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#!/bin/bash
# current directory is /var/lib/dkms/scst-{module}/{scst-version}/build
# $1 is set only in scst-dkms building
build_cache="/var/cache/@_PKGPATH@"
ver="@_PKGVER@"
kvariant="${KVER}-version" # act as bare variant name
kvariant="${kvariant#*-*-*-}" kversion="${KVER%-"${kvariant%-version}"}"
# 8.53.42-arch78-43-ultra-sexy -> /ultra-sexy-version/8.53.42-arch78-43-3.9.0pre1
save_dir="$build_cache/$kvariant/$kversion-$ver"
check_dir="$save_dir"
# extra check for scst modules : if modules need rebuild, assume scst need full rebuild
[[ "$1" ]] && check_dir="$check_dir/dh"
# reduce some race conditions surface on /var/cache and building setup/dependencies
until [[ -d "$check_dir" ]]; do
[[ -e "$save_dir" ]] && rm -fr "$save_dir"
build_dir=.
if [[ -z "$1" ]]; then
build_dir="/var/lib/@_PKGPATH@"
# use same method as dkms itself
cp -a scst/ "$build_dir"
fi
# make 'default' target does not work because default(first) target is not .phony, and is required and already included for other modules
# SCST_INC_DIR is statically defined because of faulty scst/src/Kbuild flags only catching headers in '../include' (default value)
# so Kbuild header files' location have already been overwritten earlier (at Packaging stage)
make -j$(nproc) -sC "$build_dir" all
mkdir -p "$save_dir/dh"
cp "$build_dir"/{*.ko,Module.symvers} "$save_dir/"
cp "$build_dir/dev_handlers"/*.ko "$save_dir/dh/"
make -sC "$build_dir" clean
[[ -z "$1" ]] && rm -fr "$build_dir"
# remove older versions modules of this kvariant (that is not the currently used one)
ls -v1 --zero "$build_cache/$kvariant" | head -zn-1 | \
grep -vZz "$kversion-$ver" | xargs -0 -I {} rm -fr "$build_cache/$kvariant/{}"
done
if [[ -z "$1" ]]; then
cp "$save_dir/Module.symvers" ./scst-Module.symvers
else
mv "$save_dir"/*.ko ./
mv "$save_dir/dh"/*.ko dev_handlers/
rm -fr "$save_dir/dh"
fi
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