refactor: split up src/grammar/index.ts

Author: ryanrasti

package.json

@@ -15,7 +15,7 @@
     "format:check": "prettier --check \"**/*.{ts,js,json}\"",
     "codegen": "npm run codegen:types && npm run codegen:parsers",
     "codegen:types": "bash ./src/gen/gen.sh && kysely --no-outdated-check migrate:up -e test && bash ./src/gen/table-gen.sh",
-    "codegen:parsers": "tsx src/grammar/index.ts",
+    "codegen:parsers": "tsx src/grammar/gen.ts",
     "clean": "(rm ./src/gen/functions.ts; rm -r ./src/gen/types; rm ./src/gen/tables.json; rm ./src/gen/tables.ts) || true",
     "prepublishOnly": "npm version $(npm pkg get version | tr -d '\"')-$(git rev-parse --short HEAD) --no-git-tag-version"
   },

src/grammar/gen.ts

@@ -0,0 +1,47 @@
+import { grammars } from ".";
+
+// Main function to generate parser files
+function main() {
+  const fs = require("fs");
+  const path = require("path");
+  const { execSync } = require("child_process");
+
+  const outputDir = path.join(__dirname, "generated");
+
+  // Create output directory if it doesn't exist
+  if (!fs.existsSync(outputDir)) {
+    fs.mkdirSync(outputDir, { recursive: true });
+  }
+
+  // Generate a file for each top-level clause
+  for (const [name, clause] of Object.entries(grammars)) {
+    const content = `// Generated parser for ${name.toUpperCase()} statement
+import { grammars, ParsedClause } from '../index';
+import * as Types from '../../types';
+import invariant from 'tiny-invariant';
+
+// Type imports for the parser function
+type FromItem = any; // TODO: Import proper FromItem type
+${clause === grammars.update ? `type MergeSelectArgs<_U, _F> = any; // TODO: Import proper MergeSelectArgs type` : ""}
+
+${clause.generateParser()}
+`;
+
+    const filePath = path.join(outputDir, `${name}.ts`);
+    fs.writeFileSync(filePath, content);
+    console.log(`Generated ${name}.ts`);
+  }
+
+  // Format generated files with prettier
+  console.log("Formatting generated files...");
+  try {
+    execSync(`npm run format -- ${outputDir}/*.ts`, { stdio: "inherit" });
+  } catch (error) {
+    console.error("Error formatting files:", error);
+  }
+}
+
+// Run if this file is executed directly
+if (require.main === module) {
+  main();
+}