Module Smith

A simple extensible npm build bot that works on Linux, SmartOS, and Windows.

Example

Given a small script for building a specific module:

var assert = require('assert'),
    tmp = require('tmp'),
    ModuleSmith = require('module-smith');

var buildbot = ModuleSmith.createModuleSmith();

//
// Grab a temporary directory to build in
//
tmp.dir(function (err, tmpdir) {
  assert.ifError(err);
  //
  // Start our build
  //
  buildbot.build({
    repository: {
      type: 'git',
      url: '[email protected]:bmeck/bcrypt-example.git'
    },
    directories: {
      root: tmpdir
    }
  }, function (err, stream) {
    assert.ifError(err);
    //
    // Pipe out the data to stdio
    //
    stream.pipe(process.stdout);
  });
});

We can dump it to a file via:

node build.js > built.tgz

API

ModuleSmith.createModuleSmith(options)

• Array options.versions: List of the versions supported with absolute version numbers like ie. '0.8.12'
• BuildDescription options.defaults: The defaults for a build run using this ModuleSmith.

ModuleSmith.build(buildDescription, callback(err, tgzStream))

Runs a build

BuildDescription

{
  uid: 'nobody',
  gid: 'nobody',
  command: 'install',
  env: {
    'npm_config_registry': 'http://registry.npmjs.org',
    'npm_config_nodedir':  path.join(process.env.HOME, '.node-gyp')
  },
  repository: {
    type: 'git',
    url: '[email protected]:bmeck/bcrypt-example.git'
  },
  directories: {
    root: '/path/to/build/output/root'
  }
}

A build description enumerates a number of values

BuildDescription.command

The npm command that you wish to execute for the build. Can be:

• install: Installs all module dependencies.
• build: Runs node-gyp to build any binary dependencies.

BuildDescription.env

Optional environmental variables to spawn npm with.

Some interesting fields are:

• npm_config_registry - registry to download from
• npm_config_nodedir - location of node-gyp's include directory

BuildDescription.uid = 'nobody'

Optional user to spawn npm as.

BuildDescription.gid = undefined

Optional group to spawn npm under.

BuildDescription.package

Optional package.json overrides. Can be extended easily from the repository during npm.configure.

Some interesting fields are:

• engines.node - version to spawn as

BuildDescription.repository

A checkout npm module repository to download before building.

BuildDescription.directories.root

The place to use for creating the build.

Understudy Actions

Extensibility for complex actions can be done via Understudy based actions, only before actions are supported.

• build.configure (buildDescription)
• npm.configure (buildDescription)
• npm.package (buildDescription, package)
• build.output (buildDescription, tgzStream)

Events

Notifications of actions that have been completed are available via the EventEmitter APIs.

• npm.spawned (buildDescription, npmProcess)

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