ci: Speed up pip install by caching deps install output

.github/workflows/build_lint.yml

@@ -50,12 +50,30 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
+    - if: ${{ runner.os == 'Windows' }}
+      # This is needed so that restoring cache on Windows is fast.
+      # See until https://github.com/actions/cache/issues/752 is resolved.
+      name: Use GNU tar
+      shell: cmd
+      run: |
+        echo "Adding GNU tar to PATH"
+        echo C:\Program Files\Git\usr\bin>>"%GITHUB_PATH%"
     - uses: actions/cache@v3
       with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('Pipfile.lock') }}
+        path: ${{ env.pythonLocation }}
+        key: ${{ runner.os }}-pip-${{ env.pythonLocation }}-${{ hashFiles('setup.py') }}
     - name: Install dependencies
-      run: pip install wheel && pip install .[dev]
+      # Only if the cache misses
+      # Based on https://github.com/pypa/pip/issues/8049#issuecomment-633845028
+      # read_requirements.py should be removed once
+      # https://github.com/pypa/pip/issues/11440 is resolved.
+      if: steps.cache.outputs.cache-hit != 'true'
+      run: |
+        pip install toml
+        python tests/read_requirements.py > requirements.txt
+        pip install -r requirements.txt
+    - name: Install Mesa
+      run: pip install --no-deps .
     - name: Test with pytest
       run: pytest --cov=mesa tests/ --cov-report=xml
     - if: matrix.os == 'ubuntu'

tests/read_requirements.py

@@ -0,0 +1,8 @@
+import toml
+
+# This file reads the pyproject.toml and prints out the
+# dependencies and dev dependencies.
+# It is located in tests/ folder so as not to pollute the root repo.
+c = toml.load("pyproject.toml")
+print("\n".join(c["project"]["dependencies"]))
+print("\n".join(c["project"]["optional-dependencies"]["dev"]))