Action finishes (cannot test yet)

.eslintrc.json

@@ -5,7 +5,16 @@
   ],
   "parser": "@typescript-eslint/parser",
   "plugins": [
-    "@typescript-eslint"
+    "@typescript-eslint",
+    "simple-import-sort",
+    "import"
   ],
-  "root": true
+  "root": true,
+  "rules": {
+    "import/first": "error",
+    "import/newline-after-import": "error",
+    "import/no-duplicates": "error",
+    "simple-import-sort/imports": "error",
+    "simple-import-sort/exports": "error"
+  }
 }

.prettierrc.json

@@ -1,16 +1 @@
-{
-  "printWidth": 80,
-  "tabWidth": 2,
-  "useTabs": false,
-  "semi": false,
-  "singleQuote": true,
-  "quoteProps": "as-needed",
-  "jsxSingleQuote": false,
-  "trailingComma": "none",
-  "bracketSpacing": true,
-  "bracketSameLine": true,
-  "arrowParens": "avoid",
-  "proseWrap": "always",
-  "htmlWhitespaceSensitivity": "css",
-  "endOfLine": "lf"
-}
+{}

src/errors.ts

@@ -0,0 +1,33 @@
+import { CustomError } from "ts-custom-error";
+
+export class InvalidUrlError extends CustomError {
+  public constructor(
+    public invalidUrl: string,
+    cause: unknown,
+  ) {
+    super(`Invalid URL given: ${invalidUrl}`, { cause });
+    // Set name explicitly as minification can mangle class names
+    Object.defineProperty(this, "name", { value: "InvalidUrlError" });
+  }
+}
+
+export class ParseUrlsError extends CustomError {
+  public constructor(
+    public wrongUrlString: string,
+    cause: unknown,
+  ) {
+    super(`Failed to parse the given URL strings: ${wrongUrlString}`, {
+      cause,
+    });
+    // Set name explicitly as minification can mangle class names
+    Object.defineProperty(this, "name", { value: "CannotParseUrlsError" });
+  }
+}
+
+export class UnknownError extends CustomError {
+  public constructor(cause: unknown) {
+    super(`Unknown error`, { cause });
+    // Set name explicitly as minification can mangle class names
+    Object.defineProperty(this, "name", { value: "UnknownError" });
+  }
+}

src/index.ts

@@ -1,6 +1,7 @@
 /**
  * The entrypoint for the action.
  */
-import { run } from './main'
 
-void run()
+import { run } from "./main.js";
+
+await run();

src/logger.ts

@@ -0,0 +1,34 @@
+import { createLogger, format, transports } from "winston";
+
+export const logger = createLogger({
+  level: "info",
+  format: format.combine(
+    format.timestamp({
+      format: "YYYY-MM-DD HH:mm:ss",
+    }),
+    format.errors({ stack: true }),
+    format.splat(),
+    format.json(),
+  ),
+  defaultMeta: { service: "diffnews" },
+  transports: [
+    //
+    // - Write to all logs with level `info` and below to `quick-start-combined.log`.
+    // - Write all logs error (and below) to `quick-start-error.log`.
+    //
+    new transports.File({ filename: "diffnews-error.log", level: "error" }),
+    new transports.File({ filename: "diffnews-combined.log" }),
+  ],
+});
+
+//
+// If we're not in production then **ALSO** log to the `console`
+// with the colorized simple format.
+//
+if (process.env.NODE_ENV !== "production") {
+  logger.add(
+    new transports.Console({
+      format: format.combine(format.colorize(), format.simple()),
+    }),
+  );
+}