Migrate build-test-package GitHub Action configuration into a composite action

[thewtex]

Migrate the .github/workflows/build-test-package.yml configuration into the relatively recently added composite GitHub Action.

A repository has been created for this action.

This will prevent the need to copy the yaml configuration to remote modules, enable remote modules to always get the latest version of the script if they use master of the action or used a specific tagged version.

[tbirdso]

Hi @thewtex , are we trying to support modules with extra dependencies, such as ITKUltrasound? Or should modules with any extra dependencies be expected to continue to fork the build-test-package.yml configuration?

[thewtex]

@tbirdso let's start with no extra dependencies, then see if we can add extra dependency support if possible! 🚀 🌔 🌠

[tbirdso]

Hi @thewtex , per discussion in InsightSoftwareConsortium/ITKRemoteModuleBuildTestPackageAction#1 my understanding is that 1) Github requires one repository per composite action and 2) a composite action runs in sequence and does not support multiple jobs.

What are your thoughts on this path forward:

• Retain a small build-test-package.yml actions file in the cookiecutter template to define cxx jobs and OS matrices, call composite actions, and publish to PyPI;
• Define a separate repo / action such as ITKRemotePythonBuildAction to handle Python build, test, packaging.

[dzenanz]

Since we have many remote modules, maybe it makes sense to have 3 test actions (one per platform) in addition to the 1 package action which you propose. That will make maintenance easier and simpler.

[blowekamp]

There seems to be some limitations with composite actions that make me wonder if they are the best option. I have created reusable step in Azure, but not GHA. My initial thoughts would be to create reusable steps that can be better customized by the package. But there is the question of how much customization is needed with the module.

1. Github requires one repository per composite action

In this documentation I see the following example:

name: Call a reusable workflow

on:
  pull_request:
    branches:
      - main

jobs:
  call-workflow:
    uses: octo-org/example-repo/.github/workflows/workflow-A.yml@v1

  call-workflow-passing-data:
    uses: octo-org/example-repo/.github/workflows/workflow-B.yml@main
    with:
      username: mona
    secrets:
      token: ${{ secrets.TOKEN }}

Isn't that multiple workflows in on repo?

[tbirdso]

Hi @blowekamp, thanks for the feedback.

Isn't that multiple workflows in on repo?

Github Actions defines both "composite actions" and "reusable workflows", the former is what we've implemented so far and has the requirement of one per repo. I've found conflicting discussion over the advantages of each one, but the reusable workflow documentation you've pointed to does show multiple reusable workflows in one repo. I've seen hints but no clear answers on whether reusable workflows can be consumed between different organizations' repos.

I will test out adding a reusable workflow in ITKRemoteModuleBuildTestPackageAction to determine whether that will meet our needs without creating a separate composite action for Python builds.

EDIT: Access across organizations looks promising: https://docs.github.com/en/actions/using-workflows/reusing-workflows#access-to-reusable-workflows

[tbirdso]

Roadmap to closing this issue:

1. Review and merge reusable pipelines for ITK remote module CI: ENH: Add ITK C++ and Python CI Reusable Workflows ITKRemoteModuleBuildTestPackageAction#3
2. Tag ITKRemoteModuleBuildTestPackageAction repo
3. Replace ITKModuleTemplate cookiecutter CI workflow implementation with a reference to reusable pipelines
4. Replace CI workflow implementations in most ITK remote module repos to reference the reusable workflows. Not currently applicable for remote modules that require custom CMake arguments to build or have dependencies other than ITK that are not fetched as part of the module build command (i.e. superbuilt).

[dzenanz]

@thewtex I think we can close this issue now?