Script to download, verify (sha256sum), uncompress and prepare a Linux kernel source tarball.

get-kernel-patch.sh

#!/bin/sh

# Copyright © 2016 Antonio Hernández Blas <hba.nihilismus@gmail.com>
# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://www.wtfpl.net/ for more details.

me=$(basename $0)

mayor_version=$(echo $1 | cut -d '.' -f 1)
minor_version=$(echo $1 | cut -d '.' -f 2)
bugfix_version=$(echo $1 | cut -d '.' -f 3 | sed 's/-.*//')
newfix_version=$(echo $1 | sed 's/.*-//')

old_version=${mayor_version}.${minor_version}.${bugfix_version}
new_version=${mayor_version}.${minor_version}.${newfix_version}

old_source=linux-${mayor_version}.${minor_version}.${bugfix_version}
new_source=linux-${mayor_version}.${minor_version}.${newfix_version}

patch_name=patch-$1

if [ "${old_source}" = "linux-" ]; then
  echo "  $me: Error, version must be specified, example: 3.18.13-14"
  exit 1
fi

if ! $(echo $1 | grep -q '\-'); then
  echo "  $me: Error, version must be *corrrectly* specified, example: 3.18.13-14"
  exit 1
fi

if [ ! -d "${old_source}" ]; then
  echo "  $me: Error, directory '"${old_source}"' does not exists"
  exit 1
fi

if [ -d "${new_source}" ]; then
  echo "  $me: Error, directory '"${new_source}"' already exists"
  exit 1
fi

set -u
set -e
set -x

wget -c https://cdn.kernel.org/pub/linux/kernel/v${mayor_version}.x/incr/${patch_name}.xz && \
  wget -c https://cdn.kernel.org/pub/linux/kernel/v${mayor_version}.x/incr/sha256sums.asc -O sha256sums.asc && \
    grep -a ${patch_name}.xz sha256sums.asc > ${patch_name}.xz.sha256 && \
      sha256sum -c ${patch_name}.xz.sha256 && \
        rm sha256sums.asc && \
          cp -rf ${old_source} ${new_source} && \
            xzcat ${patch_name}.xz > ${new_source}/${patch_name}.diff && \
              cd ${new_source} && \
                patch -p1 < ${patch_name}.diff && \
                  make oldconfig

get-kernel-releases.sh

#!/bin/sh

# Copyright © 2016 Antonio Hernández Blas <hba.nihilismus@gmail.com>
# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://www.wtfpl.net/ for more details.

me=$(basename $0)
source="https://www.kernel.org"

identify_release() {
  while read release; do
    if $(echo "$(uname -r)" | grep -qE "^${release}"); then
       echo "**  ${release}"
       continue
    fi
    echo "    ${release}"
  done
  echo "**  $(uname -r)"
}

set -u
set -e

wget -o /dev/null ${source} -O - | \
  grep '<td><strong>' | \
    grep '</strong></td>' | \
      sed 's:.*<td><strong>::' | \
         sed 's:</strong></td>.*::' | \
           sed 's: .*$::' | \
             sed 's:^:  :' | \
               identify_release

get-kernel-src.sh

#!/bin/sh

# Copyright © 2015 Antonio Hernández Blas <hba.nihilismus@gmail.com>
# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://www.wtfpl.net/ for more details.

me=$(basename $0)
version=$1
mainline=$(echo $1 | cut -d '.' -f 1)

if [ -z "${version}" ]; then
  echo "  $me: Error, version must be specified. Example: 3.18.13"
  exit 1
fi

set -u
set -e
set -x

wget -c https://www.kernel.org/pub/linux/kernel/v${mainline}.x/linux-${version}.tar.xz && \
  wget -c https://www.kernel.org/pub/linux/kernel/v${mainline}.x/sha256sums.asc && \
    grep "\-${version}.tar.xz" sha256sums.asc > linux-${version}.tar.xz.sha256 && \
      sha256sum -c linux-${version}.tar.xz.sha256 && \
        rm sha256sums.asc && \
          tar xf linux-${version}.tar.xz && \
            cat /boot/config > linux-${version}/.config && \
              cd linux-${version} && \
                make oldconfig