Git pre-commit hook errors while executing another script

Question

I have written git pre-commit hook using groovy script. I am using Windows 7. Since the files located at

.git/hooks/pre-commit

are not version controlled, I have moved these pre-commit hooks to project sub-repository.

${PROJECT_REPO}/git-hooks directory.

This is the script in file @ .git/hooks/pre-commit

#!/usr/bin/env groovy
public class PreCommitHooks
{
    public static boolean CheckBannedFilesToCommit() 
    {
        def process = "cmd /c groovy ../../git-hooks/pre-commit".execute();
        process.waitFor();
        if (process.exitValue())
        { 
            return false;
        }
        return true;
    }
}

// Create an instance of PreCommitHooks() class and execute list of hooks.
preCommitHook = new PreCommitHooks();
if (!preCommitHook.CheckBannedFilesToCommit())
{
    System.exit(1);
}
else
{
    System.exit(0);
}

Script in file @ git-hooks/pre-commit

#!/usr/bin/env groovy

This is pseudo code only 
process all the hook info.
.... 
if (!bSuccess)
    system.exit(1);
else
    system.exit(0);

I have installed all the ${GROOVY_HOME} and ${JAVA_HOME} paths correctly, verified using windows command line. My scripts run perfectly when called using Windows Command line.

${PROJECT_REPO}/.git/hooks>groovy pre-commit

Since all the scripts are working, I proceeded to test my pre-commit hook using smart-git

File @ .git/hooks/pre-commit gets executed properly, it is able to find ${GROOVY_HOME} and ${JAVA_HOME} paths properly. But when executing following line

def process = "cmd /c groovy ../../git-hooks/pre-commit".execute();

It fails with following error.

Error: JAVA_HOME is set to invalid directory: C:\Program Files (x86)\Java\Jdk1.8.0_51 Please set the JAVA_HOME variable in your environment to match the location of your Java installation.

Can anyone please help me resolve this error?

I am looking for a groovy script solution instead of bash script.

Answer 1

I ended up using windows symlink instead.

cmd /c mklink /H ${link_file_full_path} ${Target_file_full_path}

Calling a groovy script (located at $WORK_TREE} from another groovy script located at $GIT_DIR did not work.

I believe it must be to do with environment variables. Smartgit passes all the environment variables to first script and that information is lost when another script is called.