Libninja panics while processing the commercetools OpenAPI spec

[mseele]

I want to generate a commercetools OpenAPI client and tried to process the OpenAPI spec from commercetools:

https://github.com/commercetools/commercetools-api-reference/blob/main/oas/api/openapi.yaml

Unfortunalty then generation failed with a panic:

libninja gen -l rust ct -o ct openapi.yaml
ct/Cargo.toml: Wrote file.
ct/src/model.rs: Wrote file.
ct/src/model/address.rs: Wrote file.
ct/src/model/address_draft.rs: Wrote file.
ct/src/model/api_client.rs: Wrote file.
ct/src/model/api_client_paged_query_response.rs: Wrote file.
ct/src/model/approval_flow.rs: Wrote file.
ct/src/model/approval_flow_approval.rs: Wrote file.
ct/src/model/approval_flow_paged_query_response.rs: Wrote file.
ct/src/model/approval_flow_rejection.rs: Wrote file.
ct/src/model/approval_flow_update_action.rs: Wrote file.
ct/src/model/approval_rule.rs: Wrote file.
ct/src/model/approval_rule_paged_query_response.rs: Wrote file.
ct/src/model/approval_rule_update_action.rs: Wrote file.
ct/src/model/approver_conjunction.rs: Wrote file.
ct/src/model/approver_conjunction_draft.rs: Wrote file.
ct/src/model/approver_disjunction.rs: Wrote file.
ct/src/model/approver_disjunction_draft.rs: Wrote file.
ct/src/model/approver_hierarchy.rs: Wrote file.
ct/src/model/approver_hierarchy_draft.rs: Wrote file.
ct/src/model/asset.rs: Wrote file.
ct/src/model/asset_dimensions.rs: Wrote file.
ct/src/model/asset_draft.rs: Wrote file.
ct/src/model/asset_source.rs: Wrote file.
ct/src/model/assigned_product_reference.rs: Wrote file.
ct/src/model/assigned_product_selection.rs: Wrote file.
ct/src/model/assigned_product_selection_paged_query_response.rs: Wrote file.
ct/src/model/associate.rs: Wrote file.
ct/src/model/associate_draft.rs: Wrote file.
ct/src/model/associate_role.rs: Wrote file.
ct/src/model/associate_role_assignment.rs: Wrote file.
ct/src/model/associate_role_assignment_draft.rs: Wrote file.
ct/src/model/associate_role_key_reference.rs: Wrote file.
ct/src/model/associate_role_paged_query_response.rs: Wrote file.
ct/src/model/associate_role_resource_identifier.rs: Wrote file.
ct/src/model/associate_role_update_action.rs: Wrote file.
ct/src/model/attribute.rs: Wrote file.
ct/src/model/attribute_definition.rs: Wrote file.
ct/src/model/attribute_definition_draft.rs: Wrote file.
ct/src/model/attribute_group.rs: Wrote file.
ct/src/model/attribute_group_paged_query_response.rs: Wrote file.
ct/src/model/attribute_group_update_action.rs: Wrote file.
ct/src/model/attribute_reference.rs: Wrote file.
ct/src/model/attribute_type.rs: Wrote file.
ct/src/model/base_address.rs: Wrote file.
ct/src/model/base_resource.rs: Wrote file.
ct/src/model/business_unit.rs: Wrote file.
ct/src/model/business_unit_configuration.rs: Wrote file.
ct/src/model/business_unit_key_reference.rs: Wrote file.
ct/src/model/business_unit_paged_query_response.rs: Wrote file.
ct/src/model/business_unit_resource_identifier.rs: Wrote file.
ct/src/model/business_unit_update_action.rs: Wrote file.
ct/src/model/cart.rs: Wrote file.
ct/src/model/cart_discount.rs: Wrote file.
ct/src/model/cart_discount_paged_query_response.rs: Wrote file.
ct/src/model/cart_discount_reference.rs: Wrote file.
ct/src/model/cart_discount_resource_identifier.rs: Wrote file.
ct/src/model/cart_discount_target.rs: Wrote file.
ct/src/model/cart_discount_update_action.rs: Wrote file.
ct/src/model/cart_discount_value.rs: Wrote file.
ct/src/model/cart_discount_value_draft.rs: Wrote file.
ct/src/model/cart_paged_query_response.rs: Wrote file.
ct/src/model/cart_reference.rs: Wrote file.
ct/src/model/cart_resource_identifier.rs: Wrote file.
ct/src/model/cart_update_action.rs: Wrote file.
ct/src/model/carts_configuration.rs: Wrote file.
ct/src/model/category.rs: Wrote file.
ct/src/model/category_order_hints.rs: Wrote file.
ct/src/model/category_paged_query_response.rs: Wrote file.
ct/src/model/category_reference.rs: Wrote file.
ct/src/model/category_resource_identifier.rs: Wrote file.
ct/src/model/category_update_action.rs: Wrote file.
ct/src/model/cent_precision_money.rs: Wrote file.
ct/src/model/change_subscription.rs: Wrote file.
ct/src/model/channel.rs: Wrote file.
ct/src/model/channel_paged_query_response.rs: Wrote file.
ct/src/model/channel_reference.rs: Wrote file.
ct/src/model/channel_resource_identifier.rs: Wrote file.
ct/src/model/channel_update_action.rs: Wrote file.
ct/src/model/client_logging.rs: Wrote file.
ct/src/model/container_and_key.rs: Wrote file.
ct/src/model/created_by.rs: Wrote file.
ct/src/model/custom_fields.rs: Wrote file.
ct/src/model/custom_fields_draft.rs: Wrote file.
ct/src/model/custom_line_item.rs: Wrote file.
ct/src/model/custom_line_item_draft.rs: Wrote file.
ct/src/model/custom_line_item_import_draft.rs: Wrote file.
ct/src/model/custom_object.rs: Wrote file.
ct/src/model/custom_object_paged_query_response.rs: Wrote file.
ct/src/model/custom_shipping_draft.rs: Wrote file.
ct/src/model/customer.rs: Wrote file.
ct/src/model/customer_group.rs: Wrote file.
ct/src/model/customer_group_paged_query_response.rs: Wrote file.
ct/src/model/customer_group_reference.rs: Wrote file.
ct/src/model/customer_group_resource_identifier.rs: Wrote file.
ct/src/model/customer_group_update_action.rs: Wrote file.
ct/src/model/customer_paged_query_response.rs: Wrote file.
ct/src/model/customer_reference.rs: Wrote file.
ct/src/model/customer_resource_identifier.rs: Wrote file.
ct/src/model/customer_sign_in_result.rs: Wrote file.
ct/src/model/customer_token.rs: Wrote file.
ct/src/model/customer_update_action.rs: Wrote file.
ct/src/model/delivery.rs: Wrote file.
ct/src/model/delivery_draft.rs: Wrote file.
ct/src/model/delivery_format.rs: Wrote file.
ct/src/model/delivery_item.rs: Wrote file.
ct/src/model/destination.rs: Wrote file.
ct/src/model/direct_discount.rs: Wrote file.
ct/src/model/discount_code.rs: Wrote file.
ct/src/model/discount_code_info.rs: Wrote file.
ct/src/model/discount_code_paged_query_response.rs: Wrote file.
ct/src/model/discount_code_reference.rs: Wrote file.
ct/src/model/discount_code_update_action.rs: Wrote file.
ct/src/model/discount_on_total_price.rs: Wrote file.
ct/src/model/discounted_line_item_portion.rs: Wrote file.
ct/src/model/discounted_line_item_price.rs: Wrote file.
ct/src/model/discounted_line_item_price_draft.rs: Wrote file.
ct/src/model/discounted_line_item_price_for_quantity.rs: Wrote file.
ct/src/model/discounted_price.rs: Wrote file.
ct/src/model/discounted_price_draft.rs: Wrote file.
ct/src/model/discounted_total_price_portion.rs: Wrote file.
ct/src/model/error_object.rs: Wrote file.
ct/src/model/extension.rs: Wrote file.
ct/src/model/extension_destination.rs: Wrote file.
ct/src/model/extension_paged_query_response.rs: Wrote file.
ct/src/model/extension_trigger.rs: Wrote file.
ct/src/model/extension_update_action.rs: Wrote file.
ct/src/model/external_line_item_total_price.rs: Wrote file.
ct/src/model/external_o_auth.rs: Wrote file.
ct/src/model/external_tax_rate_draft.rs: Wrote file.
ct/src/model/facet_results.rs: Wrote file.
ct/src/model/field_container.rs: Wrote file.
ct/src/model/field_definition.rs: Wrote file.
ct/src/model/field_type.rs: Wrote file.
ct/src/model/geo_json.rs: Wrote file.
ct/src/model/graph_ql_error.rs: Wrote file.
ct/src/model/graph_ql_error_location.rs: Wrote file.
ct/src/model/graph_ql_error_object.rs: Wrote file.
ct/src/model/graph_ql_response.rs: Wrote file.
ct/src/model/hit.rs: Wrote file.
ct/src/model/image.rs: Wrote file.
ct/src/model/image_dimensions.rs: Wrote file.
ct/src/model/inherited_associate.rs: Wrote file.
ct/src/model/inherited_associate_role_assignment.rs: Wrote file.
ct/src/model/inventory_entry.rs: Wrote file.
ct/src/model/inventory_entry_update_action.rs: Wrote file.
ct/src/model/inventory_paged_query_response.rs: Wrote file.
ct/src/model/item_shipping_details.rs: Wrote file.
ct/src/model/item_shipping_details_draft.rs: Wrote file.
ct/src/model/item_shipping_target.rs: Wrote file.
ct/src/model/item_state.rs: Wrote file.
ct/src/model/key_reference.rs: Wrote file.
ct/src/model/last_modified_by.rs: Wrote file.
ct/src/model/line_item.rs: Wrote file.
ct/src/model/line_item_draft.rs: Wrote file.
ct/src/model/line_item_import_draft.rs: Wrote file.
ct/src/model/localized_string.rs: Wrote file.
ct/src/model/location.rs: Wrote file.
ct/src/model/message.rs: Wrote file.
ct/src/model/message_paged_query_response.rs: Wrote file.
ct/src/model/message_payload.rs: Wrote file.
ct/src/model/message_subscription.rs: Wrote file.
ct/src/model/messages_configuration.rs: Wrote file.
ct/src/model/method_external_tax_rate_draft.rs: Wrote file.
ct/src/model/method_tax_rate.rs: Wrote file.
ct/src/model/method_taxed_price.rs: Wrote file.
ct/src/model/money.rs: Wrote file.
ct/src/model/my_cart_update_action.rs: Wrote file.
ct/src/model/my_customer_draft.rs: Wrote file.
ct/src/model/my_customer_update_action.rs: Wrote file.
ct/src/model/my_line_item_draft.rs: Wrote file.
ct/src/model/my_payment.rs: Wrote file.
ct/src/model/my_payment_paged_query_response.rs: Wrote file.
ct/src/model/my_payment_update_action.rs: Wrote file.
ct/src/model/my_quote_request_update_action.rs: Wrote file.
ct/src/model/my_quote_update_action.rs: Wrote file.
ct/src/model/my_shopping_list_update_action.rs: Wrote file.
ct/src/model/my_transaction_draft.rs: Wrote file.
ct/src/model/order.rs: Wrote file.
ct/src/model/order_edit.rs: Wrote file.
ct/src/model/order_edit_paged_query_response.rs: Wrote file.
ct/src/model/order_edit_result.rs: Wrote file.
ct/src/model/order_edit_update_action.rs: Wrote file.
ct/src/model/order_excerpt.rs: Wrote file.
ct/src/model/order_paged_query_response.rs: Wrote file.
ct/src/model/order_paged_search_response.rs: Wrote file.
ct/src/model/order_reference.rs: Wrote file.
ct/src/model/order_search_query.rs: Wrote file.
ct/src/model/order_search_query_expression.rs: Wrote file.
ct/src/model/order_search_query_expression_value.rs: Wrote file.
ct/src/model/order_search_sorting.rs: Wrote file.
ct/src/model/order_update_action.rs: Wrote file.
ct/src/model/parcel.rs: Wrote file.
ct/src/model/parcel_draft.rs: Wrote file.
ct/src/model/parcel_measurements.rs: Wrote file.
ct/src/model/payment.rs: Wrote file.
ct/src/model/payment_info.rs: Wrote file.
ct/src/model/payment_method_info.rs: Wrote file.
ct/src/model/payment_paged_query_response.rs: Wrote file.
ct/src/model/payment_reference.rs: Wrote file.
ct/src/model/payment_status.rs: Wrote file.
ct/src/model/payment_status_draft.rs: Wrote file.
ct/src/model/payment_update_action.rs: Wrote file.
ct/src/model/price.rs: Wrote file.
ct/src/model/price_draft.rs: Wrote file.
ct/src/model/price_tier.rs: Wrote file.
ct/src/model/price_tier_draft.rs: Wrote file.
ct/src/model/product.rs: Wrote file.
ct/src/model/product_catalog_data.rs: Wrote file.
ct/src/model/product_data.rs: Wrote file.
ct/src/model/product_discount.rs: Wrote file.
ct/src/model/product_discount_paged_query_response.rs: Wrote file.
ct/src/model/product_discount_reference.rs: Wrote file.
ct/src/model/product_discount_update_action.rs: Wrote file.
ct/src/model/product_discount_value.rs: Wrote file.
ct/src/model/product_discount_value_draft.rs: Wrote file.
ct/src/model/product_paged_query_response.rs: Wrote file.
ct/src/model/product_projection.rs: Wrote file.
ct/src/model/product_projection_paged_query_response.rs: Wrote file.
ct/src/model/product_projection_paged_search_response.rs: Wrote file.
ct/src/model/product_reference.rs: Wrote file.
ct/src/model/product_selection.rs: Wrote file.
ct/src/model/product_selection_assignment.rs: Wrote file.
ct/src/model/product_selection_paged_query_response.rs: Wrote file.
ct/src/model/product_selection_product_paged_query_response.rs: Wrote file.
ct/src/model/product_selection_reference.rs: Wrote file.
ct/src/model/product_selection_resource_identifier.rs: Wrote file.
ct/src/model/product_selection_setting.rs: Wrote file.
ct/src/model/product_selection_setting_draft.rs: Wrote file.
ct/src/model/product_selection_update_action.rs: Wrote file.
ct/src/model/product_type.rs: Wrote file.
ct/src/model/product_type_paged_query_response.rs: Wrote file.
ct/src/model/product_type_reference.rs: Wrote file.
ct/src/model/product_type_resource_identifier.rs: Wrote file.
ct/src/model/product_type_update_action.rs: Wrote file.
ct/src/model/product_update_action.rs: Wrote file.
ct/src/model/product_variant.rs: Wrote file.
ct/src/model/product_variant_availability.rs: Wrote file.
ct/src/model/product_variant_channel_availability_map.rs: Wrote file.
ct/src/model/product_variant_draft.rs: Wrote file.
ct/src/model/product_variant_exclusion.rs: Wrote file.
ct/src/model/product_variant_import_draft.rs: Wrote file.
ct/src/model/product_variant_selection.rs: Wrote file.
ct/src/model/products_in_store_paged_query_response.rs: Wrote file.
ct/src/model/project.rs: Wrote file.
ct/src/model/project_update_action.rs: Wrote file.
ct/src/model/query_price.rs: Wrote file.
ct/src/model/quote.rs: Wrote file.
ct/src/model/quote_paged_query_response.rs: Wrote file.
ct/src/model/quote_reference.rs: Wrote file.
ct/src/model/quote_request.rs: Wrote file.
ct/src/model/quote_request_paged_query_response.rs: Wrote file.
ct/src/model/quote_request_reference.rs: Wrote file.
ct/src/model/quote_request_resource_identifier.rs: Wrote file.
ct/src/model/quote_request_update_action.rs: Wrote file.
ct/src/model/quote_resource_identifier.rs: Wrote file.
ct/src/model/quote_update_action.rs: Wrote file.
ct/src/model/reference.rs: Wrote file.
ct/src/model/resource_identifier.rs: Wrote file.
ct/src/model/return_info.rs: Wrote file.
ct/src/model/return_item.rs: Wrote file.
ct/src/model/return_item_draft.rs: Wrote file.
ct/src/model/review.rs: Wrote file.
ct/src/model/review_paged_query_response.rs: Wrote file.
ct/src/model/review_rating_statistics.rs: Wrote file.
ct/src/model/review_update_action.rs: Wrote file.
ct/src/model/rule_approver.rs: Wrote file.
ct/src/model/rule_approver_draft.rs: Wrote file.
ct/src/model/rule_requester.rs: Wrote file.
ct/src/model/rule_requester_draft.rs: Wrote file.
ct/src/model/scoped_price.rs: Wrote file.
ct/src/model/search_indexing_configuration.rs: Wrote file.
ct/src/model/search_indexing_configuration_values.rs: Wrote file.
ct/src/model/search_keywords.rs: Wrote file.
ct/src/model/shipping.rs: Wrote file.
ct/src/model/shipping_draft.rs: Wrote file.
ct/src/model/shipping_info.rs: Wrote file.
ct/src/model/shipping_info_import_draft.rs: Wrote file.
ct/src/model/shipping_method.rs: Wrote file.
ct/src/model/shipping_method_paged_query_response.rs: Wrote file.
ct/src/model/shipping_method_reference.rs: Wrote file.
ct/src/model/shipping_method_resource_identifier.rs: Wrote file.
ct/src/model/shipping_method_update_action.rs: Wrote file.
ct/src/model/shipping_rate.rs: Wrote file.
ct/src/model/shipping_rate_draft.rs: Wrote file.
ct/src/model/shipping_rate_input.rs: Wrote file.
ct/src/model/shipping_rate_input_draft.rs: Wrote file.
ct/src/model/shipping_rate_input_type.rs: Wrote file.
ct/src/model/shipping_rate_price_tier.rs: Wrote file.
ct/src/model/shopping_list.rs: Wrote file.
ct/src/model/shopping_list_line_item.rs: Wrote file.
ct/src/model/shopping_list_line_item_draft.rs: Wrote file.
ct/src/model/shopping_list_paged_query_response.rs: Wrote file.
ct/src/model/shopping_list_update_action.rs: Wrote file.
ct/src/model/shopping_lists_configuration.rs: Wrote file.
ct/src/model/staged_order_update_action.rs: Wrote file.
ct/src/model/staged_price_draft.rs: Wrote file.
ct/src/model/staged_quote.rs: Wrote file.
ct/src/model/staged_quote_paged_query_response.rs: Wrote file.
ct/src/model/staged_quote_reference.rs: Wrote file.
ct/src/model/staged_quote_resource_identifier.rs: Wrote file.
ct/src/model/staged_quote_update_action.rs: Wrote file.
ct/src/model/staged_standalone_price.rs: Wrote file.
ct/src/model/standalone_price.rs: Wrote file.
ct/src/model/standalone_price_paged_query_response.rs: Wrote file.
ct/src/model/standalone_price_update_action.rs: Wrote file.
ct/src/model/state.rs: Wrote file.
ct/src/model/state_paged_query_response.rs: Wrote file.
ct/src/model/state_reference.rs: Wrote file.
ct/src/model/state_resource_identifier.rs: Wrote file.
ct/src/model/state_update_action.rs: Wrote file.
ct/src/model/store.rs: Wrote file.
ct/src/model/store_country.rs: Wrote file.
ct/src/model/store_key_reference.rs: Wrote file.
ct/src/model/store_paged_query_response.rs: Wrote file.
ct/src/model/store_resource_identifier.rs: Wrote file.
ct/src/model/store_update_action.rs: Wrote file.
ct/src/model/sub_rate.rs: Wrote file.
ct/src/model/subscription.rs: Wrote file.
ct/src/model/subscription_paged_query_response.rs: Wrote file.
ct/src/model/subscription_update_action.rs: Wrote file.
ct/src/model/suggestion_result.rs: Wrote file.
ct/src/model/sync_info.rs: Wrote file.
ct/src/model/tax_category.rs: Wrote file.
ct/src/model/tax_category_paged_query_response.rs: Wrote file.
ct/src/model/tax_category_reference.rs: Wrote file.
ct/src/model/tax_category_resource_identifier.rs: Wrote file.
ct/src/model/tax_category_update_action.rs: Wrote file.
ct/src/model/tax_portion.rs: Wrote file.
ct/src/model/tax_portion_draft.rs: Wrote file.
ct/src/model/tax_rate.rs: Wrote file.
ct/src/model/tax_rate_draft.rs: Wrote file.
ct/src/model/taxed_item_price.rs: Wrote file.
ct/src/model/taxed_price.rs: Wrote file.
ct/src/model/taxed_price_draft.rs: Wrote file.
ct/src/model/text_line_item.rs: Wrote file.
ct/src/model/text_line_item_draft.rs: Wrote file.
ct/src/model/tracking_data.rs: Wrote file.
ct/src/model/transaction.rs: Wrote file.
ct/src/model/transaction_draft.rs: Wrote file.
ct/src/model/type_.rs: Wrote file.
ct/src/model/type_paged_query_response.rs: Wrote file.
ct/src/model/type_reference.rs: Wrote file.
ct/src/model/type_resource_identifier.rs: Wrote file.
ct/src/model/type_update_action.rs: Wrote file.
ct/src/model/typed_money.rs: Wrote file.
ct/src/model/typed_money_draft.rs: Wrote file.
ct/src/model/user_provided_identifiers.rs: Wrote file.
ct/src/model/zone.rs: Wrote file.
ct/src/model/zone_paged_query_response.rs: Wrote file.
ct/src/model/zone_rate.rs: Wrote file.
ct/src/model/zone_rate_draft.rs: Wrote file.
ct/src/model/zone_reference.rs: Wrote file.
ct/src/model/zone_resource_identifier.rs: Wrote file.
ct/src/model/zone_update_action.rs: Wrote file.
ct/src/request/by_project_key_get.rs: Wrote file.
ct/src/request/by_project_key_post.rs: Wrote file.
ct/src/request/by_project_key_head.rs: Wrote file.
thread 'main' panicked at mir/src/lib.rs:304:23:
"^var[_][a_z_a_z0_9]$" is not a valid Ident
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[kurtbuilds]

That's a pretty sane error message. Basically, you have a query param in operation ByProjectKeyApiClientsGet with name: /^var[.][a-zA-Z0-9]+$/. libninja fails because it's too difficult to make a valid identifier from that name.

I'd recommend changing the openapi spec (I think Readme has notes on doing that as a pipeline instead of a one-off if you need it). However, let me know if you have other suggestions.