https://git.ruby-lang.org/ruby.git/commit/?id=06454a9457

From 06454a9457e3c6fd819eb1ad6a9aa5b32eb083b1 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 5 Jan 2021 21:24:10 +0900
Subject: sync_default_gems.rb: added -a option

The option to merge all commits since the commit merged in the
last prefixed commit.

diff --git a/tool/sync_default_gems.rb b/tool/sync_default_gems.rb
index 6db42b6..1fed998 100644
--- a/tool/sync_default_gems.rb
+++ b/tool/sync_default_gems.rb
@@ -353,6 +353,11 @@ def sync_default_gems_with_commits(gem, ranges, edit: nil) https://github.com/ruby/ruby/blob/trunk/tool/sync_default_gems.rb#L353
   end
   system(*%W"git fetch --no-tags #{gem}")
 
+  if ranges == true
+    log = IO.popen(%W"git log --fixed-strings --grep=[#{repo}] -n1 --format=%B", &:read)
+    ranges = ["#{log[%r[https://github\.com/#{Regexp.quote(repo)}/commit/(\h+)\s*\Z], 1]}..#{gem}/master"]
+  end
+
   commits = ranges.flat_map do |range|
     unless range.include?("..")
       range = "#{range}~1..#{range}"
@@ -523,13 +528,21 @@ when nil, "-h", "--help" https://github.com/ruby/ruby/blob/trunk/tool/sync_default_gems.rb#L528
 
   exit
 else
-  if ARGV[0] == "-e"
-    edit = true
-    ARGV.shift
+  while /\A-/ =~ ARGV[0]
+    case ARGV[0]
+    when "-e"
+      edit = true
+      ARGV.shift
+    when "-a"
+      auto = true
+      ARGV.shift
+    end
   end
   gem = ARGV.shift
   if ARGV[0]
     sync_default_gems_with_commits(gem, ARGV, edit: edit)
+  elsif auto
+    sync_default_gems_with_commits(gem, true, edit: edit)
   else
     sync_default_gems(gem)
   end
-- 
cgit v0.10.2


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