component-resolver

component-resolver

Resolve a component's dependency tree.

• Relies on components' newer specs
• Validates and normalizes component.jsons
• Supports installing components
• Supports globs for both remote and local components
• Supports semver resolution for dependencies

This uses:

• remotes - normalize remote end points
• downloader - downloads repositories
• flatten - flatten a dependency tree into a list
• validator - validate component.jsons

Example

var resolve = require('component-resolver');
var flatten = require('component-flatten');

resolve({
  // a "component.json"
  dependencies: {
    'component/emitter': '1.1.1'
  }
}, function (err, tree) {
  if (err) throw err;

  tree.dependencies['component/emitter'];
  /**
   * name: 'component/emitter'
   * version: '1.1.1'
   * ref: '1.1.1'
   */

   // flatten the dependency tree
   var nodes = flatten(tree);
   nodes[0].name === 'component/emitter';
});

API

resolve(component, [options], [callback])

component can be a "root" folder, process.cwd() by default. component can also be "component.json" object. This is useful for resolving dependencies without reading anything from disk. You should at least set it to null.

The main options are:

• root <process.cwd()> - if component.json is an object, this will set the root.

• remote - a remotes instance. Defaults to the local dir and github.

• local - try resolving against locally installed components. Only relevant if you don't set a remote.

• development - include development in local components

• dependencies - resolve dependencies

• verbose - print warnings and status messages

• concurrency <{}> - an object with concurrency values for different channels. Defaults:

  • locals: 16
  • dependencies: 5
  • semver: 1
  • installs: 5
  • downloads: 1

Options passed to component-downloader:

• install - install components to out
• out <components> - folder to install components to
• fields - fields of component.jsons to download files, defaults to those defined in the spec
• archive - install entire repositories instead of just necessary files

callback is a function with signature (err, tree). You if no callback is set, a generator is returned.

resolve(root, options, function (err, tree) {

});

// or if you use generators

co(function* () {
  var tree = yield* resolve(root, options);
})();

tree and branches

This resolver returns a tree. The tree consists of branches that connect nodes. Each node is the relevant component.json. Thus, you can view the branches as how each component relates to each other as well as additional metadata.

There are two types of branches: local for local components and dependency for remote components. Properties:

• type - either local or dependency
• name
• canonical - a canonical, unique name for this component. For remote dependencies, this is <user>~<project>@<reference>. For local components, this is the relative path from root to this component's path. ~ is used instead of / or - to ensure canonical names are in fact unique and do not look like paths.
• dependencies {} - remote dependencies of this component
• locals {} - local dependencies of this component
• dependents [] - dependents of this component
• node - the node's component.json
• path - the path of the component, not including /component.json.
• filename - the filename of this component.json
• paths - absolute .paths of this component. paths are inherited from their parent.
• remotes - list of remote names to lookup dependencies of this component. remotes are inherited from their parent.
• resolvedRemotes - a list of all the remotes, including this component's parents'

Locals additionally have:

• relativePath - relative path to the local component's folder resolved against root

Dependencies additionally have:

• ref - git reference such as master, v1.0.0, etc.
• version - the semantic version, if any

License

The MIT License (MIT)

Copyright (c) 2014 Jonathan Ong [e-mail]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.