[RFC PATCH 3/5] perf/tests: convert check_no_patterns_found.pl to Python

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

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

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

Signed-off-by: Breno Rodrigues Alves <breno3011alves@gmail.com>
---
 .../shell/common/check_no_patterns_found.py   | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100755 tools/perf/tests/shell/common/check_no_patterns_found.py

diff --git a/tools/perf/tests/shell/common/check_no_patterns_found.py b/tools/perf/tests/shell/common/check_no_patterns_found.py
new file mode 100755
index 000000000..0e5d931b9
--- /dev/null
+++ b/tools/perf/tests/shell/common/check_no_patterns_found.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import os
+import re
+import sys
+
+
+def main(argv):
+    quiet = True
+    try:
+        if int(os.environ.get("TESTLOG_VERBOSITY", "0")) >= 2:
+            quiet = False
+    except ValueError:
+        pass
+
+    found = set()
+    for line in sys.stdin:
+        line = line.rstrip("\n")
+        for r in argv:
+            if re.search(r, line):
+                found.add(r)
+
+    passed = True
+    for r in argv:
+        if r in found:
+            if not quiet:
+                print(f'Regexp found: "{r}"')
+            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