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source $stdenv/setup
# When no modules are built, the $out/lib/modules directory will not
# exist. Because the rest of the script assumes it does exist, we
# handle this special case first.
if ! test -d "$kernel/lib/modules"; then
if test -z "$rootModules" || test -n "$allowMissing"; then
mkdir -p "$out"
exit 0
else
echo "Required modules: $rootModules"
echo "Can not derive a closure of kernel modules because no modules were provided."
exit 1
fi
fi
version=$(cd $kernel/lib/modules && ls -d *)
echo "kernel version is $version"
# Determine the dependencies of each root module.
closure=
for module in $rootModules; do
echo "root module: $module"
deps=$(modprobe --config no-config -d $kernel --set-version "$version" --show-depends "$module" \
| sed 's/^insmod //') \
|| if test -z "$allowMissing"; then exit 1; fi
if [[ "$deps" != builtin* ]]; then
closure="$closure $deps"
fi
done
echo "closure:"
mkdir -p $out/lib/modules/"$version"
for module in $closure; do
target=$(echo $module | sed "s^$NIX_STORE.*/lib/modules/^$out/lib/modules/^")
if test -e "$target"; then continue; fi
if test \! -e "$module"; then continue; fi # XXX: to avoid error with "cp builtin builtin"
mkdir -p $(dirname $target)
echo $module
cp $module $target
# If the kernel is compiled with coverage instrumentation, it
# contains the paths of the *.gcda coverage data output files
# (which it doesn't actually use...). Get rid of them to prevent
# the whole kernel from being included in the initrd.
nuke-refs $target
echo $target >> $out/insmod-list
done
mkdir -p $out/lib/firmware
for module in $closure; do
for i in $(modinfo -F firmware $module); do
mkdir -p "$out/lib/firmware/$(dirname "$i")"
echo "firmware for $module: $i"
cp "$firmware/lib/firmware/$i" "$out/lib/firmware/$i" 2>/dev/null || if test -z "$allowMissing"; then exit 1; fi
done
done
depmod -b $out -a $version
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