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  • bundler/plugin/api/source.rb

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Bundler::Plugin::API::Source

This class provides the base to build source plugins All the method here are required to build a source plugin (except `uri_hash`, `gem_install_dir`; they are helpers).

Defaults for methods, where ever possible are provided which is expected to work. But, all source plugins have to override `fetch_gemspec_files` and `install`. Defaults are also not provided for `remote!`, `cache!` and `unlock!`.

The defaults shall work for most situations but nevertheless they can be (preferably should be) overridden as per the plugins' needs safely (as long as they behave as expected). On overriding `initialize` you should call super first.

If required plugin should override `hash`, `==` and `eql?` methods to be able to match objects representing same sources, but may be created in different situation (like form gemfile and lockfile). The default ones checks only for class and uri, but elaborate source plugins may need more comparisons (e.g. git checking on branch or tag).

@!attribute [r] uri

@return [String] the remote specified with `source` block in Gemfile

@!attribute [r] options

@return [String] options passed during initialization (either from
  lockfile or Gemfile)

@!attribute [r] name

@return [String] name that can be used to uniquely identify a source

@!attribute [rw] #dependency_names

@return [Array<String>] Names of dependencies that the source should
  try to resolve. It is not necessary to use this list internally. This
  is present to be compatible with `Definition` and is used by
  rubygems source.

Attributes

dependency_names[RW]
name[R]
options[R]
uri[R]

Public Class Methods

new(opts) click to toggle source
 
               # File bundler/plugin/api/source.rb, line 44
def initialize(opts)
  @options = opts
  @dependency_names = []
  @uri = opts["uri"]
  @type = opts["type"]
  @name = opts["name"] || "#{@type} at #{@uri}"
end
            

Public Instance Methods

==(other) click to toggle source

This shall check if two source object represent the same source.

The comparison shall take place only on the attribute that can be inferred from the options passed from Gemfile and not on attributes that are used to pin down the gem to specific version (e.g. Git sources should compare on branch and tag but not on commit hash)

The sources objects are constructed from Gemfile as well as from lockfile. To converge the sources, it is necessary that they match.

The same applies for `eql?` and `hash`

 
               # File bundler/plugin/api/source.rb, line 211
def ==(other)
  other.is_a?(self.class) && uri == other.uri
end
            
Also aliased as: eql?
add_dependency_names(names) click to toggle source

Used by definition.

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 256
def add_dependency_names(names)
  @dependencies |= Array(names)
end
            
app_cache_dirname() click to toggle source

Name of directory where plugin the is expected to cache the gems when cache is called.

Also this name is matched against the directories in cache for pruning

This is used by `app_cache_path`

 
               # File bundler/plugin/api/source.rb, line 176
def app_cache_dirname
  base_name = File.basename(Bundler::URI.parse(uri).normalize.path)
  "#{base_name}-#{uri_hash}"
end
            
app_cache_path(custom_path = nil) click to toggle source

The full path where the plugin should cache the gem so that it can be installed latter.

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 235
def app_cache_path(custom_path = nil)
  @app_cache_path ||= Bundler.app_cache(custom_path).join(app_cache_dirname)
end
            
bundler_plugin_api_source?() click to toggle source

@private Returns true

 
               # File bundler/plugin/api/source.rb, line 311
def bundler_plugin_api_source?
  true
end
            
cache(spec, custom_path = nil) click to toggle source

This method is called while caching to save copy of the gems that the source can resolve to path provided by `app_cache_app`so that they can be reinstalled from the cache without querying the remote (i.e. an alternative to remote)

This is stored with the app and source plugins should try to provide specs and install only from this cache when `cached!` is called.

This cache is different from the internal caching that can be done at sub paths of `cache_path` (from API). This can be though as caching by bundler.

 
               # File bundler/plugin/api/source.rb, line 192
def cache(spec, custom_path = nil)
  new_cache_path = app_cache_path(custom_path)

  FileUtils.rm_rf(new_cache_path)
  FileUtils.cp_r(install_path, new_cache_path)
  FileUtils.touch(app_cache_path.join(".bundlecache"))
end
            
cached!() click to toggle source

Set internal representation to fetch the gems/specs from app cache.

When this is called, the source should try to fetch the specs and install from the path provided by `app_cache_path`.

 
               # File bundler/plugin/api/source.rb, line 160
def cached!
end
            
can_lock?(spec) click to toggle source

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 261
def can_lock?(spec)
  spec.source == self
end
            
double_check_for(*) click to toggle source

@private This API on source might not be stable, and for now we expect plugins to download all specs in `#specs`, so we implement the method for compatibility purposes and leave it undocumented (and don't support) overriding it)

 
               # File bundler/plugin/api/source.rb, line 320
def double_check_for(*); end
            
eql?(other) click to toggle source

When overriding `eql?` please preserve the behaviour as mentioned in docstring for `==` method.

Alias for: ==
fetch_gemspec_files() click to toggle source

This is used by the default `spec` method to constructs the Specification objects for the gems and versions that can be installed by this source plugin.

Note: If the spec method is overridden, this function is not necessary

@return [Array<String>] paths of the gemspec files for gems that can

be installed
 
               # File bundler/plugin/api/source.rb, line 60
def fetch_gemspec_files
  []
end
            
gem_install_dir() click to toggle source

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 296
def gem_install_dir
  Bundler.install_path
end
            
hash() click to toggle source

When overriding `hash` please preserve the behaviour as mentioned in docstring for `==` method, i.e. two methods equal by above comparison should have same hash.

 
               # File bundler/plugin/api/source.rb, line 222
def hash
  [self.class, uri].hash
end
            
include?(other) click to toggle source

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 287
def include?(other)
  other == self
end
            
install(spec, opts) click to toggle source

Install the gem specified by the spec at appropriate path. `install_path` provides a sufficient default, if the source can only satisfy one gem, but is not binding.

@return [String] post installation message (if any)

 
               # File bundler/plugin/api/source.rb, line 80
def install(spec, opts)
  raise MalformattedPlugin, "Source plugins need to override the install method."
end
            
install_path() click to toggle source

A default installation path to install a single gem. If the source servers multiple gems, it's not of much use and the source should one of its own.

 
               # File bundler/plugin/api/source.rb, line 105
def install_path
  @install_path ||=
    begin
      base_name = File.basename(Bundler::URI.parse(uri).normalize.path)

      gem_install_dir.join("#{base_name}-#{uri_hash[0..11]}")
    end
end
            
installed?() click to toggle source

A helper method, not necessary if not used internally.

 
               # File bundler/plugin/api/source.rb, line 227
def installed?
  File.directory?(install_path)
end
            
local!() click to toggle source

Set internal representation to fetch the gems/specs locally.

When this is called, the source should try to fetch the specs and install from the local system.

 
               # File bundler/plugin/api/source.rb, line 146
def local!
end
            
options_to_lock() click to toggle source

Options to be saved in the lockfile so that the source plugin is able to check out same version of gem later.

There options are passed when the source plugin is created from the lock file.

@return [Hash]

 
               # File bundler/plugin/api/source.rb, line 71
def options_to_lock
  {}
end
            
post_install(spec, disable_exts = false) click to toggle source

It builds extensions, generates bins and installs them for the spec provided.

It depends on `spec.loaded_from` to get full_gem_path. The source plugins should set that.

It should be called in `install` after the plugin is done placing the gem at correct install location.

It also runs Gem hooks `pre_install`, `post_build` and `post_install`

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 96
def post_install(spec, disable_exts = false)
  opts = { :env_shebang => false, :disable_extensions => disable_exts }
  installer = Bundler::Source::Path::Installer.new(spec, opts)
  installer.post_install
end
            
remote!() click to toggle source

Set internal representation to fetch the gems/specs from remote.

When this is called, the source should try to fetch the specs and install from remote path.

 
               # File bundler/plugin/api/source.rb, line 153
def remote!
end
            
root() click to toggle source

It is used to obtain the full_gem_path.

spec's loaded_from path is expanded against this to get full_gem_path

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 305
def root
  Bundler.root
end
            
spec_names() click to toggle source

Used by definition.

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 249
def spec_names
  specs.spec_names
end
            
specs() click to toggle source

Parses the gemspec files to find the specs for the gems that can be satisfied by the source.

Few important points to keep in mind:

- If the gems are not installed then it shall return specs for all
the gems it can satisfy
- If gem is installed (that is to be detected by the plugin itself)
then it shall return at least the specs that are installed.
- The `loaded_from` for each of the specs shall be correct (it is
used to find the load path)

@return [Bundler::Index] index containing the specs

 
               # File bundler/plugin/api/source.rb, line 126
def specs
  files = fetch_gemspec_files

  Bundler::Index.build do |index|
    files.each do |file|
      next unless spec = Bundler.load_gemspec(file)
      Bundler.rubygems.set_installed_by_version(spec)

      spec.source = self
      Bundler.rubygems.validate(spec)

      index << spec
    end
  end
end
            
to_lock() click to toggle source

Generates the content to be entered into the lockfile. Saves type and remote and also calls to `options_to_lock`.

Plugin should use `options_to_lock` to save information in lockfile and not override this.

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 272
def to_lock
  out = String.new("#{LockfileParser::PLUGIN}\n")
  out << "  remote: #{@uri}\n"
  out << "  type: #{@type}\n"
  options_to_lock.each do |opt, value|
    out << "  #{opt}: #{value}\n"
  end
  out << "  specs:\n"
end
            
to_s() click to toggle source
 
               # File bundler/plugin/api/source.rb, line 282
def to_s
  "plugin source for #{@type} with uri #{@uri}"
end
            
unlock!() click to toggle source

This is called to update the spec and installation.

If the source plugin is loaded from lockfile or otherwise, it shall refresh the cache/specs (e.g. git sources can make a fresh clone).

 
               # File bundler/plugin/api/source.rb, line 167
def unlock!
end
            
unmet_deps() click to toggle source

Used by definition.

Note: Do not override if you don't know what you are doing.

 
               # File bundler/plugin/api/source.rb, line 242
def unmet_deps
  specs.unmet_dependency_names
end
            
uri_hash() click to toggle source
 
               # File bundler/plugin/api/source.rb, line 291
def uri_hash
  SharedHelpers.digest(:SHA1).hexdigest(uri)
end