npm-package-sync

synchronize the npm package list to a local file

example

This program will keep packages.json in sync with the package list on registry.npmjs.org, storing the name, description, and keywords fields.

var pkgSync = require('npm-package-sync');
 
pkgSync(__dirname + '/packages.json', function (sync) {
    sync.on('package', function (pkg) {
        console.log(pkg.name);
    });
    
    if (!sync.exists) sync.update(filter)
    setInterval(function () {
        console.log('# ' + Date.now());
        sync.update(filter)
    }, 3 * 1000 * 60);
    
    function filter (pkg) {
        return {
            name: pkg.name,
            description: pkg.description,
            keywords: pkg.keywords
        };
    }
});

---

After running sync.js the first time create the initial package list, every 3 minutes it will check to see if there have been any updates using the mtime from the package.json file.

$ node example/sync.js 
# 1356856441891
connect-raven
# 1356856621966
# 1356856802059
tweet-blink
^C

methods

var pkgSync = require('npm-package-sync')

pkgSync(file, cb)

Synchronize file with registry.npmjs.org. cb(sync) fires with the sync object after file has been read if it exists.

sync.update(filter)

Synchronize the current packages.json and in-memory cache with the remote repository. If filter(pkg) is given, it should return the object to store in the synchronized file. Otherwise the entire record will be stored.

attributes

sync.packages

the array of package data is kept in memory here

sync.exists

true when file exists

events

sync.on('package', function (pkg) {})

When a package update is parsed, this event fires with the raw package object before filtering.

install

With npm do:

npm install npm-package-sync

license

MIT