Detect required-version from config file

Search for uv.toml and pyproject.toml in repo root or supplied input.
Search for required-version value and use it to determine uv version to download.

.github/workflows/test.yml

@@ -64,6 +64,39 @@ jobs:
           fi
         env:
           UV_VERSION: ${{ steps.setup-uv.outputs.uv-version }}
+  test-version-pyproject-file:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install version 0.5.14
+        id: setup-uv
+        uses: ./
+        with:
+          pyproject-file: "__tests__/fixtures/pyproject-toml-project/pyproject.toml"
+      - name: Correct version gets installed
+        run: |
+          if [ "$UV_VERSION" != "0.5.14" ]; then
+            exit 1
+          fi
+        env:
+          UV_VERSION: ${{ steps.setup-uv.outputs.uv-version }}
+  test-version-uv-file:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install version 0.5.15
+        id: setup-uv
+        uses: ./
+        with:
+          pyproject-file: "__tests__/fixtures/uv-toml-project/pyproject.toml"
+          uv-file: "__tests__/fixtures/uv-toml-project/uv.toml"
+      - name: Correct version gets installed
+        run: |
+          if [ "$UV_VERSION" != "0.5.15" ]; then
+            exit 1
+          fi
+        env:
+          UV_VERSION: ${{ steps.setup-uv.outputs.uv-version }}
   test-checksum:
     runs-on: ${{ matrix.os }}
     strategy:

__tests__/fixtures/pyproject-toml-project/.python-version

@@ -0,0 +1 @@
+3.11

__tests__/fixtures/pyproject-toml-project/hello.py

@@ -0,0 +1,6 @@
+def main():
+    print("Hello from pyproject-toml-project!")
+
+
+if __name__ == "__main__":
+    main()

__tests__/fixtures/pyproject-toml-project/pyproject.toml

@@ -0,0 +1,10 @@
+[project]
+name = "pyproject-toml-project"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.11"
+dependencies = []
+
+[tool.uv]
+required-version = "==0.5.14"

__tests__/fixtures/uv-toml-project/.python-version

@@ -0,0 +1 @@
+3.11

__tests__/fixtures/uv-toml-project/hello.py

@@ -0,0 +1,6 @@
+def main():
+    print("Hello from uv-toml-project!")
+
+
+if __name__ == "__main__":
+    main()

__tests__/fixtures/uv-toml-project/pyproject.toml

@@ -0,0 +1,10 @@
+[project]
+name = "uv-toml-project"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.11"
+dependencies = []
+
+[tool.uv]
+required-version = "==0.5.14"

__tests__/fixtures/uv-toml-project/uv.toml

@@ -0,0 +1 @@
+required-version = "==0.5.15"

action.yml

@@ -4,8 +4,14 @@ description:
 author: "astral-sh"
 inputs:
   version:
-    description: "The version of uv to install"
-    default: "latest"
+    description: "The version of uv to install e.g., `0.5.0` Defaults to the version in pyproject.toml or 'latest'."
+    default: ""
+  pyproject-file:
+    description: "Path to a pyproject.toml"
+    default: ""
+  uv-file:
+    description: "Path to a uv.toml"
+    default: ""
   python-version:
     description: "The version of Python to set UV_PYTHON to"
     required: false
@@ -18,7 +24,7 @@ inputs:
     required: false
     default: ${{ github.token }}
   enable-cache:
-    description: "Enable caching of the uv cache"
+    description: "Enable uploading of the uv cache"
     default: "auto"
   cache-dependency-glob:
     description: