add hg and python

1 files changed, 144 insertions, 0 deletions

diff --git a/sys/src/cmd/hg/mercurial/win32.py b/sys/src/cmd/hg/mercurial/win32.py
new file mode 100644
index 000000000..08e35b011
--- /dev/null
+++ b/sys/src/cmd/hg/mercurial/win32.py
@@ -0,0 +1,144 @@
+# 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, incorporated herein by reference.
+
+"""Utility functions that use win32 API.
+
+Mark Hammond's win32all package allows better functionality on
+Windows. This module overrides definitions in util.py. If not
+available, import of this module will fail, and generic code will be
+used.
+"""
+
+import win32api
+
+import errno, os, sys, pywintypes, win32con, win32file, win32process
+import winerror
+import osutil, encoding
+from win32com.shell import shell, shellcon
+
+def os_link(src, dst):
+    try:
+        win32file.CreateHardLink(dst, src)
+        # CreateHardLink sometimes succeeds on mapped drives but
+        # following nlinks() returns 1. Check it now and bail out.
+        if nlinks(src) < 2:
+            try:
+                win32file.DeleteFile(dst)
+            except:
+                pass
+            # Fake hardlinking error
+            raise OSError(errno.EINVAL, 'Hardlinking not supported')
+    except pywintypes.error, details:
+        raise OSError(errno.EINVAL, 'target implements hardlinks improperly')
+    except NotImplementedError: # Another fake error win Win98
+        raise OSError(errno.EINVAL, 'Hardlinking not supported')
+
+def nlinks(pathname):
+    """Return number of hardlinks for the given file."""
+    try:
+        fh = win32file.CreateFile(pathname,
+            win32file.GENERIC_READ, win32file.FILE_SHARE_READ,
+            None, win32file.OPEN_EXISTING, 0, None)
+        res = win32file.GetFileInformationByHandle(fh)
+        fh.Close()
+        return res[7]
+    except pywintypes.error:
+        return os.lstat(pathname).st_nlink
+
+def testpid(pid):
+    '''return True if pid is still running or unable to
+    determine, False otherwise'''
+    try:
+        handle = win32api.OpenProcess(
+            win32con.PROCESS_QUERY_INFORMATION, False, pid)
+        if handle:
+            status = win32process.GetExitCodeProcess(handle)
+            return status == win32con.STILL_ACTIVE
+    except pywintypes.error, details:
+        return details[0] != winerror.ERROR_INVALID_PARAMETER
+    return True
+
+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).
+    '''
+    try:
+        from _winreg import HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, \
+            QueryValueEx, OpenKey
+    except ImportError:
+        return None
+
+    if scope is None:
+        scope = (HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE)
+    elif not isinstance(scope, (list, tuple)):
+        scope = (scope,)
+    for s in scope:
+        try:
+            val = QueryValueEx(OpenKey(s, key), valname)[0]
+            # never let a Unicode string escape into the wild
+            return encoding.tolocal(val.encode('UTF-8'))
+        except EnvironmentError:
+            pass
+
+def system_rcpath_win32():
+    '''return default os-specific hgrc search path'''
+    proc = win32api.GetCurrentProcess()
+    try:
+        # This will fail on windows < NT
+        filename = win32process.GetModuleFileNameEx(proc, 0)
+    except:
+        filename = win32api.GetModuleFileName(0)
+    # Use mercurial.ini found in directory with hg.exe
+    progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini')
+    if os.path.isfile(progrc):
+        return [progrc]
+    # else look for a system rcpath in the registry
+    try:
+        value = win32api.RegQueryValue(
+                win32con.HKEY_LOCAL_MACHINE, 'SOFTWARE\\Mercurial')
+        rcpath = []
+        for p in value.split(os.pathsep):
+            if p.lower().endswith('mercurial.ini'):
+                rcpath.append(p)
+            elif os.path.isdir(p):
+                for f, kind in osutil.listdir(p):
+                    if f.endswith('.rc'):
+                        rcpath.append(os.path.join(p, f))
+        return rcpath
+    except pywintypes.error:
+        return []
+
+def user_rcpath_win32():
+    '''return os-specific hgrc search path to the user dir'''
+    userdir = os.path.expanduser('~')
+    if sys.getwindowsversion()[3] != 2 and userdir == '~':
+        # We are on win < nt: fetch the APPDATA directory location and use
+        # the parent directory as the user home dir.
+        appdir = shell.SHGetPathFromIDList(
+            shell.SHGetSpecialFolderLocation(0, shellcon.CSIDL_APPDATA))
+        userdir = os.path.dirname(appdir)
+    return [os.path.join(userdir, 'mercurial.ini'),
+            os.path.join(userdir, '.hgrc')]
+
+def getuser():
+    '''return name of current user'''
+    return win32api.GetUserName()
+
+def set_signal_handler_win32():
+    """Register a termination handler for console events including
+    CTRL+C. python signal handlers do not work well with socket
+    operations.
+    """
+    def handler(event):
+        win32process.ExitProcess(1)
+    win32api.SetConsoleCtrlHandler(handler)
+