parent-package-json

Using parent-package-json, you can find the parent package.json, so the package.json of the module that uses your module.

npm install --save parent-package-json

var parent = require('parent-package-json');

Getting started

For getting the path to the parent package.json of the executing module (so the module that runs this code), simply do:

var pathToParent = parent().path;

If you're not sure if there's always a parent package.json, you can check first, too:

var pathToParent = parent(); // Will return false if no parent exists

if(pathToParent !== false) {
  pathToParent = pathToParent.path;
}

Usually, parent-package-json will use process.cwd() for starting at, it will search the parent folders up until / for finding a package.json (and stops as soon as it finds one). If you want it to start somewhere other than process.cwd(), provide a path as an argument instead:

var pathToParentOfCustomPath = parent('/My/Cool/Folder').path;

If you want to ignore a package.json (for example to find the parent package.json of the parent module), you can pass an ignore parameter (default: 0) saying how many package.jsons you want to ignore when searching:

var pathToParentOfParent = parent(null, 1).path; // Or, even more complicated:
var pathToParentOfParentOfCustomPath = parent('/My/Cool/Folder', 1).path;

Note: The module's own package.json is always ignored, even if the ignore parameter equals 0

Processing the data

parent-package-json also allows you reading the content of a package.json, and even parsing its JSON right away.

For reading its content, do:

var contentOfParent = parent().read();

If you want to parse its JSON code, you can run:

var JSONOfParent = parent().parse();
var versionOfParent = JSONOfParent.version;

// Or

var versionOfParent = parent().parse().version;