#!/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="${STAGING_DIR:-$SCRIPT_DIR/tmp}"
readonly POSTGRES_ROOT="${POSTGRES_ROOT:-/app/postgres/rdbms}"
readonly PGAUDIT_REPOSITORY="${PGAUDIT_REPOSITORY:-pgaudit/pgaudit}"

if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
  show_help "$0" "Build and install pgAudit for an existing PostgreSQL installation."
  exit 0
fi

POSTGRES_VERSION="$(parse_postgresql_version "$@")"
readonly POSTGRES_VERSION
validate_postgresql_version "$POSTGRES_VERSION"
require_tools curl tar make
readonly PREFIX="${PREFIX:-$POSTGRES_ROOT/$POSTGRES_VERSION}"
readonly PG_CONFIG="$PREFIX/bin/pg_config"
require_postgresql_installation "$PREFIX"
reset_staging_dir "$STAGING_DIR"

readonly PGAUDIT_TAG="${PGAUDIT_TAG:-$(latest_pgaudit_tag "$PGAUDIT_REPOSITORY" "${POSTGRES_VERSION%%.*}")}"
[[ -n "$PGAUDIT_TAG" ]] || die "could not determine the latest pgAudit release"
readonly PGAUDIT_DIR="$STAGING_DIR/pgaudit-${PGAUDIT_TAG#v}"

printf 'Building pgAudit %s\n' "$PGAUDIT_TAG"
download_source "$STAGING_DIR" "$PGAUDIT_REPOSITORY" "$PGAUDIT_TAG" \
  "pgaudit-${PGAUDIT_TAG#v}.tar.gz" "$PGAUDIT_DIR"
cd "$PGAUDIT_DIR"
make -j"${JOBS:-$(nproc)}" USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
make install USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
test -x "$PREFIX/lib/pgaudit.so"

readonly SAVED_SOURCE_DIR="$(copy_install_source "$PGAUDIT_DIR" "$PREFIX" "pgaudit-$PGAUDIT_TAG")"
write_install_recipe "$SAVED_SOURCE_DIR" "$POSTGRES_VERSION" "$PREFIX" <<'RECIPE'
cd "$SCRIPT_DIR"

# Configure
# pgAudit uses PGXS directly and does not require a separate configure step.

# Make
make -j"$JOBS" USE_PGXS=1 PG_CONFIG="$PG_CONFIG"

# Make install
make install USE_PGXS=1 PG_CONFIG="$PG_CONFIG"
RECIPE