https://git.ruby-lang.org/ruby.git/commit/?id=b659c1b92f

From b659c1b92f3d5f251a3436073cd60d955d5fc457 Mon Sep 17 00:00:00 2001
From: bronzdoc <lsagastume1990@g...>
Date: Sun, 29 Sep 2019 08:41:49 -0600
Subject: [rubygems/rubygems] Add Gem::Dependency#identity method

https://github.com/rubygems/rubygems/commit/05146bb2fd

diff --git a/lib/rubygems/dependency.rb b/lib/rubygems/dependency.rb
index b09a5fe..0c58815 100644
--- a/lib/rubygems/dependency.rb
+++ b/lib/rubygems/dependency.rb
@@ -334,4 +334,18 @@ class Gem::Dependency https://github.com/ruby/ruby/blob/trunk/lib/rubygems/dependency.rb#L334
     matches.first
   end
 
+  def identity
+    if prerelease?
+      if specific?
+        :complete
+      else
+        :abs_latest
+      end
+    elsif latest_version?
+      :latest
+    else
+      :released
+    end
+  end
+
 end
diff --git a/test/rubygems/test_gem_dependency.rb b/test/rubygems/test_gem_dependency.rb
index bf2f065..0caab10 100644
--- a/test/rubygems/test_gem_dependency.rb
+++ b/test/rubygems/test_gem_dependency.rb
@@ -385,4 +385,11 @@ class TestGemDependency < Gem::TestCase https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_dependency.rb#L385
     assert_match "Could not find 'b' (= 2.0) among 1 total gem(s)", e.message
   end
 
+  def test_identity
+    assert_equal dep("a", "= 1").identity, :released
+    assert_equal dep("a", "= 1.a").identity, :complete
+    assert_equal dep("a", " >= 1.a").identity, :abs_latest
+    assert_equal dep("a").identity, :latest
+  end
+
 end
-- 
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