plugins {
    id 'java'
    id 'antlr'
}

group = 'com.mpl'
version = '0.1-alpha'

repositories {
    mavenCentral()
}

dependencies {
    antlr 'org.antlr:antlr4:4.13.1'
    implementation 'org.antlr:antlr4-runtime:4.13.1'
    
    testImplementation 'junit:junit:4.13.2'
    testImplementation 'org.hamcrest:hamcrest:2.2'
}

generateGrammarSource {
    maxHeapSize = "64m"
    // -Werror: any ANTLR warning (e.g. 184, token shadowing) fails the build
    arguments += ["-visitor", "-listener", "-Werror", "-package", "com.mpl.parser"]
    outputDirectory = file("${project.buildDir}/generated-src/antlr/main/com/mpl/parser")
}

compileJava.dependsOn generateGrammarSource

sourceSets {
    main {
        antlr {
            // The Gradle ANTLR plugin defaults to src/main/antlr; the grammar
            // lives in src/main/antlr4 (Maven layout).
            srcDirs = ['src/main/antlr4']
        }
        java {
            srcDirs += "${project.buildDir}/generated-src/antlr/main"
        }
    }
}

test {
    // ConformanceCountTest reads these; declaring them makes the up-to-date
    // check re-run tests when the README claim or the corpus changes.
    inputs.file('README.md')
    inputs.dir('conformance/corpus')
    testLogging {
        events "passed", "skipped", "failed"
        exceptionFormat "full"
    }
}

// ParseExamples lives in the test source set, so the task needs the test
// runtime classpath (with main.runtimeClasspath the class was never found).
task parseExamples(type: JavaExec, dependsOn: testClasses) {
    mainClass = 'com.mpl.test.ParseExamples'
    classpath = sourceSets.test.runtimeClasspath
    args = ['examples']
}

// Grammar-check CLI (see ParseCheck.java): file paths or '-' for stdin via
// --args passthrough, e.g. ./gradlew -q parseCheck --args='examples/01_hello_world.mpl'
task parseCheck(type: JavaExec, dependsOn: classes) {
    mainClass = 'com.mpl.tools.ParseCheck'
    classpath = sourceSets.main.runtimeClasspath
    standardInput = System.in
}