#! /bin/bash

Dir=$1

List=$2

Dest="extra"

# Destination was specified on the command line

test -n "$3" && Dest="$3"

pushd $Dir

rm -rf modnames

find . -name "*.ko" -type f > modnames

# Look through all of the modules, and throw any that have a dependency in

# our list into the list as well.

rm -rf dep.list dep2.list

rm -rf req.list req2.list

touch dep.list req.list

cp "$List" .

# This variable needs to be exported because it is used in sub-script

# executed by xargs

export ListName=$(basename "$List")

# NB: this loop runs 2000+ iterations. Try to be fast.

NPROC=`nproc`

[ -z "$NPROC" ] && NPROC=1

cat modnames | xargs -r -n1 -P $NPROC sh -c '

  dep=$1

  depends=`modinfo $dep | sed -n -e "/^depends/ s/^depends:[ \t]*//p"`

  [ -z "$depends" ] && exit

  for mod in ${depends//,/ }

  do

    match=$(grep "^$mod.ko" "$ListName")

    [ -z "$match" ] && continue

    # check if the module we are looking at is in mod-extra too.

    # if so we do not need to mark the dep as required.

    mod2=${dep##*/}  # same as `basename $dep`, but faster

    match2=$(grep "^$mod2" "$ListName")

    if [ -n "$match2" ]

    then

      #echo $mod2 >> notreq.list

      continue

    fi

    echo $mod.ko >> req.list

  done

' DUMMYARG0   # xargs appends MODNAME, which becomes $dep in the script above

sort -u req.list > req2.list

sort -u "$ListName" > modules2.list

join -v 1 modules2.list req2.list > modules3.list

for mod in $(cat modules3.list)

do

  # get the path for the module

  modpath=`grep /$mod modnames`

  [ -z "$modpath" ] && continue

  echo $modpath >> dep.list

done

sort -u dep.list > dep2.list

# now move the modules into the extra/ directory

for mod in `cat dep2.list`

do

  newpath=`dirname $mod | sed -e "s/kernel\\//$Dest\//"`

  mkdir -p $newpath

  mv $mod $newpath

done

popd

# If we're signing modules, we can't leave the .mod files for the .ko files

# we've moved in .tmp_versions/.  Remove them so the Kbuild 'modules_sign'

# target doesn't try to sign a non-existent file.  This is kinda ugly, but

# so is modules-extra.

for mod in `cat ${Dir}/dep2.list`

do

  modfile=`basename $mod | sed -e 's/.ko/.mod/'`

  rm .tmp_versions/$modfile

done

pushd $Dir

rm modnames dep.list dep2.list req.list req2.list

rm "$ListName" modules2.list modules3.list

popd