# Extract a key from a plain command output
#
# example: yunohost user info tata --output-as plain | ynh_get_plain_key mail
#
# usage: ynh_get_plain_key key [subkey [subsubkey ...]]
# | ret: string - the key's value
ynh_get_plain_key() {
    prefix="#"
    founded=0
    key=$1
    shift
    while read line; do
        if [[ "$founded" == "1" ]] ; then
            [[ "$line" =~ ^${prefix}[^#] ]] && return
            echo $line
        elif [[ "$line" =~ ^${prefix}${key}$ ]]; then
            if [[ -n "${1:-}" ]]; then
                prefix+="#"
                key=$1
                shift
            else
                founded=1
            fi
        fi
    done
}