#!/bin/sh

set -eux

if test "$#" -gt 1; then
	echo >&2 "Usage: $0 [branch]"
	exit 2
fi

# Check that worktree is clean
if test -n "$(git status --porcelain)"; then
	echo >&2 "FATAL: Tree not clean, refusing to deploy"
	echo "Hint: This is current \`git status\`:"
	git status
	exit 1
fi

if test "$#" -eq 1; then
	branch="$1"
else
	branch=master
fi

# TODO: When deployment is new enough, use the top command.
#currentbranch="$(git branch --show-current)"
currentbranch="$(git branch --format '%(refname:short)')"

# If we are not on target branch, switch and run again
if test "$currentbranch" -ne "$branch"
	exec /bin/sh -eu "git checkout $branch && exec $0"
fi

echo "Deploying branch $branch"

### Deploying starts here ###

git pull
. venv/bin/activate
pip install -U pip setuptools
pip install -r requirements.txt
./manage.py migrate
./manage.py collectstatic # --noinput?
systemctl --user restart wish.service
# TODO: Self-checks? i.e. ./manage.py --check and ./manage.py test?
echo # Just a blank line 
echo '=== Deploy successful ==='