Restructure as a Python package

.cruft.json

@@ -0,0 +1,31 @@
+{
+  "template": "https://github.com/OpenAstronomy/packaging-guide",
+  "commit": "ad6da17e1d8fd96456566abed30b510bf8b5f8c8",
+  "checkout": null,
+  "context": {
+    "cookiecutter": {
+      "package_name": "ebtelplusplus",
+      "module_name": "ebtelplusplus",
+      "short_description": "Zero-dimensional hydrodynamics of coronal loops",
+      "author_name": "Will Barnes",
+      "author_email": "[email protected]",
+      "project_url": "https://github.com/rice-solar-physics/ebtelplusplus",
+      "license": "GNU GPL v3+",
+      "minimum_python_version": "3.10",
+      "use_compiled_extensions": "y",
+      "enable_dynamic_dev_versions": "y",
+      "include_example_code": "n",
+      "include_cruft_update_github_workflow": "y",
+      "_sphinx_theme": "alabaster",
+      "_parent_project": "",
+      "_install_requires": "",
+      "_copy_without_render": [
+        "docs/_templates",
+        "docs/_static",
+        ".github/workflows/sub_package_update.yml"
+      ],
+      "_template": "https://github.com/OpenAstronomy/packaging-guide"
+    }
+  },
+  "directory": null
+}

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - 'main'
+      - '*.*'
+    tags:
+      - 'v*'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  core:
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
+    with:
+      toxdeps: tox-pypi-filter
+      envs: |
+        - linux: py312
+          libraries:
+            apt:
+              - libboost-all-dev
+      coverage: 'codecov'
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
+  tests:
+    needs: [core]
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
+    with:
+      toxdeps: tox-pypi-filter
+      envs: |
+        - windows: py310
+          libraries:
+            choco:
+              - boost-msvc-14.2
+        - macos: py311
+          libraries:
+            brew:
+              - boost
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
+  docs:
+    needs: [tests]
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
+    with:
+      toxdeps: tox-pypi-filter
+      envs: |
+        - linux: build_docs-gallery
+          python-version: '3.12'
+          libraries:
+            apt:
+              - libboost-all-dev
+
+
+  publish:
+    # Build wheels when pushing to any branch except main
+    # publish.yml will only publish if tagged ^v.*
+    if: |
+      (
+        github.event_name != 'pull_request' && (
+          github.ref_name != 'main' ||
+          github.event_name == 'workflow_dispatch'
+        )
+      ) || (
+        github.event_name == 'pull_request' &&
+        contains(github.event.pull_request.labels.*.name, 'Run publish')
+      )
+    needs: [tests]
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish.yml@main
+    with:
+      test_extras: 'test'
+      test_command: 'pytest -p no:warnings --doctest-rst --pyargs ebtelplusplus'
+      sdist: false
+      env: |
+        CIBW_BEFORE_BUILD_LINUX: yum install -y boost-devel
+        CIBW_BEFORE_BUILD_MACOS: brew install boost
+        CIBW_BEFORE_BUILD_WINDOWS: choco install -y boost-msvc-14.2
+        MACOSX_DEPLOYMENT_TARGET: 10.15
+      targets: |
+        - cp3{10,11,12}-macosx_arm64
+        - cp3{10,11,12}-macosx_x86_64
+        - cp3{10,11,12}-manylinux_aarch64
+        - cp3{10,11,12}-manylinux_x86_64
+        - cp3{10,11,12}-win_amd64
+    secrets:
+      pypi_token: ${{ secrets.PYPI_TOKEN }}

.github/workflows/sub_package_update.yml

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+# This template is taken from the cruft example code, for further information please see:
+# https://cruft.github.io/cruft/#automating-updates-with-github-actions
+name: Automatic Update from package template
+permissions:
+    contents: write
+    pull-requests: write
+
+on:
+  # Allow manual runs through the web UI
+  workflow_dispatch:
+  schedule:
+    #        ┌───────── minute (0 - 59)
+    #        │ ┌───────── hour (0 - 23)
+    #        │ │ ┌───────── day of the month (1 - 31)
+    #        │ │ │ ┌───────── month (1 - 12 or JAN-DEC)
+    #        │ │ │ │ ┌───────── day of the week (0 - 6 or SUN-SAT)
+    - cron: '0 7 * * 1'  # Every Monday at 7am UTC
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        include:
+          - add-paths: .
+            body: apply the changes to this repo.
+            branch: cruft/update
+            commit-message: "Automatic package template update"
+            title: Updates from the package template
+          - add-paths: .cruft.json
+            body: reject these changes for this repo.
+            branch: cruft/reject
+            commit-message: "Reject this package template update"
+            title: Reject new updates from package template
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install Cruft
+        run: python -m pip install git+https://github.com/Cadair/cruft@patch-p1
+
+      - name: Check if update is available
+        continue-on-error: false
+        id: check
+        run: |
+          CHANGES=0
+          if [ -f .cruft.json ]; then
+            if ! cruft check; then
+              CHANGES=1
+            fi
+          else
+            echo "No .cruft.json file"
+          fi
+
+          echo "has_changes=$CHANGES" >> "$GITHUB_OUTPUT"
+
+      - name: Run update if available
+        if: steps.check.outputs.has_changes == '1'
+        run: |
+          git config --global user.email "${{ github.actor }}@users.noreply.github.com"
+          git config --global user.name "${{ github.actor }}"
+
+          cruft update --skip-apply-ask --refresh-private-variables
+          git restore --staged .
+
+      - name: Create pull request
+        if: steps.check.outputs.has_changes == '1'
+        uses: peter-evans/create-pull-request@v6
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          add-paths: ${{ matrix.add-paths }}
+          commit-message: ${{ matrix.commit-message }}
+          branch: ${{ matrix.branch }}
+          delete-branch: true
+          branch-suffix: timestamp
+          title: ${{ matrix.title }}
+          body: |
+            This is an autogenerated PR, which will ${{ matrix.body }}.
+            [Cruft](https://cruft.github.io/cruft/) has detected updates from the Package Template