Add link to public GPG keys on user profile

app/views/users/show.html.haml

@@ -26,6 +26,13 @@
           = link_to new_abuse_report_path(user_id: @user.id, ref_url: request.referer), class: link_classes + 'btn gl-button btn-default btn-icon',
             title: s_('UserProfile|Report abuse'), data: { toggle: 'tooltip', placement: 'bottom', container: 'body' } do
             = sprite_icon('error')
+      - verified_gpg_keys = @user.gpg_keys.select(&:verified?)
+      - if verified_gpg_keys.any?
+        = link_to user_gpg_keys_path,
+          class: link_classes + 'btn btn-default btn-md gl-button btn-icon has-tooltip',
+          title: n_('View public GPG key', 'View public GPG keys', verified_gpg_keys.length),
+          data: { toggle: 'tooltip', placement: 'bottom', container: 'body' } do
+          = sprite_icon('key', css_class: 'gl-button-icon gl-icon')
       - if can?(current_user, :read_user_profile, @user)
         = link_to user_path(@user, rss_url_options), class: link_classes + 'btn gl-button btn-default btn-icon has-tooltip',
           title: s_('UserProfile|Subscribe'), data: { toggle: 'tooltip', placement: 'bottom', container: 'body' } do

config/routes/user.rb

@@ -64,7 +64,7 @@ constraints(::Constraints::UserUrlConstrainer.new) do
   get ':username.keys' => 'users#ssh_keys', constraints: { username: Gitlab::PathRegex.root_namespace_route_regex }
 
   # Get all GPG keys of user
-  get ':username.gpg' => 'users#gpg_keys', constraints: { username: Gitlab::PathRegex.root_namespace_route_regex }
+  get ':username.gpg' => 'users#gpg_keys', as: 'user_gpg_keys', constraints: { username: Gitlab::PathRegex.root_namespace_route_regex }
 
   scope(path: ':username',
         as: :user,

doc/user/project/repository/gpg_signed_commits/index.md

@@ -19,6 +19,11 @@ NOTE:
 The term GPG is used for all OpenPGP/PGP/GPG related material and
 implementations.
 
+To view a user's public GPG key, you can:
+
+- Go to `https://gitlab.example.com/<username>.gpg`.
+- Select **View public GPG keys** (**{key}**) in the top right of the user's profile.
+
 GPG verified tags are not supported yet.
 
 See the [further reading](#further-reading) section for more details on GPG.

locale/gitlab.pot

@@ -36980,6 +36980,11 @@ msgstr ""
 msgid "View project labels"
 msgstr ""
 
+msgid "View public GPG key"
+msgid_plural "View public GPG keys"
+msgstr[0] ""
+msgstr[1] ""
+
 msgid "View replaced file @ "
 msgstr ""
 

spec/features/users/show_spec.rb

@@ -429,4 +429,27 @@ RSpec.describe 'User page' do
       end
     end
   end
+
+  context 'GPG keys' do
+    context 'when user has verified GPG keys' do
+      let_it_be(:user) { create(:user, email: GpgHelpers::User1.emails.first) }
+      let_it_be(:gpg_key) { create(:gpg_key, user: user, key: GpgHelpers::User1.public_key) }
+      let_it_be(:gpg_key2) { create(:gpg_key, user: user, key: GpgHelpers::User1.public_key2) }
+
+      it 'shows link to public GPG keys' do
+        subject
+
+        expect(page).to have_link('View public GPG keys', href: user_gpg_keys_path(user))
+      end
+    end
+
+    context 'when user does not have verified GPG keys' do
+      it 'does not show link to public GPG keys' do
+        subject
+
+        expect(page).not_to have_link('View public GPG key', href: user_gpg_keys_path(user))
+        expect(page).not_to have_link('View public GPG keys', href: user_gpg_keys_path(user))
+      end
+    end
+  end
 end