gcov: Solve the problem of incorrect report generation caused by different compilation and test environments

Due to the makefile, the relative paths of the files are different, and
it is impossible to use existing tools such as gcov and lcov to specify
a base compilation path for them.
The solution for Linux is to copy a copy of the source code from
the compilation environment to the test environment,
and there is a place that is consistent with the absolute
path of the compilation environment.
This solution is to pass in the "-b" parameter to directly
modify the info file generated by lcov. The search path will be
executed in the next step of genhtml

Signed-off-by: wangmingrong1 <[email protected]>

Author: W-M-R

tools/gcov.py

@@ -73,6 +73,20 @@ def parse_gcda_data(path):
             output += line.strip()
 
 
+def correct_content_path(file, newpath):
+    with open(file, "r", encoding="utf-8") as f:
+        content = f.read()
+
+    pattern = r"SF:([^\s]*?)/nuttx/include/nuttx"
+    matches = re.findall(pattern, content)
+
+    if matches:
+        new_content = content.replace(matches[0], newpath)
+
+        with open(file, "w", encoding="utf-8") as f:
+            f.write(new_content)
+
+
 def copy_file_endswith(endswith, source_dir, target_dir):
     print(f"Collect {endswith} files {source_dir} -> {target_dir}")
 
@@ -93,6 +107,7 @@ def arg_parser():
     )
     parser.add_argument("-i", "--input", help="Input dump data")
     parser.add_argument("-t", dest="gcov_tool", help="Path to gcov tool")
+    parser.add_argument("-b", dest="base_dir", help="Compile base directory")
     parser.add_argument("-s", dest="gcno_dir", help="Directory containing gcno files")
     parser.add_argument("-a", dest="gcda_dir", help="Directory containing gcda files")
     parser.add_argument("--debug", action="store_true", help="Enable debug mode")
@@ -171,6 +186,9 @@ def main():
             stderr=sys.stdout,
         )
 
+        if args.base_dir:
+            correct_content_path(coverage_file, args.base_dir)
+
         # genhtml generate coverage report
         subprocess.run(
             [