Create ssh key, copy to clipboard, add config. Usage: create-ssh-key <keyname> <hostname> <username> <port if not 22>

create-ssh-key.sh

create-ssh-key() {
  if [ "$#" -eq 0 ]; then

    cat <<EOF
    Create ssh key, copy to clipboard, add config.
Usage:
  create-ssh-key <keyname> <hostname> <username> <port if not 22>
EOF
  return 1

  fi

  local keyname=$1
  local hostname=$2
  local username=$3
  local port=$4

  : "${keyname:=keyname}"
  : "${hostname:=hostname}"
  : "${username:=username}"
  : "${port:=22}"

  local private_key_path=~/.ssh/$keyname.rsa
  local public_key_path=$private_key_path.pub

 # No comment on public key for privacy
 # Exit imidiately if choose not to overwrite exist key
  ssh-keygen -t rsa -b 4096 -C '' -f $private_key_path || return 1

  # copy public key to clipboard
  if [[ $(command -v clipcopy) ]]; then
    clipcopy $public_key_path && echo 'Public key copied to clipboard'
  else
    echo 'Public key content' && cat $public_key_path
  fi

  # add to config
  cat <<EOF >> ~/.ssh/config
Host $keyname
  User $username
  Hostname $hostname
  Port $port
  IdentityFile $private_key_path

EOF
  echo 'Config added, go edit the ssh config file.'
  vi + ~/.ssh/config

}