1 files changed, 24 insertions, 1 deletions
diff --git a/deps/npm/node_modules/node-gyp/gyp/pylib/gyp/common.py b/deps/npm/node_modules/node-gyp/gyp/pylib/gyp/common.py
index 834a8e6c95..f595c947bc 100644
--- a/deps/npm/node_modules/node-gyp/gyp/pylib/gyp/common.py
+++ b/deps/npm/node_modules/node-gyp/gyp/pylib/gyp/common.py
@@ -9,6 +9,9 @@ import os.path
 import re
 import tempfile
 import sys
+import subprocess
+
+PY3 = bytes != str
 
 
 # A minimal memoizing decorator. It'll blow up if the args aren't immutable,
@@ -337,11 +340,16 @@ def WriteOnDiff(filename):
   class Writer(object):
     """Wrapper around file which only covers the target if it differs."""
     def __init__(self):
+      # On Cygwin remove the "dir" argument because `C:` prefixed paths are treated as relative,
+      # consequently ending up with current dir "/cygdrive/c/..." being prefixed to those, which was
+      # obviously a non-existent path, for example: "/cygdrive/c/<some folder>/C:\<my win style abs path>".
+      # See https://docs.python.org/2/library/tempfile.html#tempfile.mkstemp for more details
+      base_temp_dir = "" if IsCygwin() else os.path.dirname(filename)
       # Pick temporary file.
       tmp_fd, self.tmp_path = tempfile.mkstemp(
           suffix='.tmp',
           prefix=os.path.split(filename)[1] + '.gyp.',
-          dir=os.path.split(filename)[0])
+          dir=base_temp_dir)
       try:
         self.tmp_file = os.fdopen(tmp_fd, 'wb')
       except Exception:
@@ -394,6 +402,9 @@ def WriteOnDiff(filename):
         os.unlink(self.tmp_path)
         raise
 
+    def write(self, s):
+      self.tmp_file.write(s.encode('utf-8'))
+
   return Writer()
 
 
@@ -608,3 +619,15 @@ def CrossCompileRequested():
           os.environ.get('AR_target') or
           os.environ.get('CC_target') or
           os.environ.get('CXX_target'))
+
+def IsCygwin():
+  try:
+    out = subprocess.Popen("uname",
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT)
+    stdout, stderr = out.communicate()
+    if PY3:
+      stdout = stdout.decode("utf-8")
+    return "CYGWIN" in str(stdout)
+  except Exception:
+    return False