Add a Guix module

Which contains an available_locally? function.

4 files changed, 52 insertions, 2 deletions

diff --git a/app/controllers/govuk_guix/data_snapshots_controller.rb b/app/controllers/govuk_guix/data_snapshots_controller.rb
new file mode 100644
index 0000000..95bee66
--- /dev/null
+++ b/app/controllers/govuk_guix/data_snapshots_controller.rb
@@ -0,0 +1,25 @@
+# GOV.UK Mini Environment Admin
+# Copyright © 2018  Christopher Baines <mail@cbaines.net>
+#
+# This file is part of the GOV.UK Mini Environment Admin.
+#
+# The GOV.UK Mini Environment Admin is free software: you can
+# redistribute it and/or modify it under the terms of the GNU Affero
+# General Public License as published by the Free Software Foundation,
+# either version 3 of the License, or (at your option) any later
+# version.
+#
+# The GOV.UK Mini Environment Admin is distributed in the hope that it
+# will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with the GOV.UK Mini Environment Admin.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+class GovukGuix::DataSnapshotsController < ApplicationController
+  def show
+    @data_snapshot = GovukGuix::DataSnapshot.find(params['id'])
+  end
+end
diff --git a/app/controllers/govuk_guix/revisions_controller.rb b/app/controllers/govuk_guix/revisions_controller.rb
index f7c7f56..838bdae 100644
--- a/app/controllers/govuk_guix/revisions_controller.rb
+++ b/app/controllers/govuk_guix/revisions_controller.rb
@@ -27,7 +27,7 @@ class GovukGuix::RevisionsController < ApplicationController
     revision = params.require('revision')
 
     # Attempt to check if this can be performed locally
-    if File.exist? '/var/guix/daemon-socket/socket'
+    if Guix.available_locally?
       options = {}
     else
       # Assume that the AWS backend is in use
diff --git a/app/services/govuk_guix/build_mini_environment.rb b/app/services/govuk_guix/build_mini_environment.rb
index 6de6b81..9bce8b5 100644
--- a/app/services/govuk_guix/build_mini_environment.rb
+++ b/app/services/govuk_guix/build_mini_environment.rb
@@ -36,7 +36,7 @@ module GovukGuix::BuildMiniEnvironment
 
     remote_host = options[:run_remotely_on_host]
 
-    if remote_host && File.exist?('/var/guix/daemon-socket/socket')
+    if remote_host && Guix.available_locally?
       # Copy the revision to the remote host, to ensure it's available
       # there
       run_command(
diff --git a/lib/guix.rb b/lib/guix.rb
new file mode 100644
index 0000000..a9cc7b0
--- /dev/null
+++ b/lib/guix.rb
@@ -0,0 +1,25 @@
+# GOV.UK Mini Environment Admin
+# Copyright © 2018  Christopher Baines <mail@cbaines.net>
+#
+# This file is part of the GOV.UK Mini Environment Admin.
+#
+# The GOV.UK Mini Environment Admin is free software: you can
+# redistribute it and/or modify it under the terms of the GNU Affero
+# General Public License as published by the Free Software Foundation,
+# either version 3 of the License, or (at your option) any later
+# version.
+#
+# The GOV.UK Mini Environment Admin is distributed in the hope that it
+# will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public
+# License along with the GOV.UK Mini Environment Admin.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+module Guix
+  def self.available_locally?
+    File.exist?('/var/guix/daemon-socket/socket')
+  end
+end