user.eclass: Fix egetgroups bash compliance, and make it simpler

Signed-off-by: Michał Górny <mgorny@gentoo.org>

diff --git a/eclass/user.eclass b/eclass/user.eclass
index fdf98caa6099196d9c3688b8f0920fcf3d5622eb..9dc15fa75d23da510ae0b3e7c485802582199930 100644 (file)
--- a/eclass/user.eclass
+++ b/eclass/user.eclass
@@ -445,11 +445,12 @@ egetgroups() {
        local egroups_arr
        read -r -a egroups_arr < <(id -G -n "$1")
 
-       local defgroup=${egroups_arr[0]}
+       local g groups=${egroups_arr[0]}
        # sort supplementary groups to make comparison possible
-       readarray -t exgroups_arr < <(printf '%s\n' "${egroups_arr[@]:1}" | sort)
-       local exgroups=${exgroups_arr[*]}
-       echo "${defgroup}${exgroups:+,${exgroups// /,}}"
+       while read -r g; do
+               [[ -n ${g} ]] && groups+=",${g}"
+       done < <(printf '%s\n' "${egroups_arr[@]:1}" | sort)
+       echo "${groups}"
 }
 
 # @FUNCTION: esethome