checkstyle.gradle

apply plugin: 'checkstyle'

checkstyle {
    toolVersion = '10.12.3'
}

def filterCheckstyleFiles(String diffFiles){
    ArrayList<String> filterList = new ArrayList<String>();
    String [] files = diffFiles.split("\\n")
    for (String file : files) {
        if (file.endsWith(".java")
                || file.endsWith(".xml")
                || file.endsWith(".properties")
        ) {
            filterList.add(file)
        }
    }
    return filterList
}

task checkstyle(type: Checkstyle) {
    source 'src'

    exclude '**/gen/**'
    exclude '**/test/**'
    exclude '**/androidTest/**'
    exclude '**/R.java'
    exclude '**/BuildConfig.java'
    exclude '**/authpack.java'

    if (project.hasProperty('commit_diff_files')) {
        def ft = filterCheckstyleFiles(project.property('commit_diff_files'))
        if (ft.size() > 0) {
            for (int i = 0; i < ft.size(); i++) {
                String splitter = ft[i];
                String[] fileName = splitter.split("/");
                include '**/' + fileName[fileName.size() - 1];
            }
        } else {
            include 'null'
        }

        println("checkstyle >> check commit diff files...")
        println("checkstyle >> " + includes.toList())
    } else {
        include '**/*.java'
        println("checkstyle >> check all java files...")
    }

    configFile new File(rootDir, "checkstyle.xml")
    classpath = files()
}