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From: "Prabhakar Chaganti" <prabhakar@chaganti.net>
To: ant-user@jakarta.apache.org
Date: Tue, 31 Jul 2001 10:09:35 -0400
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Subject: Setting a W2K environment variable from build.xml
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Hi all:

I am using ant version 1.4alpha on Win2K running JDK 1.3.0.

I need to set an environment variable in W2K such as APP_HOME, 
before my task executes. This can be done from a shell by doing:
	"set APP_HOME=c:\apphome"

I am trying to use the following fragment to accomplish the same 
thing from inside my build.xml:
	    <target name="test">
        		<exec executable="set" os="Windows 2000">
            		<arg line="APP_HOME=c:\apphome" />
        		</exec>
    		</target>

This fails with the following error:
        Execute failed: java.io.IOException: CreateProcess: set 		
		APP_HOME=c:\apphome error=2
        --- Nested Exception ---
        java.io.IOException: CreateProcess: set 						
			APP_HOME=c:\apphome error=2
                at java.lang.Win32Process.create(Native Method)
                at java.lang.Win32Process.<init>(Win32Process.java:66)
                at java.lang.Runtime.execInternal(Native Method)
                at java.lang.Runtime.exec(Runtime.java:551)
                at java.lang.reflect.Method.invoke(Native Method)
                at 										
org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.ex
ec(Execute.java:564)
                at 
org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:384)
                at 
org.apache.tools.ant.taskdefs.ExecTask.runExecute(ExecTask.java:2
38)
                at 
org.apache.tools.ant.taskdefs.ExecTask.runExec(ExecTask.java:254)
                at 
org.apache.tools.ant.taskdefs.ExecTask.execute(ExecTask.java:165)
                at org.apache.tools.ant.Task.perform(Task.java:240)
                at org.apache.tools.ant.Target.execute(Target.java:164)
                at 
org.apache.tools.ant.Target.performTasks(Target.java:182)
                at 
org.apache.tools.ant.Project.executeTarget(Project.java:568)
                at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:252)
                at 
org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:120)
                at org.apache.tools.ant.Task.perform(Task.java:240)
                at org.apache.tools.ant.Target.execute(Target.java:164)
                at 
org.apache.tools.ant.Target.performTasks(Target.java:182)
                at 
org.apache.tools.ant.Project.executeTarget(Project.java:568)
                at 
org.apache.tools.ant.Project.executeTargets(Project.java:527)
                at org.apache.tools.ant.Main.runBuild(Main.java:453)
                at org.apache.tools.ant.Main.start(Main.java:154)
                at org.apache.tools.ant.Main.main(Main.java:177)


Can anyone point out what is wrong with the xml. I looked at the list 
archives, and some people suggested using a batch file just to set 
the environment variables. Is this the only option ?

Any info truly appreciated.

thanks
prabhakar