## 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 java.lang.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
`protected static FileUtils` `FILE_UTILS`

Constructor Summary
`CommandLauncher()`

Method Summary
`java.lang.Process` `exec(Project project, java.lang.String[] cmd, java.lang.String[] env)` Launches the given command in a new process.
`java.lang.Process` `exec(Project project, java.lang.String[] cmd, java.lang.String[] env, java.io.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 Detail

### FILE_UTILS

    protected static final FileUtils FILE_UTILS

Constructor Detail

### CommandLauncher

    public CommandLauncher()

Method Detail

### exec

    public java.lang.Process exec(Project project,
                                  java.lang.String[] cmd,
                                  java.lang.String[] env)
                           throws java.io.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:
    `java.io.IOException` - if attempting to run a command in a specific directory.

### exec

    public java.lang.Process exec(Project project,
                                  java.lang.String[] cmd,
                                  java.lang.String[] env,
                                  java.io.File workingDir)
                           throws java.io.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:
    `java.io.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.

### getVMLauncher

    public static CommandLauncher getVMLauncher(Project project)

  Obtains the VM launcher configured for the given project or the default VM launcher.

### setVMLauncher

    public static void setVMLauncher(Project project,
                                     CommandLauncher launcher)

  Sets the VM launcher to use for the given project.

### setShellLauncher

    public static void setShellLauncher(Project project,
                                        CommandLauncher launcher)

  Sets the shell launcher to use for the given project.