#!/bin/bash
set -e
echo 'Testing whether migrations are consistent with models'

# Check if any migration looks to have a meaningless 'auto' name,
# other than the existing handful from 2016 and 2017.
new_auto_named_migrations=$(./manage.py showmigrations \
    | grep -E ' [0-9]{4}_auto_' \
    | grep -Eve ' [0-9]{4}_auto_201[67]' \
           -e ' 0052_auto_fix_realmalias_realm_nullable' \
           -e ' 0003_auto_20150817_1733' \
           -e ' 0002_auto_20150110_0810' \
    | sed 's/\[[x ]\] /  /' \
 || true)
if [ "$new_auto_named_migrations" != "" ]; then
    echo "ERROR: New migrations with unclear automatically generated names."
    echo "Please rename these migrations to have readable names:"
    echo
    echo "$new_auto_named_migrations"
    echo
    echo 'See https://zulip.readthedocs.io/en/latest/subsystems/schema-migrations.html for advice.'
    echo
    exit 1
fi

if ! ./manage.py makemigrations --check --dry-run; then
    echo
    # shellcheck disable=SC2016
    echo 'ERROR: Migrations are not consistent with models!  Fix with `./tools/renumber-migrations`.'
    echo 'See https://zulip.readthedocs.io/en/latest/subsystems/schema-migrations.html for details.'
    echo
    exit 1
fi

echo "Success!  Migrations are consistent with models."