///////////////////////////////////////////////////////////////////////////
/// Checker Framework pluggable type-checking
///

repositories {
    mavenCentral()
}

configurations {
    checkerFrameworkCheckerJar {
        description = 'the Checker Framework, including the Type Annotations compiler'
    }

    checkerFrameworkAnnotatedJDK {
        description = 'a copy of JDK classes with Checker Framework type qualifers inserted'
    }
}

// By default, use Checker Framework from Maven Central.
// Pass -PcfLocal to use a locally-built version of the Checker Framework.
dependencies {
    if (!rootProject.hasProperty('cfLocal')) {
        checkerFrameworkAnnotatedJDK "org.checkerframework:jdk8:${checkerFrameworkVersion}"
        checkerFrameworkCheckerJar "org.checkerframework:checker:${checkerFrameworkVersion}"
        implementation "org.checkerframework:checker-qual:${checkerFrameworkVersion}"
    } else if (System.getenv("CHECKERFRAMEWORK") == null) {
        throw new GradleException("Environment variable CHECKERFRAMEWORK is not set")
    } else if (! file(System.getenv("CHECKERFRAMEWORK")).exists()) {
        throw new GradleException("Environment variable CHECKERFRAMEWORK is set to non-existent directory " + System.getenv("CHECKERFRAMEWORK"));
    } else {
        ext.checkerframeworkdist = "$System.env.CHECKERFRAMEWORK/checker/dist"
        checkerFrameworkAnnotatedJDK fileTree(dir: "${ext.checkerframeworkdist}", include: "jdk8.jar")
        checkerFrameworkCheckerJar fileTree(dir: "${ext.checkerframeworkdist}", include: 'checker.jar')
        implementation fileTree(dir: "${ext.checkerframeworkdist}", include: 'checker-qual.jar')
    }
}

// // To type-check all projects.
// allprojects {
//   tasks.withType(JavaCompile).all { JavaCompile compile ->
//     compile.doFirst {
//       compile.options.compilerArgs = [
//         '-processor', 'org.checkerframework.checker.formatter.FormatterChecker,org.checkerframework.checker.index.IndexChecker,org.checkerframework.checker.lock.LockChecker,org.checkerframework.checker.nullness.NullnessChecker,org.checkerframework.checker.signature.SignatureChecker',
//         '-Xmaxerrs', '10000',
//         '-Awarns',    // -Awarns turns Checker Framework errors into warnings
//         '-AcheckPurityAnnotations',
//         '-processorpath', "${configurations.checkerFrameworkCheckerJar.asPath}",
//         "-Xbootclasspath/p:${configurations.checkerFrameworkAnnotatedJDK.asPath}",
//         "-Astubs=$System.env.CHECKERFRAMEWORK/checker/resources/javadoc.astub" // TODO: does not work when downloading from Maven Central
//       ]
//     }
//   }
// }

// To typecheck only the current project's main source set (in a multi-project
// build), use this instead:
compileJava {
    doFirst {
        options.compilerArgs = [
                '-processor', 'org.checkerframework.checker.nullness.NullnessChecker',
                '-processor', 'org.checkerframework.checker.optional.OptionalChecker',
                '-Xmaxerrs', '10000',
                '-Xmaxwarns', '10000',
                // '-Awarns',      // -Awarns turns Checker Framework errors into warnings
                //'-AcheckPurityAnnotations', // Disabled for Velocity, wish we could do better
                '-processorpath', "${configurations.checkerFrameworkCheckerJar.asPath}",
                "-Xbootclasspath/p:${configurations.checkerFrameworkAnnotatedJDK.asPath}"
        ]
    }
}