#!/usr/bin/env bash
# Shows why the tests pin -Duser.timezone=UTC. pgjdbc sends the JVM's default zone to Postgres as
# the TimeZone startup parameter. A JVM whose zone is the legacy id Asia/Calcutta then fails with
#   FATAL: invalid value for parameter "TimeZone": "Asia/Calcutta"
# on a Postgres whose tzdata lacks the legacy alias. Needs psql and a database reachable with
# IDEM_DB_* (defaults match application.yml). Writes output/00-timezone-trap.txt.
set -uo pipefail
cd "$(dirname "$0")/.."
mkdir -p output
export PGPASSWORD="${IDEM_DB_PASSWORD:-idem}"
P=(psql -h "${IDEM_DB_HOST:-localhost}" -U "${IDEM_DB_USER:-idem}" "${IDEM_DB_NAME:-idem}")
{
  echo "\$ psql -c \"SHOW server_version\""
  "${P[@]}" -t -A -c "SHOW server_version" 2>&1
  echo
  echo "\$ psql -c \"SET timezone='Asia/Calcutta'\""
  "${P[@]}" -c "SET timezone='Asia/Calcutta'" 2>&1
  echo
  echo "\$ psql -c \"SET timezone='Asia/Kolkata'\""
  "${P[@]}" -c "SET timezone='Asia/Kolkata'" 2>&1
  echo
  echo "\$ ls /usr/share/zoneinfo/Asia | grep -E 'Calcutta|Kolkata'"
  ls /usr/share/zoneinfo/Asia | grep -E 'Calcutta|Kolkata'
  echo
  echo "\$ dpkg -l tzdata | tail -1"
  dpkg -l tzdata | tail -1 | awk '{print $2, $3}'
} > output/00-timezone-trap.txt
cat output/00-timezone-trap.txt