Terminal Progress is a Ruby gem that provides elegant progress bars for countable tasks - operations where you know how many items you need to process upfront. Perfect for database seeding, file processing, batch operations, and any task that involves iterating through a known collection.

• Animated Braille Spinner: Beautiful rotating animation that shows your process is actively running
• Dynamic Progress Bar: Automatically adapts to your terminal width with colored progress indicators
• Step-by-Step Labels: Display contextual messages only when needed (first iteration, milestones, etc.)
• Automatic Calculation: Just provide the total count - the gem handles percentage calculations internally
• Clean Completion: Proper cleanup and final status display

✅ Perfect for:

• Processing lists of files, records, or items
• Database seeding operations
• Batch API calls
• Migration scripts
• Any task with a known item count

❌ Not (currently) suitable for:

• File downloads (unknown completion time)
• Streaming data (unknown total size)
• Tasks without a clear "total count"

Add this line to your application's Gemfile:

gem 'terminal-progress', '~> 0.1.0'

And then execute:

bundle install

Or install it globally with:

gem install terminal-progress

require 'terminal-progress'

# Process a collection of items
users = User.all  # 1,000 users
progress = TerminalProgress.new(users.count)

users.each_with_index do |user, index|
  # Do your actual work
  user.send_welcome_email
  
  # Update progress (only show label on first item)
  progress.print_progress(index.zero? ? "Sending welcome emails" : nil)
end

progress.print_complete

Output:

  Sending welcome emails
  ⣯   423/1000: [==================                  ] 

# Seed customers and orders
customers = 500
progress = TerminalProgress.new(customers + 100 + 50)  # Total operations

# Create customers
customers.times do |i|
  Customer.create!(name: "Customer #{i}")
  progress.print_progress(i.zero? ? "Creating customers" : nil)
end

# Create orders
100.times do |i|
  Order.create!(customer: Customer.all.sample)
  progress.print_progress(i.zero? ? "Creating orders" : nil)
end

# Send notifications
50.times do |i|
  send_notification
  progress.print_progress(i.zero? ? "Sending notifications" : nil)
end

progress.print_complete

files = Dir.glob("data/*.csv")
progress = TerminalProgress.new(files.count)

files.each_with_index do |file, index|
  # Process each file
  CSV.foreach(file) { |row| process_row(row) }
  
  progress.print_progress(index.zero? ? "Processing CSV files" : nil)
end

progress.print_complete

• Internal Counter: The gem automatically tracks progress internally - just call print_progress once per item
• Total Count: Provide the total number of items upfront, not a measurement like file size
• Label Strategy: Only pass labels on first iterations to avoid terminal spam
• Thread Safe: The animated spinner runs in its own thread

Creates a new progress bar with the specified maximum count.

Parameters:

• max (Integer): Total number of items to process

Updates the progress bar and optionally displays a message.

Parameters:

• message (String, optional): Label to display above the progress bar

Finalizes the progress bar and cleans up resources. Always call this when finished.

Bug reports and pull requests are welcome on GitHub at our Terminal Progress Repository.

Terminal Progress is available as open-source software under the MIT License.