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File Content: `diff.js`

'use strict'

const parse = require('./parse.js')

const diff = (version1, version2) => {
  const v1 = parse(version1, null, true)
  const v2 = parse(version2, null, true)
  const comparison = v1.compare(v2)

  if (comparison === 0) {
    return null
  }

  const v1Higher = comparison > 0
  const highVersion = v1Higher ? v1 : v2
  const lowVersion = v1Higher ? v2 : v1
  const highHasPre = !!highVersion.prerelease.length
  const lowHasPre = !!lowVersion.prerelease.length

  if (lowHasPre && !highHasPre) {
    // Going from prerelease -> no prerelease requires some special casing

    // If the low version has only a major, then it will always be a major
    // Some examples:
    // 1.0.0-1 -> 1.0.0
    // 1.0.0-1 -> 1.1.1
    // 1.0.0-1 -> 2.0.0
    if (!lowVersion.patch && !lowVersion.minor) {
      return 'major'
    }

    // If the main part has no difference
    if (lowVersion.compareMain(highVersion) === 0) {
      if (lowVersion.minor && !lowVersion.patch) {
        return 'minor'
      }
      return 'patch'
    }
  }

  // add the `pre` prefix if we are going to a prerelease version
  const prefix = highHasPre ? 'pre' : ''

  if (v1.major !== v2.major) {
    return prefix + 'major'
  }

  if (v1.minor !== v2.minor) {
    return prefix + 'minor'
  }

  if (v1.patch !== v2.patch) {
    return prefix + 'patch'
  }

  // high and low are preleases
  return 'prerelease'
}

module.exports = diff

Name	Size	Permission
clean.js	205 bytes	0644
cmp.js	961 bytes	0644
coerce.js	2004 bytes	0644
compare-build.js	281 bytes	0644
compare-loose.js	132 bytes	0644
compare.js	170 bytes	0644
diff.js	1421 bytes	0644
eq.js	126 bytes	0644
gt.js	124 bytes	0644
gte.js	127 bytes	0644
inc.js	478 bytes	0644
lt.js	124 bytes	0644
lte.js	127 bytes	0644
major.js	136 bytes	0644
minor.js	136 bytes	0644
neq.js	128 bytes	0644
parse.js	331 bytes	0644
patch.js	136 bytes	0644
prerelease.js	234 bytes	0644
rcompare.js	132 bytes	0644
rsort.js	163 bytes	0644
satisfies.js	247 bytes	0644
sort.js	161 bytes	0644
valid.js	176 bytes	0644

File Content: diff.js

File Content: `diff.js`