Migrating Azure pipelines to GHA workflows

[lamkina]

Purpose

This PR migrates our CI infrastructure from Azure pipelines to Github Actions workflows. This will target the SR runners instead of the runners provided by Azure.

This PR will remove the Azure pipelines templates.

Expected time until merged

1-2 days

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

[Copilot]

Pull request overview

This PR migrates CI infrastructure from Azure Pipelines to GitHub Actions workflows. The migration removes all Azure-specific templates and configurations while introducing equivalent GitHub Actions reusable workflows. A new combine-config.py script has been added at the repository root to support configuration merging for tools like pylint and isort.

Changes:

• Removed all Azure Pipeline templates and configuration files from the azure/ directory
• Added new GitHub Actions reusable workflows for build, test, formatting, and linting
• Created comprehensive documentation for GitHub Actions workflows in .github/workflows/README.md
• Updated existing workflows to use consistent Python 3.11 and improved configuration management

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
ruff.toml	Reformatted select array and added McCabe complexity configuration
combine-config.py	New script for merging INI-style configuration files with improved error handling
azure/fprettify.sh	Removed Azure-specific fprettify script
azure/combine-config.py	Removed Azure-specific config merge script
azure/clang-format.sh	Removed Azure-specific clang-format script
azure/azure_template.yaml	Removed Azure pipeline template
azure/azure_tapenade.yaml	Removed Azure Tapenade job template
azure/azure_style.yaml	Removed Azure style check job template
azure/azure_pypi.yaml	Removed Azure PyPI deployment template
azure/azure_build.yaml	Removed Azure build and test job template
azure/README.md	Removed Azure pipelines documentation
.github/workflows/tapenade.yaml	New GHA workflow for Tapenade checks
.github/workflows/pypi.yaml	Updated Python version to 3.11
.github/workflows/pylint.yaml	Enhanced with config merging and Python 3.11
.github/workflows/mypy.yaml	Updated to use only Python 3.11
.github/workflows/isort.yaml	Enhanced with config merging and Python 3.11
.github/workflows/fprettify.yaml	New GHA workflow for Fortran formatting
.github/workflows/format-and-lint.yaml	Enhanced with McCabe complexity option and Python 3.11
.github/workflows/clang_format.yaml	New GHA workflow for C/C++ formatting
.github/workflows/build.yaml	New GHA workflow for Docker-based build and test
.github/workflows/README.md	Comprehensive documentation for GHA workflows

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[lamkina]

Take a look at this splinetoolbox PR to see the testing for all of the workflow updates being made.

[sseraj]

Two of my previous comments have not been addressed. I also have some new comments

[lamkina]

Two of my previous comments have not been addressed. I also have some new comments

Which ones did I not address? Are they the fprettify and clang scripts or others?

[sseraj]

Which ones did I not address? Are they the fprettify and clang scripts or others?

I bumped the two comments above

[lamkina]

@eirikurj go ahead an merge this in the morning if you approve. If not, I'll address any additional comments first thing. Would like to get this one done tomorrow.

[lamkina]

I refactored the docker setup and docker cleanup steps into composite actions.

I tested them with the feature-migrate_azure2gha branch in the build and mypy workflows, then switched them back to main so they are ready to be merged.