autoupdate mypy

.github/workflows/ci-pre-commit-autoupdate.yaml

@@ -25,8 +25,8 @@ jobs:
         uses: actions/setup-python@v2
       - name: upgrade pip
         run: python -m pip install --upgrade pip
-      - name: install pre-commit
-        run: python -m pip install --upgrade pre-commit
+      - name: install dependencies
+        run: python -m pip install --upgrade pre-commit pyyaml packaging
       - name: version info
         run: python -m pip list
       - name: autoupdate
@@ -35,7 +35,10 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           EXECUTE_COMMANDS: |
             python -m pre_commit autoupdate
+            python .github/workflows/sync_linter_versions.py .pre-commit-config.yaml ci/requirements/mypy_only
           COMMIT_MESSAGE: 'pre-commit: autoupdate hook versions'
+          COMMIT_NAME: 'github-actions[bot]'
+          COMMIT_EMAIL: 'github-actions[bot]@users.noreply.github.com'
           PR_TITLE: 'pre-commit: autoupdate hook versions'
           PR_BRANCH_PREFIX: 'pre-commit/'
           PR_BRANCH_NAME: 'autoupdate-${PR_ID}'

.github/workflows/sync_linter_versions.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+import argparse
+import pathlib
+
+import yaml
+from packaging import version
+
+
+def extract_version(config, name):
+    repos = config.get("repos")
+    if repos is None:
+        raise ValueError("invalid pre-commit configuration")
+
+    for repo in repos:
+        hooks = repo["hooks"]
+        hook_names = [hook["id"] for hook in hooks]
+        if name in hook_names:
+            return version.parse(repo["rev"])
+
+    raise KeyError(f"cannot find hook {name!r} in the pre-commit configuration")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--dry", action="store_true")
+    parser.add_argument(
+        metavar="pre-commit-config", dest="pre_commit_config", type=pathlib.Path
+    )
+    parser.add_argument("requirements", type=pathlib.Path)
+    args = parser.parse_args()
+
+    with args.pre_commit_config.open() as f:
+        config = yaml.safe_load(f)
+
+    mypy_version = extract_version(config, "mypy")
+
+    requirements = args.requirements.read_text()
+    new_requirements = "\n".join(
+        [
+            line if not line.startswith("mypy=") else f"mypy={mypy_version}"
+            for line in requirements.split("\n")
+        ]
+    )
+
+    if args.dry:
+        separator = "\n" + "—" * 80 + "\n"
+        print(
+            "contents of the new requirements file:",
+            new_requirements,
+            sep=separator,
+            end=separator,
+        )
+    else:
+        args.requirements.write_text(new_requirements)