Merge bitcoin/bitcoin#24916: lint: Convert lint-python-utf8-encoding.sh to Python

035eef4be6071a060260907001363a0d12f1f2d2 lint: Convert lint-python-utf8-encoding.sh to Python (Dimitri)

Pull request description:

  A port of `test/lint/lint-python-utf8-encoding.sh` to a Python-script as part of the request of #24783. Checked for output-consistency.

ACKs for top commit:
  laanwj:
    Code review ACK 035eef4be6071a060260907001363a0d12f1f2d2

Tree-SHA512: a8a2f505bf7953d318837182101346c44e73cfd1bf3b5342ff1400fb1c67c5292519fa99db1035da87cf27fb5f5ac5d28871bf55a1c085b5f8a3bb33ff0fa3fb

2 files changed, 73 insertions, 28 deletions

diff --git a/test/lint/lint-python-utf8-encoding.py b/test/lint/lint-python-utf8-encoding.py
new file mode 100755
index 0000000000..62fdc34d50
--- /dev/null
+++ b/test/lint/lint-python-utf8-encoding.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+#
+# Copyright (c) 2018-2022 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+#
+# Make sure we explicitly open all text files using UTF-8 (or ASCII) encoding to
+# avoid potential issues on the BSDs where the locale is not always set.
+
+import sys
+import re
+
+from subprocess import check_output, CalledProcessError
+
+EXCLUDED_DIRS = ["src/crc32c/"]
+
+
+def get_exclude_args():
+    return [":(exclude)" + dir for dir in EXCLUDED_DIRS]
+
+
+def check_fileopens():
+    fileopens = list()
+
+    try:
+        fileopens = check_output(["git", "grep", r" open(", "--", "*.py"] + get_exclude_args(), universal_newlines=True, encoding="utf8").splitlines()
+    except CalledProcessError as e:
+        if e.returncode > 1:
+            raise e
+
+    filtered_fileopens = [fileopen for fileopen in fileopens if not re.search(r"encoding=.(ascii|utf8|utf-8).|open\([^,]*, ['\"][^'\"]*b[^'\"]*['\"]", fileopen)]
+
+    return filtered_fileopens
+
+
+def check_checked_outputs():
+    checked_outputs = list()
+
+    try:
+        checked_outputs = check_output(["git", "grep", "check_output(", "--", "*.py"] + get_exclude_args(), universal_newlines=True, encoding="utf8").splitlines()
+    except CalledProcessError as e:
+        if e.returncode > 1:
+            raise e
+
+    filtered_checked_outputs = [checked_output for checked_output in checked_outputs if re.search(r"universal_newlines=True", checked_output) and not re.search(r"encoding=.(ascii|utf8|utf-8).", checked_output)]
+
+    return filtered_checked_outputs
+
+
+def main():
+    exit_code = 0
+
+    nonexplicit_utf8_fileopens = check_fileopens()
+    if nonexplicit_utf8_fileopens:
+        print("Python's open(...) seems to be used to open text files without explicitly specifying encoding='utf8':\n")
+        for fileopen in nonexplicit_utf8_fileopens:
+            print(fileopen)
+        exit_code = 1
+
+    nonexplicit_utf8_checked_outputs = check_checked_outputs()
+    if nonexplicit_utf8_checked_outputs:
+        if nonexplicit_utf8_fileopens:
+            print("\n")
+        print("Python's check_output(...) seems to be used to get program outputs without explicitly specifying encoding='utf8':\n")
+        for checked_output in nonexplicit_utf8_checked_outputs:
+            print(checked_output)
+        exit_code = 1
+
+    sys.exit(exit_code)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/test/lint/lint-python-utf8-encoding.sh b/test/lint/lint-python-utf8-encoding.sh
deleted file mode 100755
index 6e5b18fc23..0000000000
--- a/test/lint/lint-python-utf8-encoding.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env bash
-#
-# Copyright (c) 2018-2020 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-#
-# Make sure we explicitly open all text files using UTF-8 (or ASCII) encoding to
-# avoid potential issues on the BSDs where the locale is not always set.
-
-export LC_ALL=C
-EXIT_CODE=0
-OUTPUT=$(git grep " open(" -- "*.py" ":(exclude)src/crc32c/" | grep -vE "encoding=.(ascii|utf8|utf-8)." | grep -vE "open\([^,]*, ['\"][^'\"]*b[^'\"]*['\"]")
-if [[ ${OUTPUT} != "" ]]; then
-    echo "Python's open(...) seems to be used to open text files without explicitly"
-    echo "specifying encoding=\"utf8\":"
-    echo
-    echo "${OUTPUT}"
-    EXIT_CODE=1
-fi
-OUTPUT=$(git grep "check_output(" -- "*.py" ":(exclude)src/crc32c/"| grep "universal_newlines=True" | grep -vE "encoding=.(ascii|utf8|utf-8).")
-if [[ ${OUTPUT} != "" ]]; then
-    echo "Python's check_output(...) seems to be used to get program outputs without explicitly"
-    echo "specifying encoding=\"utf8\":"
-    echo
-    echo "${OUTPUT}"
-    EXIT_CODE=1
-fi
-exit ${EXIT_CODE}