Package org.apache.tools.ant.taskdefs.launcher

# Class CommandLauncher

java.lang.Object
org.apache.tools.ant.taskdefs.launcher.CommandLauncher

Direct Known Subclasses:
  `CommandLauncherProxy`, `Java13CommandLauncher`

public class CommandLauncher extends Object
A command launcher for a particular JVM/OS platform. This class is a general purpose command launcher which can only launch commands in the current working directory.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected static FileUtils`
  `FILE_UTILS`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CommandLauncher()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Process`
  `exec​(Project project, String[] cmd, String[] env)`
  Launches the given command in a new process.
  `Process`
  `exec​(Project project, String[] cmd, String[] env, File workingDir)`
  Launches the given command in a new process, in the given working directory.
  `static CommandLauncher`
  `getShellLauncher​(Project project)`
  Obtains the shell launcher configured for the given project or the default shell launcher.
  `static CommandLauncher`
  `getVMLauncher​(Project project)`
  Obtains the VM launcher configured for the given project or the default VM launcher.
  `static void`
  `setShellLauncher​(Project project, CommandLauncher launcher)`
  Sets the shell launcher to use for the given project.
  `static void`
  `setVMLauncher​(Project project, CommandLauncher launcher)`
  Sets the VM launcher to use for the given project.

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### FILE_UTILS

    protected static final FileUtils FILE_UTILS

- ## Constructor Details

  - ### CommandLauncher

    public CommandLauncher()

- ## Method Details

  - ### exec

    public Process exec​(Project project, String[] cmd, String[] env) throws IOException
    Launches the given command in a new process.
    Parameters:
      `project` - The project that the command is part of.
      `cmd` - The command to execute.
      `env` - The environment for the new process. If null, the environment of the current process is used.
    Returns:
      the created Process.
    Throws:
      `IOException` - if attempting to run a command in a specific directory.

  - ### exec

    public Process exec​(Project project, String[] cmd, String[] env, File workingDir) throws IOException
    Launches the given command in a new process, in the given working directory.
    Parameters:
      `project` - The project that the command is part of.
      `cmd` - The command to execute.
      `env` - The environment for the new process. If null, the environment of the current process is used.
      `workingDir` - The directory to start the command in. If null, the current directory is used.
    Returns:
      the created Process.
    Throws:
      `IOException` - if trying to change directory.

  - ### getShellLauncher

    public static CommandLauncher getShellLauncher​(Project project)
    Obtains the shell launcher configured for the given project or the default shell launcher.
    Parameters:
      `project` - Project
    Returns:
      CommandLauncher

  - ### getVMLauncher

    public static CommandLauncher getVMLauncher​(Project project)
    Obtains the VM launcher configured for the given project or the default VM launcher.
    Parameters:
      `project` - Project
    Returns:
      CommandLauncher

  - ### setVMLauncher

    public static void setVMLauncher​(Project project, CommandLauncher launcher)
    Sets the VM launcher to use for the given project.
    Parameters:
      `project` - Project
      `launcher` - CommandLauncher

  - ### setShellLauncher

    public static void setShellLauncher​(Project project, CommandLauncher launcher)
    Sets the shell launcher to use for the given project.
    Parameters:
      `project` - Project
      `launcher` - CommandLauncher