fix(update): update script actually supports comments in jsonc

src/dev/deps.ts

@@ -18,6 +18,7 @@ export { parse } from "https://deno.land/std@0.193.0/flags/mod.ts";
 export { gte } from "https://deno.land/std@0.193.0/semver/mod.ts";
 export { existsSync } from "https://deno.land/std@0.193.0/fs/mod.ts";
 export * as semver from "https://deno.land/std@0.195.0/semver/mod.ts";
+export * as JSONC from "https://deno.land/std@0.195.0/jsonc/mod.ts";
 
 // ts-morph
 export { Node, Project } from "https://deno.land/x/ts_morph@17.0.1/mod.ts";

tests/cli_test.ts

@@ -356,14 +356,24 @@ Deno.test("fresh-update", async function fn(t) {
     );
   });
 
+  const comment = "// This is a test comment";
+  const regex = /("preact": "https:\/\/esm.sh\/preact@[\d.]+",\n)/;
+  const originalName = `${tmpDirName}/deno.json`;
+  const updatedName = `${originalName}c`;
   await t.step("execute update command deno.jsonc support", async () => {
     try {
-      Deno.renameSync(`${tmpDirName}/deno.json`, `${tmpDirName}/deno.jsonc`);
+      Deno.renameSync(originalName, updatedName);
+      let denoJsonText = await Deno.readTextFile(updatedName);
+      denoJsonText = denoJsonText.replace(regex, `$1${comment}\n`);
+      await Deno.writeTextFile(updatedName, denoJsonText);
       await updateAndVerify(
         /The manifest has been generated for \d+ routes and \d+ islands./,
       );
     } finally {
-      Deno.renameSync(`${tmpDirName}/deno.jsonc`, `${tmpDirName}/deno.json`);
+      let denoJsonText = await Deno.readTextFile(updatedName);
+      denoJsonText = denoJsonText.replace(new RegExp(`\n${comment}\n`), "\n");
+      await Deno.writeTextFile(updatedName, denoJsonText);
+      Deno.renameSync(updatedName, originalName);
     }
   });
 

update.ts

@@ -1,7 +1,9 @@
 import {
   dirname,
   existsSync,
+  extname,
   join,
+  JSONC,
   Node,
   parse,
   Project,
@@ -49,7 +51,15 @@ if (!DENO_JSON_PATH) {
   );
 }
 let denoJsonText = await Deno.readTextFile(DENO_JSON_PATH);
-let denoJson = JSON.parse(denoJsonText);
+const ext = extname(DENO_JSON_PATH);
+let denoJson;
+if (ext === ".json") {
+  denoJson = JSON.parse(denoJsonText);
+} else if (ext === ".jsonc") {
+  denoJson = JSONC.parse(denoJsonText);
+} else {
+  throw new Error(`Unsupported file extension: ${ext}`);
+}
 if (denoJson.importMap) {
   const IMPORT_MAP_PATH = join(resolvedDirectory, denoJson.importMap);
   const importMapText = await Deno.readTextFile(IMPORT_MAP_PATH);