better dictionary build error handling

Author: neverRare

build/dev.ts

@@ -51,7 +51,14 @@ async function watchDictionary(): Promise<number> {
 }
 if (import.meta.main) {
   if (!await exists(DICTIONARY)) {
-    await Deno.create(DICTIONARY);
+    const Dictionary = await import("../dictionary/build.ts");
+    if (!await Dictionary.build()) {
+      await Dictionary.buildWithDictionary(new Map());
+      // deno-lint-ignore no-console
+      console.error(
+        "Dictionary failed to build. Empty dictionary is used instead. Please fix it.",
+      );
+    }
   }
   const statusCodePromise = watchDictionary();
   await using _ = await watchMain();

dictionary/build.ts

@@ -10,6 +10,23 @@ import { Dictionary } from "./type.ts";
 const SOURCE = new URL("./dictionary", import.meta.url);
 const DESTINATION = new URL("./dictionary.ts", import.meta.url);
 
+export async function buildWithDictionary(
+  dictionary: Dictionary,
+): Promise<void> {
+  const json = JSON.stringify(
+    Object.fromEntries(dictionary),
+    undefined,
+    2,
+  );
+  const code = `\
+// This code is autogenerated
+
+import { Dictionary } from "./type.ts";
+
+export const dictionary: Dictionary = new Map(Object.entries(${json}));
+`;
+  await Deno.writeTextFile(DESTINATION, code);
+}
 export async function build(): Promise<boolean> {
   console.log("Building dictionary...");
   const start = performance.now();
@@ -24,19 +41,7 @@ export async function build(): Promise<boolean> {
     displayError(text, result.errors);
     return false;
   }
-  const json = JSON.stringify(
-    Object.fromEntries(dictionary),
-    undefined,
-    2,
-  );
-  const code = `\
-// This code is autogenerated
-
-import { Dictionary } from "./type.ts";
-
-export const dictionary: Dictionary = new Map(Object.entries(${json}));
-`;
-  await Deno.writeTextFile(DESTINATION, code);
+  await buildWithDictionary(dictionary);
   const end = performance.now();
   const total = Math.floor(end - start);
   const parsing = Math.floor(endDictionary - startDictionary);