lint: Start to use py lint scripts

test/lint/lint-all.sh

@@ -4,7 +4,7 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
-# This script runs all contrib/devtools/lint-*.sh files, and fails if any exit
+# This script runs all contrib/devtools/lint-* files, and fails if any exit
 # with a non-zero status code.
 
 # This script is intentionally locale dependent by not setting "export LC_ALL=C"
@@ -18,7 +18,7 @@ LINTALL=$(basename "${BASH_SOURCE[0]}")
 
 EXIT_CODE=0
 
-for f in "${SCRIPTDIR}"/lint-*.sh; do
+for f in "${SCRIPTDIR}"/lint-*; do
   if [ "$(basename "$f")" != "$LINTALL" ]; then
     if ! "$f"; then
       echo "^---- failure generated from $f"

test/lint/lint-files.py

@@ -13,6 +13,7 @@ import sys
 from subprocess import check_output
 from typing import Optional, NoReturn
 
+CMD_TOP_LEVEL = ["git", "rev-parse", "--show-toplevel"]
 CMD_ALL_FILES = "git ls-files -z --full-name"
 CMD_SOURCE_FILES = 'git ls-files -z --full-name -- "*.[cC][pP][pP]" "*.[hH]" "*.[pP][yY]" "*.[sS][hH]"'
 CMD_SHEBANG_FILES = "git grep --full-name --line-number -I '^#!'"
@@ -184,6 +185,8 @@ def check_shebang_file_permissions() -> int:
 
 
 def main() -> NoReturn:
+    root_dir = check_output(CMD_TOP_LEVEL).decode("utf8").strip()
+    os.chdir(root_dir)
     failed_tests = 0
     failed_tests += check_all_filenames()
     failed_tests += check_source_filenames()

test/lint/lint-files.sh

@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-# Copyright (c) 2021 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-export LC_ALL=C
-
-set -e
-cd "$(dirname "$0")/../.."
-test/lint/lint-files.py