https://git.ruby-lang.org/ruby.git/commit/?id=49cb2345c6

From 49cb2345c657c805762a368cf46a1cbb75c6ca92 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 13 Jul 2020 00:30:44 +0900
Subject: sync_default_gems.rb: Added `list` subcommand


diff --git a/tool/sync_default_gems.rb b/tool/sync_default_gems.rb
index 5c70b3c..51ac521 100644
--- a/tool/sync_default_gems.rb
+++ b/tool/sync_default_gems.rb
@@ -470,6 +470,13 @@ when "up" https://github.com/ruby/ruby/blob/trunk/tool/sync_default_gems.rb#L470
   end
 when "all"
   $repositories.keys.each{|gem| sync_default_gems(gem.to_s)}
+when "list"
+  ARGV.shift
+  pattern = Regexp.new(ARGV.join('|'))
+  $repositories.each_pair do |name, gem|
+    next unless pattern =~ name or pattern =~ gem
+    printf "%-15s https://github.com/%s\n", name, gem
+  end
 when nil, "-h", "--help"
     puts <<-HELP
 \e[1mSync with upstream code of default libraries\e[0m
@@ -482,6 +489,12 @@ when nil, "-h", "--help" https://github.com/ruby/ruby/blob/trunk/tool/sync_default_gems.rb#L489
 
 \e[1mPick a commit range from the upstream repository\e[0m
   ruby #$0 rubygems 97e9768612..9e53702832
+
+\e[1mList known libraries\e[0m
+  ruby #$0 list
+
+\e[1mList known libraries matching with patterns\e[0m
+  ruby #$0 list read
     HELP
 
   exit
-- 
cgit v0.10.2


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