Set pip to prefer binary wheels.

Author: domdfcoding

.github/workflows/python_ci.yml

@@ -67,6 +67,7 @@ jobs:
           python -m site
           python -m pip install --upgrade pip setuptools wheel
           python -m pip install --upgrade tox~=3.0 virtualenv!=20.16.0
+          pip config set global.prefer-binary true
 
       - name: "Run Tests for Python ${{ matrix.config.python-version }}"
         if: steps.setup-python.outcome == 'success'

.github/workflows/python_ci_linux.yml

@@ -69,6 +69,7 @@ jobs:
           python -m pip install --upgrade pip setuptools wheel
           python -m pip install --upgrade tox~=3.0 virtualenv!=20.16.0
           python -m pip install --upgrade coverage_pyver_pragma
+          pip config set global.prefer-binary true
 
       - name: "Run Tests for Python ${{ matrix.config.python-version }}"
         if: steps.setup-python.outcome == 'success'

.github/workflows/python_ci_macos.yml

@@ -67,6 +67,7 @@ jobs:
           python -m site
           python -m pip install --upgrade pip setuptools wheel
           python -m pip install --upgrade tox~=3.0 virtualenv!=20.16.0
+          pip config set global.prefer-binary true
 
       - name: "Run Tests for Python ${{ matrix.config.python-version }}"
         if: steps.setup-python.outcome == 'success'

repo_helper.yml

@@ -209,3 +209,15 @@ third_party_version_matrix:
     - 8.1
     - 8.2
 #    - latest
+
+# Prefery binary wheels for older versions over sdists for newer ones
+github_ci_requirements:
+ Linux:
+  post:
+   - pip config set global.prefer-binary true
+ Windows:
+  post:
+   - pip config set global.prefer-binary true
+ macOS:
+  post:
+   - pip config set global.prefer-binary true