Cache pip downloads in CI (#9192)

.github/workflows/daily.yml

@@ -38,8 +38,8 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Update pip
-        run: python -m pip install -U pip
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - name: Install dependencies
         run: pip install $(grep tomli== requirements-tests.txt) $(grep mypy== requirements-tests.txt)
       - name: Run stubtest
@@ -59,6 +59,11 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.9"
+          cache: pip
+          cache-dependency-path: |
+            requirements-tests.txt
+            stubs/**/@tests/requirements-stubtest.txt
+            stubs/**/METADATA.toml
       - name: Install dependencies
         run: pip install -r requirements-tests.txt
       - name: Run stubtest
@@ -90,6 +95,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: stub_uploader/requirements.txt
       - name: Run tests
         run: |
           cd stub_uploader

.github/workflows/stubsabot.yml

@@ -24,6 +24,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - name: git config
         run: |
           git config --global user.name stubsabot

.github/workflows/stubtest_stdlib.yml

@@ -39,8 +39,8 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Update pip
-        run: python -m pip install -U pip
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - name: Install dependencies
         run: pip install $(grep mypy== requirements-tests.txt)
       - name: Run stubtest

.github/workflows/stubtest_third_party.yml

@@ -35,6 +35,11 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.9"
+          cache: pip
+          cache-dependency-path: |
+            requirements-tests.txt
+            stubs/**/@tests/requirements-stubtest.txt
+            stubs/**/METADATA.toml
       - name: Install dependencies
         run: pip install -r requirements-tests.txt
       - name: Run stubtest

.github/workflows/tests.yml

@@ -29,6 +29,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - run: pip install -r requirements-tests.txt
       - run: ./tests/check_consistent.py
 
@@ -50,6 +52,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - run: pip install -r requirements-tests.txt
       - run: flake8
 
@@ -61,6 +65,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - run: pip install -r requirements-tests.txt
       - run: ./tests/pytype_test.py --print-stderr
 
@@ -77,6 +83,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - run: pip install -r requirements-tests.txt
       - run: python ./tests/mypy_test.py --platform=${{ matrix.platform }} --python-version=${{ matrix.python-version }}
 
@@ -88,6 +96,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - run: pip install -r requirements-tests.txt
       - run: python ./tests/regr_test.py --all
 
@@ -141,6 +151,8 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
+          cache: pip
+          cache-dependency-path: stub_uploader/requirements.txt
       - name: Run tests
         run: |
           cd stub_uploader

.github/workflows/typecheck_typeshed_code.yml

@@ -34,6 +34,8 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: "3.9"
+          cache: pip
+          cache-dependency-path: requirements-tests.txt
       - run: pip install -r requirements-tests.txt
       - run: python ./tests/typecheck_typeshed.py --platform=${{ matrix.platform }}