#!/bin/sh
set -eu

# This script extracts the package DB originally came from GHC you are
# using. Only needed when you create a hadrian bootstrap archive.

if [ "$#" -lt 1 ]; then
    echo >&2 "Usage: $0 PKG_DB_DIR"
    exit
fi
PKG_DB_DIR="$1"

mkdir -p "$PKG_DB_DIR"
pkg_info -qL ghc | {
    conf_dir_path=
    while read path; do
        conf_dir_removed="${path#*/package.conf.d/}"
        if [ "$conf_dir_removed" != "$path" ]; then
            echo "Copying ${path}..."
            if [ "$conf_dir_path" = "" ]; then
                conf_dir_path="${path%/${conf_dir_removed}}"
            fi
            sed -e "s|\\\${pkgroot}|${conf_dir_path}/..|g" \
                < "${path}" \
                > "${PKG_DB_DIR}/${conf_dir_removed}"
        fi
    done
}
ghc-pkg --package-db="$PKG_DB_DIR" recache