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semver-range.js
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semver-range.js
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const semver = require('semver');
/**
* semver{1|2} can be a range, comparator, or just a simple semantic version
* This compares the upper bounds.
* Returns 'upgraded' if semver1 < emver2 (at any point)
* Returns 'not_changed' if semver1 = semver2
* Returns 'downgraded' if semver1 > semver2.
* Returns 'prerelease' if prerelease version
* Returns 'url' if URL/path
* Returns 'other' if other
*
* @param {String} semver1
* @param {String} semver2
* @return {String}
*/
exports.semverCompare = function (semver1, semver2) {
// semver1 is in the format (\d+.\d+.\d+)
if (semver1.search(/(\d+.\d+.\d+)/) === 0) {
var Upper1 = semver1;
var Lower1 = semver1;
}
// semver1 is a range or other format (not only a version like 1.0.0)
else {
if (semver1.search(/(\/)/) != -1) {
return 'url'; // URL/path
}
else if (semver1.search(/(alpha|beta)/) != -1) {
return 'prerelease'; // prerelease versioning
}
else if (semver1.search(/(\d+.\d+.\d+)/ != -1)) {
try {
let semver1Slice = semver.toComparators(semver1)[0];
if (semver1Slice[1]) {
var Upper1 = semver1Slice[1].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
if (semver1Slice[0]) {
var Lower1 = semver1Slice[0].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
} catch (error) {
return 'other';
}
}
else {
return 'other';
}
}
// semver2 is in the format (\d+.\d+.\d+)
if (semver2.search(/(\d+.\d+.\d+)/) === 0) {
var Upper2 = semver2;
var Lower2 = semver2;
}
// semver1 is a range or other format
else {
if (semver2.search(/(\/)/) != -1) {
return 'url'; // URL/path
}
else if (semver2.search(/(alpha|beta)/) != -1) {
return 'prerelease'; // prerelease versioning
}
else if (semver2.search(/(\d+.\d+.\d+)/ != -1)) {
try {
let semver2Slice = semver.toComparators(semver2)[0];
if (semver2Slice[1]) {
var Upper2 = semver2Slice[1].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
if (semver2Slice[0]) {
var Lower2 = semver2Slice[0].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
} catch (error) {
return 'other';
}
}
else {
return 'other';
}
}
// At this point Upper{1|2}, and Lower{1|2} should be known (if they exist)
if (Upper1 != undefined) {
if (Upper2 != undefined) {
try {
if (semver.lt(Upper1, Upper2)) {
return 'upgraded';
}
else if (semver.gt(Upper1, Upper2)) {
return 'downgraded';
}
} catch (error) {
return 'other'
}
} else {
return 'upgraded';
}
} else if (Upper2 != undefined) {
// Second parameter has upper bound so it interpreted as a downgrade
return 'downgraded';
}
if (Lower1 != undefined) {
if (Lower2 != undefined) {
try {
if (semver.lt(Lower1, Lower2)) {
if (semver.gt(Lower1, Lower2)) {
return 'other';
}
return 'upgraded';
}
} catch (error) {
return 'other';
}
}
}
return 'not_changed'; // If not any conditions above I assume they are equal
}
/**
* semver{1|2} can be a range, comparator, or just a simple semantic version
* This returns an output similar to the official semver.diff();
*
* How it works:
* returns semver.diff(Upper1, Upper2) if both Upper1 and Upper2 exist
* otherwise semver.diff(Lower1, Lower2) if both Lower1 and Lower2 exist
* if the diff was not possible to find return 'other'
*
* Note: if the version is not changed it returns 'other'
*
* @param {String} semver1
* @param {String} semver2
* @return {String} {'major' | 'premajor' | 'minor' | 'preminor' | 'patch' | 'prepatch' | 'prerelease' | 'url' | 'other'}
*/
exports.semverDiff = function (semver1, semver2) {
// semver1 is in the format (\d+.\d+.\d+)
if (semver1.search(/(\d+.\d+.\d+)/) === 0) {
var Upper1 = semver1;
var Lower1 = semver1;
}
// semver1 is a range or other format (not only a version like 1.0.0)
else {
if (semver1.search(/(\/)/) != -1) {
return 'url'; // URL/path
}
else if (semver1.search(/(alpha|beta)/) != -1) {
return 'prerelease'; // prerelease versioning
}
else if (semver1.search(/(\d+.\d+.\d+)/ != -1)) {
try {
let semver1Slice = semver.toComparators(semver1)[0];
if (semver1Slice[1]) {
var Upper1 = semver1Slice[1].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
if (semver1Slice[0]) {
var Lower1 = semver1Slice[0].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
} catch (error) {
return 'other';
}
}
else {
return 'other';
}
}
// semver2 is in the format (\d+.\d+.\d+)
if (semver2.search(/(\d+.\d+.\d+)/) === 0) {
var Upper2 = semver2;
var Lower2 = semver2;
}
// semver1 is a range or other format
else {
if (semver2.search(/(\/)/) != -1) {
return 'url'; // URL/path
}
else if (semver2.search(/(alpha|beta)/) != -1) {
return 'prerelease'; // prerelease versioning
}
else if (semver2.search(/(\d+.\d+.\d+)/ != -1)) {
try {
let semver2Slice = semver.toComparators(semver2)[0];
if (semver2Slice[1]) {
var Upper2 = semver2Slice[1].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
if (semver2Slice[0]) {
var Lower2 = semver2Slice[0].match(/(>|<|<=|>=)(\d+.\d+.\d+)/m)[2];
}
} catch (error) {
return 'other';
}
}
else {
return 'other';
}
}
// At this point I know Upper{1|2} and Lower{1|2} (if they exist)
if (Upper1 != undefined) {
if (Upper2 != undefined) {
try {
const diff = semver.diff(Upper1, Upper2);
if (diff != null)
return diff;
} catch (error) {
return 'other'
}
} else {
return 'other'; // This is potentially an upgrade but returning as other since we don't know the amount
}
} else if (Upper2 != undefined) {
// Second parameter has upper bound so it interpreted as a downgrade
return 'other';
}
if (Lower1 != undefined) {
if (Lower2 != undefined) {
if (semver.lt(Lower1, Lower2)) {
if (semver.gt(Lower1, Lower2)) {
return 'other';
}
try {
const diff = semver.diff(Lower1, Lower2);
if (diff === null)
return 'other';
} catch (error) {
return 'other';
}
}
}
}
return 'other'; // If not any conditions above I assume they are equal
}