$ git commit
gitlint: checking commit message...
2: B4 Second line is not empty: "asdf"
3: B5 Body message is too short (8<20): "asdfasdf"
-----------------------------------------------
gitlint: Your commit message contains the above violations.
Continue with commit anyways (this keeps the current commit message)? [y(es)/n(no)/e(dit)] n
Commit aborted.
Your commit message: 
-----------------------------------------------
asdf
asdf
asdf

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# On branch master
# Changes to be committed:
#	new file:   foo
#
# Untracked files:
#	venv/
#
-----------------------------------------------
$ git commit

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# On branch master
# Changes to be committed:
#   new file:   foo
#
# Untracked files:
#   venv/
#

docker run --interactive --tty debian:stable bash

export DEBIAN_FRONTEND=noninteractive
apt update
apt-get dist-upgrade --assume-yes --quiet < /dev/null
apt-get install --assume-yes --quiet curl git python3 python3-setuptools vim < /dev/null
curl https://bootstrap.pypa.io/get-pip.py | python3 - pre-commit

# make Click happy
export LC_ALL=C.UTF-8
export LANG=C.UTF-8

cd
git clone --mirror https://github.com/jorisroovers/gitlint

mkdir gitlint-test
cd gitlint-test
git init
git config user.email "you@example.com"
git config user.name "Your Name"
git commit --allow-empty --message="Initial empty commit"

cat > save-commit-msg <<'EOF'
#!/usr/bin/env sh

cp "${1}" "$(git rev-parse --git-path pre-commit-saved-commit-msg)"
EOF

cat > restore-commit-msg <<'EOF'
#!/usr/bin/env sh

set -e
set -u

msg_file=$(git rev-parse --git-path pre-commit-saved-commit-msg)
[ -r "${msg_file}" ] || exit 0

nr_of_non_empty_lines=$(sed -e '/^#/d' -e '/^[[:space:]]*$/d' "${1}" | wc -l)
if [ "${nr_of_non_empty_lines}" -ne 0 ]
then
    echo "# last commit message:" >> "${1}"
    sed -e '/^#/d' -e 's/^/# /' "${msg_file}" >> "${1}"
    exit 0
fi

echo 'restoring commit message...'
cp "${msg_file}" "${1}"
EOF

chmod +x save-commit-msg restore-commit-msg
git add save-commit-msg restore-commit-msg
git commit --message='Add {save,restore}-commit-msg'

cat > .pre-commit-config.yaml <<EOF
repos:
  - repo: local
    hooks:
    - id: restore-commit-msg
      entry: restore-commit-msg
      language: script
      name: Restore commit message
      stages:
      - prepare-commit-msg
  - repo: ../gitlint.git
    rev: v0.11.0
    hooks:
    - id: gitlint
      stages:
      - commit-msg
  - repo: local
    hooks:
    - id: save-commit-msg
      entry: save-commit-msg
      language: script
      name: Save commit message
      stages:
      - commit-msg
EOF
git add .pre-commit-config.yaml
git commit --message="Add pre-commit config"

for hook_type in prepare-commit-msg commit-msg
do
    pre-commit install --hook-type "${hook_type}"
done
pre-commit install-hooks

touch foo
git add foo
git commit --message=$'This is a good one\n\nMessage body Message body Message body Message body Message body'
git commit --amend --message=$'This is a bad one\nbooooooo'
git commit --amend