Function Compile

src/go/plugin/framework/chartengine/compiler.go:23–48

Compile converts a decoded/default-applied chart template spec into immutable chartengine IR. Callers should prefer charttpl.DecodeYAML, which applies chart_defaults inheritance before validation. Compile validates the provided spec but does not apply charttpl defaults or mutate the input.

(spec *charttpl.Spec, revision uint64)

// inheritance before validation. Compile validates the provided spec but does
// not apply charttpl defaults or mutate the input.
func Compile(spec *charttpl.Spec, revision uint64) (*program.Program, error) {
	if spec == nil {
		return nil, fmt.Errorf("chartengine: nil template spec")
	}
	if err := spec.Validate(); err != nil {
		return nil, fmt.Errorf("chartengine: invalid template spec: %w", err)
	}

	c := compiler{
		metricsSet: make(map[string]struct{}),
	}

	rootCtx := normalizeOptional(spec.ContextNamespace)
	for i := range spec.Groups {
		groupPath := []int{i}
		if err := c.compileGroup(spec.Groups[i], compileScope{
			metrics:      make(map[string]struct{}),
			familyParts:  nil,
			contextParts: rootCtx,
		}, groupPath); err != nil {
			return nil, err
		}
	}

	return program.New(spec.Version, revision, c.metricNames(), c.charts)
}

type compiler struct {
	charts     []program.Chart