Timothy J. Aveni
300 lines
12 KiB
JavaScript
Executable File
300 lines
12 KiB
JavaScript
Executable File
#!/usr/bin/env node
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import fs from "node:fs";
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import path from "node:path";
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import { compileCaminoSchema } from "./schema-compiler.js";
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const usage = () => {
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console.error("Usage: camino-codegen-ts-runtime <class-schema.camino.proto> <out-dir> [implementation-import]");
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process.exit(1);
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};
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const required = (value) => value ?? usage();
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const stringLiteral = (value) => JSON.stringify(value);
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const upperFirst = (value) => value.length === 0 ? value : `${value[0]?.toUpperCase()}${value.slice(1)}`;
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const lowerFirst = (value) => value.length === 0 ? value : `${value[0]?.toLowerCase()}${value.slice(1)}`;
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const camel = (value) => value
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.split(/[^a-zA-Z0-9]+/)
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.filter(Boolean)
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.map((part, index) => index === 0 ? lowerFirst(part) : upperFirst(lowerFirst(part)))
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.join("");
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const isIdentifier = (value) => /^[A-Za-z_$][A-Za-z0-9_$]*$/.test(value);
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const classId = (schema) => `${schema.id.namespace}:${schema.id.name}:${schema.id.version}:${schema.id.hash ?? ""}`;
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const symbolId = (value) => `${value.namespace}:${value.name}:${value.version}:${value.hash ?? ""}`;
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const tsTypeForTypeRef = (type) => {
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if (type.enumValues && type.enumValues.length > 0) {
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return type.enumValues.map(stringLiteral).join(" | ");
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}
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switch (type.protoType.replace(/^\./, "")) {
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case "string":
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case "google.protobuf.StringValue":
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return "string";
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case "bool":
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case "google.protobuf.BoolValue":
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return "boolean";
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case "double":
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case "float":
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case "google.protobuf.DoubleValue":
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case "google.protobuf.FloatValue":
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case "int32":
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case "sint32":
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case "sfixed32":
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case "uint32":
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case "fixed32":
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case "int64":
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case "sint64":
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case "sfixed64":
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case "uint64":
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case "fixed64":
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case "google.protobuf.Int32Value":
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case "google.protobuf.UInt32Value":
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case "google.protobuf.Int64Value":
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case "google.protobuf.UInt64Value":
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return "number";
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case "bytes":
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case "google.protobuf.BytesValue":
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return "Uint8Array";
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default:
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return "unknown";
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}
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};
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const tsTypeForField = (field) => tsTypeForTypeRef(field.type);
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const tsValueTypeForField = (field) => field.repeated ? `${tsTypeForField(field)}[]` : tsTypeForField(field);
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const tsFieldApiType = (field) => field.conflict === "crdt"
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? `CrdtField<${tsValueTypeForField(field)}>`
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: `Field<${tsValueTypeForField(field)}>`;
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const functionExportName = (fn, fallback) => {
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if (isIdentifier(fn.symbol)) {
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return fn.symbol;
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}
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const fallbackName = camel(fallback);
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if (isIdentifier(fallbackName)) {
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return fallbackName;
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}
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throw new Error(`Cannot generate TS export name for function ${fn.symbol}`);
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};
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const generatedWarning = `// @generated by camino-codegen-ts-runtime. Do not edit.\n`;
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const fieldTypeId = (field) => field.type.symbol ? symbolId(field.type.symbol) : field.type.protoType;
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const crdtStorageTypeId = (field) => field.type.protoType ||
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(field.type.symbol
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? `${field.type.symbol.namespace}.${field.type.symbol.name}`
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: fieldTypeId(field));
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const fieldStorageId = (field) => field.ops && field.storage.kind === "stored" ? "derived" : field.storage.kind;
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const interfaceTypeName = (implementation) => `${implementation.interface.name}Ref`;
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const renderInterfaceRefTypes = (schema) => schema.implements
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.map((implementation) => {
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const typeParams = implementation.typeBindings.map((binding) => binding.name);
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const generic = typeParams.length > 0 ? `<${typeParams.join(", ")}>` : "";
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const bindings = typeParams.length > 0
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? typeParams
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.map((param) => ` readonly ${param}: ${param};`)
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.join("\n")
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: " readonly value: unknown;";
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return `export type ${interfaceTypeName(implementation)}${generic} = ObjectRef<string> & {
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readonly $caminoInterfaces: {
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readonly ${stringLiteral(symbolId(implementation.interface))}: {
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${bindings}
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};
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};
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};`;
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})
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.join("\n\n");
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const interfaceMixins = (schema) => schema.implements.map((implementation) => {
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const typeArgs = implementation.typeBindings.map((binding) => tsTypeForTypeRef(binding.type));
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return `${interfaceTypeName(implementation)}${typeArgs.length > 0 ? `<${typeArgs.join(", ")}>` : ""}`;
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});
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const operationFunctionSpecs = (schema) => schema.fields.flatMap((field) => {
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const serviceName = field.ops?.service.replace(/^\./, "");
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if (!serviceName) {
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return [];
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}
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const service = schema.operationServices.find((candidate) => candidate.fullName === serviceName);
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if (!service) {
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throw new Error(`${schema.id.name}.${field.name} points to missing operation service ${field.ops?.service}`);
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}
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return service.operations.map((operation) => ({
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exportName: functionExportName(operation.function, `${field.name}_${operation.name}`),
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symbol: operation.function.symbol,
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...(operation.function.operation
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? { operation: operation.function.operation }
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: {}),
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packageNamespace: operation.function.packageNamespace,
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packageName: operation.function.packageName,
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field: {
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name: field.name,
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type: fieldTypeId(field),
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storage: fieldStorageId(field),
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conflict: field.conflict,
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},
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}));
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});
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const renderRuntime = (schema) => {
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const className = schema.id.name;
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const objectTypeName = `${className}Object`;
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const refTypeName = `${className}Ref`;
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const contextTypeName = `${className}Context`;
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const implementationTypeName = `${className}Implementation`;
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const serveName = `serve${className}Runtime`;
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const createObjectName = `create${className}Object`;
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const interfaceRefTypes = renderInterfaceRefTypes(schema);
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const refType = [`ObjectRef<${stringLiteral(classId(schema))}>`, ...interfaceMixins(schema)]
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.join(" & ");
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const edgeFields = new Set(schema.edges.map((edge) => edge.sourceField));
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const writableFields = schema.fields.filter((field) => field.storage.kind === "stored" &&
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!field.ops &&
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!edgeFields.has(field.name));
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const functionSpecs = [
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...(schema.constructorSpec
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? [
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{
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exportName: functionExportName(schema.constructorSpec.function, "constructor"),
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symbol: schema.constructorSpec.function.symbol,
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...(schema.constructorSpec.function.operation
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? { operation: schema.constructorSpec.function.operation }
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: {}),
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packageNamespace: schema.constructorSpec.function.packageNamespace,
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packageName: schema.constructorSpec.function.packageName,
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},
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]
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: []),
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...schema.methods.map((method) => ({
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exportName: functionExportName(method.function, method.name),
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symbol: method.function.symbol,
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...(method.function.operation ? { operation: method.function.operation } : {}),
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packageNamespace: method.function.packageNamespace,
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packageName: method.function.packageName,
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})),
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...schema.fields.flatMap((field) => field.storage.resolver
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? [
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{
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exportName: functionExportName(field.storage.resolver, field.name),
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symbol: field.storage.resolver.symbol,
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...(field.storage.resolver.operation
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? { operation: field.storage.resolver.operation }
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: {}),
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packageNamespace: field.storage.resolver.packageNamespace,
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packageName: field.storage.resolver.packageName,
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},
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]
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: []),
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...operationFunctionSpecs(schema),
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];
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const firstFunction = functionSpecs[0];
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if (!firstFunction) {
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throw new Error(`${schema.id.name} has no runtime functions to generate`);
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}
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const mixedPackage = functionSpecs.find((spec) => spec.packageNamespace !== firstFunction.packageNamespace ||
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spec.packageName !== firstFunction.packageName);
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if (mixedPackage) {
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throw new Error(`${schema.id.name} points to multiple packages; v0 TS runtime generation expects one package`);
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}
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return `${generatedWarning}import {
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type CaminoClient,
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createCrdtField,
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createField,
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type CrdtField,
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type Field,
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type FieldOperation,
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type InvokeRequest,
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objectRef,
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type ObjectRef,
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type RuntimeHandler,
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serveQuixosPackageRuntime,
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} from "@quixos/camino-package-runtime";
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${interfaceRefTypes ? `${interfaceRefTypes}\n\n` : ""}export type ${refTypeName} = ${refType};
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export type ${objectTypeName} = {
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id: ${refTypeName};
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${writableFields
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.map((field) => ` ${camel(field.name)}: ${tsFieldApiType(field)};`)
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.join("\n")}
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};
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export type ${contextTypeName} = {
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object: ${objectTypeName};
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camino: CaminoClient;
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request: InvokeRequest;
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};
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export type ${implementationTypeName} = {
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${functionSpecs
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.map((spec) => spec.operation
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? ` ${spec.exportName}: FieldOperation<${contextTypeName}>;`
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: ` ${spec.exportName}: RuntimeHandler<${contextTypeName}>;`)
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.filter((line, index, lines) => lines.indexOf(line) === index)
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.join("\n")}
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};
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const packageNamespace = ${stringLiteral(firstFunction.packageNamespace)};
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const packageName = ${stringLiteral(firstFunction.packageName)};
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const runtimeProtocolVersion = ${stringLiteral("camino-orch-v0")};
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const functions = [
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${functionSpecs
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.map((spec) => ` { exportName: ${stringLiteral(spec.exportName)}, symbol: ${stringLiteral(spec.symbol)}${spec.operation ? `, operation: ${stringLiteral(spec.operation)}` : ""}${spec.field
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? `, field: { name: ${stringLiteral(spec.field.name)}, type: ${stringLiteral(spec.field.type)}, storage: ${stringLiteral(spec.field.storage)}, conflict: ${stringLiteral(spec.field.conflict)} }`
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: ""} },`)
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.join("\n")}
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] as const;
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export const ${createObjectName} = (
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camino: CaminoClient,
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objectId: string,
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): ${objectTypeName} => {
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const id = objectRef<${stringLiteral(classId(schema))}>(objectId) as ${refTypeName};
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return {
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id,
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${writableFields
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.map((fieldSchema) => fieldSchema.conflict === "crdt"
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? ` ${camel(fieldSchema.name)}: createCrdtField(camino, id, ${stringLiteral(fieldSchema.name)}, ${stringLiteral(crdtStorageTypeId(fieldSchema))}),`
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: ` ${camel(fieldSchema.name)}: createField(camino, id, ${stringLiteral(fieldSchema.name)}),`)
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.join("\n")}
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};
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};
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export const create${className}Context = (
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camino: CaminoClient,
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request: InvokeRequest,
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): ${contextTypeName} => ({
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object: ${createObjectName}(camino, request.objectId),
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camino,
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request,
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});
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export const ${serveName} = (implementation: ${implementationTypeName}) => {
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serveQuixosPackageRuntime({
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packageNamespace,
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packageName,
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runtimeProtocolVersion,
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functions,
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implementation,
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createContext: create${className}Context,
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});
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};
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`;
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};
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const renderServer = (schema, implementationImport) => {
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const className = schema.id.name;
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return `${generatedWarning}import * as implementation from ${stringLiteral(implementationImport)};
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import { serve${className}Runtime } from "./${schema.id.namespace}.${className}.runtime.js";
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serve${className}Runtime(implementation);
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`;
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};
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const main = async () => {
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const sourceFile = required(process.argv[2]);
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const outDir = required(process.argv[3]);
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const implementationImport = process.argv[4] ?? "../task.impl.js";
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const compiled = await compileCaminoSchema(sourceFile);
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if (compiled.classes.length !== 1) {
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throw new Error(`Expected exactly one Camino class in ${sourceFile}, found ${compiled.classes.length}`);
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}
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const schema = compiled.classes[0];
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if (!schema) {
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throw new Error(`No Camino class found in ${sourceFile}`);
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}
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fs.mkdirSync(outDir, { recursive: true });
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const baseName = `${schema.id.namespace}.${schema.id.name}`;
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fs.writeFileSync(path.join(outDir, `${baseName}.runtime.ts`), renderRuntime(schema));
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fs.writeFileSync(path.join(outDir, `${baseName}.server.ts`), renderServer(schema, implementationImport));
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};
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await main();
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