(PUP-10510) Fix sshkeys not being correctly purged

After adding support for composite namevars in version 2.0.0, the module
lost the ability to purge sshkeys. This happens due to Puppet being
unable to correctly match the names and types of the sshkeys to be
purged.

Part of the fix was done in
puppetlabs/puppet#8174, which changes how a
resource is initialized if the provider implements a `title` method.

Additionally, we add the key name and type to be included in the output
shown by `puppet resource`.

Author: GabrielNagy

lib/puppet/provider/sshkey/parsed.rb

@@ -28,6 +28,10 @@ def self.default_mode
     0o644
   end
 
+  def title
+    "#{property_hash[:name]}@#{property_hash[:type]}"
+  end
+
   def self.default_target
     case Facter.value(:operatingsystem)
     when 'Darwin'

lib/puppet/type/sshkey.rb

@@ -12,6 +12,10 @@ def name
       "#{self[:name]}@#{self[:type]}"
     end
 
+    def self.parameters_to_include
+      [:name, :type]
+    end
+
     def self.title_patterns
       [
         [

spec/acceptance/tests/resource/sshkey/purge_spec.rb

@@ -0,0 +1,73 @@
+require 'spec_helper_acceptance'
+
+RSpec.context 'sshkeys: Purge' do
+  let(:keyname) { "pl#{rand(999_999).to_i}" }
+
+  # FIXME: This is bletcherous
+  let(:ssh_known_hosts) { '/etc/ssh/ssh_known_hosts' }
+
+  let(:purge_manifest) do
+    <<-MANIFEST
+    resources { 'sshkey':
+      purge => true,
+    }
+    MANIFEST
+  end
+
+  before(:each) do
+    posix_agents.agents.each do |agent|
+      # The 'cp' might fail because the source file doesn't exist
+      on(
+        agent,
+        "cp -fv #{ssh_known_hosts} /tmp/ssh_known_hosts",
+        acceptable_exit_codes: [0, 1],
+      )
+      cmd = <<-CMD
+echo '' > #{ssh_known_hosts}
+echo '#{keyname} ssh-rsa how_about_the_initial_rsa_key_of_c' >> #{ssh_known_hosts}
+echo '#{keyname} ssh-dss how_about_the_initial_dss_key_of_c' >> #{ssh_known_hosts}
+CMD
+      on(agent, cmd)
+    end
+  end
+
+  after(:each) do
+    posix_agents.each do |agent|
+      # Is it present?
+      rc = on(
+        agent,
+        '[ -e /tmp/ssh_known_hosts ]',
+        accept_all_exit_codes: true,
+      )
+      if rc.exit_code == 0
+        # It's present, so restore the original
+        on(
+          agent,
+          "mv -fv /tmp/ssh_known_hosts #{ssh_known_hosts}",
+          accept_all_exit_codes: true,
+        )
+      else
+        # It's missing, which means there wasn't one to backup; just
+        # delete the one we laid down
+        on(
+          agent,
+          "rm -fv #{ssh_known_hosts}",
+          accept_all_exit_codes: true,
+        )
+      end
+    end
+  end
+
+  posix_agents.each do |agent|
+    it "#{agent} should be able to purge all SSH known host keys" do
+      apply_manifest_on(agent, purge_manifest, catch_failures: true)
+
+      # expect purging to be idempotent
+      apply_manifest_on(agent, purge_manifest, catch_changes: true)
+
+      on(agent, "cat #{ssh_known_hosts}") do |_res|
+        expect(stdout).not_to include('how_about_the_initial')
+      end
+    end
+  end
+end