From 465a9be63548dcd7d5d36296413485b38436dc29 Mon Sep 17 00:00:00 2001
From: Dale Wijnand <dale.wijnand@gmail.com>
Date: Thu, 16 Mar 2017 19:42:17 +0000
Subject: [PATCH] Add -Dsbt.skip.version.write=true opt-out

---
 main/src/main/scala/sbt/Main.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/main/src/main/scala/sbt/Main.scala b/main/src/main/scala/sbt/Main.scala
index 19d093af3..d679610f0 100644
--- a/main/src/main/scala/sbt/Main.scala
+++ b/main/src/main/scala/sbt/Main.scala
@@ -26,7 +26,8 @@ final class xMain extends xsbti.AppMain {
       import BasicCommandStrings.runEarly
       import BuiltinCommands.{ initialize, defaults }
       import CommandStrings.{ BootCommand, DefaultsCommand, InitCommand }
-      setSbtVersion(configuration.baseDirectory(), configuration.provider().id().version())
+      if (!java.lang.Boolean.getBoolean("sbt.skip.version.write"))
+        setSbtVersion(configuration.baseDirectory(), configuration.provider().id().version())
       runManaged(initialState(configuration,
         Seq(defaults, early),
         runEarly(DefaultsCommand) :: runEarly(InitCommand) :: BootCommand :: Nil)