Split build-python-package to its own action

Author: mx-moth

.github/actions/build-python-package/action.yaml

@@ -0,0 +1,36 @@
+name: Build emsarray Python package
+description: Build the emsarray Python package in both tarball and wheel formats.
+inputs:
+  python-version:
+    description: Python version to use.
+    required: true
+  artifact-name:
+    description: Name of the uploaded artifact
+    required: false
+    default: "Python package"
+
+outputs:
+  artifact-name:
+    description: Name of the uploaded artifact
+    value: ${{ inputs.artifact-name }}
+
+runs:
+  using: composite
+
+  steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
+      with:
+        python-version: ${{ inputs.python-version }}
+        cache: 'pip'
+
+    - name: Build python package
+      shell: bash -l {0}
+      run: |
+        pip install build
+        python3 -m build
+
+    - uses: actions/upload-artifact@v3
+      with:
+        name: ${{ inputs.artifact-name }}
+        path: dist

.github/actions/environment/action.yaml

@@ -4,6 +4,10 @@ inputs:
   python-version:
     description: Python version to install. Used as a Conda version constraint.
     required: true
+  package-artifact-name:
+    description: Name of the emsarray Python package artifact
+    required: false
+    default: "Python package"
 
 runs:
   using: composite
@@ -13,26 +17,36 @@ runs:
     - uses: actions/setup-python@v4
       with:
         cache: 'pip'
+        cache-dependency-path: |
+          continuous-integration/requirements.txt
+          continuous-integration/environment.yaml
+          setup.cfg
         python-version: ${{ inputs.python-version }}
 
-    - name: Fetch Python package
+    - name: Fetch built emsarray package
       uses: actions/download-artifact@v3
       with:
-        name: "Python package"
+        name: ${{ inputs.python-artifact-name }}
         path: "dist/"
 
+    - name: Cache conda packages
+      uses: actions/cache@v2
+      with:
+        path: ~/conda_pkgs_dir
+        key:
+          ${{ runner.os }}-conda-${{
+          hashFiles('continuous-integration/environment.yaml') }}
+
     - name: Install base Conda environment
-      uses: mamba-org/provision-with-micromamba@main
+      uses: conda-incubator/setup-miniconda@v2
       with:
-        cache-downloads: true
-        cache-env: false
-        channels: conda-forge
         environment-file: continuous-integration/environment.yaml
-        environment-name: continuous-integration
-        extra-specs: |
-          python=${{ inputs.python-version }}
-          wheel
-          pip
+        python-version: ${{ inputs.python-version }}
+        channels: conda-forge
+    - shell: bash -l {0}
+      run: |
+        conda install -c conda-forge wheel
+
 
     - name: Install Python packages
       shell: bash -l {0}

.github/workflows/ci.yaml

@@ -11,29 +11,20 @@ on:
 
   workflow_dispatch:
 
+env:
+  python-version: "3.11"
+
 jobs:
   build:
     runs-on: ubuntu-latest
-    env:
-      python_version: "3.11"
+    outputs:
+      artifact-name: ${{ steps.build.outputs.artifact-name }}
     steps:
       - uses: actions/checkout@v3
-
-      - uses: actions/setup-python@v4
+      - uses: ./.github/actions/build-python-package
+        id: build
         with:
-          python-version: ${{ env.python_version }}
-          cache: 'pip'
-
-      - name: Build python package
-        shell: bash -l {0}
-        run: |
-          pip install build
-          python3 -m build
-
-      - uses: actions/upload-artifact@v3
-        with:
-          name: "Python package"
-          path: dist
+          python-version: ${{ env.python-version }}
 
   test:
     runs-on: ubuntu-latest
@@ -50,6 +41,7 @@ jobs:
       - uses: ./.github/actions/environment
         with:
           python-version: ${{ matrix.python-version }}
+          package-artifact-name: ${{ needs.build.outputs.artifact-name }}
 
       - name: Run tests
         shell: bash -l {0}
@@ -80,20 +72,18 @@ jobs:
       run:
         shell: bash -l {0}
 
-    env:
-      python_version: "3.11"
-
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/environment
         with:
-          python-version: ${{ env.python_version }}
+          python-version: ${{ env.python-version }}
+          package-artifact-name: ${{ needs.build.outputs.artifact-name }}
 
       - name: 'mypy cache'
         uses: actions/cache@v3
         with:
           path: '.mypy_cache'
-          key: mypy-${{ runner.os }}-py${{ env.python_version }}-${{ hashFiles('requirements.txt') }}
+          key: mypy-${{ runner.os }}-py${{ env.python-version }}-${{ hashFiles('requirements.txt') }}
 
       - run: flake8 src/ tests/
       - run: isort --diff --check-only src/ tests/
@@ -112,7 +102,8 @@ jobs:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/environment
         with:
-          python-version: "3.11"
+          python-version: ${{ env.python-version }}
+          package-artifact-name: ${{ needs.build.outputs.artifact-name }}
 
       - run: |
           cd docs/
@@ -126,14 +117,14 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     timeout-minutes: 5
-    needs: ['test', 'lint', 'docs']
+    needs: ['build', 'test', 'lint', 'docs']
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
 
     steps:
       - name: Fetch Python package
         uses: actions/download-artifact@v3
         with:
-          name: "Python package"
+          name: ${{ needs.build.outputs.artifact-name }}
           path: "dist"
 
       - name: "Check tag matches version"