#!/bin/sh

echo "*** GET BUSYBOX BEGIN ***"

setvar SRC_DIR = $(pwd)

# Grab everything after the '=' character.
setvar DOWNLOAD_URL = $(grep -i ^BUSYBOX_SOURCE_URL .config | cut -f2 -d'=')

# Grab everything after the last '/' character.
setvar ARCHIVE_FILE = ${DOWNLOAD_URL##*/}

# Read the 'USE_LOCAL_SOURCE' property from '.config'
setvar USE_LOCAL_SOURCE = "$(grep -i ^USE_LOCAL_SOURCE .config | cut -f2 -d'=')"

if test $USE_LOCAL_SOURCE = "true" -a ! -f $SRC_DIR/source/$ARCHIVE_FILE  {
  echo "Source bundle $SRC_DIR/source/$ARCHIVE_FILE is missing and will be downloaded."
  setvar USE_LOCAL_SOURCE = ""false""
}

cd source

if test ! $USE_LOCAL_SOURCE = "true"  {
  # Downloading BusyBox source bundle file. The '-c' option allows the download to resume.
  echo "Downloading BusyBox source bundle from $DOWNLOAD_URL"
  wget -c $DOWNLOAD_URL
} else {
  echo "Using local BusyBox source bundle $SRC_DIR/source/$ARCHIVE_FILE"
}

# Delete folder with previously extracted busybox.
echo "Removing BusyBox work area. This may take a while..."
rm -rf ../work/busybox
mkdir ../work/busybox

# Extract busybox to folder 'busybox'.
# Full path will be something like 'work/busybox/busybox-1.24.2'.
tar -xvf $ARCHIVE_FILE -C ../work/busybox

cd $SRC_DIR

echo "*** GET BUSYBOX END ***"