[changeset] ~/.octaverc overwrites OCTAVE_PATH!!

[Ben Abbott]

On Dec 23, 2008, at 10:17 PM, Ben Abbott wrote:
> <snip>

This changeset is intended to avoid having the path statement in  
octaverc (generated by savepath.m) over-write the paths originating  
from the environment and/or from the command line, the next time  
octave is run.

This is done by

(1) Having savepath.m place an addpath(...) rather than path(...)  
statement in octaverc.

(2) Removing the command-line & environment paths from the working  
path prior to writing the addpath statement to octaverc. In the event  
that pathdef() is empty, only the path from the environment is removed  
from the working path (which is assumed to be generated via the  
procedure used by run-octave)

(3) As knowledge of the command_line_path was needed by savepath.m,  
load-path.cc and load-path.h were modified to add the new function  
commandlinepath().

It may also be desired to remove the path associated with pathdef()  
from the working path prior to writing the addpath statement to  
octaverc.

By doing so only the portion added by the user should remain. This  
would also make upgrading from one version of octave to another more  
convenient (on my Mac the path to the core functions includes the  
version number). This would be my personal preference.

However, this will make it much more likely that the ordering of the  
path will not be preserved for subsequent executions of octave.  
Meaning that the user specified portions would either be added at the  
beginning or the end, but would not show up both ways.

As that may be a relatively significant compatibility issue, the path  
associated with pathdef() is still saved to octaverc.

My local octave package I had been using to install a working copy of  
octave build from mercurial broke rather recently. I've not yet been  
able to resolve the problem. Thus, I'm presently running a fresh build  
with these changes via run-octave.

  Ben

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