This repo exists to experiment with some ideas around data and schema transformation, where CUE is used to describe the transformation.
The experiment is implemented in the form of a command,
github.com/cue-exp/cuetransform. It has a single subcommand apply which is
used to apply a series of transformations to some concrete data.
Some notes:
- This experiment is limited to concrete data (for now). But it's very much in scope to consider how it could be applied to schema.
- Every transformation after the first transformation is effectively limited to
checking against the
_constraint. Which is not very helpful, and not really in the spirit of CUE. Later versions of this experiment will look to work with transforming schemas, so that subsequent transformations can be vetted (using a special static check). If we ever get to a position of supporting something like delete as a builtin, then regularcue vetwould be sufficient to check a sequence of transformations (noting they would not be supplied as a list, rather a sequence of expressions).
The main place to look for an understanding of what it can/can't do are the
testscript tests in the tests directory.
The basic test is a good starting
point.
TODO: write this section.
- Very much work-in-progress.
- Code is very hacky - the result of a train journey's worth of thinking and effort.
- Lots of context missing in this README.
Please raise issues with any feedback.