Neaten up SSH handling

Explicitly use the specified private key where possible. Also, use a
struct for the user, address and private key.

1 files changed, 5 insertions, 1 deletions

diff --git a/app/services/govuk_guix/build_mini_environment.rb b/app/services/govuk_guix/build_mini_environment.rb
index a0361b0..8e2d912 100644
--- a/app/services/govuk_guix/build_mini_environment.rb
+++ b/app/services/govuk_guix/build_mini_environment.rb
@@ -37,12 +37,16 @@ module GovukGuix::BuildMiniEnvironment
     remote_host = options[:run_remotely_on_host]
 
     if remote_host && Guix.available_locally?
+      # TODO: This doesn't use the private key specified by the
+      # backend, so it'll only work when the default SSH key has
+      # access to the remote host.
+
       # Copy the revision to the remote host, to ensure it's available
       # there
       run_command(
         'guix',
         'copy',
-        "--to=#{remote_host}",
+        "--to=#{remote_host.user_at_address}",
         mini_environment.govuk_guix_revision.store_path
       )
     end