[Lit] Fix to prevent creation of "%SystemDrive%" directory on Windows.

This patch propogates the environment variable SYSTEMDRIVE on Windows when
running the unit tests. This prevents the creation of a directory named
"%SystemDrive%" when running the unit tests from FileSystemTest that use the
function llvm::sys::fs::remove_directories which in turn uses SHFileOperationW.
It is within SHFileOperationW that this environment variable may be used and if
undefined causes the creation of a "%SystemDrive%" directory in the current
directory.

Differential Revision: https://reviews.llvm.org/D32910

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302409 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Unit/lit.cfg b/test/Unit/lit.cfg
index 30a5d3f..dac0bf8 100644 (file)
--- a/test/Unit/lit.cfg
+++ b/test/Unit/lit.cfg
@@ -43,6 +43,10 @@ if sys.platform in ['win32', 'cygwin'] and os.path.isdir(config.shlibdir):
     config.environment['PATH'] = os.path.pathsep.join((
             config.shlibdir, config.environment['PATH']))
 
+# Win32 may use %SYSTEMDRIVE% during file system shell operations, so propogate.
+if sys.platform == 'win32' and 'SYSTEMDRIVE' in os.environ:
+    config.environment['SYSTEMDRIVE'] = os.environ['SYSTEMDRIVE']
+
 ###
 
 # Check that the object root is known.