switch-npm-account.sh

#!/bin/bash

# How to get auth token:
# 1. Go to https://www.npmjs.com/settings/YOUR_USERNAME/tokens
# 2. Click on "Create New Token"
# 3. Enter the token name and click on "Create Token" -> "Classic Token"
# 4. Select "Publish" and click on "Generate Token"
# 5. Copy the generated token and paste it in the tokens array below

declare -A tokens
tokens=(
    ["work"]="YOUR_WORK_AUTH_TOKEN"
    ["personal"]="YOUR_PERSONAL_AUTH_TOKEN"
    ["another_account"]="YOUR_ANOTHER_ACCOUNT_AUTH_TOKEN"
)

fetch_user() {
    local token=$1

    user_info=$(curl -s -H "Authorization: Bearer $token" https://registry.npmjs.org/-/whoami)
    if [[ $? -ne 0 || -z "$user_info" ]]; then
        echo "Failed to fetch user information."
        exit 1
    fi

    echo $user_info
}

echo "Available accounts:"
index=1
for account in "${!tokens[@]}"; do
    echo "$index) $account"
    account_list[$index]=$account
    ((index++))
done

echo
read -p "Enter the number of the account you want to switch to: " selected_number

if [[ -z "${account_list[$selected_number]}" ]]; then
    echo "Invalid selection!"
    exit 1
fi

selected_account="${account_list[$selected_number]}"
selected_token="${tokens[$selected_account]}"

user_json=$(fetch_user "$selected_token")
user_name=$(echo "$user_json" | jq -r '.username')

echo "//registry.npmjs.org/:_authToken=${selected_token}" > ~/.npmrc

echo
echo "Switched to '$selected_account' account successfully!"
echo "Logged in as: ${user_name}"
echo