Gradle scripts to make pulling data easier for Fabric mods

fabricVersions.gradle

buildscript {
    dependencies {
        classpath "com.github.yuchi:npm-semver:1.0.0"
    }
}

import com.github.yuchi.semver.Version
import groovy.json.JsonSlurper

import java.util.regex.Matcher
import java.util.regex.Pattern

/**
 * Get the newest available loader version.
 *
 * @return loader version.
 */
static String getNewestLoaderVersion() {
    def loaderVersions = new JsonSlurper().parse(new URL("https://meta.fabricmc.net/v2/versions/loader/"))
    assert loaderVersions instanceof ArrayList<LinkedHashMap> // Type check to to remove visual errors
    return loaderVersions.first().version
}

/**
 * Get correct Yarn version for project's MC version.
 *
 * @param newest whether to return the newest available Yarn version, or the oldest. Oldest may be preferred to avoid
 * invalidating genSources' output.
 * @return the correct Yarn version.
 */
String getChosenYarnVersion(boolean newest) {
    def yarnVersions = new JsonSlurper().parse(
            new URL("https://meta.fabricmc.net/v2/versions/yarn/${project.minecraft_version}"))
    assert yarnVersions instanceof ArrayList<LinkedHashMap> // Type check to to remove visual errors
    return newest ? yarnVersions.first().version : yarnVersions.last().version
}

/**
 * Get the latest MC version.
 *
 * @param isStable if snapshots should be ignored or not.
 * @return the MC version.
 */
static String getLatestMc(boolean isStable) {
    def mcVersions = new JsonSlurper().parse(new URL("https://meta.fabricmc.net/v2/versions/game"))
    assert mcVersions instanceof ArrayList<LinkedHashMap> // Type check to to remove visual errors
    if (!isStable) return mcVersions.first().version
    for (LinkedHashMap mcVer : mcVersions) {
        if (mcVer.stable) return mcVer.version
    }
    return "" // No MC version was found
}

modmenuVersion.gradle

/**
 * Get latest Mod Menu version from Fabric's maven. Not keyed to MC version.
 *
 * @return mod menu version.
 */
// I got tired of having to find the right version, ok?
static String getLatestModMenu() {
    def modMenuVersions = new XmlSlurper().parseText(
            new URL("https://maven.fabricmc.net/io/github/prospector/modmenu/maven-metadata.xml").text)
    // For some reason Groovy was not happy with accessing it as a map, so this nonsense exists
    def x = modMenuVersions.getProperty('versioning')
    return x['latest']
}