https://github.com/razum2um/dead_code_terminator

❌ Remove dead conditional branches
https://github.com/razum2um/dead_code_terminator

dead-code-elimination dead-code-removal ruby-parser

Last synced: 27 days ago
JSON representation

❌ Remove dead conditional branches

• Host: GitHub
• URL: https://github.com/razum2um/dead_code_terminator
• Owner: razum2um
• License: mit
• Created: 2021-05-31T04:42:36.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2021-05-31T22:53:56.000Z (over 3 years ago)
• Last Synced: 2024-10-06T04:24:25.648Z (about 1 month ago)
• Topics: dead-code-elimination, dead-code-removal, ruby-parser
• Language: Ruby
• Homepage:
• Size: 24.4 KB
• Stars: 3
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

Awesome Lists containing this project

README

        
# DeadCodeTerminator

![ci](https://github.com/razum2um/dead_code_terminator/actions/workflows/main.yml/badge.svg)

[![gem](https://badge.fury.io/rb/dead_code_terminator.svg)](https://rubygems.org/gems/dead_code_terminator)

[![codecov](https://codecov.io/gh/razum2um/dead_code_terminator/branch/master/graph/badge.svg)](https://app.codecov.io/gh/razum2um/dead_code_terminator)

This acts like [webpack's DefinePlugin](https://webpack.js.org/plugins/define-plugin/) with minification pass. It allows to eliminate dead code statically, which can be required by regulations.

```ruby

value = if ENV['FLAG']

  :then_branch

else

  value2 = unless ENV['PRODUCTION']

    :then_branch

  else

    ENV['RUNTIME'] ? :else1 : :else2

  end

end

```

```ruby

# returns a valid ruby code string back with statically evaluated conditions

DeadCodeTerminator.strip(string, env: { "PRODUCTION" => true, "FLAG" => false })

```

```ruby

value = 

  value2 = 

    ENV['RUNTIME'] ? :else1 : :else2

 

```

Note: it keeps *precise* code locations (including whitespaces and line-breaks).

So if you have hotfix patches from upstream - they'll be applied without conflicts.

Backtrace line numbers are also preserved and can point to original code.

Other examples can be found in [specs](https://github.com/razum2um/dead_code_terminator/blob/master/spec/dead_code_terminator_spec.rb)

## TODO

- builtin file tree processing

## License

The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).