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# frozen_string_literal: true
module Bundler
module Plugin
autoload :API, "bundler/plugin/api"
autoload :DSL, "bundler/plugin/dsl"
autoload :Index, "bundler/plugin/index"
autoload :Installer, "bundler/plugin/installer"
autoload :SourceList, "bundler/plugin/source_list"
class MalformattedPlugin < PluginError; end
class UndefinedCommandError < PluginError; end
PLUGIN_FILE_NAME = "plugins.rb".freeze
module_function
@commands = {}
# Installs a new plugin by the given name
#
# @param [Array<String>] names the name of plugin to be installed
# @param [Hash] options various parameters as described in description
# @option options [String] :source rubygems source to fetch the plugin gem from
# @option options [String] :version (optional) the version of the plugin to install
def install(names, options)
paths = Installer.new.install(names, options)
save_plugins paths
rescue PluginError => e
paths.values.map {|path| Bundler.rm_rf(path) } if paths
Bundler.ui.error "Failed to install plugin #{name}: #{e.message}\n #{e.backtrace.join("\n ")}"
end
# Evaluates the Gemfile with a limited DSL and installs the plugins
# specified by plugin method
#
# @param [Pathname] gemfile path
def gemfile_install(gemfile)
definition = DSL.evaluate(gemfile, nil, {})
return unless definition.dependencies.any?
plugins = Installer.new.install_definition(definition)
save_plugins plugins
end
# The index object used to store the details about the plugin
def index
@index ||= Index.new
end
# The directory root to all plugin related data
def root
@root ||= Bundler.user_bundle_path.join("plugin")
end
# The cache directory for plugin stuffs
def cache
@cache ||= root.join("cache")
end
# To be called via the API to register to handle a command
def add_command(command, cls)
@commands[command] = cls
end
# Checks if any plugins handles the command
def command?(command)
!index.command_plugin(command).nil?
end
# To be called from Cli class to pass the command and argument to
# approriate plugin class
def exec_command(command, args)
raise UndefinedCommandError, "Command #{command} not found" unless command? command
load_plugin index.command_plugin(command) unless @commands.key? command
@commands[command].new.exec(command, args)
end
# Post installation processing and registering with index
#
# @param [Hash] plugins mapped to their installtion path
def save_plugins(plugins)
plugins.each do |name, path|
path = Pathname.new path
validate_plugin! path
register_plugin name, path
Bundler.ui.info "Installed plugin #{name}"
end
end
# Checks if the gem is good to be a plugin
#
# At present it only checks whether it contains plugins.rb file
#
# @param [Pathname] plugin_path the path plugin is installed at
# @raise [Error] if plugins.rb file is not found
def validate_plugin!(plugin_path)
plugin_file = plugin_path.join(PLUGIN_FILE_NAME)
raise MalformattedPlugin, "#{PLUGIN_FILE_NAME} was not found in the plugin!" unless plugin_file.file?
end
# Runs the plugins.rb file in an isolated namespace, records the plugin
# actions it registers for and then passes the data to index to be stored.
#
# @param [String] name the name of the plugin
# @param [Pathname] path the path where the plugin is installed at
def register_plugin(name, path)
commands = @commands
@commands = {}
begin
load path.join(PLUGIN_FILE_NAME), true
rescue StandardError => e
raise MalformattedPlugin, "#{e.class}: #{e.message}"
end
index.register_plugin name, path.to_s, @commands.keys
ensure
@commands = commands
end
# Executes the plugins.rb file
#
# @param [String] name of the plugin
def load_plugin(name)
# Need to ensure before this that plugin root where the rest of gems
# are installed to be on load path to support plugin deps. Currently not
# done to avoid conflicts
path = index.plugin_path(name)
load path.join(PLUGIN_FILE_NAME)
end
class << self
private :load_plugin, :register_plugin, :save_plugins, :validate_plugin!
end
end
end
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