Hi - it would be really nice if the fileExists() step supported file globbing:

if (fileExists('foo/bar*')) {
    // ... 
}

Currently the only way I can find to do this is an awkward use of the compgen command inside a try/catch, and this will only work on Unix:

try {
    sh "compgen -G 'foo/bar*'"
    // ... 
}
catch (err) {
    pass
}