Re: Thoughts on layering of multiple config files


Rob Molholm <robert....@...>
 

Hey folks,

Although implementation of issue #282 below is still ideal, I have been testing a combination of FUSE and OCIO, using FUSE as a way to abstract database queries, presenting results as "virtual" OCIO configurations to the calling application (using the filesystem hierarchy for baked context).   This does have its limitations, but it is one way to centrally manage several configurations.  FUSE also works across multiple platforms, which is a bonus.

In production we're pretty much doing as mentioned-- we have a baseline OCIO configuration, which is carried over and modified by a script for each project, and also baked for contexts within a project where the OCIO contexts do not work

...and speaking of including/merging configurations- has it ever been floated to add an OCIO config file as one of the supported file types of OCIOFileTransform?    there'd have to be an additional argument to specify a specific color space (or look) out of the included file, but this could be a way of bringing in known complex/grouped transforms, rather than relying on the basics in a single file.  The source path of the file transform would be subject to the current context, so you definitely could get crazy with this.  Not sure how dependancies from the included color space would be resolved either...

-rob


 

On Jun 17, 2013, at 6:12 PM, Jeremy Selan <jeremy...@...> wrote:

Hi.

Unfortunately the ability to layer ocio configurations isnt implemented yet, though we do consider it a really good idea.  See this existing issue for more information, or to add your thoughts:

In the meantime, we handle this at SPI using python scripts to build configurations for each show. The code is generally similar to this...

Not quite as elegant as being dynamically read on the fly, but it has suited our needs to a high enough degree that this has been a low priority for us in the interim.

-- Jeremy



On Mon, Jun 17, 2013 at 12:41 PM, <natha...@...> wrote:
Hey all,

I hope I'm not spawning a duplicate discussion thread; I did some searching around, but couldn't find anything.

I'm wondering if there has been any discussion about allowing multiple config files to be used to build a single runtime configuration by layering multiple (possibly sparse) definitions on disk. Similar to the PATH environment variable, the final configuration would be built from the "bottom" of the OCIO variable's path list up, allowing files of higher precedence to replace existing definitions within the configuration (to facilitate overrides), as well as add items to it. One goal of this would be to make it easy to propagate changes to "static" pieces of a core OCIO configuration across many shows.

How are people currently handling the possibility of changes to what might be considered the "core" of your OCIO configuration? One option seems to be to have the build script for each show's configuration load a "baseline" config and then amend it or replace certain items (assuming this is possible)...

Thanks for any thoughts,

-Nathan

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