ci: enable caching of github actions and use of uv

* standardize python setup and ensure caching of dependencies

.github/workflows/help-in-readme.yml

@@ -7,6 +7,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - name: Verify that README contains output of darker --help
         run: uvx --from '.[flynt,isort]' darker --verify-readme

.github/workflows/isort.yml

@@ -11,7 +11,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: '3.x'
+          cache: 'pip'
       - run: pip install 'isort>=5.0.1'
       - uses: akaihola/lint-action@master
         with:

.github/workflows/mypy.yml

@@ -9,11 +9,16 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Install uv
-        uses: astral-sh/setup-uv@v3
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: '3.x'
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - run: |
           uv pip install --system -U \
             black \

.github/workflows/pylint.yml

@@ -9,11 +9,16 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Install uv
-        uses: astral-sh/setup-uv@v3
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: '3.x'
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - name: Install dependencies for running Pylint
         run: |
           uv pip install --system -U \

.github/workflows/python-package.yml

@@ -20,9 +20,16 @@ jobs:
       wheel-path: ${{ steps.get-darker-version.outputs.wheel-path }}
     steps:
       - uses: actions/checkout@v4
-      - name: Install uv
-        uses: astral-sh/setup-uv@v3
       - uses: actions/setup-python@v5
+        with:
+          python-version: '3.x' 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - name: Build wheel distribution
         run: uv build --wheel
       - name: Upload wheel for other jobs

.github/workflows/pyupgrade.yml

@@ -11,9 +11,16 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Install uv
-        uses: astral-sh/setup-uv@v3
       - uses: actions/setup-python@v5
+        with:
+          python-version: '3.x' 
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - name: Ensure modern Python style using pyupgrade
         run: |
           uvx \

.github/workflows/safety.yml

@@ -9,9 +9,14 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Install uv
-        uses: astral-sh/setup-uv@v3
       - uses: actions/setup-python@v5
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - run: uvx --from pip-tools pip-compile setup.cfg
       - name: Check dependencies for known security vulnerabilities using Safety
         run: uvx safety check --file requirements.txt

.github/workflows/test-bump-version.yml

@@ -9,9 +9,14 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Install uv
-        uses: astral-sh/setup-uv@v3
       - uses: actions/setup-python@v5
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
 
       - name: Make sure that `darkgray_bump_version` still finds all version strings
               and that there's a future milestone on GitHub Issues.

.github/workflows/test-future.yml

@@ -15,24 +15,27 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: 'master'
           fetch-depth: 0
       - uses: actions/setup-python@v5
         with:
           python-version: '3.x'
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          enable-cache: true
+          cache-dependency-glob: |
+            **/setup.cfg
+            **/pyproject.toml
       - name: Install dependencies
         run: |
-          # strict dependency resolution added in pip 20.3
-          # CVE-2021-3572 fixed in pip 21.1
-          python -m pip install --upgrade 'pip>=21.1'
-          pip install \
+          uv pip install \
             --constraint=constraints-future.txt \
             --upgrade \
-            --upgrade-strategy=eager \
             -e '.[test]'
+          uv python install
       - name: Test with pytest
         run: |
-          pytest
+          uv run pytest
       - name: Note a possible Black incompatibility and required actions
         if: failure()
         shell: python

CHANGES.rst

@@ -5,6 +5,7 @@ These features will be included in the next release:
 
 Added
 -----
+- CI workflow, enable caching of packages via uv across all actions
 - New exit codes 2 for file not found, 3 for invalid command line arguments, 4 for
   missing dependencies and 123 for unknown failures.
 - Display exit code in parentheses after error message.