linux-kernel - [PATCH v2] gen_compile_commands.py: fix path resolve with symlinks in it

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Message-Id: <20231205021523.4152128-2-xujialu@vimux.org>
Date:   Tue,  5 Dec 2023 10:15:26 +0800
From:   Jialu Xu <xujialu@...ux.org>
To:     nathan@...nel.org, ndesaulniers@...gle.com, morbo@...gle.com,
        justinstitt@...gle.com
Cc:     llvm@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Jialu Xu <xujialu@...ux.org>
Subject: [PATCH v2] gen_compile_commands.py: fix path resolve with symlinks in it

When symbolic links are involved in the path, os.path.abspath might not
resolve the symlinks and instead return the absolute path with the
symlinks intact.

Use pathlib.Path resolve() instead of os.path.abspath()

Signed-off-by: Jialu Xu <xujialu@...ux.org>
---
 scripts/clang-tools/gen_compile_commands.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/clang-tools/gen_compile_commands.py b/scripts/clang-tools/gen_compile_commands.py
index 180952fb91c1b..99e28b7152c19 100755
--- a/scripts/clang-tools/gen_compile_commands.py
+++ b/scripts/clang-tools/gen_compile_commands.py
@@ -11,6 +11,7 @@ import argparse
 import json
 import logging
 import os
+from pathlib import Path
 import re
 import subprocess
 import sys
@@ -172,8 +173,9 @@ def process_line(root_directory, command_prefix, file_path):
     # by Make, so this code replaces the escaped version with '#'.
     prefix = command_prefix.replace('\#', '#').replace('$(pound)', '#')
 
-    # Use os.path.abspath() to normalize the path resolving '.' and '..' .
-    abs_path = os.path.abspath(os.path.join(root_directory, file_path))
+    # Make the path absolute, resolving all symlinks on the way and also normalizing it.
+    # Convert Path object to a string because 'PosixPath' is not JSON serializable.
+    abs_path = str(Path(root_directory, file_path).resolve())
     if not os.path.exists(abs_path):
         raise ValueError('File %s not found' % abs_path)
     return {
-- 
2.39.2