scala_maven.ScalaHelpMojo Maven / Gradle / Ivy

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/*
 * This is free and unencumbered software released into the public domain.
 * See UNLICENSE.
 */
package scala_maven;

import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import scala_maven_dependency.Context;
import scala_maven_executions.JavaMainCaller;

/** Display the Scala Compiler help */
@Mojo(name = "help")
public class ScalaHelpMojo extends ScalaMojoSupport {
  /** Determines if help will only display a version */
  @Parameter(property = "maven.scala.help.versionOnly", defaultValue = "false")
  private boolean versionOnly;

  protected JavaMainCaller getScalaCommand() throws Exception {
    Context sc = findScalaContext();
    return getScalaCommand(fork, sc.compilerMainClassName(scalaClassName, false));
  }

  @Override
  public void doExecute() throws Exception {
    JavaMainCaller jcmd;
    if (!versionOnly) {
      jcmd = getScalaCommand();
      jcmd.addArgs("-help");
      jcmd.addArgs("-X");
      jcmd.addArgs("-Y");
      jcmd.run(displayCmd);
    }
    jcmd = getScalaCommand();
    jcmd.addArgs("-version");
    jcmd.run(displayCmd);
  }
}