UI test error annotations!

src/options.ts

@@ -0,0 +1,82 @@
+import { ErrorFormat } from "./error";
+import * as path from "node:path";
+import * as fs from "node:fs";
+
+export type Options = {
+  input: string;
+  filename: string;
+  packageName: string;
+  debug: Set<string>;
+  noOutput: boolean;
+  noStd: boolean;
+  treatErrAsBug: boolean;
+  errorFormat: ErrorFormat;
+};
+
+export function defaultOptions(): Options {
+  return {
+    filename: "",
+    input: "",
+    packageName: "main",
+    debug: new Set<string>(),
+    noOutput: false,
+    noStd: false,
+    treatErrAsBug: false,
+    errorFormat: "text-render",
+  };
+}
+
+export function parseArgs(hardcodedInput: string): Options {
+  const opts = defaultOptions();
+
+  if (process.argv.length > 2) {
+    opts.filename = process.argv[2];
+    if (path.extname(opts.filename) !== ".nil") {
+      console.error(process.argv);
+
+      console.error(
+        `error: filename must have \`.nil\` extension: \`${opts.filename}\``,
+      );
+      process.exit(1);
+    }
+
+    opts.input = fs.readFileSync(opts.filename, { encoding: "utf-8" });
+    if (opts.filename.endsWith(".mod.nil")) {
+      opts.packageName = path.basename(opts.filename, ".mod.nil");
+    } else {
+      opts.packageName = path.basename(opts.filename, ".nil");
+    }
+
+    const debugArg = process.argv.find((arg) => arg.startsWith("--debug="));
+    if (debugArg !== undefined) {
+      const debugs = debugArg.slice("--debug=".length);
+      opts.debug = new Set(debugs.split(","));
+    }
+
+    if (process.argv.some((arg) => arg === "--no-output")) {
+      opts.noOutput = true;
+    }
+    if (process.argv.some((arg) => arg === "--no-std")) {
+      opts.noStd = true;
+    }
+    if (process.argv.some((arg) => arg === "--treat-err-as-bug")) {
+      opts.treatErrAsBug = true;
+    }
+    if (process.argv.some((arg) => arg === "--error-format-json")) {
+      opts.errorFormat = "json";
+    }
+  } else {
+    opts.filename = "<hardcoded>";
+    opts.input = hardcodedInput;
+    opts.packageName = "test";
+    opts.debug = new Set([
+      "tokens",
+      "parsed",
+      "resolved",
+      "typecked",
+      "wasm-validate",
+    ]);
+  }
+
+  return opts;
+}