Language Guide

This section walks through every feature of the function-hcl DSL, one topic at a time. Each page builds on concepts introduced earlier, so if you’re new to function-hcl, reading them in order is recommended.

The guide covers:

1. Source Format – how HCL files are packaged as input
2. HCL Basics – identifiers, blocks, attributes, and other fundamentals
3. The req Variable – accessing the Crossplane request state
4. Local Variables – defining and scoping locals
5. Resource Blocks – declaring individual composed resources
6. Resource Collections – creating multiple resources with for_each
7. Groups – scoping locals to a set of resources
8. Conditions – conditionally creating resources
9. Composite Status – writing back to the XR status
10. Composite Connection Details – writing connection details
11. Resource Ready Status – controlling resource readiness
12. Context – sharing data with downstream pipeline steps
13. Requirements – requesting extra resources from Crossplane
14. User-Defined Functions – writing and invoking custom functions