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antenvironment-variables
user855
user855

Reputation: 19948

How to set the path environment variable from ant script

How to set the path environment variable from ant script

Upvotes: 43

Views: 88118

Answers (7)

Jerry
Jerry

Reputation: 669

In ant, properties are immutable, so David's suggestion above:

<property name="env.foo" value="bar!bar"/>

won't work.

But (with the antcontrib-library) variables are mutable, so this works:

<var name="env.foo" value="bar!bar"/>

NOTE: to use the antcontrib-library download it from here: ANT Contrib - Download

This gets the job done, but seems like a dastardly trick.

So to your specific question, try:

<taskdef resource="net/sf/antcontrib/antlib.xml">
    <classpath>
        <pathelement location="${basedir}/lib/ant-contrib-1.0b3.jar" />
    </classpath>
</taskdef>

<var name="env.PATH" value="some:custom:value"/>

Upvotes: 5

Jens A. Koch
Jens A. Koch

Reputation: 41796

You can use to expand the path:

And then you can execute for instance sh from ant to export the environment variable:

<property environment="env"/>
<exec executable="sh">
   <arg value="-c"/>
   <arg value="export PATH=${env.Path}:${myPath}"/>
</exec>

Or execute your command and set env with value, like so:

<property environment="env"/>
<exec executable="${your.command}">
   <env key="PATH" value="${env.PATH}:${your.directory}"/>
</exec>

Upvotes: 1

komelio
komelio

Reputation: 19

I found it works by quote the value of variable

<exec executable="setx">
    <arg line="Path &quot;${env.Path};c:\testPath&quot;" />
    <arg line="/m" />
</exec>

Upvotes: 1

Andreas Covidiot
Andreas Covidiot

Reputation: 4765

since I don't have enough reputation to comment on the <variable ... suggestions my comment as an answer ... :-/

In ("newer") ant-contrib (extra ANT package) the task is not called <variable ... but <var ...!

(but it didn't work for me anyways since I think the manipulation of the env.* (created by <property environment="env" ... /> task) Java properties/variables is only relevant for tasks/processes evaluating these Java properties which are not automatically "synced back" to the OS environment variables)

Upvotes: 0

Rutwig
Rutwig

Reputation: 37

You can use setx command to set the environment variables.

For setx command help refer http://ss64.com/nt/setx.html

<exec executable="setx.exe">
  <arg line="Path C:\jdk1.5.0_12\bin"/>
  <arg line="/m"/>
</exec>

Upvotes: 2

David W.
David W.

Reputation: 107090

Is this for an <exec> task?

You can set environment variables when you run an <exec> task:

<exec executable="${my.command}">
    <env key="foo" value="bar"/>
    <arg line="some value"/>
</exec>

You can use <property environment="env"/> to expand the path:

<property environment="env"/>
<exec executable="${my.command}">
   <env key="PATH" value="${env.PATH}:${my.directory}"/>
</exec>

If this is for some custom task that requires an environment variable, but doesn't allow you to set the environment variable in the task if one isn't set, you can try setting it in:

<property environment="env"/>
<property name="env.foo" value="bar!bar"/>

This might set an environment variable called foo to the value of bar!bar!. I remember something about this, but wasn't able to get it to work.

The other thing you can do is have one ant script execute another and have the first ant script set the environment value. I did this when I had to set ANT_OPT.

Upvotes: 67

Vicky
Vicky

Reputation: 121

To set the environment variables through Ant, try calling exec task and set the command line values. I have not tried this by the way, but it should work.

Upvotes: 0

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