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#!/bin/bash
FETCH_SCRIPT="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")/fetch.sh"
if ! cd "$1"; then
echo "$1 does not exist." >&2
exit 1
fi
if [[ ! -e net/Kconfig ]]; then
echo "You must specify the location of kernel sources as the first argument." >&2
exit 1
fi
if ! [[ $(< Makefile) =~ VERSION[[:space:]]*=[[:space:]]*([0-9]+).*PATCHLEVEL[[:space:]]*=[[:space:]]*([0-9]+).*SUBLEVEL[[:space:]]*=[[:space:]]*([0-9]+) ]]; then
echo "Unable to parse kernel Makefile." >&2
exit 1
fi
if (( ((${BASH_REMATCH[1]} * 65536) + (${BASH_REMATCH[2]} * 256) + ${BASH_REMATCH[3]}) < ((3 * 65536) + (10 * 256) + 0) )); then
echo "WireGuard requires kernels >= 3.10. This is kernel ${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.${BASH_REMATCH[3]}."
exit 77
fi
[[ $(< net/Makefile) == *wireguard* ]] || sed -i "/^obj-\\\$(CONFIG_NETFILTER).*+=/a obj-\$(CONFIG_WIREGUARD) += wireguard/" net/Makefile
[[ $(< net/Kconfig) == *wireguard* ]] || sed -i "/^if INET\$/a source \"net/wireguard/Kconfig\"" net/Kconfig
[[ -f net/.gitignore && $(< net/.gitignore) == *wireguard* ]] || echo "wireguard/" >> net/.gitignore
cp "$FETCH_SCRIPT" scripts/fetch-latest-wireguard.sh
chmod +x scripts/fetch-latest-wireguard.sh
[[ $(< scripts/Kbuild.include) == *fetch-latest-wireguard.sh* ]] || echo '$(shell cd "$(srctree)" && ./scripts/fetch-latest-wireguard.sh)' >> scripts/Kbuild.include
if [[ -d .git ]]; then
if [[ $WG_PATCHER_GIT_IGNORE -eq 1 ]]; then
echo -e 'scripts/fetch-latest-wireguard.sh\nnet/.gitignore' >> .gitignore
git update-index --assume-unchanged .gitignore scripts/Kbuild.include net/Kconfig net/Makefile
else
git add scripts/Kbuild.include scripts/fetch-latest-wireguard.sh net/.gitignore net/Kconfig net/Makefile
git commit -s -m "net/wireguard: add wireguard importer" scripts/Kbuild.include scripts/fetch-latest-wireguard.sh net/.gitignore net/Kconfig net/Makefile
fi
fi
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