# HG changeset patch
# User Chris Cannam
# Date 1308857783 -3600
# Node ID 8edf76b57bd9745dabd06793d85b97a8e126b534
# Parent  8530c31536a7b9cc3d5f62bce19df7255d6d4e8d
Alternative approach to asking for username/password

diff -r 8530c31536a7 -r 8edf76b57bd9 easyhg2.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/easyhg2.py	Thu Jun 23 20:36:23 2011 +0100
@@ -0,0 +1,160 @@
+# -*- coding: utf-8 -*-
+#
+#    EasyMercurial
+#
+#    Based on hgExplorer by Jari Korhonen
+#    Copyright (c) 2010 Jari Korhonen
+#    Copyright (c) 2010 Chris Cannam
+#    Copyright (c) 2010 Queen Mary, University of London
+#    
+#    This program is free software; you can redistribute it and/or
+#    modify it under the terms of the GNU General Public License as
+#    published by the Free Software Foundation; either version 2 of the
+#    License, or (at your option) any later version.  See the file
+#    COPYING included with this distribution for more information.
+
+import sys
+
+import urllib, urllib2, urlparse
+
+from mercurial import ui, getpass, util
+try:
+    from mercurial.url import passwordmgr
+except:
+    from mercurial.httprepo import passwordmgr
+
+from mercurial.i18n import _
+
+#!!! do this later? as for Qt? also see notes on demandimport in mercurial_keyring
+import keyring
+
+# The value assigned here may be modified during installation, by
+# replacing its default value with another one.  We can't compare
+# against its default value, because then the comparison text would
+# get modified as well.  So, compare using prefix only.
+#
+easyhg_import_path = 'NO_EASYHG_IMPORT_PATH'
+if not easyhg_import_path.startswith('NO_'):
+    # We have an installation path: append it twice, once with
+    # the Python version suffixed
+    version_suffix = "Py" + str(sys.version_info[0]) + "." + str(sys.version_info[1]);
+    sys.path.append(easyhg_import_path + "/" + version_suffix)
+    sys.path.append(easyhg_import_path)
+
+# Try to load the PyQt4 module that we need.  If this fails, we should
+# bail out later (in uisetup), because if we bail out now, Mercurial
+# will just continue without us and report success.  The invoking
+# application needs to be able to discover whether the module load
+# succeeded or not, so we need to ensure that Mercurial itself returns
+# failure if it didn't.
+#
+easyhg_pyqt_ok = True
+try:
+    from PyQt4 import Qt, QtGui
+except ImportError:
+    easyhg_pyqt_ok = False
+
+easyhg_qtapp = None
+
+def monkeypatch_method(cls):
+    def decorator(func):
+        setattr(cls, func.__name__, func)
+        return func
+    return decorator
+
+def uisetup(ui):
+    if not easyhg_pyqt_ok:
+        raise util.Abort(_('Failed to load PyQt4 module required by easyhg.py'))
+    global easyhg_qtapp
+    easyhg_qtapp = QtGui.QApplication([])
+
+orig_find = passwordmgr.find_user_password
+
+# from mercurial_keyring by Marcin Kasperski
+def canonical_url(authuri):
+    """
+    Strips query params from url. Used to convert urls like
+    https://repo.machine.com/repos/apps/module?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between
+    to
+    https://repo.machine.com/repos/apps/module
+    """
+    parsed_url = urlparse.urlparse(authuri)
+    return "%s://%s%s" % (parsed_url.scheme, parsed_url.netloc,
+                          parsed_url.path)
+
+@monkeypatch_method(passwordmgr)
+def find_user_password(self, realm, authuri):
+
+    if not self.ui.interactive():
+        return orig_find(self, realm, authuri)
+    if not easyhg_pyqt_ok:
+        return orig_find(self, realm, authuri)
+
+    authinfo = urllib2.HTTPPasswordMgrWithDefaultRealm.find_user_password(
+        self, realm, authuri)
+    user, passwd = authinfo
+
+    if user and passwd:
+        return orig_find(self, realm, authuri)
+
+    self.ui.write("want username and/or password for %s\n" % authuri)
+
+    uri = canonical_url(authuri)
+
+    from_keyring = False
+    keyring_key = ''
+    if user and not passwd:
+        keyring_key = '%s@@%s' % (uri, user)
+        self.ui.write("keyring_key is %s" % keyring_key)
+#        passwd = keyring.get_password('Mercurial', keyring_key)
+        self.ui.write("got passwd: %s\n" % passwd)
+        if passwd:
+            from_keyring = True
+
+    dialog = QtGui.QDialog()
+    layout = QtGui.QGridLayout()
+    dialog.setLayout(layout)
+
+    layout.addWidget(QtGui.QLabel(_('Please supply your user name and password for\n%s:') % uri), 0, 0, 1, 2)
+
+    userfield = QtGui.QLineEdit()
+    if user:
+        userfield.setText(user)
+    layout.addWidget(QtGui.QLabel(_('User:')), 1, 0)
+    layout.addWidget(userfield, 1, 1)
+
+    passfield = QtGui.QLineEdit()
+    passfield.setEchoMode(QtGui.QLineEdit.Password)
+    if passwd:
+        userfield.setText(passwd)
+    layout.addWidget(QtGui.QLabel(_('Password:')), 2, 0)
+    layout.addWidget(passfield, 2, 1)
+
+    bb = QtGui.QDialogButtonBox()
+    ok = bb.addButton(bb.Ok)
+    cancel = bb.addButton(bb.Cancel)
+    cancel.setDefault(False)
+    cancel.setAutoDefault(False)
+    ok.setDefault(True)
+    bb.connect(ok, Qt.SIGNAL("clicked()"), dialog, Qt.SLOT("accept()"))
+    bb.connect(cancel, Qt.SIGNAL("clicked()"), dialog, Qt.SLOT("reject()"))
+    layout.addWidget(bb, 3, 0, 1, 2)
+    
+    dialog.setWindowTitle(_('EasyMercurial: Password'))
+    dialog.show()
+    dialog.raise_()
+    ok = dialog.exec_()
+    if ok:
+        self.ui.write('Dialog accepted\n')
+        user = userfield.text()
+        passwd = passfield.text()
+        if passwd and keyring_key != '' and not from_keyring:
+            keyring_key = '%s@@%s' % (uri, user)
+            keyring.set_password('Mercurial', keyring_key, passwd)
+        self.add_password(realm, authuri, user, passwd)
+    else:
+        raise util.Abort(_('password entry cancelled'))
+    return (user, passwd)
+
+
+