[clang] ced0f28 - Improve clang-format-diff help output (#73491)

[via cfe-commits]

Author: serge-sans-paille
Date: 2023-11-28T13:46:37Z
New Revision: ced0f28a35b8a14759e6bd9418e8c8a7c35775c8

URL: https://github.com/llvm/llvm-project/commit/ced0f28a35b8a14759e6bd9418e8c8a7c35775c8
DIFF: https://github.com/llvm/llvm-project/commit/ced0f28a35b8a14759e6bd9418e8c8a7c35775c8.diff

LOG: Improve clang-format-diff help output (#73491)

It is quite common to symlink clang-format-diff.py to clang-format-diff,
and in that case the help output still refers to the .py version.
Compute it instead to work in both setup.

Added: 
    

Modified: 
    clang/tools/clang-format/clang-format-diff.py

Removed: 
    


################################################################################
diff  --git a/clang/tools/clang-format/clang-format-
diff .py b/clang/tools/clang-format/clang-format-
diff .py
index 892c1e38a462ff4..b25ee8f4337518e 100755
--- a/clang/tools/clang-format/clang-format-
diff .py
+++ b/clang/tools/clang-format/clang-format-
diff .py
@@ -13,8 +13,8 @@
 lines. This is useful to reformat all the lines touched by a specific patch.
 Example usage for git/svn users:
 
-  git 
diff  -U0 --no-color --relative HEAD^ | clang-format-
diff .py -p1 -i
-  svn 
diff  --
diff -cmd=
diff  -x-U0 | clang-format-
diff .py -i
+  git 
diff  -U0 --no-color --relative HEAD^ | {clang_format_
diff } -p1 -i
+  svn 
diff  --
diff -cmd=
diff  -x-U0 | {clang_format_
diff } -i
 
 It should be noted that the filename contained in the 
diff  is used unmodified
 to determine the source file to update. Users calling this script directly
@@ -25,6 +25,7 @@
 
 import argparse
 import 
diff lib
+import os
 import re
 import subprocess
 import sys
@@ -36,8 +37,10 @@
 
 
 def main():
+    basename = os.path.basename(sys.argv[0])
     parser = argparse.ArgumentParser(
-        description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
+        description=__doc__.format(clang_format_
diff =basename),
+        formatter_class=argparse.RawDescriptionHelpFormatter,
     )
     parser.add_argument(
         "-i",