#!/bin/bash

version=$1

source='a'

target='b'

[ -z "${version}" ] && read -p 'version: ' version

[ -f "v${version}.tar.gz" ] && tar -xzf v${version}.tar.gz

[ -f "netdata-${version}.tar.gz" ] && tar -xzf netdata-${version}.tar.gz

[ -d a ] && rm -rf a

[ -d b ] && rm -rf b

if [ -d "netdata-${version}" ]

then

    mv netdata-${version} a

elif [ -d "netdata-v${version}" ]

then

    mv netdata-v${version} a

else

  echo "Error: Archive is not extracted or archive is corrupted"

  exit 1

fi

cp -a a b

pushd ${target}

for script in $(grep -R '/usr/bin/env bash' * | cut -d ':' -f1) $(grep -R '/usr/bin/env sh' * | cut -d ':' -f1)

do

  [ "$(basename ${script})" == "README.md" ] && continue

  echo ${script}

  sed -i -e '1s^env bash^bash^' -e '1s^env sh^sh^' ${script}

done

for script in $(grep -R '/usr/bin/env python' * | cut -d ':' -f1)

do

  [ "$(basename ${script})" == "README.md" ] && continue

  echo ${script}

  if [ "$(basename ${script})" == "boinc_client.py" ]

  then

    sed -i -e '1s^!/usr/bin/env python^^' ${script}

  else

    sed -i -e '1s^env python^python3^' ${script}

  fi

done

popd

cat << EOF > netdata-fix-shebang-${version}.patch

Fix shebang according to

https://docs.fedoraproject.org/en-US/packaging-guidelines/#_shebang_lines

EOF

patchver=$(echo ${version} | cut -d- -f1)

diff -rup a b >> netdata-fix-shebang-${patchver}.patch

#sed -e 's^/usr/bin/sh^/bin/sh^' -e 's^/usr/bin/bash^/bin/bash^' netdata-fix-shebang-${patchver}.patch > netdata-fix-shebang-${patchver}.el6.patch

rm -rf a b