Mercurial > hg
view mercurial/win32.py @ 13750:7eb82f88e157
# User Dan Villiom Podlaski Christiansen <danchr@gmail.com>
# Date 1289564504 -3600
# Node ID b75264c15cc888cf38c3c7b8f619801e3c2589c7
# Parent 89b2e5d940f669e590096c6be70eee61c9172fff
revsets: overload the branch() revset to also take a branch name.
This should only change semantics in the specific case of a tag/branch
conflict where the tag wasn't done on the branch with the same
name. Previously, branch(whatever) would resolve to the branch of the
tag in that case, whereas now it will resolve to the branch of the
name. The previous behaviour, while documented, seemed very
counter-intuitive to me.
An alternate approach would be to introduce a new revset such as
branchname() or namedbranch(). While this would retain backwards
compatibility, the distinction between it and branch() would not be
readily apparent to users. The most intuitive behaviour would be to
have branch(x) require 'x' to be a branch name, and something like
branchof(x) or samebranch(x) do what branch(x) currently
does. Unfortunately, our backwards compatibility guarantees prevent us
from doing that.
Please note that while 'hg tag' guards against shadowing a branch, 'hg
branch' does not. Besides, even if it did, that wouldn't solve the
issue of conversions with such tags and branches...
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Wed, 23 Mar 2011 19:28:16 -0500 |
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