Function New

src/go/plugin/framework/chartengine/internal/program/program.go:31–71

New constructs an immutable Program snapshot from precompiled IR items.

(version string, revision uint64, metrics []string, charts []Chart)

// New constructs an immutable Program snapshot from precompiled IR items.
func New(version string, revision uint64, metrics []string, charts []Chart) (*Program, error) {
	if version == "" {
		return nil, fmt.Errorf("program: version is required")
	}

	p := &Program{
		version:     version,
		revision:    revision,
		metrics:     make(map[string]struct{}, len(metrics)),
		charts:      make([]Chart, 0, len(charts)),
		chartByTmpl: make(map[string]int, len(charts)),
	}

	for _, name := range metrics {
		if name == "" {
			return nil, fmt.Errorf("program: metric name cannot be empty")
		}
		if _, ok := p.metrics[name]; ok {
			continue
		}
		p.metrics[name] = struct{}{}
		p.metricNames = append(p.metricNames, name)
	}
	slices.Sort(p.metricNames)

	for i, chart := range charts {
		if err := validateChart(chart); err != nil {
			return nil, fmt.Errorf("program: chart[%d]: %w", i, err)
		}
		if _, exists := p.chartByTmpl[chart.TemplateID]; exists {
			return nil, fmt.Errorf("program: duplicate chart template_id %q", chart.TemplateID)
		}

		clone := chart.clone()
		p.chartByTmpl[clone.TemplateID] = len(p.charts)
		p.chartOrderID = append(p.chartOrderID, clone.TemplateID)
		p.charts = append(p.charts, clone)
	}

	return p, nil
}

// Version returns the program schema/version marker.
func (p *Program) Version() string { return p.version }