Bug 634596 - On Windows, use hardlinks when --enable-chrome-format=symlink is specified. r=ted

config/JarMaker.py

@@ -56,6 +56,9 @@ from datetime import datetime
 from utils import pushback_iter, lockFile
 from Preprocessor import Preprocessor
 from buildlist import addEntriesToListFile
+if sys.platform == "win32":
+  from ctypes import windll, WinError
+  CreateHardLink = windll.kernel32.CreateHardLinkA
 
 __all__ = ['JarMaker']
 
@@ -406,7 +409,7 @@ class JarMaker(object):
       if (m.group('optOverwrite')
           or (getModTime(realsrc) >
               outHelper.getDestModTime(m.group('output')))):
-        if self.outputFormat == 'symlink' and hasattr(os, 'symlink'):
+        if self.outputFormat == 'symlink':
           outHelper.symlink(realsrc, out)
           return
         outf = outHelper.getOutput(out)
@@ -468,7 +471,13 @@ class JarMaker(object):
       except OSError, e:
         if e.errno != errno.ENOENT:
           raise
-      os.symlink(src, out)
+      if sys.platform != "win32":
+        os.symlink(src, out)
+      else:
+        # On Win32, use ctypes to create a hardlink
+        rv = CreateHardLink(out, src, None)
+        if rv == 0:
+          raise WinError()
 
 def main():
   jm = JarMaker()