rfe: Introduce ruff-pre-commit

Ruff is a fast, extensible Python linter designed to catch common issues
in Python code, such as syntax errors, stylistic inconsistencies, and
potential bugs.

Signed-off-by: Yihuang Yu <[email protected]>

.ci/cfg-lint-check.py

@@ -6,38 +6,38 @@
 
 
 def cfg_lint_check():
-    print('Running cfg lint check...')
+    print("Running cfg lint check...")
     exit_code = 0
     for file in sys.argv[1:]:
         status_code = 0
         blank_line = 0
-        cfg_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
-                                                os.pardir, file))
-        with open(cfg_path, 'r') as f:
+        cfg_path = os.path.abspath(
+            os.path.join(os.path.dirname(__file__), os.pardir, file)
+        )
+        with open(cfg_path, "r") as f:
             contents = f.read()
             for num, line in enumerate(contents.splitlines(), 1):
                 # Only strip whitespaces, handle other blank characters below
-                stripped_line = line.lstrip(' ')
-                blank_line = (blank_line + 1
-                              if re.search(r'^\s*$', stripped_line) else 0)
+                stripped_line = line.lstrip(" ")
+                blank_line = blank_line + 1 if re.search(r"^\s*$", stripped_line) else 0
                 if blank_line >= 2:
-                    print(f'{file}:{num}: Too many blank lines')
+                    print(f"{file}:{num}: Too many blank lines")
                     status_code = 1
-                if re.search(r'\s$', line):
-                    print(f'{file}:{num}: Trailing whitespaces')
+                if re.search(r"\s$", line):
+                    print(f"{file}:{num}: Trailing whitespaces")
                     status_code = 1
-                if re.search(r'^\s', stripped_line):
-                    print(f'{file}:{num}: Wrong indent(Unexpected blank characters')
+                if re.search(r"^\s", stripped_line):
+                    print(f"{file}:{num}: Wrong indent(Unexpected blank characters")
                     status_code = 1
                 if (len(line) - len(stripped_line)) % 4:
-                    print(f'{file}:{num}: Wrong indent(4x spaces mismatch)')
+                    print(f"{file}:{num}: Wrong indent(4x spaces mismatch)")
                     status_code = 1
-            if not contents.endswith('\n'):
-                print(f'{file} Missing final newline')
+            if not contents.endswith("\n"):
+                print(f"{file} Missing final newline")
                 status_code = 1
         exit_code = exit_code or status_code
     sys.exit(exit_code)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     cfg_lint_check()

.pre-commit-config.yaml

@@ -20,3 +20,9 @@ repos:
     args: ["--fix=lf"]
   - id: no-commit-to-branch
   - id: trailing-whitespace
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: v0.6.1
+  hooks:
+    - id: ruff
+      args: ["--fix"]
+    - id: ruff-format

.ruff.toml

@@ -0,0 +1,38 @@
+# Same as Black.
+line-length = 88
+indent-width = 4
+
+[lint]
+select = [
+    # pycodestyle
+    "E",
+    "W",
+    # Pyflakes
+    "F",
+    # flake8-logging-format
+    "G",
+    # pylint Error
+    "PLE",
+    # pyupgrade
+    "UP",
+    # isort
+    "I",
+]
+ignore = ["E402", "E501", "E722", "E741", "UP015"]
+
+# Allow fix for all enabled rules (when `--fix`) is provided.
+fixable = ["ALL"]
+unfixable = []
+
+[format]
+# Like Black, use double quotes for strings.
+quote-style = "double"
+
+# Like Black, indent with spaces, rather than tabs.
+indent-style = "space"
+
+# Like Black, respect magic trailing commas.
+skip-magic-trailing-comma = false
+
+# Like Black, automatically detect the appropriate line ending.
+line-ending = "auto"