Monday, April 26, 2010

Find ubuntu release and version on the command line



cat /etc/lsb-release

Thursday, April 22, 2010

Configure git colors and output format

# Add color
git config color.ui auto

# Format for log, whatschanged
git log --pretty=

Monday, April 19, 2010

Installing OSQA

While installing OSQA, an opensource clone of StackExchange (Stackoverflow) written in Python (Django), I encountered a few gotchas

Installation instructions:


1. Install mod-wsgi for Apache2

sudo apt-get install libapache2-mod-wsgi
2. Commented code in Apache.conf

The following commented code seems to screw up restarting of apache

WSGISocketPrefix /path/to/socket/sock #must be readable and writable by apache
WSGIPythonHome /usr/local #must be readable by apache
WSGIPythonEggs /var/python/eggs #must be readable and writable by apache
Just get rid of them.

3. WSGI script in documentation

As documented in

That pipe screws things up. I'm not exactly familar with python so maybe it's deprecated in Python 2.6? Anyways just get rid of it.

os.environ['DJANGO_SETTINGS_MODULE'] = 'osqa.settings'
4. Table migration

Apparently if you followed the recommendation to use South for migration you'll soon find that it FAILS. Yikes! Search their Q&A (meta) provides an answer.

Just do

./ syncdb --all
./ migrate --fake

Sunday, April 11, 2010

Recover deleted branches in Git

Accidentally deleted a branch? No problem. Git reflog to the rescue.

git checkout -b recover_lost_commits

git reflog

e9c17db... HEAD@{0}: checkout: moving from stable to master
e9c17db... HEAD@{1}: checkout: moving from stable to e9c17dbfffd79f2bf30530e144c43c0f47322826^0
318c0f2... HEAD@{2}: checkout: moving from master to stable
e9c17db... HEAD@{3}: commit: Forgot to add images to CSS and adjusted positions.
3baab51... HEAD@{4}: commit: Added new buttons.

git merge e9c17db

Wednesday, April 7, 2010

Using minitest for speedier unit tests

sudo gem install minitest # Install MiniTest
sudo gem install minitest_tu_shim # Install Test::Unit shim
sudo use_minitest yes


If you've freezed rails into a project then trying to script/server will throw the following error.

.../vendor/rails/activesupport/lib/active_support/dependencies.rb:445:in `load_missing_constant': uninitialized constant Test (NameError)