Writing rules

Rules implement:

type Rule interface {
  ID() string
  META() RuleMeta
  Apply(file string, f *hcl.File) []Issue
  Finish() []Issue
}

Parse with hclsyntax.ParseConfig, iterate body.Blocks, or use the optional AST walker for nested/expr-heavy checks. Return issues with precise hcl.Range. Keep rules single-purpose and fast.

Depending on what the rule needs to assert, you may report issues for each file independently (in Apply) or collect information and report after all files have been checked (in Finish).

The ID follows this pattern: package.name