Add custom linter for inline JavaScript to haml_lint (!9742)

2 files changed, 15 insertions, 0 deletions

diff --git a/lib/haml_lint/inline_javascript.rb b/lib/haml_lint/inline_javascript.rb
new file mode 100644
index 00000000000..f3ddcbb9c95
--- /dev/null
+++ b/lib/haml_lint/inline_javascript.rb
@@ -0,0 +1,14 @@
+require 'haml_lint/haml_visitor'
+require 'haml_lint/linter'
+require 'haml_lint/linter_registry'
+
+module HamlLint
+  class Linter::InlineJavaScript < Linter
+    include LinterRegistry
+
+    def visit_filter(node)
+      return unless node.filter_type == 'javascript'
+      record_lint(node, 'Inline JavaScript is discouraged (https://docs.gitlab.com/ee/development/gotchas.html#do-not-use-inline-javascript-in-views)')
+    end
+  end
+end
diff --git a/lib/tasks/haml-lint.rake b/lib/tasks/haml-lint.rake
index 609dfaa48e3..ad2d034b0b4 100644
--- a/lib/tasks/haml-lint.rake
+++ b/lib/tasks/haml-lint.rake
@@ -1,5 +1,6 @@
 unless Rails.env.production?
   require 'haml_lint/rake_task'
+  require 'haml_lint/inline_javascript'
 
   HamlLint::RakeTask.new
 end