Implement live streaming for execute resources

This brings live streaming of execute resource output to the
output formatters. It also adds a mechanism for checking to
see if an output formatter is in use through the event dispatch
system.

It adds a new configuration option, "always_stream_execute", which
does what it says on the tin.

2 files changed, 7 insertions, 0 deletions

diff --git a/chef-config/lib/chef-config/config.rb b/chef-config/lib/chef-config/config.rb
index 069f0ed6c0..6a028e9564 100644
--- a/chef-config/lib/chef-config/config.rb
+++ b/chef-config/lib/chef-config/config.rb
@@ -271,6 +271,9 @@ module ChefConfig
     # Using `force_logger` causes chef to default to logger output when STDOUT is a tty
     default :force_logger, false
 
+    # Using 'always_stream_output' will have Chef always stream the execute output
+    default :always_stream_output, false
+
     default :http_retry_count, 5
     default :http_retry_delay, 5
     default :interval, nil
diff --git a/chef-config/spec/unit/config_spec.rb b/chef-config/spec/unit/config_spec.rb
index d99ff428fb..fc8528ad46 100644
--- a/chef-config/spec/unit/config_spec.rb
+++ b/chef-config/spec/unit/config_spec.rb
@@ -264,6 +264,10 @@ RSpec.describe ChefConfig::Config do
           end
         end
 
+        it "ChefConfig::Config[:always_stream_output] defaults to false" do
+          expect(ChefConfig::Config[:always_stream_output]).to eq(false)
+        end
+
         it "ChefConfig::Config[:file_backup_path] defaults to /var/chef/backup" do
           allow(ChefConfig::Config).to receive(:cache_path).and_return(primary_cache_path)
           backup_path = is_windows ? "#{primary_cache_path}\\backup" : "#{primary_cache_path}/backup"