#!/usr/bin/env bash # git pre-commit hook that runs a clang-format stylecheck. # Features: # - abort commit when commit does not comply with the style guidelines # - create a patch of the proposed style changes # Modifications for clang-format by rene.milk@wwu.de # This file is part of a set of unofficial pre-commit hooks available # at github. # Link: https://github.com/githubbrowser/Pre-commit-hooks # Contact: David Martin, david.martin.mailbox@googlemail.com # Some quality of life modifications made for Godot Engine. ################################################################## # SETTINGS # Set path to clang-format binary. CLANG_FORMAT=`which clang-format 2>/dev/null` # Remove any older patches from previous commits. Set to true or false. DELETE_OLD_PATCHES=false # Only parse files with the extensions in FILE_EXTS. Set to true or false. # If false every changed file in the commit will be parsed with clang-format. # If true only files matching one of the extensions are parsed with clang-format. PARSE_EXTS=true # File types to parse. Only effective when PARSE_EXTS is true. FILE_EXTS=".c .h .cpp .hpp .cc .hh .cxx .m .mm .inc .java .glsl" # Use pygmentize instead of cat to parse diff with highlighting. # Install it with `pip install pygments` (Linux) or `easy_install Pygments` (Mac) PYGMENTIZE=`which pygmentize 2>/dev/null` if [ ! -z "$PYGMENTIZE" ]; then READER="pygmentize -l diff" else READER=cat fi # Path to zenity ZENITY=`which zenity 2>/dev/null` # Path to xmessage XMSG=`which xmessage 2>/dev/null` # Path to powershell (Windows only) PWSH=`which powershell 2>/dev/null` ################################################################## # There should be no need to change anything below this line. . "$(dirname -- "$0")/canonicalize_filename.sh" # exit on error set -e # check whether the given file matches any of the set extensions matches_extension() { local filename=$(basename "$1") local extension=".${filename##*.}" local ext for ext in $FILE_EXTS; do [[ "$ext" == "$extension" ]] && return 0; done return 1 } # necessary check for initial commit if git rev-parse --verify HEAD >/dev/null 2>&1 ; then against=HEAD else # Initial commit: diff against an empty tree object against=4b825dc642cb6eb9a060e54bf8d69288fbee4904 fi # To get consistent formatting, we recommend contributors to use the same # clang-format version as CI. RECOMMENDED_CLANG_FORMAT_MAJOR_MIN="12" RECOMMENDED_CLANG_FORMAT_MAJOR_MAX="13" if [ ! -x "$CLANG_FORMAT" ] ; then message="Error: clang-format executable not found. Please install clang-format $RECOMMENDED_CLANG_FORMAT_MAJOR_MAX." if [ ! -t 1 ] ; then if [ -x "$ZENITY" ] ; then $ZENITY --error --title="Error" --text="$message" exit 1 elif [ -x "$XMSG" ] ; then $XMSG -center -title "Error" "$message" exit 1 elif [ \( \( "$OSTYPE" = "msys" \) -o \( "$OSTYPE" = "win32" \) \) -a \( -x "$PWSH" \) ]; then winmessage="$(canonicalize_filename "./.git/hooks/winmessage.ps1")" $PWSH -noprofile -executionpolicy bypass -file "$winmessage" -center -title "Error" --text "$message" exit 1 fi fi printf "$message\n" printf "Set the correct path in $(canonicalize_filename "$0").\n" exit 1 fi # The returned string can be inconsistent depending on where clang-format comes from. # Example output strings reported by `clang-format --version`: # - Ubuntu: "Ubuntu clang-format version 11.0.0-2" # - Fedora: "clang-format version 11.0.0 (Fedora 11.0.0-2.fc33)" CLANG_FORMAT_VERSION="$(clang-format --version | sed "s/[^0-9\.]*\([0-9\.]*\).*/\1/")" CLANG_FORMAT_MAJOR="$(echo "$CLANG_FORMAT_VERSION" | cut -d. -f1)" if [[ "$CLANG_FORMAT_MAJOR" -lt "$RECOMMENDED_CLANG_FORMAT_MAJOR_MIN" || "$CLANG_FORMAT_MAJOR" -gt "$RECOMMENDED_CLANG_FORMAT_MAJOR_MAX" ]]; then echo "Warning: Your clang-format binary is the wrong version ($CLANG_FORMAT_VERSION, expected between $RECOMMENDED_CLANG_FORMAT_MAJOR_MIN and $RECOMMENDED_CLANG_FORMAT_MAJOR_MAX)." echo " Consider upgrading or downgrading clang-format as formatting may not be applied correctly." fi # create a random filename to store our generated patch prefix="pre-commit-clang-format" suffix="$(date +%s)" patch="/tmp/$prefix-$suffix.patch" # clean up any older clang-format patches $DELETE_OLD_PATCHES && rm -f /tmp/$prefix*.patch # create one patch containing all changes to the files git diff-index --cached --diff-filter=ACMR --name-only $against -- | while read file; do # ignore thirdparty files if grep -q "thirdparty" <<< $file; then continue; fi if grep -q "platform/android/java/lib/src/com" <<< $file; then continue; fi if grep -q "\-so_wrap." <<< $file; then continue; fi # ignore file if we do check for file extensions and the file # does not match any of the extensions specified in $FILE_EXTS if $PARSE_EXTS && ! matches_extension "$file"; then continue; fi # clang-format our sourcefile, create a patch with diff and append it to our $patch # The sed call is necessary to transform the patch from # --- $file timestamp # +++ - timestamp # to both lines working on the same file and having a/ and b/ prefix. # Else it can not be applied with 'git apply'. "$CLANG_FORMAT" -style=file "$file" --Wno-error=unknown | \ diff -u "$file" - | \ sed -e "1s|--- |--- a/|" -e "2s|+++ -|+++ b/$file|" >> "$patch" done # if no patch has been generated all is ok, clean up the file stub and exit if [ ! -s "$patch" ] ; then printf "Files in this commit comply with the clang-format rules.\n" rm -f "$patch" exit 0 fi # a patch has been created, notify the user and exit printf "\nThe following differences were found between the code to commit " printf "and the clang-format rules:\n\n" if [ -t 1 ] ; then $READER "$patch" printf "\n" # Allows us to read user input below, assigns stdin to keyboard exec < /dev/tty terminal="1" else cat "$patch" printf "\n" # Allows non zero zenity/powershell output set +e terminal="0" fi while true; do if [ $terminal = "0" ] ; then if [ -x "$ZENITY" ] ; then choice=$($ZENITY --text-info --filename="$patch" --width=800 --height=600 --title="Do you want to apply that patch?" --ok-label="Apply" --cancel-label="Do not apply" --extra-button="Apply and stage") if [ "$?" = "0" ] ; then yn="Y" else if [ "$choice" = "Apply and stage" ] ; then yn="S" else yn="N" fi fi elif [ -x "$XMSG" ] ; then $XMSG -file "$patch" -buttons "Apply":100,"Apply and stage":200,"Do not apply":0 -center -default "Do not apply" -geometry 800x600 -title "Do you want to apply that patch?" choice=$? if [ "$choice" = "100" ] ; then yn="Y" elif [ "$choice" = "200" ] ; then yn="S" else yn="N" fi elif [ \( \( "$OSTYPE" = "msys" \) -o \( "$OSTYPE" = "win32" \) \) -a \( -x "$PWSH" \) ]; then winmessage="$(canonicalize_filename "./.git/hooks/winmessage.ps1")" $PWSH -noprofile -executionpolicy bypass -file "$winmessage" -file "$patch" -buttons "Apply":100,"Apply and stage":200,"Do not apply":0 -center -default "Do not apply" -geometry 800x600 -title "Do you want to apply that patch?" choice=$? if [ "$choice" = "100" ] ; then yn="Y" elif [ "$choice" = "200" ] ; then yn="S" else yn="N" fi else printf "Error: zenity, xmessage, or powershell executable not found.\n" exit 1 fi else read -p "Do you want to apply that patch (Y - Apply, N - Do not apply, S - Apply and stage files)? [Y/N/S] " yn fi case $yn in [Yy] ) git apply $patch; printf "The patch was applied. You can now stage the changes and commit again.\n\n"; break ;; [Nn] ) printf "\nYou can apply these changes with:\n git apply $patch\n"; printf "(may need to be called from the root directory of your repository)\n"; printf "Aborting commit. Apply changes and commit again or skip checking with"; printf " --no-verify (not recommended).\n\n"; break ;; [Ss] ) git apply $patch; git diff-index --cached --diff-filter=ACMR --name-only $against -- | while read file; do git add $file; done printf "The patch was applied and the changed files staged. You can now commit.\n\n"; break ;; * ) echo "Please answer yes or no." ;; esac done exit 1 # we don't commit in any case