[R-SIG-Mac] Cocoa gui with embedded R framework

[Simon Urbanek]

On Mar 23, 2005, at 1:40 PM, stefano iacus wrote:

> Simon? Could this be done at run-time (for this specific version of  
> R.app of Kjell) by setting it relative to R.app path before  
> kickstarting R?

Yes, in fact the Cocoa GUI has that single setenv line commented out,  
but still present :). The rationale now is to not hard-code it in the  
code, although it is possible. There are still some issues with all  
the R_HOME detection and linking behavior. There are two places where  
the paths have to match, which still allows for inconsistency if  
someone messes with the settings: One is the binary itself and the  
other is the Info.plist. The binary is linked with a full path to  
libR.dylib, so that is the R version that will get started, but then  
if Info.plist contradicts, then its libraries and files will be used  
as this is what R_HOME is set to. The most "clean" way would be to  
determine on run-time which library is loaded and set R_HOME  
correspondingly. To my shame I have to admit that I posted the  
relevant code that does exactly this long time ago, but it was  
actually never used. I should have a look at that.

> In any case, I would be pleased to know if is works after moving  
> around R.app on the system or even after installing a package and  
> move again R.app around.

It won't really solve the duality issue: linked path and R_HOME.  
Technically it's the same as the current Info.plist solution. Both  
allow relocation of R.app, but none of them allows relocation of the  
framework.

Cheers,
Simon