virtualx-engine/misc/scripts/black_format.sh
Rémi Verschelde 266280ffca
CI: Visibly print trailing whitespace when static checks fail
GitHub Actions seems to be hiding colored whitespace, and after lots of
attempts I couldn't find a way to work it around.

So instead I'm using a perl expression to replace trailing spaces with
`·` and tabs with `<TAB>` in the ANSI colored diff output. This ensure
that they're visible, and they are properly colored as expected too.
2023-04-05 18:31:46 +02:00

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#!/usr/bin/env bash
# This script runs black on all Python files in the repo.
set -uo pipefail
# Apply black.
echo -e "Formatting Python files..."
PY_FILES=$(git ls-files -- '*SConstruct' '*SCsub' '*.py' ':!:.git/*' ':!:thirdparty/*')
black -l 120 $PY_FILES
diff=$(git diff --color)
# If no diff has been generated all is OK, clean up, and exit.
if [ -z "$diff" ] ; then
printf "\e[1;32m*** Files in this commit comply with the black style rules.\e[0m\n"
exit 0
fi
# A diff has been created, notify the user, clean up, and exit.
printf "\n\e[1;33m*** The following changes must be made to comply with the formatting rules:\e[0m\n\n"
# Perl commands replace trailing spaces with `·` and tabs with `<TAB>`.
printf "$diff\n" | perl -pe 's/(.*[^ ])( +)(\e\[m)$/my $spaces="·" x length($2); sprintf("$1$spaces$3")/ge' | perl -pe 's/(.*[^\t])(\t+)(\e\[m)$/my $tabs="<TAB>" x length($2); sprintf("$1$tabs$3")/ge'
printf "\n\e[1;91m*** Please fix your commit(s) with 'git commit --amend' or 'git rebase -i <hash>'\e[0m\n"
exit 1