chore: share gh actions setup across jobs

Author: damassi

.github/actions/setup/action.yml

@@ -0,0 +1,20 @@
+name: Setup Python and Dependencies
+description: Install uv and sync dependencies
+
+runs:
+  using: composite
+  steps:
+    - name: Install uv
+      uses: astral-sh/setup-uv@v4
+      with:
+        enable-cache: true
+
+    - name: Cache dependencies
+      uses: actions/cache@v4
+      with:
+        path: .venv
+        key: ${{ hashFiles('uv.lock') }}
+
+    - name: Install dependencies
+      shell: bash
+      run: uv sync --all-groups

.github/workflows/ci.yml

@@ -11,12 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
-      - name: Install uv
-        uses: astral-sh/setup-uv@v4
-
-      - name: Install dependencies
-        run: uv sync --all-groups
+      - uses: ./.github/actions/setup
 
       - name: Run linter
         run: uv run ruff check src tests
@@ -25,12 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
-      - name: Install uv
-        uses: astral-sh/setup-uv@v4
-
-      - name: Install dependencies
-        run: uv sync --all-groups
+      - uses: ./.github/actions/setup
 
       - name: Run type checker
         run: uv run ty check src
@@ -39,12 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-
-      - name: Install uv
-        uses: astral-sh/setup-uv@v4
-
-      - name: Install dependencies
-        run: uv sync --all-groups
+      - uses: ./.github/actions/setup
 
       - name: Run tests
         run: uv run pytest