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#!/bin/sh

TOPLEVEL=$(git rev-parse --show-toplevel)
RES=0

cd $TOPLEVEL

if [ "$1" == "--install" ]; then
    ln -sf ../../tools/pre-commit-hook .git/hooks/pre-commit
    exit
fi

tmpdir=$(mktemp -d precommit.XXXXXX) || exit 1
trap "rm -rf $TOPLEVEL/$tmpdir" 0

git diff --cached --name-only --diff-filter=ACMR |
    xargs git checkout-index --prefix=$tmpdir/ --

cd $tmpdir

echo "=== starting pre-commit checks ==="

echo "Checking the following files:"

find . -type f

echo "=== bashate checks ==="

find . -type f -print0 |
    xargs -0 --no-run-if-empty egrep -lZ '^#!/bin/(ba)?sh' |
    xargs -0 bashate || RES=1

echo "=== yaml checks ==="

find . -name '*.yaml' -print0 |
    xargs -0 --no-run-if-empty ${TOPLEVEL}/tools/validate-yaml.py \
        || RES = 1

echo "=== json checks ==="

find . -name '*.json' -print0 |
    xargs -0 --no-run-if-empty ${TOPLEVEL}/tools/validate-json.py \
        || RES=1

echo "=== maintainer checks ==="

find . -name Dockerfile -print0 |
    xargs -0 --no-run-if-empty ${TOPLEVEL}/tools/validate-maintainer \
        || RES=1

exit $RES