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Who's there?
The modules that just called your code.
KnockKnock provides information about the files, functions, and packages that were responsible for calling your module.
$ npm install --save knockknockYou'll need to have at least Node.js 4 or newer.
Finds all of the available information about the callers asynchronously, returning a Promise to retrieve them. The
information for each caller is provided in a format similar to below:
{// The column number within the file responsible for calling your module.column: 10,// The file that called your modulefile: '/path/to/my-example-package/node_modules/example-server/src/start.js',// The line number within the file responsible for calling your moduleline: 123,// The name of the function within the file responsible for calling your module (or "<anonymous>" where appropriate)name: 'startServer',// The information for the package containing the file or null if none could be foundpackage: {// The directory of the packagedirectory: '/path/to/my-example-package/node_modules/example-server',// The file path of the "main" file for the package or null if it has nonemain: '/path/to/my-example-package/node_modules/example-server/server.js',// The name of the packagename: 'example-server',// The version of the packageversion: '3.2.1'}}The options parameter is entirely optional and supports the following:
| Option | Description | Default Value |
|---|---|---|
excludes | The name(s) of packages whose calls should be ignored. Internal calls from KnockKnock and Node.js are always ignored. | [] |
filterFiles | A function called to filter files based on their path. Only called for files whose containing package (if any) is also included. | N/A |
filterPackages | A function called to filter files based on the package to which they belong (if any). Only called if package is not listed in excludes. | N/A |
limit | The maximum number of callers to be included in the results. No limit is applied when null. | null |
offset | The number of frames from call stack to be skipped initially. | 0 |
In most cases, you may want to at least exclude your own package so that your own package-internal calls are ignored via
excludes or filterPackages.
constwhoIsThere=require('knockknock');module.exports=function(){returnwhoIsThere({excludes: 'my-example-package'}).then((callers)=>{if(callers.length>0){console.log(`Called from ${callers.length} modules`);// ...}else{console.log('Called from unknown module');// ...}});};The limit option works great if you only want to know about the last caller:
constwhoIsThere=require('knockknock');module.exports=function(){returnwhoIsThere({excludes: 'my-example-package',limit: 1}).then((callers)=>{if(callers.length===1){console.log(`Called from module "${callers[0].file}" in package "${callers[0].package ? callers[0].package.name : '<unknown>'}"`);// ...}else{console.log('Called from unknown module');// ...}});};A synchronous alternative to knockknock([options]).
constwhoIsThere=require('knockknock');module.exports=function(){constcallers=whoIsThere.sync({excludes: 'my-example-package'});if(callers.length>0){console.log(`Called from ${callers.length} modules`);// ...}else{console.log('Called from unknown module');// ...}};The current version of KnockKnock.
constwhoIsThere=require('knockknock');whoIsThere.version;=>"0.3.0"If you have any problems with KnockKnock or would like to see changes currently in development you can do so here.
If you want to contribute, you're a legend! Information on how you can do so can be found in CONTRIBUTING.md. We want your suggestions and pull requests!
A list of KnockKnock contributors can be found in AUTHORS.md.
See LICENSE.md for more information on our MIT license.
