get and prepare u-boot sources for building

#!/bin/bash

#get the current script path

SCRIPT=$(readlink -f "$0")

SCRIPTPATH=$(dirname "$SCRIPT")

#constants

UBOOT_TREE="$SCRIPTPATH/u-boot-tree"

CONFIGS="include/configs"

EZYNQ="ezynq"

REPO_DIR_NAME=u-boot-xlnx

SUFFIX=".orig"

INITENV="initenv"

OVERWRITE_INITENV=1

CROSS_COMPILE="arm-poky-linux-gnueabi-"

COMPILE_PATH="/opt/poky/1.4/sysroots/x86_64-pokysdk-linux/usr/bin/armv7a-vfp-neon-poky-linux-gnueabi/"

echo "Step 1: Cloning Xilinx's u-boot repository (master-next branch)"

if [ ! -d "$REPO_DIR_NAME/.git" ]; then

  git clone -b master-next https://github.com/Xilinx/u-boot-xlnx.git "$REPO_DIR_NAME"

else

  echo "  Already there"

fi

echo "Step 2: Checking out u-boot version with the hash 'e1808144fdbc79159b72318e6eb8bcab03fd9bf4'"

cd "$REPO_DIR_NAME"

git checkout e1808144fdbc79159b72318e6eb8bcab03fd9bf4

echo "Step 3: Merging ezynq with u-boot"

echo "Step 3a: Creating symbolic link for the root folder"

if [ ! -h $EZYNQ ]; then

  ln -s $SCRIPTPATH $EZYNQ

fi

echo "Step 3b: Creating symbolic link for the 'ezynq' folder"

if [ ! -h "$CONFIGS/$EZYNQ" ]; then

  ln -s "$UBOOT_TREE/$CONFIGS/$EZYNQ" $CONFIGS

fi

echo "Step 3c: Creating symbolic links for separate files (a suffix is added to the originals)"

for SRC in $(find $UBOOT_TREE -type f -not -path "$UBOOT_TREE/$CONFIGS/$EZYNQ/*")

do

  LINK=$(echo $SRC | sed "s:^$UBOOT_TREE/::")

  #echo "$SRC | $LINK"

  if [ ! -h $LINK ]; then

    ln -s -S $SUFFIX $SRC $LINK

  fi

done

echo "Step 4: Creating initenv script"

if [ -f $INITENV ]; then

    read -p "Overwrite initenv? (y/n) " yn

    if [ ! $yn = "y" ]; then

      OVERWRITE_INITENV=0;

    fi

fi

if [ $OVERWRITE_INITENV = 1 ] ; then

  echo "#!/bin/sh

export CROSS_COMPILE=$CROSS_COMPILE

export PATH=$COMPILE_PATH:\$PATH" > $INITENV

  #exec permissions are not required for source

  #chmod +x $INITENV 

fi

if [ ! -d $COMPILE_PATH ] ; then

  echo "  WARNING: Please edit initenv accordingly to your cross compiler path"

fi

echo "DONE"

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