1 files changed, 46 insertions, 0 deletions
diff --git a/lib/gitlab/dependency_linker/cargo_toml_linker.rb b/lib/gitlab/dependency_linker/cargo_toml_linker.rb
new file mode 100644
index 00000000000..57e0a5f4699
--- /dev/null
+++ b/lib/gitlab/dependency_linker/cargo_toml_linker.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module DependencyLinker
+    class CargoTomlLinker < BaseLinker
+      self.file_type = :cargo_toml
+
+      def link
+        return highlighted_text unless toml
+
+        super
+      end
+
+      private
+
+      def link_dependencies
+        link_dependencies_at("dependencies")
+        link_dependencies_at("dev-dependencies")
+        link_dependencies_at("build-dependencies")
+      end
+
+      def link_dependencies_at(type)
+        dependencies = toml[type]
+        return unless dependencies
+
+        dependencies.each do |name, value|
+          link_toml(name, value, type) do |name|
+            "https://crates.io/crates/#{name}"
+          end
+        end
+      end
+
+      def link_toml(key, value, type, &url_proc)
+        if value.is_a? String
+          link_regex(/^(?<name>#{key})\s*=\s*"#{value}"/, &url_proc)
+        else
+          link_regex(/^\[#{type}\.(?<name>#{key})]/, &url_proc)
+        end
+      end
+
+      def toml
+        @toml ||= TomlRB.parse(plain_text) rescue nil
+      end
+    end
+  end
+end