semver-range

npm package (research tool) to help with comparison of semantic version ranges (semver).

• semver-range.Comparison categorize changes into upgrade, downgrade, not changed, prerelease, url, and other.
• semver-range.Diff categorizes changes into major, premajor, minor, premino, patch, prepatch, prerelease, url, and other

For example you can use this tool if you want to compare ^4.0.x and 4.x which is technically no change in the version.

Example usage:

const semverCompare = require('./semver-range').semverCompare;
const semverDiff = require('./semver-range').semverDiff;
 
console.log('^4.0.x AND 4.x: ', semverCompare('^4.0.x', '4.x'), '~', semverDiff('^4.0.x', '4.x'));
 
// output:
// ^4.0.x AND 4.x:  not_changed ~ other

see test.js for more examples, and run npm test to print examples to stdout.

Note:

In some cases it's hard to tell if a change of version will actually result in an upgrade or downgrade and it can be different depending on the package. To resolve this issue I made some assumptions which you should consider if you use this package. It is as described bellow: When comparing v1 and v2, Each range has an upper bound and a lower bound.

• If v2.upper is decreased and v2.lower is increased it can be upgrade or downgrade depending on the latest version of that specific package o n npm.
• If v1 or v2 is a latest, stable, etc then it will be categorized as 'other'!
• Upgrade = When v2.lower and/or v2.upper is increased (May not be an upgrade depending on latest version of that specific package o n npm.)
• Downgrade = When v2.upper is decreased (May not be an downgrade depending on latest version of that specific package o n npm.)

TO-DO:

• Refactoring
• More test cases