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authorAdam Jacob <adam@hjksolutions.com>2009-03-11 18:11:34 -0700
committerAdam Jacob <adam@hjksolutions.com>2009-03-11 18:11:34 -0700
commite032a3f0549b8ba75d8d651a207d6940d12aac93 (patch)
tree3e79d460642088428e7a33b694b19e084b171237
downloadmixlib-config-e032a3f0549b8ba75d8d651a207d6940d12aac93.tar.gz
Initial commit
-rw-r--r--.gitignore1
-rw-r--r--LICENSE201
-rw-r--r--NOTICE27
-rw-r--r--README.rdoc41
-rw-r--r--Rakefile67
-rw-r--r--features/config.feature23
-rw-r--r--features/steps/config_steps.rb48
-rw-r--r--features/support/bobo.config3
-rw-r--r--features/support/config_it.rb24
-rw-r--r--features/support/env.rb31
-rw-r--r--lib/mixlib/config.rb118
-rwxr-xr-xscript/destroy14
-rwxr-xr-xscript/generate14
-rw-r--r--spec/mixlib/config_spec.rb78
-rw-r--r--spec/spec_helper.rb8
15 files changed, 698 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
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index 0000000..01d0a08
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+pkg/
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..11069ed
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
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+ communication on electronic mailing lists, source code control systems,
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+ "Contributor" shall mean Licensor and any individual or Legal Entity
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+2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
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+4. Redistribution. You may reproduce and distribute copies of the
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+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
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+ (b) You must cause any modified files to carry prominent notices
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+ (c) You must retain, in the Source form of any Derivative Works
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+ the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
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+APPENDIX: How to apply the Apache License to your work.
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diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..a7b0d2a
--- /dev/null
+++ b/NOTICE
@@ -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