#!/usr/bin/env bash
set -eu

usage() {
    echo "Usage: $0 <ZULIP_VERSION> [--authors-not-required]" >&2
    exit 1
}

args="$(getopt -o '' -l 'authors-not-required,help' -n "$0" -- "$@")"
eval "set -- $args"

authors_not_required=
while true; do
    case "$1" in
        --authors-not-required)
            authors_not_required=--authors-not-required; shift;;
        --) shift; break;;
        *) usage;;
    esac
done

if [ -z "${1:-}" ]; then
    usage
fi

version="$1"
prefix="zulip-server-$version"

set -x
GITID=$(git rev-parse HEAD)

if ! git diff --exit-code >/dev/null; then
    set +x
    echo "ERROR: tarballs builds are based on a commit hash so your changes "
    echo "will not be included; you should commit or stash them based on "
    echo "what you want and then try again."
    echo
    git diff
    exit 1
fi

TMPDIR=$(mktemp -d)
TARBALL=$TMPDIR/$prefix.tar
BASEDIR=$(pwd)

git archive -o "$TARBALL" "--prefix=$prefix/" HEAD

cd "$TMPDIR"
tar -xf "$TARBALL"
while read -r i; do
    rm -r --interactive=never "${TMPDIR:?}/$prefix/$i";
done < "$TMPDIR/$prefix/tools/release-tarball-exclude.txt"
tar -cf "$TARBALL" "$prefix"
rm -rf "$prefix"

if tar -tf "$TARBALL" | grep -q -e ^zerver/tests; then
    set +x
    echo "BUG: Excluded files remain in tarball!"
    exit 1
fi
cd "$BASEDIR"

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

# Add the git version information file
./tools/cache-zulip-git-version
mv zulip-git-version "$TMPDIR/$prefix/"

cd "$TMPDIR/$prefix"

# 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 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

# We do a bit of gymnastics to have update-prod-static.log be easily
# visible to the user and end up in the same directory as the final
# release tarball.
USER_PROD_STATIC_LOGPATH="$TMPDIR/update-prod-static.log"
BUILD_PROD_STATIC_LOGPATH="$TMPDIR/$prefix/var/log/update-prod-static.log"
ln -nfs "$BUILD_PROD_STATIC_LOGPATH" "$USER_PROD_STATIC_LOGPATH"

./tools/update-prod-static $authors_not_required || (
    set +x
    echo; echo -ne '\033[33mRunning update-prod-static failed. '
    echo -e "Check $TMPDIR/update-prod-static.log for more information.\\033[0m"
    exit 1
)
rm -f "$USER_PROD_STATIC_LOGPATH"
mv "$BUILD_PROD_STATIC_LOGPATH" "$USER_PROD_STATIC_LOGPATH"

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

echo "$GITID" > build_id
echo "$version" > version

cd "$TMPDIR"

tar --append -f "$TARBALL" "$prefix/prod-static" "$prefix/build_id" "$prefix/version" "$prefix/zulip-git-version" "$prefix/locale" "$prefix/staticfiles.json" "$prefix/templates/zerver/emails/compiled" "$prefix/webpack-stats-production.json"

rm -rf "$prefix"

gzip "$TARBALL"

set +x
echo "Generated $TARBALL.gz"