Have a packaging template library in autorest

[lmazuel]

Today, we have --basic-setup-py, and we want to be able to do more than that, with Jinja templating support. For instance, I want to integrate this in autorest:

https://github.com/Azure/azure-sdk-for-python/tree/main/tools/azure-sdk-tools/packaging_tools/templates

Autorest should include those basic templates:

• basic-setup-py
• azure-sdk-mgmt
• azure-sdk-dataplane

We could pass too a folder that contains a tempalte, following the basic structure and defining the keyword you are allowed to use.

Example of calls:
autorest --packaging-template=basic-setup-py
autorest --packaging-template=azure-sdk-mgmt
autorest --packaging-template=c:\git\azure-sdk-for-python\tools/azure-sdk-tools/packaging_tools/templates

For the later, we need to support some predefined variable like "package_pprint_name" where you can write in the Readme:

packaging-configuration:
    package_pprint_name: Azure Mgmt Compute
    package_name: azure-mgmt-compute

[msyyc]

as mgmt owner, it has matured pipeline to add basic files for new service. So I will do it for data-plan first.

[msyyc]

Hi @lmazuel How about writing scripts to add necessary files(setup.py,CHANGELOG.md, etc) instead of doing that in autorest. It can be more flexible. I am working it now and hope it could be applied in deviceupdate

[iscai-msft]

@msyyc my understanding is we don't want to force users to use outside scripts, i.e., do another step (and potentially take on another dependency), when we can fold this into autorest and add a flag.

For example, generating a multiapi sdk used to be a two step process: 1. You'd have to generate all of the api versions with autorest, then 2. You'd run a separate script in the azure-sdk-for-python repo. We found it's a better user experience to add the "generate a multiapi sdk" functionality into autorest

[msyyc]

Hi, I develop a script to help generate necessary files for new service and write quick-start doc to guide how to create or update LLC package. In the future, we could move those function to autorest.python if needed.
Azure/azure-sdk-for-python#21689