run clang-format on the current branch, show diff, optionally apply

gistfile1.txt

#!/bin/sh

PARENT="origin/dev"
clang_format=$(which clang-format || (echo "could not find clang-format!"; return 1))

diff_files=$(git diff --name-only $PARENT)
diff_cc_files=$(find $diff_files -name "*.cc" -or -name "*.c" -or -name "*.h")

if [[ -z "$diff_cc_files" ]]; then
  return 0;
fi

fixcount=$($clang_format -output-replacements-xml $diff_cc_files | grep offset | wc -l)

if [[ "$fixcount" -eq 0 ]]; then
  return 0;
else
  (
    echo "Found formatting problems -- listing fix diff below!"
    echo $diff_cc_files
    echo "----------------------------------------------------"
  
    for f in $diff_cc_files; do
      clang-format $f | git diff -R --no-index -- - $f
    done
  ) | less
fi

echo "Apply changes [y/N]? "
read APPLY

if [[ "$APPLY" -eq "y" ]]; then
  $clang_format -i $diff_cc_files
fi