1 files changed, 44 insertions, 0 deletions
diff --git a/app/finders/packages/go/version_finder.rb b/app/finders/packages/go/version_finder.rb
new file mode 100644
index 00000000000..8e2fab8ba35
--- /dev/null
+++ b/app/finders/packages/go/version_finder.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module Packages
+  module Go
+    class VersionFinder
+      include Gitlab::Golang
+
+      attr_reader :mod
+
+      def initialize(mod)
+        @mod = mod
+      end
+
+      def execute
+        @mod.project.repository.tags
+          .filter { |tag| semver_tag? tag }
+          .map    { |tag| @mod.version_by(ref: tag) }
+          .filter { |ver| ver.valid? }
+      end
+
+      def find(target)
+        case target
+        when String
+          if pseudo_version? target
+            semver = parse_semver(target)
+            commit = pseudo_version_commit(@mod.project, semver)
+            Packages::Go::ModuleVersion.new(@mod, :pseudo, commit, name: target, semver: semver)
+          else
+            @mod.version_by(ref: target)
+          end
+
+        when Gitlab::Git::Ref
+          @mod.version_by(ref: target)
+
+        when ::Commit, Gitlab::Git::Commit
+          @mod.version_by(commit: target)
+
+        else
+          raise ArgumentError.new 'not a valid target'
+        end
+      end
+    end
+  end
+end