trac-admin should alter completion binding on Mac OS X Leopard

[mirko-trac@…]

Python-2.5.1 on Mac OS X Leopard does not use the standard readline library, but ​libedit. In ​ipython the following solution is used:

# Test to see if libedit is being used instead of GNU readline.
# Thanks to Boyd Waters for this patch.
import readline as _rl
uses_libedit = False
if sys.platform == 'darwin' and have_readline:
    import commands
    (status, result) = commands.getstatusoutput( "otool -L %s | grep libedit" % _rl.__file__ )
    if status == 0 and len(result) > 0:
        # we are bound to libedit - new in Leopard
        _rl.parse_and_bind("bind ^I rl_complete")
        print "Leopard libedit detected."
        uses_libedit = True

[sid]

If possible, it would be useful to have this in the form of a patch (using svn diff or the like). That would make it much easier for people to evaluate the patch, and then apply it to trunk.

[mirko-trac@…]

Hello,

I attach a patch against source:sandbox/multirepos as svn-diff. As console.py has not changed this should be appliable against the trunk as well.

Regards Mirko

[mirko-trac@…]

HG-Repo with the patch: ​http://friedenhagen.net:8000/trac/sandbox/multirepos/rev/d0d03c4b66cc

[Christian Boos]

Isn't that rather a bug from the readline package on that platform? You'd certainly prefer a fix that will work for each of your shell-like applications, rather than having to patch each one. Have you tried doing that in your PYTHONSTARTUP file, like described in this ​blog entry?

On a somewhat related note, thanks to the links you've posted, I found out that IPython's ​PyReadline works quite well with TracAdmin on Windows (no history support, though).

[mirko-trac@…]

Replying to cboos:

Isn't that rather a bug from the readline package on that platform? You'd certainly prefer a fix that will work for each of your shell-like applications, rather than having to patch each one. Have you tried doing that in your PYTHONSTARTUP file, like described in this ​blog entry?

OK, then I propose to use a fix suggested in ​http://docs.python.org/tut/node4.html#SECTION004240000000000000000, see attachment:pythonstartup.patch​

[Christian Boos]

Milestone 2.0 deleted

[Ryan J Ollos]

Command completion works fine on OSX 10.12.6 with Python 2.7. I have Python and readline installed via Brew. The readline package is recommended in Brew:

$brew info python
python: stable 2.7.13 (bottled), HEAD
Interpreted, interactive, object-oriented programming language
https://www.python.org
/usr/local/Cellar/python/2.7.13_1 (3,767 files, 52.3MB) *
  Poured from bottle on 2017-07-18 at 09:24:23
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/python.rb
==> Dependencies
Build: sphinx-doc ✘, pkg-config ✔
Required: openssl ✔
Recommended: readline ✔, sqlite ✔, gdbm ✔
Optional: sphinx-doc ✘, tcl-tk ✘, berkeley-db@4 ✘
==> Options
[...]
--without-readline
    Build without readline support
[...]

As best I can tell, the issue reported in this ticket only occurs with Python 2.5. There's no documented support for libedit on ​Python 2.5, but support appears to be documented for ​Python 2.6 and ​Python 2.7. However, see also comments in ​trac-dev:wBiEpCNH654/gU33rJTOAwAJ.

If there are any issue encountered on OSX with Python 2.7, please open a new ticket. We can at least document what is needed to get command completion, whether that be installing readline, ​pypi:pyreadline or ​pypi:gnureadline.