#2: investigate general approach to define CI target platforms

ci/docker/generic-approach/configurations.yaml

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+# NOTE: This is an investigation about a more complex but more scalable way to difine th platforms to target in CI.
+# This file might be used as an input to scripts to
+# - generate dockerfile environment files (for nodes with type='docker-image') and being able to build and push images
+# - generate Github workflows yaml files stub (for nodes with type='github-runner')*
+# - generate Azure pipelines yaml files stub (for nodes with type='azure-runner')*
+# *In VT we have some specific stuff. We might want to add some compose logic with some generated pipeline stub and complementary
+# project-specific pipeline
+
+# THIS IS A LOT OF WORK BUT MIGHT BE VERY USEFUL
+
+globals:
+  AZURE_PIPELINES_DIR: ci/azure
+  GITHUB_PIPELINES_DIR: .github/workflows
+
+parameters:
+  python-common-packages: [nanobind, yaml]
+  conda-python[3.8-3.12]:
+    py3.8: [ python: 3.8, packages: "@python-common-packages"]
+    py3.9: [ python: 3.9, packages: "@python-common-packages" ]
+    py3.10: [ python: 3.10, packages: "@python-common-packages" ]
+    py3.11: [ python: 3.11, packages: "@python-common-packages" ]
+    py3.12: [ python: 3.12, packages: "@python-common-packages" ]
+
+configurations: 
+  ubuntu-22.04-gcc-11-vtk-9.2.2-py-3x-mpi:
+    type: docker-image
+    arch: amd64
+    base: ubuntu:22.04
+    compiler: { type: gnu, cc: gcc-11, cxx: gcc-11++ }
+    conda: "@conda-python[3.8-3.12]"
+    vtk: { version: '9.2.2' }
+    mpi: { dir: v5.0, version: '5.0.4' }
+
+  macos-12-clang-14-vtk-9.3.1:
+    type: github-runner
+    runs-on: macos-12,
+    compiler: { type: gnu, cc: clang-14, cxx: clang-14++ }
+    gcov: llvm-gcov,
+    python: ['3.8', '3.9', '3.10', '3.11', '3.12']
+    vtk: '9.3.1'
+    mpi: ~

ci/docker/generic-approach/ubuntu/amd64-ubuntu-gcc11.env

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+# Note: could be generated and used by docker compose
+# This file could be generated by a script reading configurations.yaml
+DOCKERFILE=ubuntu-cpp-base.dockerfile
+REPO=lifflander1/vt
+ARCH=amd64
+UBUNTU=22.04
+ULIMIT_CORE=0
+COMPILER=gcc-12
+HOST_COMPILER=gcc-12
+COMPILER_TYPE=gnu
+PROXY=
+TOKEN=

ci/docker/generic-approach/ubuntu/ubuntu-cpp-base.dockerfile

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+# Docker instructions to build an image with some arguments to specify compilers, python and VTK versions.
+# @see .github/workflows/pushbasedockerimage.yml
+
+ARG BASE_IMAGE=ubuntu:22.04
+
+# Base image & requirements
+FROM ${BASE_IMAGE} AS base
+
+# Arguments
+ARG VTK_VERSION=9.2.2
+ARG PYTHON_VERSIONS=3.8,3.9,3.10,3.11,3.12
+ARG CC=gcc-11
+ARG CXX=g++-11
+ARG GCOV=gcov-11
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Setup common tools and compiler
+RUN apt-get update -y -q && \
+  apt-get install -y -q --no-install-recommends \
+  ${CC} \
+  ${CXX} \
+  git \
+  xz-utils \
+  bzip2 \
+  zip \
+  gpg \
+  wget \
+  gpgconf \
+  software-properties-common \
+  libsigsegv2 \
+  libsigsegv-dev \
+  pkg-config \
+  zlib1g \
+  zlib1g-dev \
+  m4 \
+  gfortran-11 \
+  make \
+  cmake-data \
+  cmake \
+  pkg-config \
+  libncurses5-dev \
+  m4 \
+  perl \
+  curl \
+  xvfb \
+  lcov
+
+# Setup MESA (opengl)
+RUN bash /opt/scripts/setup_mesa.sh
+RUN xvfb-run bash -c "glxinfo | grep 'OpenGL version'"
+
+# Environment variables (conda path, python environments, compiler path, vtk)
+ENV CC=/usr/bin/$CC
+ENV CXX=/usr/bin/$CXX
+ENV GCOV=/usr/bin/$GCOV
+ENV CONDA_PATH=/opt/conda
+ENV VTK_DIR=/opt/build/vtk
+
+# Setup conda with python environments
+RUN bash /opt/scripts/setup_conda.sh ${PYTHON_VERSIONS}
+
+# Setup VTK
+RUN VTK_VERSION=${VTK_VERSION} \
+  VTK_DIR=${VTK_DIR} \
+  VTK_SRC_DIR=/opt/src/vtk \
+  bash /opt/scripts/setup_vtk.sh
+
+# Clean apt
+RUN apt-get clean && rm -rf /var/lib/apt/lists/*
+
+RUN echo "Base creation success"