Assemble imported sequence-item scopes

internal/engine/directives.go

@@ -10,11 +10,14 @@ import (
 const directiveKey = "configkit"
 
 type importDeclaration struct {
-	path        string
-	glob        string
-	destination Path
-	optional    bool
-	location    Location
+	path              string
+	glob              string
+	destination       Path
+	placement         placementMode
+	placementPath     Path
+	placementLocation *Location
+	optional          bool
+	location          Location
 }
 
 func splitImportDirectives(root *document.Node) (*document.Node, []importDeclaration, []Diagnostic) {
@@ -70,7 +73,7 @@ func parseImportDeclaration(node *document.Node, declarationPath Path) (importDe
 	if node.Kind != document.Mapping {
 		return importDeclaration{}, []Diagnostic{nodeImportDiagnostic(CodeImportInvalid, declarationPath, "import declaration must be a mapping", node)}
 	}
-	declaration := importDeclaration{location: publicLocation(node.Location)}
+	declaration := importDeclaration{location: publicLocation(node.Location), placementPath: declarationPath.clone()}
 	seenTarget := false
 	for _, entry := range node.Mapping {
 		fieldPath := declarationPath.Key(entry.Key)
@@ -112,6 +115,21 @@ func parseImportDeclaration(node *document.Node, declarationPath Path) (importDe
 				return importDeclaration{}, []Diagnostic{nodeImportDiagnostic(CodeImportInvalid, fieldPath, "destination must contain only non-reserved mapping keys", entry.Value)}
 			}
 			declaration.destination = normalized
+		case "placement":
+			declaration.placementPath = fieldPath.clone()
+			placementLocation := publicLocation(entry.Value.Location)
+			declaration.placementLocation = &placementLocation
+			if entry.Value.Kind != document.String {
+				return importDeclaration{}, []Diagnostic{nodeImportDiagnostic(CodeImportInvalid, fieldPath, "placement must be mapping or sequence-item", entry.Value)}
+			}
+			switch entry.Value.Text {
+			case "mapping":
+				declaration.placement = placementModeMapping
+			case "sequence-item":
+				declaration.placement = placementModeSequenceItem
+			default:
+				return importDeclaration{}, []Diagnostic{nodeImportDiagnostic(CodeImportInvalid, fieldPath, "placement must be mapping or sequence-item", entry.Value)}
+			}
 		default:
 			return importDeclaration{}, []Diagnostic{nodeImportDiagnostic(CodeImportInvalid, fieldPath, "import declaration field is not recognized", entry.Value)}
 		}