Update LogLevel export to be verbatim syntax only

Author: benjie

RELEASE_NOTES.md

@@ -28,6 +28,8 @@ Read more:
   reach the end of the scope. (Primarily useful for tests.)
 - Maintenance work: upgrade to latest TypeScript, Jest, eliminate ts-node, fix
   yargs, use erasable syntax only for type-stripping support,
+- `LogLevel` export is now type only - a string union rather than a TypeScript
+  const enum.
 
 ## v0.17.2
 

src/index.ts

@@ -23,8 +23,8 @@ import type {
 import type { CompiledSharedOptions } from "./lib.ts";
 export { parseCronItem, parseCronItems, parseCrontab } from "./crontab.ts";
 export * from "./interfaces.ts";
-export type { LogFunctionFactory } from "./logger.ts";
-export { consoleLogFactory, Logger, LogLevel } from "./logger.ts";
+export type { LogFunctionFactory, LogLevel } from "./logger.ts";
+export { consoleLogFactory, Logger } from "./logger.ts";
 export { runTaskList, runTaskListOnce } from "./main.ts";
 export { WorkerPreset } from "./preset.ts";
 export { run, runMigrations, runOnce } from "./runner.ts";

src/logger.ts

@@ -3,10 +3,12 @@ if (process.env.GRAPHILE_WORKER_DEBUG) {
   process.env.GRAPHILE_LOGGER_DEBUG = process.env.GRAPHILE_WORKER_DEBUG;
 }
 
-import type { LogFunctionFactory as GraphileLogFunctionFactory } from "@graphile/logger";
+import type {
+  LogFunctionFactory as GraphileLogFunctionFactory,
+  LogLevel,
+} from "@graphile/logger";
 import {
   Logger as GraphileLogger,
-  LogLevel,
   makeConsoleLogFactory,
 } from "@graphile/logger";
 
@@ -17,7 +19,7 @@ export interface LogScope {
   jobId?: string;
 }
 
-export { LogLevel };
+export type { LogLevel };
 
 // For backwards compatibility
 export class Logger extends GraphileLogger<LogScope> {}