Optimize CobiGen startup process and detection of a monolithic configuration

[EduardKrieger]

The detection of a monolithic configuration occurs late in the startup process and takes place, after a CobiGen object is created, in the configurationHolder by a simple query whether the passed path of the configuration contains a template sets. This can be checked earlier and the DeprecatedMonolithicConfigurationException can be thrown faster and would improve the startup of Cobigen.

Throw of the Exception:

cobigen/cobigen/cobigen-core/src/main/java/com/devonfw/cobigen/impl/CobiGenFactory.java

Lines 101 to 102 in 27dced6

	if (!allowMonolithicConfiguration && !configurationHolder.isTemplateSetConfiguration()) {
	throw new DeprecatedMonolithicConfigurationException(Paths.get(configFileOrFolder));

The check for a template-sets configuration

cobigen/cobigen/cobigen-core/src/main/java/com/devonfw/cobigen/impl/config/ConfigurationHolder.java

Lines 186 to 195 in 27dced6

	public boolean isTemplateSetConfiguration() {
	// TODO: Replace with a better logic for template set detection later f.e. groupid, see: https://github.com/devonfw/cobigen/issues/1660
	if (this.configurationPath.toUri().getScheme().equals("jar")
	|| !this.configurationPath.getFileName().toString().equals(ConfigurationConstants.TEMPLATE_SETS_FOLDER)) {
	return false;
	}
	return true;
	}

I would suggest implementing the new check right before registerPlugins():

cobigen/cobigen-cli/cli/src/main/java/com/devonfw/cobigen/cli/utils/CobiGenUtils.java

Lines 47 to 63 in 27dced6

	/**
	* Registers CobiGen plug-ins and instantiates CobiGen
	*
	* @param templatesProject the templates project or jar
	* @param allowMonolithicConfiguration ignores deprecated monolithic template folder structure and if found does not
	* throw a DeprecatedMonolithicConfigurationException
	* @return object of CobiGen
	*/
	public static CobiGen initializeCobiGen(Path templatesProject, boolean allowMonolithicConfiguration) {
	registerPlugins();
	if (templatesProject != null) {
	return CobiGenFactory.create(templatesProject.toUri(), allowMonolithicConfiguration);
	} else {
	return CobiGenFactory.create(allowMonolithicConfiguration);
	}
	}