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#
# Author:: Bryan McLellan <btm@loftninjas.org>
# Copyright:: Copyright (c) Chef Software 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_relative "package"
require_relative "gem_package"
require_relative "../dist"
class Chef
class Resource
require_relative "gem_package"
require_relative "../dist"
class ChefGem < Chef::Resource::Package::GemPackage
unified_mode true
provides :chef_gem
description <<~DESC
Use the **chef_gem** resource to install a gem only for the instance of Ruby that is dedicated to the chef-client.
When a gem is installed from a local file, it must be added to the node using the **remote_file** or **cookbook_file** resources.
The **chef_gem** resource works with all of the same properties and options as the **gem_package** resource, but does not
accept the `gem_binary` property because it always uses the `CurrentGemEnvironment` under which the `chef-client` is
running. In addition to performing actions similar to the **gem_package** resource, the **chef_gem** resource does the
following:
- Runs its actions immediately, before convergence, allowing a gem to be used in a recipe immediately after it is installed.
- Runs `Gem.clear_paths` after the action, ensuring that gem is aware of changes so that it can be required immediately after it is installed.
Warning: The **chef_gem** and **gem_package** resources are both used to install Ruby gems. For any machine on which Chef Infra Client is
installed, there are two instances of Ruby. One is the standard, system-wide instance of Ruby and the other is a dedicated instance that is
available only to Chef Infra Client.
Use the **chef_gem** resource to install gems into the instance of Ruby that is dedicated to Chef Infra Client.
Use the **gem_package** resource to install all other gems (i.e. install gems system-wide).
DESC
examples <<~EXAMPLES
**Compile time vs. converge time installation of gems**
To install a gem while Chef Infra Client is configuring the node (the converge phase), set the `compile_time` property to `false`:
```ruby
chef_gem 'right_aws' do
compile_time false
action :install
end
```
To install a gem while the resource collection is being built (the compile phase), set the `compile_time` property to `true`:
```ruby
chef_gem 'right_aws' do
compile_time true
action :install
end
```
Install MySQL for Chef
```ruby
apt_update
build_essential 'install compilation tools' do
compile_time true
end
chef_gem 'mysql'
```
EXAMPLES
property :package_name, String,
description: "An optional property to set the package name if it differs from the resource block's name.",
identity: true
property :version, String,
description: "The version of a package to be installed or upgraded."
property :gem_binary, String,
default: "#{RbConfig::CONFIG["bindir"]}/gem",
default_description: "The `gem` binary included with #{Chef::Dist::PRODUCT}.",
description: "The path of a gem binary to use for the installation. By default, the same version of Ruby that is used by #{Chef::Dist::PRODUCT} will be installed.",
callbacks: {
"The `chef_gem` resource is restricted to the current gem environment, use `gem_package` to install to other environments." =>
proc { |v| v == "#{RbConfig::CONFIG["bindir"]}/gem" },
}
end
end
end
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