CI: Add musl+gcc to regression test workflow (#6)

* CI: move regression test to a reuseable workflow

* checkout is required to access reuseable workflow

* change position of "uses"

* regression test as reuseable action

* specify shell in composite action

* show gcc and ldd versions in action

* add CI workflow for musl+gcc

* add bash

* install python in alpine

* move setup-python out of the reuseable action

* use Python venv

* try to set up Python environment in bash

* run pip with venv

* What happens when pip runs in a different step?

* use pipx

* remove upgrade of pip

* let pip break the system packages

* install git

* make sure ldd --version call always exists with exitcode 0

* parameterize artifact name

* parameterize artifact name without input

* revert back to using input

* fix string concatenation

* revert back to explicit artifact names

.github/actions/regression_tests/action.yml

@@ -0,0 +1,37 @@
+name: Regression tests
+
+inputs:
+  artifact-name:
+    description: 'Name of the uploaded artifact'
+    required: false
+    default: 'regression-test-results'
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install SDF-pipeline
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install git+https://github.com/TUCAN-nest/SDF-pipeline.git
+      shell: bash
+
+    - name: Show gcc version
+      run: |
+        gcc --version
+      shell: bash
+
+    - name: Show ldd version
+      run: |
+        ldd --version || true
+      shell: bash
+
+    - name: Run regression tests
+      run: python -m INCHI-1-TEST.run_regression_tests ci
+      shell: bash
+
+    - name: Upload regression test results
+      if: '!cancelled()'
+      uses: actions/upload-artifact@v3
+      with:
+        name: ${{ inputs.artifact-name }}
+        path: ./INCHI-1-TEST/data/ci/*_regression_test.log

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  test:
+  test_glibc_gcc:
     runs-on: ubuntu-latest
     container: gcc:latest
 
@@ -17,19 +17,29 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: '3.11'
+      - uses: ./.github/actions/regression_tests
+        with:
+          artifact-name: regression-test-results_glibc_gcc
 
-      - name: Install SDF-pipeline
-        run: |
-          python -m pip install --upgrade pip
-          python -m pip install git+https://github.com/TUCAN-nest/SDF-pipeline.git
-
-      - name: Run regression tests
-        run: python -m INCHI-1-TEST.run_regression_tests ci
-        shell: bash
+  test_musl_gcc:
+    runs-on: ubuntu-latest
+    container: alpine:latest
 
-      - name: Upload regression test results
-        if: '!cancelled()'
-        uses: actions/upload-artifact@v3
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install build and test environment
+        run: |
+          apk add bash git musl-dev gcc make python3 py-pip
+      - name: Show Python version
+        run: |
+          python --version
+      - name: Configure pip to break system packages
+        run: |
+          mkdir -p ~/.config/pip
+          cat <<EOT >> ~/.config/pip/pip.conf
+          [global]
+          break-system-packages = true
+          EOT
+      - uses: ./.github/actions/regression_tests
         with:
-          name: regression-test-results
-          path: ./INCHI-1-TEST/data/ci/*_regression_test.log
+          artifact-name: regression-test-results_musl_gcc