build.gradle

apply plugin: 'java'

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.antlr:antlr4:4.13.2'
}

task generateLexer(type:JavaExec) {
  def lexerName = "CalcLexer"
  inputs.file("$ANTLR_SRC/${lexerName}.g4")  
  outputs.file("$GEN_JS_SRC/${lexerName}.ts")
  outputs.file("$GEN_JS_SRC/${lexerName}.interp")
  outputs.file("$GEN_JS_SRC/${lexerName}.tokens")
  main = 'org.antlr.v4.Tool'
  classpath = sourceSets.main.runtimeClasspath
  workingDir = ANTLR_SRC
  args = ['-Dlanguage=TypeScript', "${lexerName}.g4", '-o', '../../main-generated/typescript/']     
}

task generateParser(type:JavaExec) {
  dependsOn generateLexer
  def lexerName = "CalcLexer"
  def parserName = "CalcParser"
  inputs.file("$ANTLR_SRC/${parserName}.g4")
  inputs.file("$GEN_JS_SRC/${lexerName}.tokens")
  outputs.file("$GEN_JS_SRC/${parserName}.ts")
  outputs.file("$GEN_JS_SRC/${parserName}.interp")
  outputs.file("$GEN_JS_SRC/${parserName}.tokens")
  main = 'org.antlr.v4.Tool'
  classpath = sourceSets.main.runtimeClasspath
  args = ['-Dlanguage=TypeScript', "${parserName}.g4", '-no-listener', '-no-visitor', '-o', '../../main-generated/typescript/']
  workingDir = ANTLR_SRC
}