#!/usr/bin/env bash
set -e
set -x

GITID=$(git rev-parse HEAD)

if [ -z "$1" ]; then
    echo "Usage: $0 <ZULIP_VERSION>"
    exit 1
fi
version="$1"
prefix="zulip-server-$version"

if [ "$(uname)" = "Darwin" ]; then
    TMPDIR=/tmp/voyager-build
    rm -Rf "$TMPDIR"
    mkdir -p "$TMPDIR"
else
    TMPDIR=$(mktemp -d)
fi

if ! git diff --exit-code >/dev/null; then
    set +x
    echo; echo "\033[31mWARNING: tarballs builds are based on a commit hash so your changes will not be included\033[0m"; echo
    set -x
fi

TMP_CHECKOUT=$TMPDIR/$prefix/
TARBALL=$TMPDIR/$prefix.tar

# .gitattributes lists the files that are not exported
git archive -o "$TARBALL" "--prefix=$prefix/" HEAD


if tar -tf "$TARBALL" | grep -q -e zilencer -e zproject/local_settings.py -e puppet/zulip_internal; then
	echo "Excluded files remain in tarball!";
	echo "Versions of git 1.8.1.1 - 1.8.1.6 have broken .gitattributes syntax";
	exit 1;
else
	echo "Check for excluded files passed";
fi

# Check out a temporary full copy of the index to generate static files
git checkout-index -f -a --prefix "$TMP_CHECKOUT"
cd "$TMP_CHECKOUT"

# create var/log directory in the new temporary checkout
mkdir -p "var/log"

# Some settings need to be updated for update-prod-static to work
#
# TODO: Would be much better to instead run the below tools with some
# sort of environment hack to make settings.VOYAGER=True so that we
# don't need to create this dummy secrets file.
cat >> zproject/prod_settings_template.py <<EOF
DEBUG = False
EOF
cat >> zproject/dev-secrets.conf <<EOF
[secrets]
local_database_password = ''
secret_key = 'not_used_here'
shared_secret = 'not_used_here'
avatar_salt = 'not_used_here'
rabbitmq_password = 'not_used_here'
initial_password_salt = 'not_used_here'
EOF

# update-prod-static generates the prod-static directory.
# See COLLECTSTATIC in settings.py
set +x
echo; echo "\033[33mRunning update-prod-static; check ${TMP_CHECKOUT}update-prod-static.log if it fails\033[0m"; echo
set -x

./tools/update-prod-static
echo "$GITID" > build_id
echo "$version" > version
mv var/log/update-prod-static.log ../

rm -f zproject/dev-secrets.conf

# We don't need duplicate copies of emoji with hashed paths, and they would break bugdown
find prod-static/serve/third/gemoji/images/emoji/ -regex '.*\.[0-9a-f]+\.png' -delete

cd "$TMPDIR"

tar --append -f "$TARBALL" "$prefix/prod-static" "$prefix/build_id" "$prefix/version"

rm -rf "$prefix"

gzip "$TARBALL"
echo "Generated $TARBALL.gz"