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#!/usr/bin/env bash
SOURCE_COMMIT="$1"
if [ "$#" -gt 0 ]; then
shift
fi
# If no source commit is given target the default branch
if [ "x$SOURCE_COMMIT" = "x" ]; then
# If remote is not set use the remote of the current branch or fallback to "origin"
if [ "x$REMOTE" = "x" ]; then
BRANCH="$(git rev-parse --abbrev-ref HEAD)"
REMOTE="$(git config --local --get "branch.$BRANCH.remote" || echo 'origin')"
fi
SOURCE_COMMIT="remotes/$REMOTE/HEAD"
fi
# Force colored diff output
DIFF_COLOR_SAVED="$(git config --local --get color.diff)"
if [ "x$DIFF_COLOR_SAVED" != "x" ]; then
git config --local --replace-all "color.diff" "always"
else
git config --local --add "color.diff" "always"
fi
scratch="$(mktemp -t check-format.XXXXXXXXXX)"
finish () {
# Remove temporary file
rm -rf "$scratch"
# Restore setting
if [ "x$DIFF_COLOR_SAVED" != "x" ]; then
git config --local --replace-all "color.diff" "$DIFF_COLOR_SAVED"
else
git config --local --unset "color.diff"
fi
}
# The trap will be invoked whenever the script exits, even due to a signal, this is a bash only
# feature
trap finish EXIT
GIT_CLANG_FORMAT="${GIT_CLANG_FORMAT:-git-clang-format}"
"$GIT_CLANG_FORMAT" --style=file --extensions=cc,cp,cpp,c++,cxx,cu,cuh,hh,hpp,hxx,hip,vert,frag --diff "$@" "$SOURCE_COMMIT" > "$scratch"
# Check for no-ops
grep '^no modified files to format$\|^clang-format did not modify any files$' \
"$scratch" > /dev/null && exit 0
# Dump formatting diff and signal failure
printf \
"\033[31m==== FORMATTING VIOLATIONS DETECTED ====\033[0m
run '\033[33m%s --style=file %s %s\033[0m' to apply these formating changes\n\n" \
"$GIT_CLANG_FORMAT" "$*" "$SOURCE_COMMIT"
cat "$scratch"
exit 1
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