[RFC PATCH 5/5] perf/tests: convert check_errors_whitelisted.pl to Python

[Breno Rodrigues Alves <breno3011alves@gmail.com>]

Faithful re-implementation of tools/perf/tests/shell/common/
check_errors_whitelisted.pl in Python 3 (stdlib only). Same
whitelist file handling, same regex matching, same exit codes.

Verified byte-for-byte identical to the Perl version.

Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>
---
 .../shell/common/check_errors_whitelisted.py  | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100755 tools/perf/tests/shell/common/check_errors_whitelisted.py

diff --git a/tools/perf/tests/shell/common/check_errors_whitelisted.py b/tools/perf/tests/shell/common/check_errors_whitelisted.py
new file mode 100755
index 000000000..352eb1a9d
--- /dev/null
+++ b/tools/perf/tests/shell/common/check_errors_whitelisted.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import os
+import re
+import sys
+
+
+def main(argv):
+    if argv:
+        whitelist = argv[0]
+        try:
+            with open(whitelist) as f:
+                regexps = [ln.rstrip("\n") for ln in f]
+        except OSError:
+            sys.exit(f"Checker error: Unable to open the whitelist file: {whitelist}")
+    else:
+        regexps = []
+
+    max_printed = 20
+    if "TESTLOG_ERR_MSG_MAX_LINES" in os.environ:
+        try:
+            max_printed = int(os.environ["TESTLOG_ERR_MSG_MAX_LINES"])
+        except ValueError:
+            pass
+
+    quiet = True
+    try:
+        if int(os.environ.get("TESTLOG_VERBOSITY", "0")) >= 2:
+            quiet = False
+    except ValueError:
+        pass
+
+    passed = True
+    lines_printed = 0
+
+    for line in sys.stdin:
+        line = line.rstrip("\n")
+        matched = False
+        for r in regexps:
+            if re.search(r, line):
+                matched = True
+                break
+        if not matched:
+            show = lines_printed < max_printed
+            lines_printed += 1
+            if show and not quiet:
+                print(f'Line did not match any pattern: "{line}"')
+            passed = False
+
+    return 0 if passed else 1
+
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv[1:]))
\ No newline at end of file
-- 
2.43.0