Validate source versions in recursive imports

internal/engine/source_version.go

@@ -23,6 +23,7 @@ type sourceVersionAncestor struct {
 }
 
 type sourceVersionEvidence struct {
+	sourceID     string
 	path         Path
 	resolvedPath Path
 	destination  Path
@@ -34,6 +35,35 @@ type sourceVersionEvidence struct {
 	redacted     bool
 }
 
+type sourceVersionState struct {
+	localRule      *VersionRule
+	effectiveRule  *VersionRule
+	mode           sourceVersionMode
+	mainProcessing *sourceVersionProcessingResult
+	evidence       []*sourceVersionEvidence
+	diagnostics    []Diagnostic
+}
+
+func (state *sourceVersionState) process(root *document.Node, role sourceVersionRole, destination Path, sourceID string) (sourceVersionProcessingResult, []Diagnostic) {
+	if state == nil || state.mode == sourceVersionModeDefault {
+		return sourceVersionProcessingResult{}, nil
+	}
+	result := processSourceVersion(root, state.localRule, role, destination, state.mode)
+	if result.evidence != nil {
+		result.evidence.sourceID = sourceID
+		state.evidence = append(state.evidence, result.evidence)
+	}
+	var failures []Diagnostic
+	for _, diagnostic := range result.diagnostics {
+		if diagnostic.Severity == SeverityWarning {
+			state.diagnostics = append(state.diagnostics, diagnostic)
+		} else if diagnostic.Severity == SeverityError {
+			failures = append(failures, diagnostic)
+		}
+	}
+	return result, failures
+}
+
 type sourceVersionProcessingResult struct {
 	payload     *document.Node
 	imports     []importDeclaration