Add check.py

This is one script which checks the code quality of Python and Dart
sources.

It can be symlinked as `.git/hooks/pre-commit` to guard commits of
questionable quality.

1 files changed, 89 insertions, 0 deletions

diff --git a/check.py b/check.py
new file mode 100755
index 0000000..858309c
--- /dev/null
+++ b/check.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+
+
+import pathlib
+import subprocess
+import shutil
+import sys
+
+
+SCRIPT = pathlib.Path(__file__).resolve()
+ROOT = SCRIPT.parent
+
+
+def main() -> None:
+    print("Checking source files ...")
+
+    success = True
+
+    for check in (mypy, flake8, black, flutter_analyze):
+        print(f"Checking with {check.__name__} ...")
+        try:
+            check()
+            print(f"OK - {check.__name__} succeeded.")
+        except subprocess.CalledProcessError:
+            success = False
+
+    if not success:
+        print("At least one check failed.")
+        sys.exit(1)
+
+    print("Finished without errors.")
+
+
+def mypy() -> None:
+    command = [
+        "mypy",
+        "--strict",
+    ]
+
+    for f in get_python_files():
+        command.append(str(f))
+
+    subprocess.run(command, shell=False, check=True)
+
+
+def flake8() -> None:
+    command = [
+        "flake8",
+    ]
+
+    for f in get_python_files():
+        command.append(str(f))
+
+    subprocess.run(command, shell=False, check=True)
+
+
+def black() -> None:
+    command = [
+        "black",
+        "--check",
+    ]
+
+    for f in get_python_files():
+        command.append(str(f))
+
+    subprocess.run(command, shell=False, check=True)
+
+
+def get_python_files() -> tuple[pathlib.Path, ...]:
+    return tuple(ROOT.glob("*.py"))
+
+
+def flutter_analyze() -> None:
+    maybe_flutter = shutil.which("flutter")
+    if maybe_flutter is None:
+        print("Could not find 'flutter' executable.")
+        sys.exit(1)
+    flutter = str(maybe_flutter)
+
+    command = [
+        flutter,
+        "analyze",
+    ]
+
+    subprocess.run(command, cwd=ROOT, shell=False, check=True)
+
+
+if __name__ == "__main__":
+    main()