create-rpi-update-commit

#!/bin/bash -eu
#
# Create an 'Update to upstream raspberrypi ...' commit
#

function usage()
{
	cat <<EOF
Usage: $(basename "${0}") [-h]

Create an 'Update to upstream raspberrypi ...' commit.

Optional arguments:
  -h, --help  Show this help text and exit.
EOF
}

while [ $# -gt 0 ] ; do
	case "$1" in
		-h|--help)
			usage
			exit
			;;
		*)
			echo "Invalid argument: ${1}" >&2
			exit 2
			;;
	esac
	shift
done

commit=$(git log | grep -m1 -P 'from commit [0-9a-f]{40}' | \
			 grep -oP '[0-9a-f]{40}' || true)
if [ -z "${commit}" ] ; then
	echo "No cherry-pick tag found" >&2
	exit 1
fi

tag=$(git tag --points-at "${commit}" 2>/dev/null | grep "^rpi-" | sort -V | \
		  tail -1)
if [ -z "${tag}" ] ; then
	echo "Tag not found for commit ${commit}" >&2
	exit 1
fi

branch=${tag%_*}
date=${tag#*_}

subject=$(git log --format=%s "${commit}" -1)

cat <<EOF > debian.raspi/upstream-raspberrypi
# The following upstream raspberrypi releases have been ported:
[upstream-raspberrypi]:
    ${branch} = ${commit::12} ("${subject}") [${date}]
EOF

git commit -s \
	-m "UBUNTU: raspi: Update to upstream raspberrypi ${branch} (${date})" \
	-m "Ignore: yes" \
	--  debian.raspi/upstream-raspberrypi