feat(images): add a container image for running ptypy workflows

.github/workflows/_ptypy-workflows.yml

@@ -0,0 +1,61 @@
+on:
+  workflow_call:
+    inputs:
+      publish:
+        type: boolean
+        description: If true, pushes image to container registry
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Docker Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and export to Docker local cache
+        uses: docker/build-push-action@v6
+        env:
+          DOCKER_BUILD_RECORD_UPLOAD: false
+        with:
+          context: images/ptypy_workflows
+          file: images/ptypy_workflows/Dockerfile
+          # Need load and tags so we can test it below
+          load: true
+          tags: tag_for_testing
+
+      - name: Create tags for publishing image
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=ref,event=tag
+            type=raw,value=latest
+
+      - name: Push cached image to container registry
+        if: inputs.publish && github.ref_type == 'tag'
+        uses: docker/build-push-action@v6
+        env:
+          DOCKER_BUILD_RECORD_UPLOAD: false
+        # This does not build the image again, it will find the image in the
+        # Docker cache and publish it
+        with:
+          context: images/ptypy_workflows
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/ci.yml

@@ -5,11 +5,10 @@ on:
     branches:
       - main
     tags:
-      - '*'
+      - "*"
   pull_request:
 
 jobs:
-
   lint:
     uses: ./.github/workflows/_tox.yml
     with:
@@ -36,16 +35,22 @@ jobs:
       contents: read
       packages: write
 
+  ptypy-workflows:
+    uses: ./.github/workflows/_ptypy-workflows.yml
+    permissions:
+      contents: read
+      packages: write
+
   dist:
     uses: ./.github/workflows/_dist.yml
-  
+
   pypi:
     needs: [dist, test]
     if: github.ref_type == 'tag'
     uses: ./.github/workflows/_pypi.yml
     permissions:
       id-token: write
-  
+
   release:
     needs: [dist, test]
     if: github.ref_type == 'tag'

images/ptypy_workflows/Dockerfile

@@ -0,0 +1,24 @@
+FROM quay.io/condaforge/miniforge3 AS build
+
+COPY environment.yaml .
+RUN conda env create -f environment.yaml && \
+  conda install -c conda-forge conda-pack && \
+  conda clean --all --yes && \
+  conda-pack -n ptypy_workflow -o /tmp/env.tar && \
+  mkdir /venv && cd /venv && tar xf /tmp/env.tar && \
+  rm /tmp/env.tar && \
+  rm -rf /opt/conda/pkgs
+
+RUN /venv/bin/conda-unpack
+
+# Install system dependencies and clean up
+RUN apt-get update && \
+  apt-get install -y curl unzip && \
+  rm -rf /var/lib/apt/lists/*
+
+
+FROM ubuntu:resolute AS runtime
+
+COPY --from=build /venv /venv
+
+ENV PATH="/venv/bin:$PATH"

images/ptypy_workflows/environment.yaml

@@ -0,0 +1,21 @@
+name: ptypy_workflow
+channels:
+  - conda-forge
+dependencies:
+  - python=3.14
+  - numpy
+  - scipy
+  - pyzmq
+  - mpi4py
+  - packaging
+  - pillow
+  - pyfftw
+  - pyyaml
+  - matplotlib
+  - jupyter
+  - nbconvert
+  - papermill
+  - h5py
+  - pip
+  - pip:
+      - git+https://github.com/ptycho/ptypy@master