Update metrics dashboard API to load yml from repo

Updates the EnvironmentController#metrics_dashboard endpoint
to support a "dashboard" param, which can be used to specify
the filepath of a dashboard configuration from a project
repository. Dashboard configurations are expected to be
stored in .gitlab/dashboards/.

Updates dashboard post-processing steps to exclude custom
metrics, which should only display on the system dashboard.

1 files changed, 8 insertions, 1 deletions

diff --git a/app/models/repository.rb b/app/models/repository.rb
index 8b728c4f6b2..f495a03ad8e 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -39,7 +39,8 @@ class Repository
                       changelog license_blob license_key gitignore
                       gitlab_ci_yml branch_names tag_names branch_count
                       tag_count avatar exists? root_ref has_visible_content?
-                      issue_template_names merge_request_template_names xcode_project?).freeze
+                      issue_template_names merge_request_template_names
+                      metrics_dashboard_paths xcode_project?).freeze
 
   # Methods that use cache_method but only memoize the value
   MEMOIZED_CACHED_METHODS = %i(license).freeze
@@ -57,6 +58,7 @@ class Repository
     avatar: :avatar,
     issue_template: :issue_template_names,
     merge_request_template: :merge_request_template_names,
+    metrics_dashboard: :metrics_dashboard_paths,
     xcode_config: :xcode_project?
   }.freeze
 
@@ -602,6 +604,11 @@ class Repository
   end
   cache_method :merge_request_template_names, fallback: []
 
+  def metrics_dashboard_paths
+    Gitlab::Metrics::Dashboard::Finder.find_all_paths_from_source(project)
+  end
+  cache_method :metrics_dashboard_paths
+
   def readme
     head_tree&.readme
   end