More on the Rx Toolkit change in 5.2.0

Some of you on Windows have found the Rx Toolkit wasn't working
in Komodo 5.2.0.  The old Rx toolkit used to run in process,
which meant if you entered an expense regex, or entered a lot
of text, Komodo would be unresponsive until it was finished.
Additionally, it accepted only the Python regex language.

We've started to change Rx to make it more modular.  The
first step was to move the pattern-matching to an external
Python process.  The next step will be to show you how a
particular regex works with other languages.  This is a
good way of answering a question like whether the
language you're using supports something like the "(?<)"
assertion.

Unfortunately, I did all my testing on fully-loaded dev
machines, and we ended up shipping an Rx that has a
dependency on ActivePython.  In particular, this affects
Windows and the OS X versions.

There are two ways to fix this on Windows, two on OS X.

1. On either platform, install ActivePython 2.6 from
http://downloads.activestate.com/ActivePython/.  If
you're on OS X you don't even need to put it in your
path -- The Komodo Python is looking for a library,
not the executable.

2. On Windows, run the following commands so the
python.exe the Rx toolkit shells out to can find
the correct python DLL:

* Bring up a command window, or use the file manager

* cd to "c:\Program Files\ActiveState Komodo IDE 5"  (or where ever you
installed Komodo)

* cd lib

* copy mozilla\python26.dll python\python26.dll

* Restart the Rx Toolkit (a Komodo restart shouldn't be necessary).

3. On OS X, bring up a terminal window, cd into the Komodo app dir
at .../Komodo IDE.app/Contents/MacOS/components, and make the
following change in the file koDirs.py:

* find the get_pythonExe function

* change the code so it reads like so:

....def get_pythonExe(self):
........if sys.platform == "darwin":
............pythonExe = join(self.get_mozBinDir(), "mozpython")
........elif sys.platform == "win32"   # leave the rest alone

Those leading periods are meant to show you how many spaces
need to be at the start of each line.  Python is whitespace-sensitive;
an error here can result in Komodo failing to run completely.

=====

I'm sorry about the inconvenience.  It turns out there are only
two other areas in Komodo where we invoke Komodo's internal
python.exe this way, and they have the same problems, but they're
used far less often than the Rx Toolkit, evidently (they're
in the Komodo Extension and Firefox Extension project templates,
if you're wondering).

- Eric Promislow
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