1.InstallGo.sh

#!/bin/sh

echo "======================================"
echo "  Step 1: Installing Go 1.21.7      "
echo "======================================"

# Step 1: Download Go 1.21.7
echo "1. Downloading Go 1.21.7..."
wget https://dl.google.com/go/go1.21.7.linux-amd64.tar.gz
if [ $? -ne 0 ]; then
    echo "❌ Failed to download Go. Exiting."
    exit 1
else
    echo "✅ Go 1.21.7 downloaded successfully."
fi

# Step 2: Extract the Go tarball
echo "2. Extracting Go..."
sudo tar -xvf go1.21.7.linux-amd64.tar.gz
if [ $? -ne 0 ]; then
    echo "❌ Failed to extract Go. Exiting."
    exit 1
else
    echo "✅ Go extracted successfully."
fi

# Step 3: Move Go to /usr/local
echo "3. Copying Go to /usr/local..."
sudo cp -R go /usr/local
if [ $? -ne 0 ]; then
    echo "❌ Failed to copy Go to /usr/local. Exiting."
    exit 1
else
    echo "✅ Go copied to /usr/local successfully."
fi

# Step 4: Change ownership of Go directory
echo "4. Changing ownership of Go directory..."
sudo chown $USER:$USER -R /usr/local/go
if [ $? -ne 0 ]; then
    echo "❌ Failed to change ownership. Exiting."
    exit 1
else
    echo "✅ Ownership changed successfully."
fi

# Step 5: Add or verify environment variables in ~/.profile
echo "5. Verifying and updating environment variables in ~/.profile..."
update_profile=false

check_and_add_env_var() {
    VAR_NAME=$1
    VAR_VALUE=$2
    if grep -q "^export $VAR_NAME=" ~/.profile; then
        CURRENT_VALUE=$(grep "^export $VAR_NAME=" ~/.profile | cut -d'=' -f2- | tr -d '"')
        if [ "$CURRENT_VALUE" != "$VAR_VALUE" ]; then
            sed -i "s|^export $VAR_NAME=.*|export $VAR_NAME=$VAR_VALUE|" ~/.profile
            echo "Updated $VAR_NAME to $VAR_VALUE in ~/.profile"
            update_profile=true
        else
            echo "$VAR_NAME is already set to $VAR_VALUE in ~/.profile. Skipping."
        fi
    else
        echo "export $VAR_NAME=$VAR_VALUE" >> ~/.profile
        echo "Added $VAR_NAME=$VAR_VALUE to ~/.profile"
        update_profile=true
    fi
}

check_and_add_env_var "GOROOT" "/usr/local/go"
check_and_add_env_var "GOPATH" "$HOME/go"
check_and_add_env_var "PATH" "\$GOPATH/bin:\$GOROOT/bin:\$PATH"

if $update_profile; then
    echo "✅ Environment variables updated successfully in ~/.profile."
else
    echo "✅ Environment variables were already correctly set in ~/.profile."
fi

# Step 6: Apply the changes to the current script environment
echo "6. Applying profile changes..."
export GOROOT=/usr/local/go
export GOPATH=$HOME/go
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH

# Step 7: Verify Go version
echo "7. Verifying Go installation..."
go version
if [ $? -ne 0 ]; then
    echo "❌ Go version check failed. Exiting."
    exit 1
else
    echo "✅ Go installed and verified successfully."
fi

echo "======================================"
echo "✅ Go 1.21.7 installed and configured!"
echo "======================================"