TypeScript is a free and open source programming language developed and maintained by Microsoft. It is a strict superset of JavaScript, and adds optional static typing and class-based object-oriented programming to the language. - Wikipedia

lein-typescript is a Leiningen plugin that allows to use TypeScript compiler.

Install NodeJS and NPM (package manager for Node) to install TypeScript:

• On Ubuntu: sudo apt-get install nodejs
• On Mac OS X: brew install node

Install TypeScript to use lein-typescript plugin. It could be done in few ways:

• Use NPM to install TypeScript globally: npm install typescript -g
• You can also install TypeScript in the current directory: npm install typescript
• Use lein-npm plugin: lein npm install
• Use just Leiningen: lein deps

To configure lein-typescript, put the :typescript parameter in the file project.clj. It could be a single configuration (simple map) or a collection of configurations (for multiple configuration).

:typescript {
  :sources ["*.ts" "resources/*.ts"]
  :excludes ["bad.ts"]
  :out "app.js"
  :declaration true
  :remove-comments true
  :preserve-const-enums true
  :suppress-implicit-any-index-errors true
  :target :es5
}

:sources

List of input CoffeeScript sources. It is possible to use a single source or a vector of sources. To configure this parameter, you could also use a Glob Patterns.

:excludes

List of glob patterns to prevent processing of some files. It is also possible to use both variants: single pattern and collection of patterns.

:out-dir

Redirect output structure to the specified directory (it is undefined by default). ":out" parameter will be used in priority.

:out

Concatenate and emit output to single file which you can specify using this parameter (it is undefined by default).

:remove-comments

Do not emit comments to output (default value is "false").

:preserve-const-enums

Do not erase const enum declarations in generated code (default value is "false").

:suppress-implicit-any-index-errors

Suppress noImplicitAny errors for indexing objects lacking index signatures (default value is "false").

:declaration

Generates corresponding ".d.ts" file (default value is "false").

:source-map

Generates corresponding '.map' file (default is "false").

:module

Specify module code generation: :commonjs or :amd (it is undefined by default).

:target

Specify ECMAScript target version: :es3 (default), :es5, or :es6 (experimental).

:watch

Watch input files. It could be helpful to use this parameter with lein-pdo and/or with separate profile (default is "false").

To enable this plugin in the compile stage, use the following hook:

:hooks [lein-typescript.plugin]

To compile TypeScript files using configuration from project.clj, you should use: lein typescript. It is also possible to use short alias for typescript task: lein ts.

To show help: lein help typescript

Just clone the current repository and try to play with example project for better understanding how to use lein-typescript.

Microsoft Corporation, Anders Hejlsberg and TypeScript community for the great programming language.

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Copyright © 2015 Vladislav Bauer

Distributed under the Eclipse Public License, the same as Clojure.