# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2009-2016 Stephan Raue (stephan@openelec.tv)
# Copyright (C) 2018 Team LibreELEC (https://libreelec.tv)
# Copyright (C) 2018-present Team CoreELEC (https://coreelec.org)

PKG_NAME="busybox"
PKG_VERSION="1.36.1"
PKG_LICENSE="GPL"
PKG_SITE="http://www.busybox.net"
PKG_URL="http://busybox.net/downloads/${PKG_NAME}-${PKG_VERSION}.tar.bz2"
PKG_DEPENDS_HOST="gcc:host"
PKG_DEPENDS_TARGET="toolchain busybox:host hdparm hd-idle dosfstools e2fsprogs zip unzip usbutils parted procps-ng gptfdisk libtirpc"
PKG_DEPENDS_INIT="toolchain libtirpc"
PKG_LONGDESC="BusyBox combines tiny versions of many common UNIX utilities into a single small executable."
# busybox fails to build with GOLD support enabled with binutils-2.25
PKG_BUILD_FLAGS="-parallel -gold"
PKG_NEED_UNPACK="${PROJECT_DIR}/${PROJECT}/initramfs"

# nano text editor
if [ "${NANO_EDITOR}" = "yes" ]; then
  PKG_DEPENDS_TARGET="${PKG_DEPENDS_TARGET} nano"
fi

# nfs support
if [ "${NFS_SUPPORT}" = yes ]; then
  PKG_DEPENDS_TARGET="${PKG_DEPENDS_TARGET} rpcbind"
fi

if [ "${TARGET_ARCH}" = "x86_64" ]; then
  PKG_DEPENDS_TARGET+=" pciutils"
fi

pre_build_target() {
  PKG_MAKE_OPTS_TARGET="ARCH=${TARGET_ARCH} \
                        HOSTCC=${HOST_CC} \
                        CROSS_COMPILE=${TARGET_PREFIX} \
                        KBUILD_VERBOSE=1 \
                        install"

  mkdir -p ${PKG_BUILD}/.${TARGET_NAME}
  cp -RP ${PKG_BUILD}/* ${PKG_BUILD}/.${TARGET_NAME}
}

pre_build_host() {
  PKG_MAKE_OPTS_HOST="ARCH=${TARGET_ARCH} CROSS_COMPILE= KBUILD_VERBOSE=1 install"

  mkdir -p ${PKG_BUILD}/.${HOST_NAME}
  cp -RP ${PKG_BUILD}/* ${PKG_BUILD}/.${HOST_NAME}
}

pre_build_init() {
  PKG_MAKE_OPTS_INIT="ARCH=${TARGET_ARCH} \
                      HOSTCC=${HOST_CC} \
                      CROSS_COMPILE=${TARGET_PREFIX} \
                      KBUILD_VERBOSE=1 \
                      install"

  mkdir -p ${PKG_BUILD}/.${TARGET_NAME}-init
  cp -RP ${PKG_BUILD}/* ${PKG_BUILD}/.${TARGET_NAME}-init
}

configure_host() {
  cd ${PKG_BUILD}/.${HOST_NAME}
    cp ${PKG_DIR}/config/busybox-host.conf .config

    # set install dir
    sed -i -e "s|^CONFIG_PREFIX=.*$|CONFIG_PREFIX=\"${PKG_BUILD}/.install_host\"|" .config

    make oldconfig
}

configure_target() {
  cd ${PKG_BUILD}/.${TARGET_NAME}
    find_file_path config/busybox-target.conf
    cp $FOUND_PATH .config

    # set install dir
    sed -i -e "s|^CONFIG_PREFIX=.*$|CONFIG_PREFIX=\"${INSTALL}/usr\"|" .config

    if [ ! "$CRON_SUPPORT" = "yes" ] ; then
      sed -i -e "s|^CONFIG_CROND=.*$|# CONFIG_CROND is not set|" .config
      sed -i -e "s|^CONFIG_FEATURE_CROND_D=.*$|# CONFIG_FEATURE_CROND_D is not set|" .config
      sed -i -e "s|^CONFIG_CRONTAB=.*$|# CONFIG_CRONTAB is not set|" .config
      sed -i -e "s|^CONFIG_FEATURE_CROND_SPECIAL_TIMES=.*$|# CONFIG_FEATURE_CROND_SPECIAL_TIMES is not set|" .config
    fi

    if [ ! "$SAMBA_SUPPORT" = yes ]; then
      sed -i -e "s|^CONFIG_FEATURE_MOUNT_CIFS=.*$|# CONFIG_FEATURE_MOUNT_CIFS is not set|" .config
    fi

    # optimize for size
    CFLAGS=`echo ${CFLAGS} | sed -e "s|-Ofast|-Os|"`
    CFLAGS=`echo ${CFLAGS} | sed -e "s|-O.|-Os|"`
    CFLAGS="${CFLAGS} -I${SYSROOT_PREFIX}/usr/include/tirpc"

    LDFLAGS="${LDFLAGS} -fwhole-program"

    make oldconfig
}

configure_init() {
  cd ${PKG_BUILD}/.${TARGET_NAME}-init
  find_file_path config/busybox-init.conf
  cp $FOUND_PATH .config

  # set install dir
  sed -i -e "s|^CONFIG_PREFIX=.*$|CONFIG_PREFIX=\"${INSTALL}/usr\"|" .config

  # optimize for size
  CFLAGS=`echo ${CFLAGS} | sed -e "s|-Ofast|-Os|"`
  CFLAGS=`echo ${CFLAGS} | sed -e "s|-O.|-Os|"`
  CFLAGS="${CFLAGS} -I${SYSROOT_PREFIX}/usr/include/tirpc"

  LDFLAGS="${LDFLAGS} -fwhole-program"

  make oldconfig
}

makeinstall_host() {
  mkdir -p ${TOOLCHAIN}/bin
  cp -R ${PKG_BUILD}/.install_host/bin/* ${TOOLCHAIN}/bin
}

makeinstall_target() {
  mkdir -p ${INSTALL}/usr/bin
    [ ${TARGET_ARCH} = x86_64 ] && cp ${PKG_DIR}/scripts/getedid ${INSTALL}/usr/bin
    cp ${PKG_DIR}/scripts/dthelper ${INSTALL}/usr/bin
      ln -sf dthelper ${INSTALL}/usr/bin/dtfile
      ln -sf dthelper ${INSTALL}/usr/bin/dtflag
      ln -sf dthelper ${INSTALL}/usr/bin/dtname
      ln -sf dthelper ${INSTALL}/usr/bin/dtsoc
    cp ${PKG_DIR}/scripts/lsb_release ${INSTALL}/usr/bin/
    cp ${PKG_DIR}/scripts/pastebinit ${INSTALL}/usr/bin/
    ln -sf pastebinit ${INSTALL}/usr/bin/paste

  mkdir -p ${INSTALL}/usr/lib/coreelec
    cp ${PKG_DIR}/scripts/functions ${INSTALL}/usr/lib/coreelec
    cp ${PKG_DIR}/scripts/fs-resize ${INSTALL}/usr/lib/coreelec
    sed -e "s/@DISTRONAME@/${DISTRONAME}/g" \
        -i ${INSTALL}/usr/lib/coreelec/fs-resize

    if listcontains "${FIRMWARE}" "rpi-eeprom"; then
      cp ${PKG_DIR}/scripts/rpi-flash-firmware ${INSTALL}/usr/lib/libreelec
    fi

  mkdir -p ${INSTALL}/etc
    cp ${PKG_DIR}/config/profile ${INSTALL}/etc
    cp ${PKG_DIR}/config/inputrc ${INSTALL}/etc
    cp ${PKG_DIR}/config/httpd.conf ${INSTALL}/etc
    cp ${PKG_DIR}/config/suspend-modules.conf ${INSTALL}/etc

  # /etc/fstab is needed by...
    touch ${INSTALL}/etc/fstab

  # /etc/machine-id, needed by systemd and dbus
    ln -sf /storage/.cache/systemd-machine-id ${INSTALL}/etc/machine-id

  # /etc/mtab is needed by udisks etc...
    ln -sf /proc/self/mounts ${INSTALL}/etc/mtab

  # create /etc/hostname
    ln -sf /proc/sys/kernel/hostname ${INSTALL}/etc/hostname

  # create folder for named tables support
    ln -sf /storage/.config/iproute2 ${INSTALL}/etc/iproute2

  # add webroot
    mkdir -p ${INSTALL}/usr/www
      echo "It works" > ${INSTALL}/usr/www/index.html

    mkdir -p ${INSTALL}/usr/www/error
      echo "404" > ${INSTALL}/usr/www/error/404.html
}

post_install() {
  ### This resolves a conflict with the bash package.
  if [ "$(readlink ${INSTALL}/usr/bin/sh)" = "busybox" ]
  then
    rm -f ${INSTALL}/usr/bin/sh
    ln -s bash ${INSTALL}/usr/bin/sh
  fi
  ROOT_PWD="`${TOOLCHAIN}/bin/cryptpw -m sha512 ${ROOT_PASSWORD}`"

  echo "chmod 4755 ${INSTALL}/usr/bin/busybox" >> $FAKEROOT_SCRIPT
  echo "chmod 000 ${INSTALL}/usr/cache/shadow" >> $FAKEROOT_SCRIPT

  add_user root "${ROOT}_PWD" 0 0 "Root User" "/storage" "/bin/sh"
  add_group root 0
  add_group users 100

  add_user nobody x 65534 65534 "Nobody" "/" "/bin/sh"
  add_group nogroup 65534

  enable_service shell.service
  enable_service show-version.service
  enable_service var.mount
  enable_service proc-sys-fs-binfmt_misc.mount

  listcontains "${FIRMWARE}" "rpi-eeprom" && enable_service rpi-flash-firmware.service

  # cron support
  if [ "$CRON_SUPPORT" = "yes" ] ; then
    mkdir -p ${INSTALL}/usr/lib/systemd/system
      cp ${PKG_DIR}/system.d.opt/cron.service ${INSTALL}/usr/lib/systemd/system
      enable_service cron.service
    mkdir -p ${INSTALL}/usr/share/services
      cp -P ${PKG_DIR}/default.d/*.conf ${INSTALL}/usr/share/services
      cp ${PKG_DIR}/system.d.opt/cron-defaults.service ${INSTALL}/usr/lib/systemd/system
      enable_service cron-defaults.service
  fi
}

makeinstall_init() {
  mkdir -p ${INSTALL}/bin
    ln -sf busybox ${INSTALL}/usr/bin/sh
    ln -sf busybox ${INSTALL}/usr/bin/bash
    ln -sf busybox ${INSTALL}/usr/bin/bc
    chmod 4755 ${INSTALL}/usr/bin/busybox

  mkdir -p ${INSTALL}/etc
    touch ${INSTALL}/etc/fstab
    ln -sf /proc/self/mounts ${INSTALL}/etc/mtab

  if find_file_path initramfs/platform_init; then
    cp ${FOUND_PATH} ${INSTALL}
    sed -e "s/@BOOT_LABEL@/${DISTRO_BOOTLABEL}/g" \
        -e "s/@DISK_LABEL@/${DISTRO_DISKLABEL}/g" \
        -i ${INSTALL}/platform_init
    chmod 755 ${INSTALL}/platform_init
  fi

  cp ${PKG_DIR}/scripts/functions ${INSTALL}
  cp ${PKG_DIR}/scripts/init ${INSTALL}

  if [ -e "${PROJECT_DIR}/${PROJECT}/devices/${DEVICE}/device.init" ]
  then
    cp ${PROJECT_DIR}/${PROJECT}/devices/${DEVICE}/device.init ${INSTALL}
  else
    touch ${INSTALL}/device.init
  fi
  chmod 755 ${INSTALL}/device.init

  sed -e "s/@DISTRONAME@/${DISTRONAME}/g" \
      -e "s/@DEVICENAME@/${DEVICE}/g" \
      -e "s/@KERNEL_NAME@/${KERNEL_NAME}/g" \
      -i ${INSTALL}/init
  chmod 755 ${INSTALL}/init
}