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class Pry
class PluginManager
PRY_PLUGIN_PREFIX = /^pry-/
# Placeholder when no associated gem found, displays warning
class NoPlugin
def initialize(name)
@name = name
end
def method_missing(*args)
warn "Warning: The plugin '#{@name}' was not found! (no gem found)"
end
end
class Plugin
attr_accessor :name, :gem_name, :enabled, :spec, :active
def initialize(name, gem_name, spec, enabled)
@name, @gem_name, @enabled, @spec = name, gem_name, enabled, spec
end
# Disable a plugin. (prevents plugin from being loaded, cannot
# disable an already activated plugin)
def disable!
self.enabled = false
end
# Enable a plugin. (does not load it immediately but puts on
# 'white list' to be loaded)
def enable!
self.enabled = true
end
# Load the Command line options defined by this plugin (if they exist)
def load_cli_options
cli_options_file = File.join(spec.full_gem_path, "lib/#{spec.name}/cli.rb")
require cli_options_file if File.exists?(cli_options_file)
end
# Activate the plugin (require the gem - enables/loads the
# plugin immediately at point of call, even if plugin is
# disabled)
# Does not reload plugin if it's already active.
def activate!
# Create the configuration object for the plugin.
Pry.config.send("#{gem_name.gsub('-', '_')}=", OpenStruct.new)
begin
require gem_name if !active?
rescue LoadError => e
warn "Warning: The plugin '#{gem_name}' was not found! (gem found but could not be loaded)"
warn e
end
self.active = true
self.enabled = true
end
alias active? active
alias enabled? enabled
end
def initialize
@plugins = []
end
# Find all installed Pry plugins and store them in an internal array.
def locate_plugins
Gem.refresh
(Gem::Specification.respond_to?(:each) ? Gem::Specification : Gem.source_index.find_name('')).each do |gem|
next if gem.name !~ PRY_PLUGIN_PREFIX
plugin_name = gem.name.split('-', 2).last
@plugins << Plugin.new(plugin_name, gem.name, gem, true) if !gem_located?(gem.name)
end
@plugins
end
# @return [Hash] A hash with all plugin names (minus the 'pry-') as
# keys and Plugin objects as values.
def plugins
h = Hash.new { |_, key| NoPlugin.new(key) }
@plugins.each do |plugin|
h[plugin.name] = plugin
end
h
end
# Require all enabled plugins, disabled plugins are skipped.
def load_plugins
@plugins.each do |plugin|
plugin.activate! if plugin.enabled?
end
end
private
def gem_located?(gem_name)
@plugins.any? { |plugin| plugin.gem_name == gem_name }
end
end
end
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