[rubygems/rubygems] Let gem sources be more clear about which sources it's displaying

ruby/rubygems@2afefa4a48

Author: deivid-rodriguez

lib/rubygems/commands/sources_command.rb

@@ -128,7 +128,7 @@ def description # :nodoc:
 Without any arguments the sources lists your currently configured sources:
 
   $ gem sources
-  *** CURRENT SOURCES ***
+  *** NO CONFIGURED SOURCES, DEFAULT SOURCES LISTED BELOW ***
 
   https://rubygems.org
 
@@ -164,10 +164,18 @@ def description # :nodoc:
   end
 
   def list # :nodoc:
-    say "*** CURRENT SOURCES ***"
+    if configured_sources
+      header = "*** CURRENT SOURCES ***"
+      list = configured_sources
+    else
+      header = "*** NO CONFIGURED SOURCES, DEFAULT SOURCES LISTED BELOW ***"
+      list = Gem.sources
+    end
+
+    say header
     say
 
-    Gem.sources.each do |src|
+    list.each do |src|
       say src
     end
   end
@@ -224,4 +232,10 @@ def remove_cache_file(desc, path) # :nodoc:
       say "*** Unable to remove #{desc} source cache ***"
     end
   end
+
+  private
+
+  def configured_sources
+    Gem.configuration.sources
+  end
 end

test/rubygems/test_gem_commands_sources_command.rb

@@ -32,7 +32,7 @@ def test_execute
     end
 
     expected = <<-EOF
-*** CURRENT SOURCES ***
+*** NO CONFIGURED SOURCES, DEFAULT SOURCES LISTED BELOW ***
 
 #{@gem_repo}
     EOF
@@ -476,7 +476,7 @@ def test_execute_list
     end
 
     expected = <<-EOF
-*** CURRENT SOURCES ***
+*** NO CONFIGURED SOURCES, DEFAULT SOURCES LISTED BELOW ***
 
 #{@gem_repo}
     EOF