Mercurial > hg
view mercurial/win32.py @ 13531:67fbe566eff1 stable
subrepo: handle svn tracked/unknown directory collisions
This happens more often than expected. Say you have an svn subrepository with
python code. Python would have generated unknown .pyc files. Now, you rebase
this setup on a revision where a directory containing python code does not
exist. Subversion is first asked to remove this directory when updating, but
will not because it contains untracked items. Then it will have to bring back
the directory after the merge but will fail because it now collides with an
untracked directory.
Using --force is not very elegant but it is much simpler than rewriting our own
purge command for subversion.
author | Patrick Mezard <pmezard@gmail.com> |
---|---|
date | Fri, 04 Mar 2011 14:00:49 +0100 |
parents | 67743d5f49b6 |
children | 930efdc6bfa4 |
line wrap: on
line source
# win32.py - utility functions that use win32 API # # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import encoding import ctypes, errno, os, struct, subprocess _kernel32 = ctypes.windll.kernel32 _BOOL = ctypes.c_long _WORD = ctypes.c_ushort _DWORD = ctypes.c_ulong _LPCSTR = _LPSTR = ctypes.c_char_p _HANDLE = ctypes.c_void_p _HWND = _HANDLE _INVALID_HANDLE_VALUE = -1 # GetLastError _ERROR_SUCCESS = 0 _ERROR_INVALID_PARAMETER = 87 _ERROR_INSUFFICIENT_BUFFER = 122 # WPARAM is defined as UINT_PTR (unsigned type) # LPARAM is defined as LONG_PTR (signed type) if ctypes.sizeof(ctypes.c_long) == ctypes.sizeof(ctypes.c_void_p): _WPARAM = ctypes.c_ulong _LPARAM = ctypes.c_long elif ctypes.sizeof(ctypes.c_longlong) == ctypes.sizeof(ctypes.c_void_p): _WPARAM = ctypes.c_ulonglong _LPARAM = ctypes.c_longlong class _FILETIME(ctypes.Structure): _fields_ = [('dwLowDateTime', _DWORD), ('dwHighDateTime', _DWORD)] class _BY_HANDLE_FILE_INFORMATION(ctypes.Structure): _fields_ = [('dwFileAttributes', _DWORD), ('ftCreationTime', _FILETIME), ('ftLastAccessTime', _FILETIME), ('ftLastWriteTime', _FILETIME), ('dwVolumeSerialNumber', _DWORD), ('nFileSizeHigh', _DWORD), ('nFileSizeLow', _DWORD), ('nNumberOfLinks', _DWORD), ('nFileIndexHigh', _DWORD), ('nFileIndexLow', _DWORD)] # CreateFile _FILE_SHARE_READ = 0x00000001 _FILE_SHARE_WRITE = 0x00000002 _FILE_SHARE_DELETE = 0x00000004 _OPEN_EXISTING = 3 # Process Security and Access Rights _PROCESS_QUERY_INFORMATION = 0x0400 # GetExitCodeProcess _STILL_ACTIVE = 259 # registry _HKEY_CURRENT_USER = 0x80000001L _HKEY_LOCAL_MACHINE = 0x80000002L _KEY_READ = 0x20019 _REG_SZ = 1 _REG_DWORD = 4 class _STARTUPINFO(ctypes.Structure): _fields_ = [('cb', _DWORD), ('lpReserved', _LPSTR), ('lpDesktop', _LPSTR), ('lpTitle', _LPSTR), ('dwX', _DWORD), ('dwY', _DWORD), ('dwXSize', _DWORD), ('dwYSize', _DWORD), ('dwXCountChars', _DWORD), ('dwYCountChars', _DWORD), ('dwFillAttribute', _DWORD), ('dwFlags', _DWORD), ('wShowWindow', _WORD), ('cbReserved2', _WORD), ('lpReserved2', ctypes.c_char_p), ('hStdInput', _HANDLE), ('hStdOutput', _HANDLE), ('hStdError', _HANDLE)] class _PROCESS_INFORMATION(ctypes.Structure): _fields_ = [('hProcess', _HANDLE), ('hThread', _HANDLE), ('dwProcessId', _DWORD), ('dwThreadId', _DWORD)] _DETACHED_PROCESS = 0x00000008 _STARTF_USESHOWWINDOW = 0x00000001 _SW_HIDE = 0 class _COORD(ctypes.Structure): _fields_ = [('X', ctypes.c_short), ('Y', ctypes.c_short)] class _SMALL_RECT(ctypes.Structure): _fields_ = [('Left', ctypes.c_short), ('Top', ctypes.c_short), ('Right', ctypes.c_short), ('Bottom', ctypes.c_short)] class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure): _fields_ = [('dwSize', _COORD), ('dwCursorPosition', _COORD), ('wAttributes', _WORD), ('srWindow', _SMALL_RECT), ('dwMaximumWindowSize', _COORD)] _STD_ERROR_HANDLE = 0xfffffff4L # (DWORD)-12 def _raiseoserror(name): err = ctypes.WinError() raise OSError(err.errno, '%s: %s' % (name, err.strerror)) def _getfileinfo(name): fh = _kernel32.CreateFileA(name, 0, _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, None, _OPEN_EXISTING, 0, None) if fh == _INVALID_HANDLE_VALUE: _raiseoserror(name) try: fi = _BY_HANDLE_FILE_INFORMATION() if not _kernel32.GetFileInformationByHandle(fh, ctypes.byref(fi)): _raiseoserror(name) return fi finally: _kernel32.CloseHandle(fh) def os_link(src, dst): if not _kernel32.CreateHardLinkA(dst, src, None): _raiseoserror(src) def nlinks(name): '''return number of hardlinks for the given file''' return _getfileinfo(name).nNumberOfLinks def samefile(fpath1, fpath2): '''Returns whether fpath1 and fpath2 refer to the same file. This is only guaranteed to work for files, not directories.''' res1 = _getfileinfo(fpath1) res2 = _getfileinfo(fpath2) return (res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber and res1.nFileIndexHigh == res2.nFileIndexHigh and res1.nFileIndexLow == res2.nFileIndexLow) def samedevice(fpath1, fpath2): '''Returns whether fpath1 and fpath2 are on the same device. This is only guaranteed to work for files, not directories.''' res1 = _getfileinfo(fpath1) res2 = _getfileinfo(fpath2) return res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber def testpid(pid): '''return True if pid is still running or unable to determine, False otherwise''' h = _kernel32.OpenProcess(_PROCESS_QUERY_INFORMATION, False, pid) if h: try: status = _DWORD() if _kernel32.GetExitCodeProcess(h, ctypes.byref(status)): return status.value == _STILL_ACTIVE finally: _kernel32.CloseHandle(h) return _kernel32.GetLastError() != _ERROR_INVALID_PARAMETER def lookup_reg(key, valname=None, scope=None): ''' Look up a key/value name in the Windows registry. valname: value name. If unspecified, the default value for the key is used. scope: optionally specify scope for registry lookup, this can be a sequence of scopes to look up in order. Default (CURRENT_USER, LOCAL_MACHINE). ''' adv = ctypes.windll.advapi32 byref = ctypes.byref if scope is None: scope = (_HKEY_CURRENT_USER, _HKEY_LOCAL_MACHINE) elif not isinstance(scope, (list, tuple)): scope = (scope,) for s in scope: kh = _HANDLE() res = adv.RegOpenKeyExA(s, key, 0, _KEY_READ, ctypes.byref(kh)) if res != _ERROR_SUCCESS: continue try: size = _DWORD(600) type = _DWORD() buf = ctypes.create_string_buffer(size.value + 1) res = adv.RegQueryValueExA(kh.value, valname, None, byref(type), buf, byref(size)) if res != _ERROR_SUCCESS: continue if type.value == _REG_SZ: # never let a Unicode string escape into the wild return encoding.tolocal(buf.value.encode('UTF-8')) elif type.value == _REG_DWORD: fmt = '<L' s = ctypes.string_at(byref(buf), struct.calcsize(fmt)) return struct.unpack(fmt, s)[0] finally: adv.RegCloseKey(kh.value) def executable_path(): '''return full path of hg.exe''' size = 600 buf = ctypes.create_string_buffer(size + 1) len = _kernel32.GetModuleFileNameA(None, ctypes.byref(buf), size) if len == 0: raise ctypes.WinError() elif len == size: raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER) return buf.value def getuser(): '''return name of current user''' adv = ctypes.windll.advapi32 size = _DWORD(300) buf = ctypes.create_string_buffer(size.value + 1) if not adv.GetUserNameA(ctypes.byref(buf), ctypes.byref(size)): raise ctypes.WinError() return buf.value _SIGNAL_HANDLER = ctypes.WINFUNCTYPE(_BOOL, _DWORD) _signal_handler = [] def set_signal_handler(): '''Register a termination handler for console events including CTRL+C. python signal handlers do not work well with socket operations. ''' def handler(event): _kernel32.ExitProcess(1) if _signal_handler: return # already registered h = _SIGNAL_HANDLER(handler) _signal_handler.append(h) # needed to prevent garbage collection if not _kernel32.SetConsoleCtrlHandler(h, True): raise ctypes.WinError() _WNDENUMPROC = ctypes.WINFUNCTYPE(_BOOL, _HWND, _LPARAM) def hidewindow(): user32 = ctypes.windll.user32 def callback(hwnd, pid): wpid = _DWORD() user32.GetWindowThreadProcessId(hwnd, ctypes.byref(wpid)) if pid == wpid.value: user32.ShowWindow(hwnd, _SW_HIDE) return False # stop enumerating windows return True pid = _kernel32.GetCurrentProcessId() user32.EnumWindows(_WNDENUMPROC(callback), pid) def termwidth(): # cmd.exe does not handle CR like a unix console, the CR is # counted in the line length. On 80 columns consoles, if 80 # characters are written, the following CR won't apply on the # current line but on the new one. Keep room for it. width = 79 # Query stderr to avoid problems with redirections screenbuf = _kernel32.GetStdHandle( _STD_ERROR_HANDLE) # don't close the handle returned if screenbuf is None or screenbuf == _INVALID_HANDLE_VALUE: return width csbi = _CONSOLE_SCREEN_BUFFER_INFO() if not _kernel32.GetConsoleScreenBufferInfo( screenbuf, ctypes.byref(csbi)): return width width = csbi.srWindow.Right - csbi.srWindow.Left return width def spawndetached(args): # No standard library function really spawns a fully detached # process under win32 because they allocate pipes or other objects # to handle standard streams communications. Passing these objects # to the child process requires handle inheritance to be enabled # which makes really detached processes impossible. si = _STARTUPINFO() si.cb = ctypes.sizeof(_STARTUPINFO) si.dwFlags = _STARTF_USESHOWWINDOW si.wShowWindow = _SW_HIDE pi = _PROCESS_INFORMATION() env = '' for k in os.environ: env += "%s=%s\0" % (k, os.environ[k]) if not env: env = '\0' env += '\0' args = subprocess.list2cmdline(args) # Not running the command in shell mode makes python26 hang when # writing to hgweb output socket. comspec = os.environ.get("COMSPEC", "cmd.exe") args = comspec + " /c " + args res = _kernel32.CreateProcessA( None, args, None, None, False, _DETACHED_PROCESS, env, os.getcwd(), ctypes.byref(si), ctypes.byref(pi)) if not res: raise ctypes.WinError() return pi.dwProcessId