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cue / cue / 93bffe3195d405427f6fbfab39e2e521d2bbebc4
commit93bffe3195d405427f6fbfab39e2e521d2bbebc4[log] [tgz]
authorMarcel van Lohuizen <mpvl@golang.org>Wed Mar 13 16:11:24 2019 +0100
committerMarcel van Lohuizen <mpvl@google.com>Thu Mar 14 14:54:34 2019 +0000
tree4fe44bc895d301a7971d27aa8d2d6a86a7f71920
parent9ccf273f91ad9a492c10ef7a2e58a63e06253392 [diff]
cue: fix subsumption for regular expressions

Change-Id: I9ef579b37440ac82bef5943fb5e29356a5ca87e6
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/1640
Reviewed-by: Marcel van Lohuizen <mpvl@google.com>
2 files changed
tree: 4fe44bc895d301a7971d27aa8d2d6a86a7f71920
  1. cmd/
  2. cue/
  3. doc/
  4. internal/
  5. pkg/
  6. AUTHORS
  7. CONTRIBUTING.md
  8. go.mod
  9. go.sum
  10. LICENSE
  11. README.md
README.md

The CUE Data Constraint Language

Configure, Unify, Execute

CUE is an open source data constraint language which aims to simplify tasks involving defining and using data. It can be used for data templating, data validation, and even defining scrips operating on data.

CUE is a constraint-based language. Constraints act both as data templates and detailed type definitions. Constraints provide a powerful yet simple alternative to inheritance, a common source of complexity with existing configuration languages. Constraints also provide an expressive way to define the possible values of data types, which in turn can be used for data validation in various applications.

The CUE tooling also provides integrated declarative scripting aimed at simplifying putting configurations to good use while giving static analysis tools maximum domain knowledge.

Some highlights:

  • JSON superset: get started quickly
  • convert existing YAML and JSON
  • declarative scripting
  • automatically simplify configurations
  • formatter
  • arbitrary-precision arithmetic
  • rich APIs designed for automated tooling
  • a formalism conducive to automated reasoning
  • generate CUE templates from source code
  • generate source code from CUE configurations (TODO)

Download and Install

Install From Source

If you already have Go installed, the short version is:

go get -u cuelang.org/go/cmd/cue

This will install the cue command line tool.

For more details see Installing CUE.

Learning CUE

The fastest way to learn the basics is to follow the tutorial on basic language constructs.

A more elaborate tutorial demonstrating of how to convert and restructure an existing set of Kubernetes configurations is available in written form.

References

Contributing

Our canonical Git repository is located at https://cue.googlesource.com.

To contribute, please read the Contribution Guide.

To report issues or make a feature request, use the issue tracker.

Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only.

Unless otherwise noted, the CUE source files are distributed under the Apache 2.0 license found in the LICENSE file.

This is not an officially supported Google product.