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Dataplane Codegen Quick Start

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Laurent Mazuel edited this page Dec 10, 2021 · 74 revisions

Getting Started - Generate SDK With Dataplane Codegen

Prerequisites

  • Python 3.6 or later is required

  • Nodejs 14.x.x or later is required

  • create virtual environment

    python -m venv venv-dev
.\venv-dev\Scripts\Activate.ps1

  • prepare SDK repo if needed

    git clone https://github.com/Azure/azure-sdk-for-python.git

  • prepare autorest

    npm install -g autorest

Project folder and package name

Before we start, we probably should get to know the project folder for SDK repo. Normally, the folder structure would be something like:

  • sdk/{servicename}/azure-{servicename}-{modulename}: ${PROJECT_ROOT} folder, there are also some other files(like setup.py, README.md, etc) which are necessary for a complete package.
  • ${PROJECT_ROOT}/azure/{servicename}/{modulename} : folder where generated code is.
  • ${PROJECT_ROOT} /swagger: folder of configuration file which is used to generate SDK code with autorest
  • ${PROJECT_ROOT}/tests: folder of test files
  • ${PROJECT_ROOT}/samples: folder of sample files
  • azure-{servicename}-{modulename}: package name. Usually, package name is same with part of ${PROJECT_ROOT} folder. After release, you can find it in pypi. For example: you can find azure-messaging-webpubsubservice in pypi.

How to generate SDK code with Dataplane Codegen

We are working on to automatically generate everything right now, but currently we still need some manual work to get a releasable package. Here're the steps of how to get the package.

  1. Create a README.md file under ${PROJECT_ROOT}/swagger We are using autorest to generate the code, but there's a lot of command options and in order to make the regenerate process easier in the cases of refresh the rest api input or change the code generator version. So it is better to document the command parameters. Here's an example of the README.md

    # Azure Purview for Python

> see https://aka.ms/autorest

### Settings

```yaml
input-file: https://raw.githubusercontent.com/Azure/azure-rest-api-specs/main/specification/webpubsub/data-plane/WebPubSub/stable/2021-10-01/webpubsub.json
output-folder: ../azure/messaging/webpubsubservice
namespace: azure.messaging.webpubsubservice
package-name: azure-messaging-webpubsubservice
license-header: MICROSOFT_MIT_NO_VERSION
clear-output-folder: true
no-namespace-folders: true
python: true
title: WebPubSubServiceClient
version-tolerant: true
package-version: 1.0.0b1
add-credential: true
credential-scopes: https://webpubsub.azure.com/.default
```

    There are some configuration in the template and you could reference autorest/flags to get more info. We need to replace the value in package-name, title, input-file, package-version, credential-scopes, output-folder into your own service's package-name, titleetc.

  2. Run autorest to generate the SDK

    Now you can run this command in swagger folder you just created.

autorest --version=latest --python --use=@autorest/python@latest  README.md

  • Add necessary files under ${PROJECT_ROOT}

    For a complete package, there are some other files you need to add:

    CHANGELOG.md: introduce the release history and important change for each release.

    LICENSE: license file

    README.md: import files which introduce what the service is and how to use this package

    dev_requirements.txt: claims some package which is needed to run test

    sdk_packaging.toml: configuration file to decide which file will be included in package.

    setup.cfg: necessary file but usually needn't change it.

    setup.py: most important files about dependency and supported version for Python.

    Here is template files, and you at least need to edit item (like {{pakcage_name}}, {{package_pprint_name}}, etc) in CHANGELOG.md, README.md, setup.py, sdk_packaging.toml according to specific info of your own service. It is easier to understand how to edit the files with reference existing service: webpubsub

How to write test

Here is the Dataplane Codegen Quick Start for Test about how to write and run test.

How to write sample

sample can make customers more easy and fast to use the package. It could be simple which just shows how to use the package; Or it could be complexed scenario example for customers to create their own service quicky.

sample is very flexible but it should be an executive and easy to run and understand.

You could add sample under ${PROJECT_ROOT}/swagger. It is better to contain Readme.md(example) which introduces simply how to run the sample.

If you want to run sample with dev mode, just run pip install -e .(detail doc) under ${PROJECT_ROOT} instead of pip install azure.myservice.

How to create package

If you want to create a private package, go to ${PROJECT_ROOT} folder and run :

python setup.py bdist_wheel

Create/Update the ci.yaml

Now, if everything looks good to you, you can submit a PR in azure-sdk-for-python repo with all the changes you made above. Before you do that, you need to add/update the ci.yml file. Depends on whether there's already one in sdk/{servicename} folder.

If there's no such file then you can add the following template.

# DO NOT EDIT THIS FILE
# This file is generated automatically and any changes will be lost.

trigger:
  branches:
    include:
    - main
    - hotfix/*
    - release/*
    - restapi*
  paths:
    include:
    - sdk/{servicename}/

pr:
  branches:
    include:
    - main
    - feature/*
    - hotfix/*
    - release/*
    - restapi*
  paths:
    include:
    - sdk/{servicename}/

extends:
  template: ../../eng/pipelines/templates/stages/archetype-sdk-client.yml
  parameters:
    ServiceDirectory: {servicename}
    Artifacts:
    - name: azure-mgmt-webpubsub
      safeName: azuremgmtwebpubsub
    - name: azure-messaging-webpubsubservice
      safeName: azuremessagingwebpubsubservice

Please change the {servicename}, Artifacts name and safeName into yours.

If there's already a ci.yml file in your project path. then the only thing you need to do is to add the Artifacts name and safeName of yours into that ci.yml.

Usually, Artifacts name is same with package name and remove - in Artifacts name to get safeName. Example: webpubwub, purview

Next steps

It is a little troublesome when you generate code and add files manually for total new package. So just have a try to use tools to create LLC code very quickly. Here is the guidance: Dataplane-Codegen-Quick-Start-with-tools.

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