ssh_key_tools.sh

#!/bin/bash

# Ask the user for their key type
echo Which type of key you want to generate? Please select from [rsa, ed25519]

read keyType

echo Please enter your email

read email

# Ask user with which they want to tag the new key
echo Please provide a hostname which you want to use for this key

read hostname

echo Please provide your github username

read username

echo Please provide your repository name

read repositoryname

if [ $keyType = "rsa" ]
then
	eval "ssh-keygen -t rsa -b 4096 -C $email"
elif [ $keyType = "ed25519" ]
then
	eval "ssh-keygen -t ed25519 -C $email"
else
   echo "Please enter system type from the above list"
   return
fi

echo "------------------------------------------------------"
echo "Your ssh key got generated in your home .ssh directory"
echo "------------------------------------------------------\n"

echo "Adding you ssh key to ssh-agent...."

eval "$(ssh-agent -s)"
echo "\n"

if [ -f ~/.ssh/config ]
then
	echo "Config file found.\n"
	echo "Adding github host to existing ssh config file..."
	echo "\n\n\nHost $hostname\nHostname github.com\nAddKeysToAgent yes\nUseKeychain yes\nIdentityFile ~/.ssh/id_$keyType\nIdentitiesOnly yes" >> ~/.ssh/config
else
	echo "\nCreating a new ssh config file..."
	eval "touch ~/.ssh/config"
	echo "\n"
	echo "Adding github host to new ssh config file..."
	echo "Host *.github.com\nAddKeysToAgent yes\nUseKeychain yes\nIdentityFile ~/.ssh/id_$keyType" >> ~/.ssh/config
fi
	
echo "Adding new ssh key to ssh agent...\n"
eval "ssh-add -K ~/.ssh/id_$keyType"

echo "Key got added!!! Now copy the public key from below and add to your github.\n\n"
echo "Your new ssh public key:"
eval "cat ~/.ssh/id_$keyType.pub"

echo "\n Now update your project .git/config file url key with below url:"
echo "git@$hostname:$username/$repositoryname.git"