Method compileChart

src/go/plugin/framework/chartengine/compiler.go:92–186

(chart charttpl.Chart, scope compileScope, templateID string)

}

func (c *compiler) compileChart(chart charttpl.Chart, scope compileScope, templateID string) (program.Chart, error) {
	dimensions := make([]program.Dimension, 0, len(chart.Dimensions))
	selectorKeySet := make(map[string]struct{})
	dynamicDimensionKeys := make(map[string]struct{})

	metricKinds := make(map[string]bool)
	for i := range chart.Dimensions {
		compiledDim, err := compileDimension(chart.Dimensions[i], scope.metrics)
		if err != nil {
			return program.Chart{}, fmt.Errorf("dimension[%d]: %w", i, err)
		}
		dimensions = append(dimensions, compiledDim.dimension)

		for _, key := range compiledDim.selectorKeys {
			selectorKeySet[key] = struct{}{}
		}
		for _, key := range compiledDim.dynamicLabelKeys {
			dynamicDimensionKeys[key] = struct{}{}
		}
		for _, kind := range compiledDim.metricKinds {
			metricKinds[kind] = true
		}
	}

	algorithm, err := resolveAlgorithm(chart.Algorithm, metricKinds)
	if err != nil {
		return program.Chart{}, err
	}

	chartType, err := resolveChartType(chart.Type)
	if err != nil {
		return program.Chart{}, err
	}

	contextParts := append(append([]string(nil), scope.contextParts...), strings.TrimSpace(chart.Context))
	context := strings.Join(filterEmpty(contextParts), ".")

	baseID := strings.TrimSpace(chart.ID)
	if baseID == "" {
		// Phase-1 default when id is omitted: derive from chart context.
		baseID = strings.ReplaceAll(context, ".", "_")
	}

	idTemplate, err := parseTemplate(baseID)
	if err != nil {
		return program.Chart{}, fmt.Errorf("id: %w", err)
	}

	instanceByLabels, err := compileInstanceByLabels(chart.Instances)
	if err != nil {
		return program.Chart{}, fmt.Errorf("instances.by_labels: %w", err)
	}

	labelMode := program.PromotionModeAutoIntersection
	promote := normalizeUnique(chart.LabelPromoted)
	if len(promote) > 0 {
		labelMode = program.PromotionModeExplicitIntersection
	}