Bash alias to format files that changed before commit

.bash_rc

#format only files that have a diff
alias gformat="git diff --name-only --ignore-submodules | xargs -I {} sh -c 'export f="{}"; cd \$(git rev-parse --show-toplevel) && [[ -f \$f ]] && echo formatting \$f && clang-format -i --style=file \$f || echo directory  \$f'"
#fix osx gitgui bug + format all files + open git gui and gitk (I use these a lot to commit)
alias gh="git config --local --unset gui.geometry && git push& gformat && git gui & gitk &"