Typewriter can now support properties to be specified from the CLI and used in the templates. This option should only be used when:

• We can't update target metadata either by having workload teams fix their metadata, or by alteration with the metadata preprocessor.
• We can't make a fix in the templates or template logic by themselves.
• We need to inject control data at runtime.

The specified properties can be accessed from the templates. We needed this for beta PHP file generation since it uses a different namespace.

The attached file demonstrates the file generated from the test case where it injects a custom namespace.
Entity.txt

Change summary

• Updated the readme with information on the new command line option.
• Updated the PHP model templates to access the property bag and inject a beta namespace if applicable.
• Updated the ConfigurationService to accept the optional property bag and to update the templateWriterSettings in case we are running tests that target multiple languages in the same test suite. This last part is necessary since we are dealing with a lot of static members.
• Updated the TemplateProcessor to always provide a new T4 host. This is required as we need to update the host so that the appropriate language specific *CodeWriter.cs is used in the template processor and accessed from the templates.
• Updated tests and test metadata.