203 lines
6.8 KiB
Bash
Executable file
203 lines
6.8 KiB
Bash
Executable file
#!/usr/bin/env bash
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# git pre-commit hook that runs a black stylecheck.
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# Based on pre-commit-clang-format.
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##################################################################
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# SETTINGS
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# Set path to black binary.
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BLACK=`which black 2>/dev/null`
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BLACK_OPTIONS="-l 120"
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# Remove any older patches from previous commits. Set to true or false.
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DELETE_OLD_PATCHES=false
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# File types to parse.
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FILE_NAMES="SConstruct SCsub"
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FILE_EXTS="py"
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# Use pygmentize instead of cat to parse diff with highlighting.
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# Install it with `pip install pygments` (Linux) or `easy_install Pygments` (Mac)
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PYGMENTIZE=`which pygmentize 2>/dev/null`
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if [ ! -z "$PYGMENTIZE" ]; then
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READER="pygmentize -l diff"
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else
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READER=cat
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fi
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# Path to zenity
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ZENITY=`which zenity 2>/dev/null`
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# Path to xmessage
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XMSG=`which xmessage 2>/dev/null`
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# Path to powershell (Windows only)
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PWSH=`which powershell 2>/dev/null`
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##################################################################
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# There should be no need to change anything below this line.
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. "$(dirname -- "$0")/canonicalize_filename.sh"
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# exit on error
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set -e
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# check whether the given file matches any of the set extensions
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matches_name_or_extension() {
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local filename=$(basename "$1")
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local extension=".${filename##*.}"
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for name in $FILE_NAMES; do [[ "$name" == "$filename" ]] && return 0; done
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for ext in $FILE_EXTS; do [[ "$ext" == "$extension" ]] && return 0; done
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return 1
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}
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# necessary check for initial commit
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if git rev-parse --verify HEAD >/dev/null 2>&1 ; then
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against=HEAD
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else
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# Initial commit: diff against an empty tree object
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against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
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fi
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if [ ! -x "$BLACK" ] ; then
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if [ ! -t 1 ] ; then
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if [ -x "$ZENITY" ] ; then
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$ZENITY --error --title="Error" --text="Error: black executable not found."
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exit 1
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elif [ -x "$XMSG" ] ; then
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$XMSG -center -title "Error" "Error: black executable not found."
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exit 1
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elif [ \( \( "$OSTYPE" = "msys" \) -o \( "$OSTYPE" = "win32" \) \) -a \( -x "$PWSH" \) ]; then
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winmessage="$(canonicalize_filename "./.git/hooks/winmessage.ps1")"
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$PWSH -noprofile -executionpolicy bypass -file "$winmessage" -center -title "Error" --text "Error: black executable not found."
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exit 1
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fi
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fi
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printf "Error: black executable not found.\n"
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printf "Set the correct path in $(canonicalize_filename "$0").\n"
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exit 1
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fi
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# create a random filename to store our generated patch
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prefix="pre-commit-black"
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suffix="$(date +%s)"
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patch="/tmp/$prefix-$suffix.patch"
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# clean up any older black patches
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$DELETE_OLD_PATCHES && rm -f /tmp/$prefix*.patch
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# create one patch containing all changes to the files
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git diff-index --cached --diff-filter=ACMR --name-only $against -- | while read file;
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do
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# ignore thirdparty files
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if grep -q "thirdparty" <<< $file; then
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continue;
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fi
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# ignore file if not one of the names or extensions we handle
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if ! matches_name_or_extension "$file"; then
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continue;
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fi
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# format our file with black, create a patch with diff and append it to our $patch
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# The sed call is necessary to transform the patch from
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# --- $file timestamp
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# +++ $file timestamp
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# to both lines working on the same file and having a/ and b/ prefix.
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# Else it can not be applied with 'git apply'.
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"$BLACK" "$BLACK_OPTIONS" --diff "$file" | \
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sed -e "1s|--- |--- a/|" -e "2s|+++ |+++ b/|" >> "$patch"
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done
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# if no patch has been generated all is ok, clean up the file stub and exit
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if [ ! -s "$patch" ] ; then
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printf "Files in this commit comply with the black formatter rules.\n"
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rm -f "$patch"
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exit 0
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fi
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# a patch has been created, notify the user and exit
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printf "\nThe following differences were found between the code to commit "
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printf "and the black formatter rules:\n\n"
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if [ -t 1 ] ; then
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$READER "$patch"
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printf "\n"
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# Allows us to read user input below, assigns stdin to keyboard
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exec < /dev/tty
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terminal="1"
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else
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cat "$patch"
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printf "\n"
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# Allows non zero zenity/powershell output
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set +e
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terminal="0"
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fi
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while true; do
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if [ $terminal = "0" ] ; then
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if [ -x "$ZENITY" ] ; then
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ans=$($ZENITY --text-info --filename="$patch" --width=800 --height=600 --title="Do you want to apply that patch?" --ok-label="Apply" --cancel-label="Do not apply" --extra-button="Apply and stage")
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if [ "$?" = "0" ] ; then
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yn="Y"
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else
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if [ "$ans" = "Apply and stage" ] ; then
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yn="S"
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else
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yn="N"
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fi
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fi
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elif [ -x "$XMSG" ] ; then
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$XMSG -file "$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?"
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ans=$?
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if [ "$ans" = "100" ] ; then
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yn="Y"
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elif [ "$ans" = "200" ] ; then
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yn="S"
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else
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yn="N"
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fi
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elif [ \( \( "$OSTYPE" = "msys" \) -o \( "$OSTYPE" = "win32" \) \) -a \( -x "$PWSH" \) ]; then
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winmessage="$(canonicalize_filename "./.git/hooks/winmessage.ps1")"
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$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?"
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ans=$?
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if [ "$ans" = "100" ] ; then
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yn="Y"
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elif [ "$ans" = "200" ] ; then
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yn="S"
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else
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yn="N"
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fi
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else
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printf "Error: zenity, xmessage, or powershell executable not found.\n"
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exit 1
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fi
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else
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read -p "Do you want to apply that patch (Y - Apply, N - Do not apply, S - Apply and stage files)? [Y/N/S] " yn
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fi
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case $yn in
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[Yy] ) git apply $patch;
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printf "The patch was applied. You can now stage the changes and commit again.\n\n";
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break
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;;
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[Nn] ) printf "\nYou can apply these changes with:\n git apply $patch\n";
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printf "(may need to be called from the root directory of your repository)\n";
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printf "Aborting commit. Apply changes and commit again or skip checking with";
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printf " --no-verify (not recommended).\n\n";
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break
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;;
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[Ss] ) git apply $patch;
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git diff-index --cached --diff-filter=ACMR --name-only $against -- | while read file;
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do git add $file;
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done
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printf "The patch was applied and the changed files staged. You can now commit.\n\n";
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break
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;;
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* ) echo "Please answer yes or no."
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;;
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esac
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done
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exit 1 # we don't commit in any case
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