On Windows, don't try to create relative paths across different drives

test/win/generator-output-different-drive/gyptest-generator-output-different-drive.py

Index: test/win/generator-output-different-drive/gyptest-generator-output-different-drive.py
===================================================================
--- test/win/generator-output-different-drive/gyptest-generator-output-different-drive.py	(revision 0)
+++ test/win/generator-output-different-drive/gyptest-generator-output-different-drive.py	(revision 0)
@@ -0,0 +1,40 @@
+#!/usr/bin/env python

[borenet, 2013/07/16 15:16:39]

This is a rough sketch of what a test might look like.  It's probably fragile,
since we need to do the drive mapping.  Unfortunately, I haven't been able to
run this, since all of the tests are failing for me on Windows with:

Error: could not find devenv
Exception AttributeError: "'TestGypNinja' object has no attribute '_dirlist'" in
<bound method TestGypNinja.__del__ of 1f9c0f0> ignored

Any ideas?

+
+# Copyright (c) 2013 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Test that the generator output can be written to a different drive on Windows.
+"""
+
+import TestGyp
+import subprocess
+import sys
+
+
+if sys.platform == 'win32':
+  test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
+
+  def GetFirstFreeDriveLetter():
+    """ Returns the first unused Windows drive letter in [A, Z] """
+    all_letters = [c for c in string.uppercase]
+    in_use = win32api.GetLogicalDriveStrings()
+    free = list(set(all_letters) - set(in_use))
+    return free[0]
+
+  output_dir = os.path.join('different-drive', 'output')
+  output_drive = GetFirstFreeDriveLetter()
+  subprocess.call(['net', 'use', '%c:' % output_drive,
+      '\\\\localhost\%s' % os.path.abspath(output_drive).replace(':', '$')])
+  try:
+    test.run_gyp('prog.gyp', '--generator-output=%s' % (
+        os.path.join(output_drive, 'output')))
+
+    test.build('prog.gyp', test.ALL)
+    test.must_exist(os.path.join(output_drive, 'output', 'Debug',
+                                 'program.exe'))
+
+    test.pass_test()
+  finally:
+    subprocess.call(['net', 'use', '%c:' % output_drive, '/delete'])