chore: move syntax build to separate file

Author: jnoortheen

package.json

@@ -272,7 +272,7 @@
     "yaml": "^2.8.1"
   },
   "scripts": {
-    "prebuild": "mkdir -p dist && bun run src/grammar/nix.ts && bun run src/grammar/injection.ts",
+    "prebuild": "mkdir -p dist && bun run src/grammar/build.ts",
     "build": "bun build src/extension.ts --outdir=dist --external=vscode --target=node --format=cjs",
     "postinstall": "lefthook install",
     "clean": "rm -rd dist",

src/grammar/build.ts

@@ -0,0 +1,9 @@
+/// Generate json files from the grammar definitions.
+
+import * as helpers from "./helpers";
+import { nixInjectionGrammar } from "./injection";
+import { source_nix } from "./nix";
+
+// This code only runs when 'bun run index.ts' is executed directly.
+helpers.toJson("dist/injection.json", nixInjectionGrammar);
+helpers.toJson("dist/nix.tmLanguage.json", source_nix);

src/grammar/injection.ts

@@ -1,6 +1,4 @@
-import * as helpers from "./helpers";
-
-const nixInjectionGrammar = {
+export const nixInjectionGrammar = {
   fileTypes: [],
   injectionSelector: "L:text.html.markdown",
   patterns: [
@@ -45,8 +43,3 @@ const nixInjectionGrammar = {
   },
   scopeName: "markdown.nix.codeblock",
 };
-
-if (import.meta.main) {
-  // This code only runs when 'bun run index.ts' is executed directly.
-  helpers.toJson("dist/injection.json", nixInjectionGrammar);
-}

src/grammar/nix.ts

@@ -1238,8 +1238,3 @@ export const source_nix = {
     },
   },
 };
-
-if (import.meta.main) {
-  // This code only runs when 'bun run index.ts' is executed directly.
-  helpers.toJson("dist/nix.tmLanguage.json", source_nix);
-}