Gem Scaffolder Scripts

Executable shell scripts for creating and managing Ruby gems.

Scripts

create_gem.sh

Create a new Ruby gem with best practices.

# Interactive (uses defaults)
./create_gem.sh my_gem

# With RSpec and MIT license
./create_gem.sh my_gem --test=rspec --mit

# With Minitest and Apache license
./create_gem.sh my_gem --test=minitest --apache

# With GitHub Actions CI
./create_gem.sh my_gem --ci=github

# With Code of Conduct
./create_gem.sh my_gem --coc

# All options
./create_gem.sh my_gem --test=rspec --mit --ci=github --coc

Options:

--test=rspec|minitest - Test framework (default: rspec)
--mit|--apache|--gpl - License (default: mit)
--ci=github|circle - CI provider
--coc - Add Code of Conduct

Creates:

my_gem/
├── .github/workflows/ci.yml
├── lib/
│   ├── my_gem/version.rb
│   └── my_gem.rb
├── spec/
├── Gemfile
├── Rakefile
└── my_gem.gemspec

add_gem_class.sh

Add a new class to an existing gem with test.

./add_gem_class.sh my_gem Parser

Creates:

lib/my_gem/parser.rb - Class file with template
spec/my_gem/parser_spec.rb - RSpec test template

Features:

Follows frozen_string_literal convention
Proper module namespacing
Basic class structure with private attr_reader
Matching spec file with describe blocks
Reminder to require in main file

Example Workflow

# 1. Create new gem
./create_gem.sh data_parser --test=rspec --mit --ci=github

# 2. Navigate to gem
cd data_parser

# 3. Add a Parser class
../add_gem_class.sh data_parser Parser

# 4. Add a Formatter class
../add_gem_class.sh data_parser Formatter

# 5. Install dependencies
bundle install

# 6. Run tests
bundle exec rake spec

Templates

Both scripts use POODR-compliant templates:

Dependency injection via initialize
Private attr_readers
Clear public/private interfaces
Frozen string literals
Proper RSpec structure

Requirements

bundler gem installed
git (for gem creation)