Automating the linking of tsd definitions with bower and npm: A step-by-step guide

Currently, I am in the process of transitioning an existing project to TypeScript which includes numerous bower and npm dependencies (bower.json and package.json). As mentioned on the tsd github page,

TSD facilitates the discovery and linking of definitions from packages installed via node or bower. By utilizing the link command, your tsd.d.ts file will be updated with paths to files within the node_modules or bower_modules directories.

However, upon executing the tsd link command following tsd init, it only displays no (new) packages to link even though my package.json contains a plethora of modules. This made me realize that perhaps its functionality is different than what I initially assumed.

This particular feature scans through the package.json and bower.json files looking for a typescript element. Within this element, there is a definition or definitions sub-element containing relative path(s) to .d.ts files:

What exactly is the purpose of this link feature if it doesn't directly fetch type definitions from my package.json? Is it solely meant to extract tsd configurations from my package.json as opposed to my tsd.json file? If so, what is the benefit, other than eliminating the need for the tsd.json file?

If not through tsd link, I wonder if there exists a more efficient method to automatically incorporate tsd definitions for all my dependencies. It appears somewhat daunting to manually handle each of these.

Answer №1

tsd link is not a mysterious command. Just like you, I was unsure what it meant the first time I saw it.

When you install new packages using bower or NPM, and the package comes with a .d.ts file along with a

"typescript": { "definition": "..."}
in the configuration file, that .d.ts will be included in your tsd.d.ts file as shown below:

/// <reference path="jquery/jquery.d.ts" />
/// <reference path="../bower_components/angular/angular.d.ts" />

If the package does not provide a d.ts file or definition configuration, this command will not have any effect.

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