title: ANTLR 2 SBT plugin dependencies
body: <p>I have defined the following in the build.sbt</p>
  
  <p><code>libraryDependencies += "antlr" % "antlr" % "2.7.7"</code></p>
  
  <p>I have placed my <code>sample.g</code> file in src/main/antlr
  I also have my java files in src/main/java.</p>
  
  <p>I use <code>activator compile</code> to compile the files. The java files are compiled and classes are created, but the parser and lexer file generation doesn't happen for the grammar files. Do I need to set any other configuration for it to automatically generate the files?</p>
  
  <p>Note that the grammar file was written sometime back. Porting to ANTLR 3/4 would require significant effort.</p>