diff options
author | Adam Jacob <adam@hjksolutions.com> | 2009-03-11 18:11:34 -0700 |
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committer | Adam Jacob <adam@hjksolutions.com> | 2009-03-11 18:11:34 -0700 |
commit | e032a3f0549b8ba75d8d651a207d6940d12aac93 (patch) | |
tree | 3e79d460642088428e7a33b694b19e084b171237 | |
download | mixlib-config-e032a3f0549b8ba75d8d651a207d6940d12aac93.tar.gz |
Initial commit
-rw-r--r-- | .gitignore | 1 | ||||
-rw-r--r-- | LICENSE | 201 | ||||
-rw-r--r-- | NOTICE | 27 | ||||
-rw-r--r-- | README.rdoc | 41 | ||||
-rw-r--r-- | Rakefile | 67 | ||||
-rw-r--r-- | features/config.feature | 23 | ||||
-rw-r--r-- | features/steps/config_steps.rb | 48 | ||||
-rw-r--r-- | features/support/bobo.config | 3 | ||||
-rw-r--r-- | features/support/config_it.rb | 24 | ||||
-rw-r--r-- | features/support/env.rb | 31 | ||||
-rw-r--r-- | lib/mixlib/config.rb | 118 | ||||
-rwxr-xr-x | script/destroy | 14 | ||||
-rwxr-xr-x | script/generate | 14 | ||||
-rw-r--r-- | spec/mixlib/config_spec.rb | 78 | ||||
-rw-r--r-- | spec/spec_helper.rb | 8 |
15 files changed, 698 insertions, 0 deletions
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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + +Copyright [yyyy] [name of copyright owner] + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. @@ -0,0 +1,27 @@ +Mixin::Config NOTICE +================= + +Developed at Opscode (http://www.opscode.com). + + * Copyright 2009, Opscode, Inc. <legal@opscode.com> + +Mixin::Config incorporates code from Chef. The Chef notice file follows: + +Chef NOTICE +=========== + +Developed at Opscode (http://www.opscode.com). + +Contributors and Copyright holders: + + * Copyright 2008, Adam Jacob <adam@opscode.com> + * Copyright 2008, Arjuna Christensen <aj@hjksolutions.com> + * Copyright 2008, Bryan McLellan <btm@loftninjas.org> + * Copyright 2008, Ezra Zygmuntowicz <ezra@engineyard.com> + * Copyright 2009, Sean Cribbs <seancribbs@gmail.com> + * Copyright 2009, Christopher Brown <cb@opscode.com> + * Copyright 2009, Thom May <thom@clearairturbulence.org> + +Chef incorporates code modified from Open4 (http://www.codeforpeople.com/lib/ruby/open4/), which was written by Ara T. Howard. + +Chef incorporates code modified from Merb (http://www.merbivore.com), which is Copyright (c) 2008 Engine Yard. diff --git a/README.rdoc b/README.rdoc new file mode 100644 index 0000000..7c04b86 --- /dev/null +++ b/README.rdoc @@ -0,0 +1,41 @@ +== Mixlib::Config + +Mixlib::Config provides a class-based configuration object, like the one used in Chef. To use in your project: + + require 'rubygems' + require 'mixlib/config' + + class MyConfig + extend(Mixlib::Config) + configure do |c| + c[:first_value] = 'something' + c[:other_value] = 'something_else' + end + end + +Or... + + class MyConfig + extend(Mixlib::Config) + + first_value 'something' + other_value 'something_else' + end + +To check a configuration variable: + + MyConfig.first_value # returns 'something' + MyConfig[:first_value] # returns 'something' + +To change a configuration variable at runtime: + + MyConfig.first_value('foobar') # sets first_value to 'foobar' + MyConfig[:first_value] = 'foobar' # sets first_value to 'foobar' + +You should populate your class with the default values for every configuration variable that might be accessed. If you try and access a variable that does not exist, Mixlib::Config will throw an <ArgumentError>. + +To load a ruby configuration file (which will evaluate in the context of your configuration class): + + MyConfig.from_file('your_config_file.rb') + +Enjoy! diff --git a/Rakefile b/Rakefile new file mode 100644 index 0000000..c9b42fb --- /dev/null +++ b/Rakefile @@ -0,0 +1,67 @@ +require 'rubygems' +require 'rake/gempackagetask' +require 'rubygems/specification' +require 'date' +require 'spec/rake/spectask' +require 'cucumber/rake/task' + + +GEM = "mixlib-config" +GEM_VERSION = "1.0.0" +AUTHOR = "Opscode, Inc." +EMAIL = "info@opscode.com" +HOMEPAGE = "http://www.opscode.com" +SUMMARY = "A class based config mixin, similar to the one found in Chef." + +spec = Gem::Specification.new do |s| + s.name = GEM + s.version = GEM_VERSION + s.platform = Gem::Platform::RUBY + s.has_rdoc = true + s.extra_rdoc_files = ["README.rdoc", "LICENSE", 'NOTICE'] + s.summary = SUMMARY + s.description = s.summary + s.author = AUTHOR + s.email = EMAIL + s.homepage = HOMEPAGE + + # Uncomment this to add a dependency + # s.add_dependency "foo" + + s.require_path = 'lib' + s.autorequire = GEM + s.files = %w(LICENSE README.rdoc Rakefile NOTICE) + Dir.glob("{lib,spec,features}/**/*") +end + +task :default => :test + +desc "Run specs" +Spec::Rake::SpecTask.new do |t| + t.spec_files = FileList['spec/**/*_spec.rb'] + t.spec_opts = %w(-fs --color) +end + +Rake::GemPackageTask.new(spec) do |pkg| + pkg.gem_spec = spec +end + +desc "install the gem locally" +task :install => [:package] do + sh %{sudo gem install pkg/#{GEM}-#{GEM_VERSION}} +end + +desc "create a gemspec file" +task :make_spec do + File.open("#{GEM}.gemspec", "w") do |file| + file.puts spec.to_ruby + end +end + +Cucumber::Rake::Task.new(:features) do |t| + t.step_pattern = 'features/steps/**/*.rb' + supportdir = 'features/support' + t.cucumber_opts = "--format pretty -r #{supportdir}" +end + +desc "Run the spec and features" +task :test => [ :features, :spec ]
\ No newline at end of file diff --git a/features/config.feature b/features/config.feature new file mode 100644 index 0000000..6defc7a --- /dev/null +++ b/features/config.feature @@ -0,0 +1,23 @@ +Feature: Configure an application + In order to make it trivial to configure an application + As a Developer + I want to utilize a simple configuration object + +Scenario: Set a configuration option to a string + Given a configuration class + When I set 'foo' to 'bar' + Then config option 'foo' is 'bar' + +Scenario: Set a configuration option to an Array + Given a configuration class + When I set 'foo' to: + |key| + |bar| + |baz| + Then an array is returned for 'foo' + +Scenario: Set a configuration option from a file + Given a configuration file 'bobo.config' + When I load the configuration + Then config option 'foo' is 'bar' + And config option 'baz' is 'snarl' diff --git a/features/steps/config_steps.rb b/features/steps/config_steps.rb new file mode 100644 index 0000000..867702d --- /dev/null +++ b/features/steps/config_steps.rb @@ -0,0 +1,48 @@ +# +# Author:: Adam Jacob (<adam@opscode.com>) +# Copyright:: Copyright (c) 2008 Opscode, Inc. +# License:: Apache License, Version 2.0 +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +Given /^a configuration class$/ do +end + +When /^I set '(.+)' to '(.+)'$/ do |key, value| + ConfigIt[key.to_sym] = value +end + +Then /^config option '(.+)' is '(.+)'$/ do |key, value| + ConfigIt[key.to_sym].should == value +end + +When /^I set '(.+)' to:$/ do |key, foo_table| + ConfigIt[key.to_sym] = Array.new + foo_table.hashes.each do |hash| + ConfigIt[key.to_sym] << hash['key'] + end +end + +Then /^an array is returned for '(.+)'$/ do |key| + ConfigIt[key.to_sym].should be_a_kind_of(Array) +end + +Given /^a configuration file '(.+)'$/ do |filename| + @config_file = File.join(File.dirname(__FILE__), "..", "support", filename) +end + +When /^I load the configuration$/ do + ConfigIt.from_file(@config_file) +end + diff --git a/features/support/bobo.config b/features/support/bobo.config new file mode 100644 index 0000000..9c731cd --- /dev/null +++ b/features/support/bobo.config @@ -0,0 +1,3 @@ +# Sample config file +foo 'bar' +baz 'snarl'
\ No newline at end of file diff --git a/features/support/config_it.rb b/features/support/config_it.rb new file mode 100644 index 0000000..28ea454 --- /dev/null +++ b/features/support/config_it.rb @@ -0,0 +1,24 @@ +# +# Author:: Adam Jacob (<adam@opscode.com>) +# Copyright:: Copyright (c) 2008 Opscode, Inc. +# License:: Apache License, Version 2.0 +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +$: << File.join(File.dirname(__FILE__), '..', '..', 'lib') +require 'mixlib/config' + +class ConfigIt + extend Mixlib::Config +end
\ No newline at end of file diff --git a/features/support/env.rb b/features/support/env.rb new file mode 100644 index 0000000..4e3b68d --- /dev/null +++ b/features/support/env.rb @@ -0,0 +1,31 @@ +# +# Author:: Adam Jacob (<adam@opscode.com>) +# Copyright:: Copyright (c) 2008 Opscode, Inc. +# License:: Apache License, Version 2.0 +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +$: << File.join(File.dirname(__FILE__), '..', '..', 'lib') + +require 'spec/expectations' +require 'mixlib/config' +require 'tmpdir' +require 'stringio' + +class MyWorld +end + +World do + MyWorld.new +end diff --git a/lib/mixlib/config.rb b/lib/mixlib/config.rb new file mode 100644 index 0000000..bfa488c --- /dev/null +++ b/lib/mixlib/config.rb @@ -0,0 +1,118 @@ +# +# Author:: Adam Jacob (<adam@opscode.com>) +# Copyright:: Copyright (c) 2008 Opscode, Inc. +# License:: Apache License, Version 2.0 +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +module Mixlib + module Config + + @@configuration = Hash.new + + # Loads a given ruby file, and runs instance_eval against it in the context of the current + # object. + # + # Raises an IOError if the file cannot be found, or is not readable. + # + # === Parameters + # <string>:: A filename to read from + def from_file(filename) + if File.exists?(filename) && File.readable?(filename) + self.instance_eval(IO.read(filename), filename, 1) + else + raise IOError, "Cannot open or read #{filename}!" + end + end + + # Pass Mixlib::Config.configure() a block, and it will yield @configuration. + # + # === Parameters + # <block>:: A block that takes @configure as it's argument + def configure(&block) + block.call(@@configuration) + end + + # Get the value of a configuration option + # + # === Parameters + # config_option<Symbol>:: The configuration option to return + # + # === Returns + # value:: The value of the configuration option + # + # === Raises + # <ArgumentError>:: If the configuration option does not exist + def [](config_option) + if @@configuration.has_key?(config_option.to_sym) + @@configuration[config_option.to_sym] + else + raise ArgumentError, "Cannot find configuration option #{config_option.to_s}" + end + end + + # Set the value of a configuration option + # + # === Parameters + # config_option<Symbol>:: The configuration option to set (within the []) + # value:: The value for the configuration option + # + # === Returns + # value:: The new value of the configuration option + def []=(config_option, value) + @@configuration[config_option.to_sym] = value + end + + # Check if Mixlib::Config has a configuration option. + # + # === Parameters + # key<Symbol>:: The configuration option to check for + # + # === Returns + # <True>:: If the configuration option exists + # <False>:: If the configuration option does not exist + def has_key?(key) + @@configuration.has_key?(key.to_sym) + end + + # Allows for simple lookups and setting of configuration options via method calls + # on Mixlib::Config. If there any arguments to the method, they are used to set + # the value of the configuration option. Otherwise, it's a simple get operation. + # + # === Parameters + # method_symbol<Symbol>:: The method called. Must match a configuration option. + # *args:: Any arguments passed to the method + # + # === Returns + # value:: The value of the configuration option. + # + # === Raises + # <ArgumentError>:: If the method_symbol does not match a configuration option. + def method_missing(method_symbol, *args) + num_args = args.length + + # If we have the symbol, or if we need to set it + if @@configuration.has_key?(method_symbol) || num_args > 0 + if num_args > 0 + @@configuration[method_symbol] = num_args == 1 ? args[0] : args + end + return @@configuration[method_symbol] + else + # Otherwise, we're just looking it up + raise ArgumentError, "Cannot find configuration option #{method_symbol.to_s}" + end + end + + end +end diff --git a/script/destroy b/script/destroy new file mode 100755 index 0000000..40901a8 --- /dev/null +++ b/script/destroy @@ -0,0 +1,14 @@ +#!/usr/bin/env ruby +APP_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..')) + +begin + require 'rubigen' +rescue LoadError + require 'rubygems' + require 'rubigen' +end +require 'rubigen/scripts/destroy' + +ARGV.shift if ['--help', '-h'].include?(ARGV[0]) +RubiGen::Base.use_component_sources! [:newgem_simple, :test_unit] +RubiGen::Scripts::Destroy.new.run(ARGV) diff --git a/script/generate b/script/generate new file mode 100755 index 0000000..5c8ed01 --- /dev/null +++ b/script/generate @@ -0,0 +1,14 @@ +#!/usr/bin/env ruby +APP_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..')) + +begin + require 'rubigen' +rescue LoadError + require 'rubygems' + require 'rubigen' +end +require 'rubigen/scripts/generate' + +ARGV.shift if ['--help', '-h'].include?(ARGV[0]) +RubiGen::Base.use_component_sources! [:newgem_simple, :test_unit] +RubiGen::Scripts::Generate.new.run(ARGV) diff --git a/spec/mixlib/config_spec.rb b/spec/mixlib/config_spec.rb new file mode 100644 index 0000000..a11c28e --- /dev/null +++ b/spec/mixlib/config_spec.rb @@ -0,0 +1,78 @@ +# +# Author:: Adam Jacob (<adam@opscode.com>) +# Copyright:: Copyright (c) 2008 Opscode, Inc. +# License:: Apache License, Version 2.0 +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +require File.expand_path(File.join(File.dirname(__FILE__), "..", "spec_helper")) + +describe Mixlib::Config do + before(:each) do + ConfigIt.configure do |c| + c[:alpha] = 'omega' + c[:foo] = nil + end + end + + it "should load a config file" do + File.stub!(:exists?).and_return(true) + File.stub!(:readable?).and_return(true) + IO.stub!(:read).with('config.rb').and_return("alpha = 'omega'\nfoo = 'bar'") + lambda { + ConfigIt.from_file('config.rb') + }.should_not raise_error + end + + it "should raise an ArgumentError with an explanation if you try and set a non-existent variable" do + lambda { + ConfigIt[:foobar] + }.should raise_error(ArgumentError) + end + + it "should raise an IOError if it can't find the file" do + lambda { + ConfigIt.from_file("/tmp/timmytimmytimmy") + }.should raise_error(IOError) + end + + it "should allow you to reference a value by index" do + ConfigIt[:alpha].should == 'omega' + end + + it "should allow you to set a value by index" do + ConfigIt[:alpha] = "one" + ConfigIt[:alpha].should == "one" + end + + it "should allow you to set config values with a block" do + ConfigIt.configure do |c| + c[:cookbook_path] = "monkey_rabbit" + c[:otherthing] = "boo" + end + ConfigIt.cookbook_path.should == "monkey_rabbit" + ConfigIt.otherthing.should == "boo" + end + + it "should raise an ArgumentError if you access a config option that does not exist" do + lambda { ConfigIt[:snob_hobbery] }.should raise_error(ArgumentError) + end + + it "should return true or false with has_key?" do + ConfigIt.has_key?(:monkey).should eql(false) + ConfigIt[:monkey] = "gotcha" + ConfigIt.has_key?(:monkey).should eql(true) + end + +end
\ No newline at end of file diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb new file mode 100644 index 0000000..e7ba82b --- /dev/null +++ b/spec/spec_helper.rb @@ -0,0 +1,8 @@ +$TESTING=true +$:.push File.join(File.dirname(__FILE__), '..', 'lib') + +require 'mixlib/config' + +class ConfigIt + extend Mixlib::Config +end |