nfsexports-setsudoaccess

#!/usr/bin/env bash

#---------------------------------------------------------------------
usage ()
{
	cat <<EOT

${0##*/}
    Script to inject the proper command exceptions into a system's
    /etc/sudoers file to allow vagrant to modify /etc/exports for
    NFS shared folder use without prompting the user for an
    administrator password during \`vagrant up\`.
    See: https://docs.vagrantup.com/v2/synced-folders/nfs.html
    Has no effect if run repeatedly.

Usage:
    bin/${0##*/}


EOT

	exit ${1:-0}  # Exit with code 0 unless an arg is passed to the method.
}
if [ "$1" = '-h' ]; then
	usage
fi

# Make sure only root can run our script
if [[ $EUID -ne 0 ]]; then
   echo "!! This script must be run using sudo." 1>&2
   exit 1
fi

comment="Allow Vagrant with NFS without requiring a password"
if grep -q "$comment" "/etc/sudoers"; then
    echo 'Vagrant permissions already present in /etc/sudoers';
else
    echo 'Adding Vagrant permissions into /etc/sudoers';
    cat <<EOF >> /etc/sudoers

# $comment
Cmnd_Alias VAGRANT_EXPORTS_ADD = /usr/bin/tee -a /etc/exports
Cmnd_Alias VAGRANT_NFSD = /sbin/nfsd restart
Cmnd_Alias VAGRANT_EXPORTS_REMOVE = /usr/bin/sed -E -e /*/ d -ibak /etc/exports
%admin ALL=(root) NOPASSWD: VAGRANT_EXPORTS_ADD, VAGRANT_NFSD, VAGRANT_EXPORTS_REMOVE
EOF
fi