Run command-line program in Java without absolute path

Question

I'm trying to run Ant from a Java program. This works:

// Compile project
ProcessBuilder pb =
        new ProcessBuilder("/usr/local/Cellar/ant/1.9.6/libexec/bin/ant", "-f", pathToProject + "build.xml");
Process p = pb.start();
p.waitFor();

However, this program will be used on machines other than my own, so I'd rather instantiate the ProcessBuilder like this:

new ProcessBuilder("ant", "-f", pathToProject + "build.xml");

Although ant -f build.xml works on my Mac terminal, placing the above code in my program outputs java.io.IOException: Cannot run program "ant": error=2, No such file or directory.

How can I programmatically show ProcessBuilder where Ant is located? This program will be run on OS X and possibly Ubuntu.

Note: This question is not Ant-specific. I need use ProcessBuilder to invoke other command-line tools as well.

PKR · Accepted Answer · 2016-07-29 20:56:26Z

0

Inject the absolute path of the ant to ProcessBuilder by making it customizable through properties file.This way you can run on multiple environments just by providing the corresponding path in the properties file.

answered Jul 29, 2016 at 20:56

PKR

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