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# Check whether ebuilds are not installing new, non-Gentoo-ey paths.

# QA check: validate Gentoo's filesystem layout policies
# Maintainer: Portage team <dev-portage@gentoo.org>

gentoo_path_check() {
	# allowed path definitions
	# ------------------------

	# directories common to / and /usr
	local allowed_common_dirs=(
		bin lib lib32 lib64 libx32 sbin
	)

	# toplevel directories which can be installed to by ebuilds
	# /home is not included as no ebuilds should install files there
	local allowed_paths_toplevel=(
		"${allowed_common_dirs[@]}"
		boot dev etc opt srv usr var
	)

	# directories in /usr which can be installed to by ebuilds
	# /usr/games is not included as it is banned nowadays
	local allowed_paths_usr=(
		"${allowed_common_dirs[@]}"
		include libexec share src
		# toolchain stuff
		"${CHOST}" "${CTARGET}"
	)


	# the logic
	# ---------
	local bad_paths=()
	local x

	local shopt_save=$(shopt -p nullglob)
	shopt -s nullglob

	# 1. check for unexpected top-level directories
	local toplevel_dirs=( "${ED%/}"/* )
	for x in "${toplevel_dirs[@]##*/}"; do
		if ! has "${x}" "${allowed_paths_toplevel[@]}"; then
			bad_paths+=( "/${x}" )
		fi
	done

	# 2. check for unexpected /usr subdirectories
	local usr_dirs=( "${ED%/}"/usr/* )
	for x in "${usr_dirs[@]##*/}"; do
		if ! has "${x}" "${allowed_paths_usr[@]}"; then
			bad_paths+=( "/usr/${x}" )
		fi
	done

	# 3. check for unexpected /usr/share/doc subdirectories
	local doc_dirs=( "${ED%/}"/usr/share/doc/* )
	for x in "${doc_dirs[@]##*/}"; do
		if [[ ${x} != ${PF} ]]; then
			bad_paths+=( "/usr/share/doc/${x}" )
		fi
	done

	${shopt_save}

	# report
	# ------
	if [[ -n ${bad_paths[@]} ]]; then
		eqawarn "QA Notice: The ebuild is installing to one or more unexpected paths:"
		eqawarn
		eqatag -v non-gentoo-paths "${bad_paths[@]}"
		eqawarn
		eqawarn "Please fix the ebuild to use correct FHS/Gentoo policy paths."
	fi
}

gentoo_path_check
: # guarantee successful exit

# vim:ft=sh