auto-patch-examplemod.gradle

import java.util.regex.Pattern

afterEvaluate {
    tasks.updateBuildScript.doLast {
        def buildScriptFile = getFile("build.gradle")
        def text = buildScriptFile.text
        def originalText = text

        // remove any existing patches
        text = Pattern.compile("//PatchStart.*//PatchEnd\\n", Pattern.DOTALL).matcher(text).replaceAll("")

        // add mapping generator plugin
        def m = Pattern.compile("plugins \\{(.*?)\\}", Pattern.DOTALL).matcher(text)
        m.find()
        text = m.replaceFirst("plugins {" + m.group(1) + """//PatchStart
    id 'io.github.legacymoddingmc.mappinggenerator' version '$mappingGeneratorVersion'
//PatchEnd
}""")

        buildScriptFile.text = text

        if(text != originalText) {
            println("\nApplied new patches to the build script. Please REIMPORT the project or RESTART your IDE!")
        }
    }
}