Re: Review: Inital pass at searchpath impl

Malcolm Humphreys <malcolmh...@...>

* I like supporting only strings for now. In the future, I can also
see numbers being supported (such as allowing for CDL blocks that rely
on envvars), but this can be added as needed.
It would also be super nice if the CDLTransform supported the full Color Correction Collection (CCC) in the CDL spec, where you could have something along the lines of '!<CDLTransform> { src: '/path/to/basegrades.ccc', id: '${SEQ}_${SHOT}_balance' }'.
* The FileTransform will probably have to get a bit smarter. Say
you're using a pershot lut, and for some shots you dont want any such
table. This could be solved by either not installing a lut in the
expected location, or by installing an identity lut. Which is
preferable? In the current implementation, if a lut is not found
this is always an error condition. Maybe we should introduce on the
FilmTransform a 'silent error mode', where this would just skip the
application of that specific LUT?
Keep the system simple let it error, it should be up to the user to setup the searchpath so that an identity lut is found if other paths fail to resolve to a lut.

It might be an idea to make this case not an exception, but a error which gets sent through some kind or error handler.

* The "globals" pre-declaration could also define an optional default
(used if the envvar is not set). If the envvar is not set, and no
default is specified, any references to the global variable would
probably be an error.


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