Useful when

• updating/developing several npm modules in parallel (especially using npm link)
• creating an package.json file after installing modules

Usage

npm install -g npm-collect

then:

$ npm-collect --help
Usage: npm-collect <options>
Options:
  --devDependencies    process dev-dependencies instead of dependencies
  --new                include modules which are not found in package.json, but are installed
  --save               write changes to package.json
  -v <number>          verboselevel (0=silent,1=normal,2=debug)

Examples

Just see differences without writing to package.json

$ npm-collect
[email protected] -> 0.2.0
[email protected] -> 0.3.0

update your package.json

$ npm-collect --save
[email protected] -> 0.2.0
[email protected] -> 0.3.0

update package.json with newly discovered modules in node_modules

$ npm-collect --new --save
querystring@(unsaved) -> 0.2.0
ohmypgrah@(unsaved)   -> 0.2.0