markjfisher / antlr4-plugin Goto Github PK

If the files generated from the grammar are not in the same package as the files using them, the build fails. In the example project here, move Calc to the another project - I tried example.subpackage, and the build fails. I've seen similar problems in my own project as well.

Hi there! I have been looking into getting antlr4 running within a Gradle build and I have come up with the following code which I think you will find useful.

task generateParser(type: JavaExec) {
  def outputDir = "$buildDir/antlr"

  def deps = ['org.antlr:antlr4:4.1']
  def target = 'grammars/Template.g4'

  classpath = configurations.detachedConfiguration(*deps.collect({
    dependencies.create(it)
  }))

  args += [
    '-o', outputDir,
    target
  ]

  main = 'org.antlr.v4.Tool'
}

Some of the stuff there I got from looking at your source. However I decided I simply needed the task without meddling around with plugins. Hope you find this code useful anyway (because now you don't need to have those dependencies in your user's buildscripts). Sorry a bit lazy to submit a pull request =)

This project's author forgot to specify under which license his source code is available.