generate_CODEOWNERS.sh

#!/bin/bash

SRC="$(realpath "${BASH_SOURCE%/*}/../")"

# Maintainers flagged inactive (one GitHub username per line) are dropped from
# CODEOWNERS so they aren't review-requested on PRs touching "their" code — they
# stay listed in each board's BOARD_MAINTAINER. The sync workflow writes this file
# from the contacts DB's Days_since_last_activity; absent/unset => no filtering.
declare -A INACTIVE
if [[ -n "${INACTIVE_MAINTAINERS_FILE:-}" && -f "${INACTIVE_MAINTAINERS_FILE}" ]]; then
	while read -r _u; do _u="${_u#@}"; [[ -n "$_u" ]] && INACTIVE["$_u"]=1; done < "${INACTIVE_MAINTAINERS_FILE}"
fi

# Dummy function for successful source
function display_alert() { :; }
function enable_extension() { :; }
function add_packages_to_image() { :; }

function run_hook() {
	local hook_point="$1"
	while read -r hook_point_function; do
		"${hook_point_function}"
	done < <(compgen -A function | grep "^${hook_point}__" | LC_ALL=C.UTF-8 sort)
}

# $1: board config
function generate_for_board() {
	local board_config="$1"
	(
		BOARD="${board_config%.*}"
		source "${SRC}/config/boards/${board_config}"

		LINUXFAMILY="${BOARDFAMILY}"

		[[ -n "${BOARD_MAINTAINER}" ]] || return
		# CODEOWNERS owners = ACTIVE maintainers only — drop any flagged inactive so
		# they aren't pinged (BOARD_MAINTAINER above keeps the full list untouched).
		local _m maintainers=""
		for _m in ${BOARD_MAINTAINER}; do
			[[ -n "${INACTIVE[$_m]:-}" ]] || maintainers+="@${_m} "
		done
		maintainers="${maintainers% }"
		# all maintainers inactive -> emit no entry (the path simply gets no owner)
		[[ -n "${maintainers}" ]] || return

		while read -r BRANCH; do
			(
				source "${SRC}/config/sources/families/${LINUXFAMILY}.conf"
				source "${SRC}/config/sources/common.conf"
				source "${SRC}/config/sources/${ARCH}.conf"

				run_hook "post_family_config"
				run_hook "post_family_config_branch_${BRANCH,,}"

				[[ -z $LINUXCONFIG ]] && LINUXCONFIG="linux-${LINUXFAMILY}-${BRANCH}"
				[[ -z $KERNELPATCHDIR ]] && KERNELPATCHDIR="archive/${LINUXFAMILY}-${KERNEL_MAJOR_MINOR}"
				[[ -z $BOOTPATCHDIR ]] && BOOTPATCHDIR="u-boot-${LINUXFAMILY}"
				[[ -z $ATFPATCHDIR ]] && ATFPATCHDIR="atf-${LINUXFAMILY}"

				cat <<-EOF
					config/boards/${board_config}			${maintainers}
					config/kernel/${LINUXCONFIG%-*}-*.config	${maintainers}
					sources/families/${BOARDFAMILY}.conf		${maintainers}
					patch/kernel/${KERNELPATCHDIR%-*}-*/		${maintainers}
				EOF

				local patch_archive="$(readlink "patch/kernel/${KERNELPATCHDIR}" || true)"
				if [[ -n "${patch_archive}" ]]; then
					patch_archive="${patch_archive%/}"
					echo "patch/kernel/${patch_archive%-*}-*/	${maintainers}"
				fi

				if [[ -n "${BOOTCONFIG}" && "${BOOTCONFIG}" != "none" ]]; then
					while read -r d; do
						echo "patch/u-boot/${d}/		${maintainers}"
					done < <(echo "${BOOTPATCHDIR}" | xargs -n1)
				fi

				if [[ -n "${ATFSOURCE}" && "${ATFSOURCE}" != "none" ]]; then
					echo "patch/atf/${ATFPATCHDIR}/			${maintainers}"
				fi
			)
		done < <(echo "${KERNEL_TARGET}" | tr ',' '\n')
	)
}

function generate_for_all_board() {
	local board_config
	while read -r board_config; do
		local type="${board_config##*.}"
		[[ "conf wip csc eos tvb" == *"${type}"* ]] || continue

		generate_for_board "${board_config}"
	done < <(ls "${SRC}/config/boards/")
}

function merge() {
	local line
	declare -A codeowners
	while read -r line; do
		local file="$(echo "${line}" | tr -s '[:space:]' ' ' | cut -d' ' -f1)"
		local maintainers="$(echo "${line}" | tr -s '[:space:]' ' ' | cut -d' ' -f2-)"
		codeowners["$file"]+=" ${maintainers}"
	done

	local file
	while read -r file; do
		declare -a maintainers
		readarray -t maintainers < <(echo "${codeowners["$file"]}" | xargs -n1 | LC_ALL=C.UTF-8 sort -u)
		echo "${file}		${maintainers[*]}"
	done < <(printf "%s\n" "${!codeowners[@]}" | LC_ALL=C.UTF-8 sort)
}

cat <<-EOF >"${SRC}/.github/CODEOWNERS"
	# PLEASE DON'T EDIT THIS FILE
	# Auto generated by ".github/generate_CODEOWNERS.sh"

	# The following contents are generated by board configs
	$(generate_for_all_board | merge)
EOF