set NOT_CONTENT_INDEXED on .hg dir (issue2694)

when running on Windows

mercurial/hg.py

@@ -143,7 +143,7 b' def share(ui, source, dest=None, update='
 
     if not os.path.isdir(root):
         os.mkdir(root)
-    os.mkdir(roothg)
+    util.makedir(roothg, notindexed=True)
 
     requirements = ''
     try:
@@ -281,7 +281,7 b' def clone(ui, source, dest=None, pull=Fa'
                 dir_cleanup.dir_ = hgdir
             try:
                 dest_path = hgdir
-                os.mkdir(dest_path)
+                util.makedir(dest_path, notindexed=True)
             except OSError, inst:
                 if inst.errno == errno.EEXIST:
                     dir_cleanup.close()

mercurial/localrepo.py

@@ -47,7 +47,7 b' class localrepository(repo.repository):'
             if create:
                 if not os.path.exists(path):
                     util.makedirs(path)
-                os.mkdir(self.path)
+                util.makedir(self.path, notindexed=True)
                 requirements = ["revlogv1"]
                 if self.ui.configbool('format', 'usestore', True):
                     os.mkdir(os.path.join(self.path, "store"))

mercurial/util.py

@@ -438,6 +438,9 b' def checksignature(func):'
 
     return check
 
+def makedir(path, notindexed):
+    os.mkdir(path)
+
 def unlinkpath(f):
     """unlink and remove the directory if it is empty"""
     os.unlink(f)

mercurial/win32.py

@@ -58,6 +58,7 b' class _BY_HANDLE_FILE_INFORMATION(ctypes'
 
 # SetFileAttributes
 _FILE_ATTRIBUTE_NORMAL = 0x80
+_FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x2000
 
 # Process Security and Access Rights
 _PROCESS_QUERY_INFORMATION = 0x0400
@@ -365,3 +366,8 b' def unlink(f):'
             # Leaking a tempfile is the lesser evil than aborting here and
             # leaving some potentially serious inconsistencies.
             pass
+
+def makedir(path, notindexed):
+    os.mkdir(path)
+    if notindexed:
+        _kernel32.SetFileAttributesA(path, _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)