Initial apt_preference commit

Specs are a placeholder on the provider side

Signed-off-by: Tim Smith <tsmith@chef.io>

1 files changed, 106 insertions, 0 deletions

diff --git a/lib/chef/provider/apt_preference.rb b/lib/chef/provider/apt_preference.rb
new file mode 100644
index 0000000000..92eeeb9aa5
--- /dev/null
+++ b/lib/chef/provider/apt_preference.rb
@@ -0,0 +1,106 @@
+#
+# Author:: Tim Smith (<tsmith@chef.io>)
+# Copyright:: Copyright (c) 2016 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 "chef/resource"
+require "chef/dsl/declare_resource"
+require "chef/mixin/which"
+require "chef/provider/noop"
+require "chef/log"
+
+class Chef
+  class Provider
+    class AptPreference < Chef::Provider
+      use_inline_resources
+
+      extend Chef::Mixin::Which
+
+      provides :apt_preference do
+        which("apt-get")
+      end
+
+      def whyrun_supported?
+        true
+      end
+
+      def load_current_resource
+      end
+
+      action :add do
+        preference = build_pref(
+          new_resource.glob || new_resource.package_name,
+          new_resource.pin,
+          new_resource.pin_priority
+        )
+
+        declare_resource(:directory, "/etc/apt/preferences.d") do
+          owner "root"
+          group "root"
+          mode "0755"
+          recursive true
+          action :create
+        end
+
+        name = safe_name(new_resource.name)
+
+        declare_resource(:file, "/etc/apt/preferences.d/#{new_resource.name}.pref") do
+          action :delete
+          if ::File.exist?("/etc/apt/preferences.d/#{new_resource.name}.pref")
+            Chef::Log.warn "Replacing #{new_resource.name}.pref with #{name}.pref in /etc/apt/preferences.d/"
+          end
+          only_if { name != new_resource.name }
+        end
+
+        declare_resource(:file, "/etc/apt/preferences.d/#{new_resource.name}") do
+          action :delete
+          if ::File.exist?("/etc/apt/preferences.d/#{new_resource.name}")
+            Chef::Log.warn "Replacing #{new_resource.name} with #{new_resource.name}.pref in /etc/apt/preferences.d/"
+          end
+        end
+
+        declare_resource(:file, "/etc/apt/preferences.d/#{name}.pref") do
+          owner "root"
+          group "root"
+          mode "0644"
+          content preference
+          action :create
+        end
+      end
+
+      action :delete do
+        name = safe_name(new_resource.name)
+        if ::File.exist?("/etc/apt/preferences.d/#{name}.pref")
+          Chef::Log.info "Un-pinning #{name} from /etc/apt/preferences.d/"
+          declare_resource(:file, "/etc/apt/preferences.d/#{name}.pref") do
+            action :delete
+          end
+        end
+      end
+    end
+
+    # Build preferences.d file contents
+    def build_pref(package_name, pin, pin_priority)
+      "Package: #{package_name}\nPin: #{pin}\nPin-Priority: #{pin_priority}\n"
+    end
+
+    def safe_name(name)
+      name.tr(".", "_").gsub("*", "wildcard")
+    end
+  end
+end
+
+Chef::Provider::Noop.provides :apt_preference