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sloproxy
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1.9 kB · 69 lines
Go
at main
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970package pluginstore
import ( "strconv" "strings")
// UpdateAvailable reports whether latest should be offered as an upgrade over// installed. A leading "v"/"V" is ignored on both sides. Versions are compared// numerically when both are dotted release numbers, so an installed version// newer than the registry one is not reported as an update; otherwise any// difference counts as an update.func UpdateAvailable(installed, latest string) bool { installed = normalizeVersion(installed) latest = normalizeVersion(latest) if installed == "" || latest == "" || installed == latest { return false } comparison, comparable := compareVersions(installed, latest) if !comparable { return true } return comparison < 0}
func normalizeVersion(version string) string { version = strings.TrimSpace(version) if len(version) > 1 && (version[0] == 'v' || version[0] == 'V') { version = version[1:] } return version}
// compareVersions compares dotted numeric versions segment by segment, with// missing segments treated as zero. It reports false when either version// contains a non-numeric segment.func compareVersions(a, b string) (int, bool) { segmentsA := strings.Split(a, ".") segmentsB := strings.Split(b, ".") length := len(segmentsA) if len(segmentsB) > length { length = len(segmentsB) } for index := 0; index < length; index++ { numberA, okA := versionSegment(segmentsA, index) numberB, okB := versionSegment(segmentsB, index) if !okA || !okB { return 0, false } if numberA != numberB { if numberA < numberB { return -1, true } return 1, true } } return 0, true}
func versionSegment(segments []string, index int) (int64, bool) { if index >= len(segments) { return 0, true } number, errParse := strconv.ParseInt(segments[index], 10, 64) if errParse != nil || number < 0 { return 0, false } return number, true}