ts-prune

Find potentially unused exports in your Typescript project with zero configuration.

Getting Started

ts-prune exposes a cli that reads your tsconfig file and prints out all the unused exports in your source files.

Installing

Install ts-prune with yarn or npm

# npm
npm install ts-prune --save-dev
# yarn
yarn add -D ts-prune

Usage

You can install it in your project and alias it to a npm script in package.json.

{
  "scripts": {
    "find-deadcode": "ts-prune"
  }
}

If you want to run against different Typescript configuration than tsconfig.json:

ts-prune -p tsconfig.dev.json

Examples

• gatsby-material-starter
• DestinyItemManager

Configuration

ts-prune supports CLI and file configuration via cosmiconfig (all file formats are supported).

Configuration options

• -p, --project - tsconfig.json path(tsconfig.json by default)
• -i, --ignore - errors ignore RegExp pattern
• -e, --error - return error code if unused exports are found
• -s, --skip - skip these files when determining whether code is used. (For example, .test.ts? will stop ts-prune from considering an export in test file usages)

CLI configuration options:

ts-prune -p my-tsconfig.json -i my-component-ignore-patterns?

Configuration file example .ts-prunerc:

{
  "ignore": "my-component-ignore-patterns?"
}

FAQ

How do I get the count of unused exports?

ts-prune | wc -l

How do I ignore a specific path?

You can either,

1. Use the -i, --ignore configuration option:

ts-prune --ignore 'src/ignore-this-path'

2. Use grep -v to filter the output:

ts-prune | grep -v src/ignore-this-path

How do I ignore multiple paths?

You can either,

1. Use the -i, --ignore configuration option:

ts-prune --ignore 'src/ignore-this-path|src/also-ignore-this-path'

2. Use multiple grep -v to filter the output:

ts-prune | grep -v src/ignore-this-path | grep -v src/also-ignore-this-path

How do I ignore a specific identifier?

You can either,

1. Prefix the export with // ts-prune-ignore-next

// ts-prune-ignore-next
export const thisNeedsIgnoring = foo;

2. Use grep -v to ignore a more widely used export name

ts-prune | grep -v ignoreThisThroughoutMyCodebase

Acknowledgements

• The excellent ts-morph library. And this gist by @dsherret.

Contributors

Nadeesha Cabral	Snyk bot	Dan Vanderkam	Josh Goldberg	Vitaly Iegorov	Amir Arad
David Graham	Davis Ford	Ivo Raisr	Kristján Oddsson	Simon Jang	The Gitter Badger
Tim Bodeit	Tim Saunders	Torkel Rogstad	Victor Nogueira	William Candillon	phiresky