterator/for-of');
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module.exports = function nodeRangeToSemverRange (range) {
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var parsed = nodeSemver.validRange(range);
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// tag version
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if (!parsed)
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return new SemverRange(range);
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if (parsed === '*')
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return new SemverRange(parsed);
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try {
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var semverRange = new SemverRange(range);
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if (!semverRange.version.tag)
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return semverRange;
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}
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catch (e) {
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if (e.code !== 'ENOTSEMVER')
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throw e;
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}
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var outRange;
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forOf(parsed.split('||'), function(union) {
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// compute the intersection into a lowest upper bound and a highest lower bound
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var upperBound, lowerBound, upperEq, lowerEq;
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forOf(union.split(' '), function(intersection, doBreak) {
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var lt = intersection[0] === '<';
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var gt = intersection[0] === '>';
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if (!lt && !gt) {
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upperBound = intersection;
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upperEq = true;
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return doBreak();
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}
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var eq = intersection[1] === '=';
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if (!gt) {
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var version = new Semver(intersection.substr(1 + eq));
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if (!upperBound || upperBound.gt(version)) {
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upperBound = version;
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upperEq = eq;
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}
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}
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else if (!lt) {
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var eq = intersection[1] === '=';
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var version = new Semver(intersection.substr(1 + eq));
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if (!lowerBound || lowerBound.lt(version)) {
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lowerBound = version;
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lowerEq = eq;
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}
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}
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});
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// if the lower bound is greater than the upper bound then just return the lower bound exactly
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if (lowerBound && upperBound && lowerBound.gt(upperBound)) {
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var curRange = new SemverRange(lowerBound.toString());
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// the largest or highest union range wins
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if (!outRange || !outRange.contains(curRange) && (curRange.gt(outRange) || curRange.contains(outRange)))
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outRange = curRange;
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return;
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}
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// determine the largest semver range satisfying the upper bound
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var upperRange;
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if (upperBound) {
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// if the upper bound has an equality then we return it directly
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if (upperEq) {
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var curRange = new SemverRange(upperBound.toString());
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// the largest or highest union range wins
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if (!outRange || !outRange.contains(curRange) && (curRange.gt(outRange) || curRange.contains(outRange)))
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outRange = curRange;
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return;
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}
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// prerelease ignored in upper bound
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var major = 0, minor = 0, patch = 0, rangeType = '';
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// <2.0.0 -> ^1.0.0
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if (upperBound.patch === 0) {
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if (upperBound.minor === 0) {
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if (upperBound.major > 0) {
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major = upperBound.major - 1;
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rangeType = '^';
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}
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}
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// <1.2.0 -> ~1.1.0
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else {
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major = upperBound.major;
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minor = upperBound.minor - 1;
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rangeType = '~';
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}
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}
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// <1.2.3 -> ~1.2.0
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else {
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major = upperBound.major;
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minor = upperBound.minor;
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patch = 0;
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rangeType = '~';
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}
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if (major === 0 && rangeType === '^')
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upperRange = new SemverRange('0');
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else
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upperRange = new SemverRange(rangeType + major + '.' + minor + '.' + patch);
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}
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// determine the lower range semver range
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var lowerRange;
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if (!lowerEq) {
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if (lowerBound.pre)
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lowerRange = new SemverRange('^' + lowerBound.major + '.' + lowerBound.minor + '.' + lowerBound.patch + '-' + lowerBound.pre.join('.') + '.1');
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else
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lowerRange = new SemverRange('^' + lowerBound.major + '.' + lowerBound.minor + '.' + (lowerBound.patch + 1));
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}
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else {
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lowerRange = new SemverRange('^' + lowerBound.toString());
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}
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// we then intersect the upper semver range with the lower semver range
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// if the intersection is empty, we return the upper range only
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var curRange = upperRange ? lowerRange.intersect(upperRange) || upperRange : lowerRange;
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// the largest or highest union range wins
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if (!outRange || !outRange.contains(curRange) && (curRange.gt(outRange) || curRange.contains(outRange)))
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outRange = curRange;
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});
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return outRange;
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}
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