add additional packages from a list to openwrt .config

set-packages-openwrt.sh

#!/bin/bash
# add additional packages from a list to openwrt .config
# its a good idea to run `make defconfig` afterwards

file="$1"
config="$2"

_testexist(){
        # _testexist [file path] [type of file]
        path="$1"
        filetype="$2"
        if [[ ! -f "$path" ]]; then
                echo "ERROR: Cannot access $filetype \`$path'"
                echo
                echo "USAGE: $0 [packages] [config]"
                exit 1
        fi
}

_testexist "$file" "packages"
_testexist "$config" "config"

cp -v "$config" "${config}.bak"

while IFS= read line; do
        package="CONFIG_PACKAGE_$line"
        notSet="# $package is not set"
        setYes="${package}=y"

        if [[ ! -z $(grep "$notSet" "$config") ]]; then
                echo -e "[+] Setting =y for :\t$package"
                sed -i -e "s/$notSet/$setYes/g" "$config"
        elif [[ ! -z $(grep "$setYes" "$config") ]]; then
                echo -e "[=] Already set for:\t$package"
        else
                echo -e "[!] Did not find   :\t$package"
        fi
done <"$file"