https://git.ruby-lang.org/ruby.git/commit/?id=bcf51dd763

From bcf51dd76332bc28ee75494c51828a36774ff99f Mon Sep 17 00:00:00 2001
From: bronzdoc <lsagastume1990@g...>
Date: Sun, 18 Aug 2019 14:04:08 -0600
Subject: [rubygems/rubygems] Improve gemspec assignment and error message

https://github.com/rubygems/rubygems/commit/dc70c5a192

diff --git a/lib/rubygems/commands/build_command.rb b/lib/rubygems/commands/build_command.rb
index 27d8140..bc37ab9 100644
--- a/lib/rubygems/commands/build_command.rb
+++ b/lib/rubygems/commands/build_command.rb
@@ -62,10 +62,8 @@ Gems can be saved to a specified filename with the output option: https://github.com/ruby/ruby/blob/trunk/lib/rubygems/commands/build_command.rb#L62
 
   private
 
-  def build_gem(gemspec = get_one_optional_argument)
-    unless File.exist?(gemspec)
-      gemspec += ".gemspec" if File.exist?(gemspec + ".gemspec")
-    end
+  def build_gem(gem_name = get_one_optional_argument)
+    gemspec = File.exist?(gem_name) ? gem_name : "#{gem_name}.gemspec"
 
     if File.exist?(gemspec)
       spec = Gem::Specification.load(gemspec)
diff --git a/test/rubygems/test_gem_commands_build_command.rb b/test/rubygems/test_gem_commands_build_command.rb
index 58fc964..6d44d48 100644
--- a/test/rubygems/test_gem_commands_build_command.rb
+++ b/test/rubygems/test_gem_commands_build_command.rb
@@ -189,7 +189,7 @@ class TestGemCommandsBuildCommand < Gem::TestCase https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_commands_build_command.rb#L189
     end
 
     assert_equal '', @ui.output
-    assert_equal "ERROR:  Gemspec file not found: some_gem\n", @ui.error
+    assert_equal "ERROR:  Gemspec file not found: some_gem.gemspec\n", @ui.error
   end
 
   def test_execute_outside_dir
-- 
cgit v0.10.2


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