function canPiston()
{
$errors = array();
if (!SVN::available()) {
$errors[] = "Subversion is not available.";
}
if (!Piston::available()) {
$errors[] = "Piston is not available.";
}
if (!SVN::isSVNRepo() && !GIT::isGITRepo()) {
$errors[] = "Piston only works on svn working copies and git repositories.";
}
return $errors;
}
}
// Check we're not being re-called before we do anything
$alreadyexists = false;
foreach ($template as $dest => $source) {
if (file_exists($dest)) {
echo "ERROR: Module $dest already exists. This script can not be called multiple times, or upgrade existing modules.\n";
$alreadyexists = true;
}
}
if ($alreadyexists) die;
if ($mode == 'piston') {
echo "Now running piston to add modules. Piston is quite noisy, and can sometimes list errors as fatal that can be ignored.\n";
echo "If errors are shown, please check result before assuming failure\n\n";
}
foreach ($template as $dest => $source) {
if ($mode == 'contribute') {
GIT::ignore($dest);
$source->checkout($dest);
}
else if ($mode == 'piston') $source->piston($dest);
else $source->export($dest);
}
if ($mode == 'piston' && GIT::isGITRepo()) {
echo "\n\nNow commit the changes with something like \"git commit -m 'Import core SilverStripe modules'\"\n";
}
