db/scripts/migrate.sh

#! /bin/bash

set -e

source ./scripts/common.sh
source ./scripts/env.sh ./.env

if [[ -n $(git status --porcelain) ]]; then
  echo "git working tree dirty" 1>&2;
  exit 1;
fi

to_tag="$1"

get_dnim_database_count="copy (select count(*) from pg_database where datname = 'dnim') to stdout with null as '';"
dnim_database_count=$(query "$POSTGRES_URI/postgres" "$get_dnim_database_count")

if [[ "$dnim_database_count" = "0" ]]; then
  echo "fresh database"
  query "$POSTGRES_URI/postgres" "create database dnim;"
  ls ./schema/ | xargs -I{} bash -c "$(declare -f query_file); query_file \"$POSTGRES_URI/dnim\" ./schema/{}"
  rev_last='empty'
  script=''
else
  get_rev_last="copy (select to_revision from migration order by performed_on desc limit 1) to stdout with null as '';"
  rev_last=$(query "$POSTGRES_URI/dnim" "$get_rev_last")
  migration=$(./scripts/diff.sh "$rev_last" "$to_tag")

  if [[ "$2" = "--greenlight" ]]; then
    query_file "$POSTGRES_URI/dnim" "$migration"
  else
    echo "migration available at $migration"
    echo "review and rerun with --greenlight to apply"
    exit
  fi
fi

insert_migration="insert into migration (from_revision, to_revision) values ('$rev_last', '$to_tag');"
query "$POSTGRES_URI/dnim" "$insert_migration"
echo "inserted migration"