moddep

#!/bin/bash

outdir="$1"

if test -z "$outdir";then
  echo "Usage: $0 outdir [-r \"missing_ok module list ...\"] [modules...]"
  exit 1
fi

shift

test "x$1" != "x-r" || {
  missing_ok="$2"
  shift 2
}


: ${KVERS:=${KVERS:-$(uname -r)}}
: ${MODDIR:=${MODDIR:-/lib/modules/$KVERS}}
: ${MODDIR_OUT:=$outdir/lib/modules/$KVERS}

trap "exit 1" USR1

list_new_nondup() {
  local have_list="$1" have new_list new
  shift
  for new;do
    for have in $have_list;do
      if test "z$new" = "z$have";then
        new=""
        break
      fi
    done
    if test -n "$new";then
      new_list="${new_list:+$new_list }$new"
      have_list="${have_list:+$have_list }$new"
    fi
  done
  echo $new_list
}

get_deps() {
  modinfo -F depends $@ | sed -e 's/,/ /g'
}

to_filenames() {
  local pat name n=0 found not_found names
  for name;do
    if test -z "${name#*.ko}" -o -z "${name#*.ko.xz}";then echo $name;else
      names="${names:+$names }$name"
    fi
  done
  if test -n "$names";then
    found="$(grep -E "/($(echo $names | sed -e 's/ /|/g' -e 's/[_-]/[_-]/g'))\\.ko(\.xz)?:" "$MODDIR/modules.dep" | cut -f1 -d:)"
    not_found="$(echo $names | sed -e 's/ /\n/g' | grep -vE "($(echo $found | sed -e 's@[^ ]*/@@g' -e 's/\.ko\(\.xz\)\?//g' -e 's/ /|/g' -e 's/[_-]/[_-]/g'))")"
    test -z "$not_found" || {
      not_found="$(list_new_nondup "$missing_ok" $not_found)"
    }
    test -z "$not_found" || {
      echo "ERROR: not found:" $not_found >&2
      kill -10 $$
    }
    echo $found | sed -e 's@\(^\| \)\([^/]\)@\1'"$MODDIR"'/\2@g'
  fi
}

strip_path_prefix() {
  local prefix="$1" without_prefix tmp
  shift
  for fname;do
    without_prefix="${fname#$prefix}"
    while test "x$without_prefix" != "x${without_prefix#/*}";do
      without_prefix="${without_prefix#/*}"
    done
    echo "$without_prefix"
  done
}
add_builtin_to_missing_ok() {
  local mod
  for mod in $(sed -e 's@.*/@@' -e 's@\.ko\(\.xz\)\?$@@' $MODDIR/modules.builtin);do
    missing_ok="${missing_ok:+$missing_ok }$mod"
  done
}

test ! -e "$MODDIR/modules.builtin" || add_builtin_to_missing_ok

resolv_list="$(to_filenames $@)"
copy_list="$resolv_list"
while test -n "$resolv_list";do
  resolv_list="$(list_new_nondup "$copy_list" $(to_filenames $(get_deps $resolv_list)))"
  copy_list="$copy_list $resolv_list"
done

test -e "$outdir" || mkdir -p "$outdir"

for firmware in $(modinfo -F firmware $copy_list);do
  fw_file="/lib/firmware/$firmware"
  if test -e "$fw_file";then
    fw_list="${fw_list:+$fw_list }$(list_new_nondup "$fw_list" $fw_file)"
  else
    echo "WARN: missing firmware: $firmware" >&2
  fi
done

mkdir -p "$MODDIR_OUT"
(cd "$MODDIR"; tar c $(strip_path_prefix "$MODDIR" $copy_list)) | tar xv -C "$MODDIR_OUT"
test -z "$fw_list" || cp -v --parents $fw_list "$outdir"
depmod -b $outdir $KVERS