add iam_role_policy_attachment

lib/terraforming.rb

@@ -45,6 +45,7 @@
 require "terraforming/resource/iam_policy_attachment"
 require "terraforming/resource/iam_role"
 require "terraforming/resource/iam_role_policy"
+require "terraforming/resource/iam_role_policy_attachment"
 require "terraforming/resource/iam_user"
 require "terraforming/resource/iam_user_policy"
 require "terraforming/resource/kms_alias"

lib/terraforming/cli.rb

@@ -115,6 +115,11 @@ def iamrp
       execute(Terraforming::Resource::IAMRolePolicy, options)
     end
 
+    desc "iamrpa", "IAM Role Policy Attachment"
+    def iamrpa
+      execute(Terraforming::Resource::IAMRolePolicyAttachment, options)
+    end
+
     desc "iamu", "IAM User"
     def iamu
       execute(Terraforming::Resource::IAMUser, options)

lib/terraforming/resource/iam_role_policy_attachment.rb

@@ -0,0 +1,72 @@
+module Terraforming
+  module Resource
+    class IAMRolePolicyAttachment
+      include Terraforming::Util
+
+      def self.tf(client: Aws::IAM::Client.new)
+        self.new(client).tf
+      end
+
+      def self.tfstate(client: Aws::IAM::Client.new)
+        self.new(client).tfstate
+      end
+
+      def initialize(client)
+        @client = client
+      end
+
+      def tf
+        apply_template(@client, "tf/iam_role_policy_attachment")
+      end
+
+      def tfstate
+        iam_role_policy_attachments.inject({}) do |resources, role_policy_attachment|
+          attributes = {
+            "id" => role_policy_attachment[:name],
+            "policy_arn" => role_policy_attachment[:policy_arn],
+            "role" => role_policy_attachment[:role]
+          }
+          resources["aws_iam_role_policy_attachment.#{module_name_of(role_policy_attachment)}"] = {
+            "type" => "aws_iam_role_policy_attachment",
+            "primary" => {
+              "id" => role_policy_attachment[:name],
+              "attributes" => attributes
+            }
+          }
+
+          resources
+        end
+      end
+
+      private
+
+      def attachment_name_from(role, policy)
+        "#{role.role_name}-#{policy.policy_name}-attachment"
+      end
+
+      def iam_roles
+        @client.list_roles.map(&:roles).flatten
+      end
+
+      def policies_attached_to(role)
+        @client.list_attached_role_policies(role_name: role.role_name).attached_policies
+      end
+
+      def iam_role_policy_attachments
+        iam_roles.map do |role|
+          policies_attached_to(role).map do |policy|
+            {
+              role: role.role_name,
+              policy_arn: policy.policy_arn,
+              name: attachment_name_from(role, policy)
+            }
+          end
+        end.flatten
+      end
+
+      def module_name_of(role_policy_attachment)
+        normalize_module_name(role_policy_attachment[:name])
+      end
+    end
+  end
+end

lib/terraforming/template/tf/iam_role_policy_attachment.erb

@@ -0,0 +1,7 @@
+<% iam_role_policy_attachments.each do |role_policy_attachment| -%>
+resource "aws_iam_role_policy_attachment" "<%= module_name_of(role_policy_attachment) %>" {
+    policy_arn = "<%= role_policy_attachment[:policy_arn] %>"
+    role       = "<%= role_policy_attachment[:role] %>"
+}
+
+<% end -%>

spec/lib/terraforming/cli_spec.rb

@@ -190,6 +190,13 @@ module Terraforming
         it_behaves_like "CLI examples"
       end
 
+      describe "iamrpa" do
+        let(:klass)   { Terraforming::Resource::IAMRolePolicyAttachment }
+        let(:command) { :iamrpa }
+
+        it_behaves_like "CLI examples"
+      end
+
       describe "iamu" do
         let(:klass)   { Terraforming::Resource::IAMUser }
         let(:command) { :iamu }

spec/lib/terraforming/resource/iam_role_policy_attachment_spec.rb

@@ -0,0 +1,90 @@
+require "spec_helper"
+
+module Terraforming
+  module Resource
+    describe IAMRolePolicyAttachment do
+      let(:client) do
+        Aws::IAM::Client.new(stub_responses: true)
+      end
+
+      let(:roles) do
+        [
+          {
+            path: "/",
+            role_name: "hoge_role",
+            role_id: "ABCDEFGHIJKLMN1234567",
+            arn: "arn:aws:iam::123456789012:role/hoge_role",
+            create_date: Time.parse("2015-04-01 12:34:56 UTC"),
+            assume_role_policy_document: "%7B%22Version%22%3A%222008-10-17%22%2C%22Statement%22%3A%5B%7B%22Sid%22%3A%22%22%2C%22Effect%22%3A%22Allow%22%2C%22Principal%22%3A%7B%22Service%22%3A%22ec2.amazonaws.com%22%7D%2C%22Action%22%3A%22sts%3AAssumeRole%22%7D%5D%7D"
+          },
+        ]
+      end
+
+      let(:list_attached_role_policies_hoge) do
+        {
+          attached_policies: [
+            {
+              policy_name: "hoge_policy",
+              policy_arn: "arn:aws:iam::123456789012:policy/hoge-policy"
+            },
+            {
+              policy_name: "fuga_policy",
+              policy_arn: "arn:aws:iam::345678901234:policy/fuga-policy"
+            }
+          ]
+        }
+      end
+
+      before do
+        client.stub_responses(:list_roles, roles: roles)
+        client.stub_responses(:list_attached_role_policies, list_attached_role_policies_hoge)
+      end
+
+      describe ".tf" do
+        it "should generate tf" do
+          expect(described_class.tf(client: client)).to eq <<~EOS
+            resource "aws_iam_role_policy_attachment" "hoge_role-hoge_policy-attachment" {
+                policy_arn = "arn:aws:iam::123456789012:policy/hoge-policy"
+                role       = "hoge_role"
+            }
+
+            resource "aws_iam_role_policy_attachment" "hoge_role-fuga_policy-attachment" {
+                policy_arn = "arn:aws:iam::345678901234:policy/fuga-policy"
+                role       = "hoge_role"
+            }
+
+          EOS
+        end
+      end
+
+      describe ".tfstate" do
+        it "should generate tfstate" do
+          expect(described_class.tfstate(client: client)).to eq({
+            "aws_iam_role_policy_attachment.hoge_role-hoge_policy-attachment" => {
+              "type" => "aws_iam_role_policy_attachment",
+              "primary" => {
+                "id" => "hoge_role-hoge_policy-attachment",
+                "attributes" => {
+                  "id" => "hoge_role-hoge_policy-attachment",
+                  "policy_arn" => "arn:aws:iam::123456789012:policy/hoge-policy",
+                  "role" => "hoge_role"
+                }
+              }
+            },
+            "aws_iam_role_policy_attachment.hoge_role-fuga_policy-attachment" => {
+              "type" => "aws_iam_role_policy_attachment",
+              "primary" => {
+                "id" => "hoge_role-fuga_policy-attachment",
+                "attributes" => {
+                  "id" => "hoge_role-fuga_policy-attachment",
+                  "policy_arn" => "arn:aws:iam::345678901234:policy/fuga-policy",
+                  "role" => "hoge_role"
+                }
+              }
+            }
+         })
+        end
+      end
+    end
+  end
+end