Get the full repository history for versioning

.github/workflows/pythonpackage.yml

@@ -5,11 +5,14 @@ on:
     types: published
   push:
 
+# NOTE: These jobs *must* use actions/checkout@v1 for full history,
+# or run git fetch --prune --unshallow for versioning to work
 jobs:
   build-linux:
     runs-on: ubuntu-latest
     container: quay.io/pypa/manylinux2010_x86_64
     steps:
+    # The manylinux2010 container only works with actions/checkout@v1
     - uses: actions/checkout@v1
     - name: Create wheels
       run: |
@@ -25,6 +28,7 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v2
+    - run: git fetch --prune --unshallow
     - name: Setup macOS SDK
       if: runner.os == 'macOS'
       run: ./.github/workflows/setup-macos-10.9-sdk.sh
@@ -51,6 +55,7 @@ jobs:
             winarch: win32
     steps:
     - uses: actions/checkout@v2
+    - run: git fetch --prune --unshallow
     - name: Create wheels
       run: |
         source ./helics-pip/packaging_scripts/setup-Windows.sh "$(cat HELICS_VERSION)" "${{ matrix.winarch }}"
@@ -66,6 +71,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+    - run: git fetch --prune --unshallow
     - name: Build source distribution
       run: |
         HELICS_VERSION=$(cat HELICS_VERSION)