npm-package-buffer

Buffers entries from a tar.Parse() stream for an npm package into memory

Usage

var fs = require('fs');
var zlib = require('zlib');
var tar = require('tar');
var PackageBuffer = require('npm-package-buffer');

var parser = tar.Parse();
var buffer = new PackageBuffer(parser)
  .on('error', function (err) { console.log ('tar error: %s', err); })
  .on('end', function () {
    //
    // Log fully read the package.json
    // aliased to `.pkg` as well.
    //
    console.dir(buffer.package);
    console.dir(buffer.pkg);

    //
    // Log all our files in memory
    //
    console.dir(buffer.files);
  });

//
// Read our tarball and pipe it to the tar parser.
//
fs.createReadStream('any-npm-package-1.2.3.tgz')
  .pipe(zlib.Unzip())
  .on('error', function (err) { console.log('zlib error: %s', err); })
  .pipe(parser);

API

See also: tar-buffer.

Options

• log: (optional) Log function to use. Expects console.log API.

Why isn't this a proper stream?

Underneath the covers, tar emits several events, not just data events which have to be handled seprately from a traditional stream.