java - 无法使用java进程运行mvn

Question

我正在开发一个 IntelliJ 插件。

我需要在我的java代码中调用一些mvn命令。但奇怪的是，它返回了一个 IOException:

Cannot run program "mvn" (in directory "/Users/ryouyasachi/Getty/semantiful-differentials-getty/getty/dsproj"):
error=2, No such file or directory

这是我的代码:

 /** @return: null if the process does not exit with 0
 *  @return: output if the process exits with 0
 */

public static String runCommand(String directory, List<String> command) {

    ProcessBuilder processBuilder = new ProcessBuilder(command).directory(new File(directory));

    processBuilder.redirectErrorStream(true);

    Process process;
    String output = null;
    try {
        process = processBuilder.start();


        //Pause the current thread until the process is done
        process.waitFor();

        //When the process does not exit properly
        if (process.exitValue() != 0) {

            //Error
            System.out.println("command exited in error: " + process.exitValue());

            //Handle the error
            return null;
        }else {

            output = readOutput(process);
            System.out.println(output);
        }

    } catch (InterruptedException e) {
        System.out.println("Something wrong with command: " +e.getMessage());

    } catch (IOException e) {
        System.out.println("Something wrong with command: " +e.getMessage());
    }

    return output;
}

/**
 *
 * @param process which exits with 0
 * @return The output string of the process
 */
private static String readOutput(Process process){
    BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));


    String line;
    StringBuilder stringBuilder = new StringBuilder();
    try {

        while ((line = in.readLine()) != null) {
            stringBuilder.append(line);
        }

        in.close();

    } catch (IOException e) {
        e.printStackTrace();
    }

    return stringBuilder.toString();
}

PS:1.我可以在项目目录下的提示符中运行我需要的mvn命令。这应该表明项目目录确实存在并且我已经正确安装了maven。

2.我的代码使用 git 命令运行良好。

Answer 1

您是否考虑过使用 Maven Invoker而不是诉诸系统调用？

The Invoker will automatically try to detect a Maven installation by evaluating the system property maven.home and the environment variable M2_HOME

他们没有提及任何有关 PATH 的内容，因此我不确定您的特定问题是否已得到处理，但您的大部分代码都是由调用者开箱即用提供的样板文件。