CodeMirror in IPython

We carry a mostly unmodified copy of CodeMirror. The current version we use is (please update this information when updating versions):

CodeMirror2 4e244d252a26a2dba5446d44eb46adfb3c7f356a , tag : v2.32

The following CodeMirror commits have been cherry-picked into the source:

• 4ec8a34 Pressing Up while on the first line should move cursor to (0,0)

The current politics is not to ships the following folders of CodeMirrors :

• doc/
• demo/
• test/

The only changes we've applied so far are these:

git show 271e17dd21f4f0c802a573b412e430998a70a78c

commit 271e17dd21f4f0c802a573b412e430998a70a78c
Author: Matthias BUSSONNIER <bussonniermatthias@gmail.com>
Date:   Mon Jul 23 14:53:21 2012 +0200

    patch SingleOperator in CodeMirror2

diff --git a/IPython/frontend/html/notebook/static/codemirror/mode/python/python.js b/IPython/frontend/html/notebook/static/code
index d6888e8..201da51 100644
--- a/IPython/frontend/html/notebook/static/codemirror/mode/python/python.js
+++ b/IPython/frontend/html/notebook/static/codemirror/mode/python/python.js
@@ -4,8 +4,11 @@ CodeMirror.defineMode("python", function(conf, parserConf) {
     function wordRegexp(words) {
         return new RegExp("^((" + words.join(")|(") + "))\\b");
     }
-
-    var singleOperators = new RegExp("^[\\+\\-\\*/%&|\\^~<>!]");
+
+    // IPython-specific changes: add '?' as recognized character.
+    var singleOperators = new RegExp("^[\\+\\-\\*/%&|\\^~<>!\\?]");
+    // End IPython changes.
+
     var singleDelimiters = new RegExp('^[\\(\\)\\[\\]\\{\\}@,:`=;\\.]');
     var doubleOperators = new RegExp("^((==)|(!=)|(<=)|(>=)|(<>)|(<<)|(>>)|(//)|(\\*\\*))");
     var doubleDelimiters = new RegExp("^((\\+=)|(\\-=)|(\\*=)|(%=)|(/=)|(&=)|(\\|=)|(\\^=))");

In practice it's just a one-line change, adding \? to singleOperators, surrounded by a comment.

that you should be able to apply after updating codemirror with

git cherry-pick 271e17

We'll turn this into a proper patchset if it ever gets more complicated than this, but for now this note should be enough.