1 files changed, 59 insertions, 0 deletions
diff --git a/util/sort_by_unconvered.py b/util/sort_by_unconvered.py
new file mode 100755
index 0000000000..217c613aaa
--- /dev/null
+++ b/util/sort_by_unconvered.py
@@ -0,0 +1,59 @@
+#!/usr/bin/python3
+# Copyright 2022 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Prints out the lines in an lcov info file in order by uncovered lines.
+
+For example to find the file with the most uncovered lines in herobrine (and
+therefore the likest easy win) run the coverage commands in zephyr/README.md
+and then run:
+
+util/sort_by_unconvered.py build/zephyr/herobrine_final.info | head
+"""
+
+import argparse
+import re
+import subprocess
+
+
+def main():
+    """Main function"""
+    parser = argparse.ArgumentParser(allow_abbrev=False)
+    parser.add_argument(
+        "lcov_files",
+        nargs="+",
+        metavar="lcov_file",
+        help="Name(s) of the lcov files to analyze",
+        default=[],
+    )
+    args = parser.parse_args()
+
+    cmd = ["lcov", "--list-full-path", "--list"] + args.lcov_files
+    output = subprocess.run(
+        cmd, check=True, stdout=subprocess.PIPE, universal_newlines=True
+    ).stdout
+
+    pattern = re.compile(r"^(/\S+)\s*\|\s*([0-9\.]*)%\s*(\d+)\s*\|")
+    results = []
+    for line in output.splitlines():
+        match = pattern.match(line)
+        if match:
+            results.append(
+                (
+                    match[1],  # Filename
+                    match[2],  # Percent
+                    int(match[3]),  # Total lines
+                    int(
+                        float(match[2]) * int(match[3]) / 100.0
+                    ),  # Covered Lines
+                )
+            )
+
+    results.sort(key=lambda x: x[2] - x[3], reverse=True)
+    for res in results:
+        print(f"{res[0]}: {res[3]}/{res[2]} ({res[1]}%)")
+
+
+if __name__ == "__main__":
+    main()