pure: provide more correct implementation of posixfile for Windows
requires ctypes
Why is posixfile a class?
Because the implementation needs to use the Python library call os.fdopen [1],
which sets the 'name' attribute on the Python file object it creates to the
mostly meaningless string '<fdopen>', since file descriptors don't have a name.
But users of posixfile depend on the name attribute [2] being set to a proper
value, like Python's built-in 'open' function sets it on file objects.
Python file's name attribute is read-only, so we can't just assign to it after
the file object has alrady been created.
To solve this problem, we save the name of the file on a wrapper object,
and delegate the file function calls to the wrapped (private) file object
using __getattr__.
[1] http://docs.python.org/library/os.html#os.fdopen
[2] http://docs.python.org/library/stdtypes.html#file.name
$ hg clone http://localhost:$HGPORT/ copy
abort: error: Connection refused
[255]
$ test -d copy || echo copy: No such file or directory
copy: No such file or directory
$ cat > dumb.py <<EOF
> import BaseHTTPServer, SimpleHTTPServer, os, signal
> def run(server_class=BaseHTTPServer.HTTPServer,
> handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):
> server_address = ('localhost', int(os.environ['HGPORT']))
> httpd = server_class(server_address, handler_class)
> httpd.serve_forever()
> signal.signal(signal.SIGTERM, lambda x: sys.exit(0))
> run()
> EOF
$ python dumb.py 2>/dev/null &
$ echo $! >> $DAEMON_PIDS
give the server some time to start running
$ sleep 1
$ hg clone http://localhost:$HGPORT/foo copy2 2>&1
abort: HTTP Error 404: * (glob)
[255]
$ kill $!