https://git.ruby-lang.org/ruby.git/commit/?id=47144f91a1

From 47144f91a176f263f870e05347d5b426efc40293 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 30 Jul 2019 16:44:29 +0900
Subject: Separate VCS::GIT#upstream


diff --git a/tool/lib/vcs.rb b/tool/lib/vcs.rb
index dd6162c..2ecbfbe 100644
--- a/tool/lib/vcs.rb
+++ b/tool/lib/vcs.rb
@@ -578,9 +578,7 @@ class VCS https://github.com/ruby/ruby/blob/trunk/tool/lib/vcs.rb#L578
       IO.copy_stream(r, path)
     end
 
-    def commit(opts = {})
-      args = [COMMAND, "push"]
-      args << "-n" if dryrun
+    def upstream
       (branch = cmd_read(%W"#{COMMAND} symbolic-ref --short HEAD")).chomp!
       (upstream = cmd_read(%W"#{COMMAND} branch --list --format=%(upstream) #{branch}")).chomp!
       while ref = upstream[%r"\Arefs/heads/(.*)", 1]
@@ -589,7 +587,14 @@ class VCS https://github.com/ruby/ruby/blob/trunk/tool/lib/vcs.rb#L587
       unless %r"\Arefs/remotes/([^/]+)/(.*)" =~ upstream
         raise "Upstream not found"
       end
-      args << $1 << "HEAD:#$2"
+      [$1, $2]
+    end
+
+    def commit(opts = {})
+      args = [COMMAND, "push"]
+      args << "-n" if dryrun
+      remote, branch = upstream
+      args << remote << "HEAD:#{branch}"
       if dryrun?
         STDERR.puts(args.inspect)
         return true
-- 
cgit v0.10.2


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