Support requirements.txt for version-file

.github/workflows/test.yml

@@ -118,6 +118,23 @@ jobs:
           fi
         env:
           RUFF_VERSION: ${{ steps.ruff-action.outputs.ruff-version }}
+  test-default-version-from-requirements:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use default version from requirements.txt
+        id: ruff-action
+        uses: ./
+        with:
+          src: __tests__/fixtures/requirements
+          version-file: __tests__/fixtures/requirements/requirements.txt
+      - name: Correct version gets installed
+        run: |
+          if [ "$RUFF_VERSION" != "0.8.3" ]; then
+            exit 1
+          fi
+        env:
+          RUFF_VERSION: ${{ steps.ruff-action.outputs.ruff-version }}
   test-semver-range:
     runs-on: ubuntu-latest
     steps:

README.md

@@ -133,6 +133,15 @@ Currently `pyproject.toml` is supported.
     version-file: "my-path/to/pyproject.toml"
 ```
 
+And `requirements.txt` is supported.
+
+```yaml
+- name: Install a version from a specified version file
+  uses: astral-sh/ruff-action@v3
+  with:
+    version-file: "my-path/to/requirements.txt"
+```
+
 ### Validate checksum
 
 You can specify a checksum to validate the downloaded executable. Checksums up to the default version

__tests__/fixtures/requirements/requirements.txt

@@ -0,0 +1 @@
+ruff==0.8.3

src/utils/pyproject.ts

@@ -19,28 +19,32 @@ export function getRuffVersionFromPyproject(
         "dependency-groups"?: Map<string, Array<string | object>>;
       }
     | undefined;
-  try {
-    pyproject = toml.parse(pyprojectContent);
-  } catch (err) {
-    const message = (err as Error).message;
-    core.warning(`Error while parsing ${filePath}: ${message}`);
-    return undefined;
+  let allDependencies: string[];
+  if (filePath.endsWith(".txt")) {
+    allDependencies = pyprojectContent.split("\n");
+  } else {
+    try {
+      pyproject = toml.parse(pyprojectContent);
+      const dependencies: string[] = pyproject?.project?.dependencies || [];
+      const optionalDependencies: string[] = Object.values(
+        pyproject?.project?.["optional-dependencies"] || {},
+      ).flat();
+      const devDependencies: string[] = Object.values(
+        pyproject?.["dependency-groups"] || {},
+      )
+        .flat()
+        .filter((item: string | object) => typeof item === "string");
+      allDependencies = dependencies.concat(
+        optionalDependencies,
+        devDependencies,
+      );
+    } catch (err) {
+      const message = (err as Error).message;
+      core.warning(`Error while parsing ${filePath}: ${message}`);
+      return undefined;
+    }
   }
 
-  const dependencies: string[] = pyproject?.project?.dependencies || [];
-  const optionalDependencies: string[] = Object.values(
-    pyproject?.project?.["optional-dependencies"] || {},
-  ).flat();
-  const devDependencies: string[] = Object.values(
-    pyproject?.["dependency-groups"] || {},
-  )
-    .flat()
-    .filter((item: string | object) => typeof item === "string");
-  const allDependencies: string[] = dependencies.concat(
-    optionalDependencies,
-    devDependencies,
-  );
-
   const ruffVersionDefinition = allDependencies.find((dep: string) =>
     dep.startsWith("ruff"),
   );