darkrc/githooks/pre-commit

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#!/bin/sh
indentation=$(git config hooks.indentation)
temp=$(mktemp -p /dev/shm -d -t git-hook.XXXX)
export GIT_DIR=$(git rev-parse --show-toplevel)/.git
new() {
git status --porcelain | grep -E '^AM|^M|^A' | sed 's/^[^ ]* *//'
}
check() {
file=$2
luajit -e "
for line in assert(io.open('$file')):lines() do
if not line:match('^%s*'):match('^$1*$') then
print('File \x1b[31m$file\x1b[00m is incorrectly indented!')
os.exit(1)
end
end"
}
git checkout-index --prefix="$temp/index/" --all
cd $temp/index/
case $indentation in
tab|tabs)
echo "Checking tab indentation"
for file in $(new); do
check '\t' $file || error=1
done
;;
space|spaces)
echo "Checking space indentation"
for file in $(new); do
check ' ' $file || error=1
done
;;
""|off)
echo "Skipping indentation check"
;;
*)
echo "Cannot check for indentation type \033[31m'$indentation'\033[00m"
exit 1
;;
esac
cd $GIT_DIR
rm -rf $temp
if [ -z "$error" ]
then exit 0
else exit 1
fi