#!/usr/bin/env bash

# Deny execution as root user
uid=$(id -u)
username=$(whoami)
if [[ ${uid} == 0 ]] || [[ ${username} == root ]]; then
    msg_error "$(basename ${0}) should be executed by a regular user, not with root."
    exit 1
fi

unset uid
unset username

export SFPM_MAKEPKG_ENV=$(basename $(mktemp -u sfpm.makepkg.XXXXXX))
export sfpm_build_scriptdir=$(pwd)

source "$(dirname ${BASH_SOURCE[0]})/../share/sfpm/common.sh"
source "${sfpm_internal_include}/build.sh"

# --- Functions

cleanup() {
    if [[ ${buildroot} == *${sfpm_tmpdir}* ]]; then
        msg "Removing ${buildroot}"
        rm -rf "${buildroot}"
    fi

    if [[ $(sfpm_env_exists ${SFPM_MAKEPKG_ENV}) ]]; then
        deactivate
        sfpm_env_remove "${SFPM_MAKEPKG_ENV}"
    fi
}
trap cleanup EXIT SIGINT SIGTERM

# --- Main

# Assimilate build definition
msg "Sourcing build script"
source ${1}

# Sanity checks
msg "Validating build script"
sfpm_check_required_keys

# Create buildroot
buildroot=$(sfpm_gen_buildroot)
root="${buildroot}/root"
pkgdir="${buildroot}/pkg"
srcdir="${buildroot}/src"

mkdir -p "${root}" "${pkgdir}" "${srcdir}"

# Generate temporary sfpm build environment
sfpm_env_create "${SFPM_MAKEPKG_ENV}"

# Activate temporary sfpm build environment (provides ${SFPM_ENV})
source ${sfpm_envdir}/${SFPM_MAKEPKG_ENV}/bin/activate

# Setup compiler/linker flags
sfpm_build_cflags="-I${SFPM_ENV}/include ${sfpm_build_cflags}"
sfpm_build_ldflags="-L${SFPM_ENV}/lib ${sfpm_build_ldflags}"

# Ensure local dependencies resolve during build
export LD_LIBRARY_PATH="${SFPM_ENV}/lib"

msg "Executing tasks"
pushd "${root}"
    sfpm_build_env_do_depends "${SFPM_MAKEPKG_ENV}"
    sources_fetch
    sfpm_sources_cmp_sha256
    sources_extract "${srcdir}"
    prepare
    build
    check
    package
    sfpm_gen_packages
popd