Script to generate gpg keys quickly

quick-gen-gpg-keys.bash

echo "This script generates GPG keys valid for 1 year for macOS, Linux, and WSL2 users automatically. The email attached to the resulting key will only be valid if you have an garden.io email domain with a local-part of your first name."
if [ "Darwin" = $(uname) ]; then
    FULLNAME=$(id -P $USER | awk -F '[:]' '{print $8}')
    EMAIL=$(id -P "$USER" | cut -d: -f5 | cut -d, -f1 | sed s/'\w*$'// | tr '[:upper:]' '[:lower:]' | tr -d '[:space:]' | sed 's/$/@garden.io/')
else
    FULLNAME=$(getent passwd $USER | cut -d: -f5 | cut -d, -f1)
    EMAIL=$(getent passwd "$USER" | cut -d: -f5 | cut -d, -f1 | sed s/'\w*$'// | tr '[:upper:]' '[:lower:]' | tr -d '[:space:]' | sed 's/$/@garden.io/')
fi
gpg --batch --passphrase '' \
    --quick-generate-key "$FULLNAME <$EMAIL>" ed25519 cert 1y

FPR=$(gpg --list-options show-only-fpr-mbox --list-secret-keys | awk '{print $1}')

gpg --batch --passphrase '' \
    --quick-add-key $FPR ed25519 sign 1y
gpg --batch --passphrase '' \
    --quick-add-key $FPR cv25519 encrypt 1y
gpg --batch --passphrase '' \
    --quick-add-key $FPR ed25519 auth 1y
sleep 1
gpg --armor --export > $HOME/gpgpubkey.txt
echo "\
unset SSH_AGENT_PID
if [ "${gnupg_SSH_AUTH_SOCK_by:-0}" -ne $$ ]; then
  export SSH_AUTH_SOCK="$(gpgconf --list-dirs agent-ssh-socket)"
fi
export GPG_TTY=$(tty)
gpg-connect-agent updatestartuptty /bye >/dev/null" >> $HOME/.bashrc
source $HOME/.bashrc
gpg --export-ssh-key $EMAIL > $HOME/sshpubkey.txt
# Add auth subkey keygrip to sshcontrol
gpg --list-keys --with-keygrip | tail -2 | awk '{print $NF}' >> $HOME/.gnupg/sshcontrol
ssh-add -l