[PATCH] Add a credential-helper for KDE

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This Python script plugs into the credentials API
of Git to ask the user for passwords with a nice
KDE password dialog.

The password is saved in the KWallet.

Signed-off-by: Lukas Sandström <luksan@xxxxxxxxx>
---

Here is a credentials-helper for KDE. You need to have PyKDE installed to use it.

See Documentation/gitcredentials.txt for more info.

 .../git-kde-credentials-helper.py                  |  122 ++++++++++++++++++++
 1 files changed, 122 insertions(+), 0 deletions(-)
 create mode 100755 contrib/kde-credetials-helper/git-kde-credentials-helper.py

diff --git a/contrib/kde-credetials-helper/git-kde-credentials-helper.py b/contrib/kde-credetials-helper/git-kde-credentials-helper.py
new file mode 100755
index 0000000..8d3be4d
--- /dev/null
+++ b/contrib/kde-credetials-helper/git-kde-credentials-helper.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+# encoding=utf-8
+#
+# Copyright 2011, Lukas Sandström
+#
+# Licensed under the GPL version 2.
+
+import sys, commands
+from PyQt4.QtCore import QString
+from PyKDE4.kdecore import i18n, ki18n, KAboutData, KCmdLineArgs, KCmdLineOptions
+from PyKDE4.kdeui import KApplication, KWallet, KPasswordDialog
+
+appName     = "git-kde-credentials-helper"
+catalog     = ""
+programName = ki18n ("Git KDE credentials helper")
+version     = "0.1"
+description = ki18n ("Credentials storage helper for Git")
+license     = KAboutData.License_GPL_V2
+copyright   = ki18n ("(c) 2011 Lukas Sandström")
+text        = ki18n ("none")
+homePage    = "http://www.git-scm.com";
+bugEmail    = "luksan@xxxxxxxxx"
+
+aboutData   = KAboutData (appName, catalog, programName, version, description,
+                          license, copyright, text, homePage, bugEmail)
+
+class CredentialHelper(KApplication):
+    def __init__(self, token, username = None, desc = None, reject = False):
+        super(CredentialHelper, self).__init__()
+        self.password = None
+        self.username = username
+        self.save_password = False
+        self.token = token
+        self.desc = desc
+
+        if not self.token:
+            return
+
+        self.open_wallet()
+
+        if reject:
+            self.wallet.removeEntry(QString(token))
+            return
+
+        if not self.check_wallet():
+            self.ask_password_dialog()
+        
+        if self.save_password:
+            self.store_password()
+
+        self.output_credentials()
+
+    def output_credentials(self):
+        if self.username:
+            print "username=" + self.username
+        if self.password:
+            print "password=" + self.password
+
+    def store_password(self):
+        self.wallet.writeMap(QString(self.token),
+            {QString("username") : QString(self.username),
+             QString("password") : QString(self.password)})
+
+    def open_wallet(self):
+        self.wallet = KWallet.Wallet.openWallet(
+            KWallet.Wallet.LocalWallet(), 0, KWallet.Wallet.Synchronous)
+        if not self.wallet.isOpen():
+            return None
+        if not self.wallet.hasFolder("GitCredentials"):
+            self.wallet.createFolder("GitCredentials")
+        self.wallet.setFolder("GitCredentials")
+
+    def check_wallet(self):
+        (res, data) = self.wallet.readMap(self.token)
+        if res != 0:
+            return None
+        try:
+            self.username = data[QString("username")]
+            self.password = data[QString("password")]
+        except KeyError:
+            return None
+        return self.username and self.password
+
+    def ask_password_dialog(self):
+        dlg = KPasswordDialog(None,
+            KPasswordDialog.KPasswordDialogFlag(
+                KPasswordDialog.ShowKeepPassword |
+                KPasswordDialog.ShowUsernameLine))
+        if self.desc:
+            desc = self.desc
+        else:
+            desc = self.token
+        dlg.setPrompt(i18n("Please enter username and password for %s" % (desc)))
+        dlg.setUsername(self.username)
+        dlg.setKeepPassword(True)
+        if not dlg.exec_():
+            return
+        self.username = dlg.username()
+        self.password = dlg.password()
+        self.save_password = dlg.keepPassword()
+
+def main():    
+    KCmdLineArgs.init(sys.argv, aboutData)
+    
+    options = KCmdLineOptions()
+    options.add("unique <token>", ki18n("Unique token identifying the credential"))
+    options.add("description <desc>", ki18n("Human readable description of the credential"))
+    options.add("username <username>", ki18n("Requested username"))
+    options.add("reject", ki18n("Purge credential"))    
+    
+    KCmdLineArgs.addCmdLineOptions(options)
+    args = KCmdLineArgs.parsedArgs();
+
+    username = args.getOption("username")
+    token = args.getOption("unique")
+    desc = args.getOption("description")
+    reject = args.isSet("reject")
+
+    app = CredentialHelper(token, username, desc, reject)
+
+if __name__ == "__main__":
+    main()
-- 
1.7.6.1
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