Add a read_json_file utility to the GovukGuix:Job class

This will be useful when reading data from the store, including from
remote machines.

1 files changed, 19 insertions, 0 deletions

diff --git a/app/jobs/govuk_guix/job.rb b/app/jobs/govuk_guix/job.rb
index 2a028d6..342eb9d 100644
--- a/app/jobs/govuk_guix/job.rb
+++ b/app/jobs/govuk_guix/job.rb
@@ -44,6 +44,25 @@ class GovukGuix::Job < Que::Job
     end
   end
 
+  def read_json_file(filename, from_remote_host: nil)
+    if from_remote_host
+      command = [
+        'ssh',
+        from_remote_host,
+        'cat',
+        filename
+      ]
+
+      stdout_str, status = Open3.capture2(*command)
+
+      puts "STATUS: #{status}"
+
+      stdout_str
+    else
+      JSON.parse(File.read(filename))
+    end
+  end
+
   def hash_to_arguments(hash)
     hash.map do |(key, value)|
       transformed_key = key.tr('_', '-')