How to add DEBIAN_FRONTEND=noninteractive in sudoers.d file?

I am automating dpkg-sig installation for one of my project purpose. Now I want to install it noninteractive way.

I have added the following in a file inside /etc/sudoers.d/

Cmnd_Alias DPKGSIG_INSTALL = /usr/bin/apt install -y dpkg-sig, \
                            /bin/apt install -y dpkg-sig
abc ALL=(root) NOPASSWD: DPKGSIG_INSTALL
Defaults:abc !requiretty

I am trying to install dpkg-sig using my golang code like this:

installDpkgSig := "/usr/bin/sudo DEBIAN_FRONTEND=noninteractive apt install -o Dpkg::Options::=--force-confold -y dpkg-sig"
executor.cmd = *exec.Command("bash", "-c", installDpkgSig)

It is not able to install it. Getting the following error:

sudo: sorry, you are not allowed to set the following environment variables: DEBIAN_FRONTEND

But when I remove DEBIAN_FRONTEND=noninteractive part from the installation command, it is working fine. How can run the installation noninteractive way?

Solution

No need to involve Bash (it might even open up for more bugs); just set the environment variable for the command:

cmd := exec.Command("sudo", "apt-get", "install", "-o", "Dpkg::Options::=--force-confold", "-y", "dpkg-sig")
cmd.Env = append(os.Environ(), "DEBIAN_FRONTEND=noninteractive")
err := cmd.Run()

^{(Also, use apt-get, not apt, for non-interactive tasks.)}