com.malliina.util.SemanticVersion.scala Maven / Gradle / Ivy
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package com.malliina.util
/** A partial implementation of http://semver.org/.
*/
case class SemanticVersion(version: String) {
val (major, minor, patchString) = version.split("", 3) match {
case Array(ma, mi, pa) => (ma.toInt, mi.toInt, pa)
case Array(ma, mi) => (ma.toInt, mi.toInt, "0")
case Array(ma) => (ma.toInt, 0, "0")
case other => (0, 0, "0")
}
val isPrerelease = patchString contains "-"
val patch = patchInt(patchString)
private def patchInt(p: String) = {
val hyphenIndex = p indexOf "-"
if (hyphenIndex == -1) p.toInt
else p.substring(0, hyphenIndex).toInt
}
def ==(other: SemanticVersion) =
version == other.version // major == other.major && minor == other.minor && patchString == other.patchString
def !=(other: SemanticVersion) = !(this == other)
def <(other: SemanticVersion) = major < other.major ||
(major == other.major && minor < other.minor) ||
(major == other.major && minor == other.minor && patch < other.patch) ||
(major == other.major && minor == other.minor && patch == other.patch && isPrerelease && !other.isPrerelease)
def <=(other: SemanticVersion) = this == other || this < other
def >(other: SemanticVersion) = !(this < other) && this != other
def >=(other: SemanticVersion) = this > other || this == other
}
object SemanticVersion {
def parse(version: String): Either[NumberFormatException, SemanticVersion] =
try {
Right(SemanticVersion(version))
} catch {
case nfe: NumberFormatException => Left(nfe)
}
}