Set modern-installation config option to false

As of Poetry v1.4.1, packages were required to use modern installation (see: python-poetry/poetry#7686). This is potentially problematic when relying on older versions of packages and for packages who are still using non-modern installers. This commit adds an additional step to disable that modern-installation requirement, which should get the workflow working again.
kaitj · Mar 31, 2023 · fae7b0a · fae7b0a
1 parent fc7f725
commit fae7b0a
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/.github/workflows/python-testing.yml b/.github/workflows/python-testing.yml
@@ -33,10 +33,13 @@ jobs:
       #  -----  install & configure poetry  -----
       #----------------------------------------------
       - name: Install Poetry
-        uses: snok/install-poetry@v1
-        with:
+      - uses: snok/install-poetry@v1
+      - with:
           virtualenvs-create: true
           virtualenvs-in-project: true
+      - run: |
+          poetry config installer.modern-installation false
+      #----------------------------------------------
       #----------------------------------------------
       #       load cached venv if cache exists
       #----------------------------------------------
@@ -93,10 +96,12 @@ jobs:
     #  -----  install & configure poetry  -----
     #----------------------------------------------
     - name: Install Poetry
-      uses: snok/install-poetry@v1
-      with:
+    - uses: snok/install-poetry@v1
+    - with:
         virtualenvs-create: true
         virtualenvs-in-project: true
+    - run: |
+        poetry config installer.modern-installation false
     #----------------------------------------------
     #       load cached venv if cache exists
     #----------------------------------------------