com.github.mcheely.maven.requirejs.NodeJsRunner Maven / Gradle / Ivy

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package com.github.mcheely.maven.requirejs;

import org.apache.commons.exec.CommandLine;
import org.apache.commons.exec.DefaultExecutor;
import org.apache.commons.exec.ExecuteException;
import org.mozilla.javascript.ErrorReporter;

import java.io.File;
import java.io.IOException;

public class NodeJsRunner implements Runner {
  private static final String[] nodeCommands = new String[]{"node", "nodejs"};

  private String nodeJsFile;

  public NodeJsRunner(String nodeJsFile) {
    this.nodeJsFile = nodeJsFile;
  }

  public static String detectNodeCommand() {
    for (String nodeCmd : nodeCommands) {
      CommandLine cmdLine = CommandLine.parse(nodeCmd);
      cmdLine.addArguments("--version");

      DefaultExecutor executor = new DefaultExecutor();

      try {
        if (executor.execute(cmdLine) == 0) {
          return nodeCmd;
        }
      } catch (IOException e) {
        //Keep testing.
      }
    }

    return null;
  }

  @Override
  public ExitStatus exec(File mainScript, String[] args, ErrorReporter reporter) {
    ExitStatus exitStatus = new ExitStatus();

    try {
      boolean result = executeScript(nodeJsFile, mainScript.getAbsolutePath(), args);
      exitStatus.setExitCode(result?0:1);
    } catch (IOException e) {
      exitStatus.setExitCode(1);
    }

    return exitStatus;
  }

  private boolean executeScript(String nodeJsFile, String scriptName, String[] params) throws IOException {
    CommandLine cmdLine = CommandLine.parse(nodeJsFile);
    cmdLine.addArgument(scriptName);
    cmdLine.addArguments(params);
    DefaultExecutor executor = new DefaultExecutor();
    try {
      return executor.execute(cmdLine) == 0;
    } catch (ExecuteException e) {
      return e.getExitValue() == 0;
    }
  }
}