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Diffstat (limited to 'backend/node_modules/semver/functions/diff.js')
-rw-r--r-- | backend/node_modules/semver/functions/diff.js | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/backend/node_modules/semver/functions/diff.js b/backend/node_modules/semver/functions/diff.js new file mode 100644 index 0000000..fc224e3 --- /dev/null +++ b/backend/node_modules/semver/functions/diff.js @@ -0,0 +1,65 @@ +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' + } + + // Otherwise it can be determined by checking the high version + + if (highVersion.patch) { + // anything higher than a patch bump would result in the wrong version + return 'patch' + } + + if (highVersion.minor) { + // anything higher than a minor bump would result in the wrong version + return 'minor' + } + + // bumping major/minor/patch all have same result + return 'major' + } + + // 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 |