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#!/bin/bash
GENPATCHES_URL="git://git.gentoo.org/proj/linux-patches.git"
KERNEL_BASE_URL="https://www.kernel.org/pub/linux/kernel/v3.x"
KERENL_INCR_URL="${KERNEL_BASE_URL}/incr"
usage() {
echo "Usage: $0 n [m]."
echo
echo "When called from within a branch N of the linux-patches repo,"
echo "get-patch will download patch-N.n-(n+1).xz from kernel.org"
echo "and rename it to 100n_linux-N-(n+1).patch for inclusion in"
echo "the genpatches patchset."
echo
echo "If a range 'n m' is given, then that range of patches will"
echo "be downloaded. get-patch expects n < m."
echo
exit 1
}
error_branch() {
echo "Could not detect your branch. get-patch expects you to be"
echo "in a branch of $LINUX_PATCHES_URL"
echo
exit 4
}
error_download() {
echo "Couldn't download $1, bailing out!"
echo
rm -f $2
exit 5
}
warning_exists() {
echo "Warning, $1 alreay exists, not downloading."
echo "If you want to download it again, remove the current file."
echo
}
alert_downloaded() {
echo "Downloaded: $1"
echo
}
[[ "$1" == "-h" || "$1" == "--help" ]] && usage 0
[[ -z "$1" ]] && usage 1
[[ ! -z "$3" ]] && usage 2
[[ ! -z "$2" && $1 -ge $2 ]] && usage 3
version=$(git rev-parse --abbrev-ref HEAD)
[[ -z "$version" ]] && error_branch
[[ -z "$2" ]] && limit=$(expr $1 + 1) || limit=$2
for i in $(seq $1 $(expr $limit - 1)) ; do
if [[ $i -eq 0 ]]; then
front=100
GET="${KERNEL_BASE_URL}/patch-${version}.1.xz"
else
if [[ $i -lt 10 ]] ; then
front=100
else
front=10
fi
GET="${KERENL_INCR_URL}/patch-${version}.$i-$(expr $i + 1).xz"
fi
SAVE="${front}${i}_linux-${version}.$(expr $i + 1).patch"
[[ -f "${SAVE}" ]] && warning_exists "${SAVE}" && continue
wget "${GET}" -O "${SAVE}.xz" >/dev/null 2>&1
[[ $? -ne 0 ]] && error_download "${GET}" "${SAVE}.xz" || alert_downloaded "${SAVE}"
xz -d "${SAVE}.xz"
done
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