Always guard leaking env variables on Windows with SETLOCAL/ENDOCAL

Windows-only

meteor.bat

@@ -1,5 +1,6 @@
 @echo off
 
+SETLOCAL
 rem only if we are running from a checkout
 IF EXIST "%~dp0\.git" (
   rem verify that we have 7zip in the path
@@ -37,4 +38,5 @@ IF EXIST "%~dp0\.git" (
 SET NODE_PATH=%~dp0\dev_bundle\lib\node_modules
 
 "%~dp0\dev_bundle\bin\node.exe" "%~dp0\tools\main.js" %*
+ENDLOCAL
 

tools/files.js

@@ -1185,11 +1185,13 @@ files._generateScriptLinkToMeteorScript = function (scriptLocation) {
 
   var newScript = [
     "@echo off",
-    "set METEOR_INSTALLATION=%~dp0%",
+    "SETLOCAL",
+    "SET METEOR_INSTALLATION=%~dp0%",
 
     // always convert to Windows path since this function can also be
     // called on Linux or Mac when we are building bootstrap tarballs
     "\"" + scriptLocationConverted + "\" %*",
+    "ENDLOCAL",
     // add a comment with the destination of the link, so it can be read later
     // by files.readLinkToMeteorScript
     "rem " + scriptLocationConverted,

tools/tests/fake-mongod/fake-mongod.bat

@@ -1,10 +1,13 @@
 REM Find the top of the tools tree (not to be confused with the 'tools'
 REM directory in that tree)
-set TOOLS_DIR="%~dp0\..\..\.."
+SETLOCAL
+SET TOOLS_DIR="%~dp0\..\..\.."
 
 REM Find our binary dependencies (node).
-set DEV_BUNDLE="%TOOLS_DIR%\dev_bundle"
+SET DEV_BUNDLE="%TOOLS_DIR%\dev_bundle"
 
 REM Have at it!
-set NODE_PATH="%DEV_BUNDLE%\lib\node_modules"
-"%DEV_BUNDLE%\bin\node" "%~dp0\fake-mongod.js" %*
+SET NODE_PATH="%DEV_BUNDLE%\lib\node_modules"
+"%DEV_BUNDLE%\bin\node" "%~dp0\fake-mongod.js" %*
+ENDLOCAL
+