#!/usr/bin/env bash

set -Eeuo pipefail

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=install_common.sh
source "$SCRIPT_DIR/install_common.sh"

readonly STAGING_DIR="${STAGING_DIR:-/app/staging_area/copilot/tmp}"
readonly POSTGRES_ROOT="${POSTGRES_ROOT:-/app/postgres/rdbms}"

[[ $# -eq 1 ]] || die "Usage: $0 <postgresql-version>"
readonly POSTGRES_VERSION="$1"
validate_postgresql_version "$POSTGRES_VERSION"
require_tools curl tar make gcc

readonly PREFIX="$POSTGRES_ROOT/$POSTGRES_VERSION"
readonly PG_BIN="$PREFIX/bin"
readonly PG_CONFIG="$PG_BIN/pg_config"
[[ "$PREFIX" != "/" ]] || die "PREFIX must not be the filesystem root"
reset_staging_dir "$STAGING_DIR"
rm -rf -- "$PREFIX"
mkdir -p "$STAGING_DIR" "$PREFIX"

printf 'Building PostgreSQL %s\n' "$POSTGRES_VERSION"
readonly POSTGRES_ARCHIVE="$STAGING_DIR/postgresql-$POSTGRES_VERSION.tar.gz"
readonly POSTGRES_SOURCE="$STAGING_DIR/postgresql-$POSTGRES_VERSION"
curl -fL --retry 3 --retry-delay 2 \
  -o "$POSTGRES_ARCHIVE" \
  "https://ftp.postgresql.org/pub/source/v$POSTGRES_VERSION/postgresql-$POSTGRES_VERSION.tar.gz"
tar -xzf "$POSTGRES_ARCHIVE" -C "$STAGING_DIR"

cd "$POSTGRES_SOURCE"
./configure \
  --prefix="$PREFIX" \
  --with-ssl=openssl \
  --with-lz4
make -j"${JOBS:-$(nproc)}"
make install

printf '\nVerification:\n'
"$PG_BIN/postgres" --version
"$PG_CONFIG" --version