kflavour

#!/bin/bash -efu

shopt -s extglob
V() { echo "- $*" >&2; "$@"; }

   RED=$'\e[1;31m'
 GREEN=$'\e[1;32m'
YELLOW=$'\e[1;33m'
  NORM=$'\e[m'

br=$(git branch --show-current)

unset tagging
if [ "${1-}" = --tag ]; then
	tagging=y
	shift
fi
if [ -n "$*" ]; then
	fvnew="$*"
else
	branch=${br#*/}
	brflvr=${br%/*}
	case $branch in
		sisyphus|p[1-9]*|c[1-9]*) ;;
		*) echo >&2 "Invalid repo $branch"; exit 1 ;;
	esac
	case $brflvr in
		un-def|std-def|std-pae|std-debug|next|rt|+([[:digit:]]).+([[:digit:]])) ;;
		*) echo >&2 "Invalid flavour $brflvr"; exit 1 ;;
	esac

	top=$(git rev-parse --show-toplevel)
	rtbr=$(cut -d' ' -f1 "$top/.gear/release-targets")
	if [ "$rtbr" != "$branch" ]; then
		echo >&2 "${RED}Warning: Branch from .gear/release-targets ($rtbr) != $branch${NORM}"
	fi

	rtfv=$(cut -d' ' -f2 "$top/.gear/release-targets")
	if [ "$brflvr" = "next" ]; then
		fvnew=$rtfv
	else
		if [ "$rtfv" != "$brflvr" ]; then
			echo >&2 "${RED}Warning: flavour from .gear/release-targets ($rtfv) != $brflvr${NORM}"
		fi
		fvnew=$brflvr
	fi
fi
fvold=$(git config gear.specsubst.kflavour)
if [ "$fvold" = "$fvnew" ]; then
	echo >&2 "${GREEN}Flavour is already $fvold${NORM}"
else
	echo >&2 "${YELLOW}Changing flavour $fvold -> $fvnew${NORM}"
	git config gear.specsubst.kflavour "$fvnew"
fi
git config format.subjectPrefix "PATCH $br"

if [ -v tagging ]; then
	tags=$(git tag --points-at @ "kernel-image-$fvnew-*")
	if [ -n "$tags" ]; then
		echo >&2 "Already have tags for flavour $fvnew: ${GREEN}$tags${NORM}"
	else
		(set -x; kernel-tag "$fvnew")
	fi
fi