build: Add release script to update relevant files and commit for next release (#3805)

* build: Add script to update package.json and commit for next release

* fix

scripts/release.js

+const fs = require("fs");
+const util = require("util");
+const exec = util.promisify(require("child_process").exec);
+const updateReadme = require("./updateReadme");
+const updateChangelog = require("./updateChangelog");
+
+const excalidrawDir = `${__dirname}/../src/packages/excalidraw`;
+const excalidrawPackage = `${excalidrawDir}/package.json`;
+
+const updatePackageVersion = (nextVersion) => {
+  const pkg = require(excalidrawPackage);
+  pkg.version = nextVersion;
+  const content = `${JSON.stringify(pkg, null, 2)}\n`;
+  fs.writeFileSync(excalidrawPackage, content, "utf-8");
+};
+
+const release = async (nextVersion) => {
+  try {
+    updateReadme();
+    await updateChangelog(nextVersion);
+    updatePackageVersion();
+    await exec(`git add -u`);
+    await exec(
+      `git commit -m "docs: release excalidraw@excalidraw@${nextVersion}  🎉"`,
+    );
+    /* eslint-disable no-console */
+    console.log("Done!");
+  } catch (e) {
+    console.error(e);
+    process.exit(1);
+  }
+};
+
+const nextVersion = process.argv.slice(2)[0];
+if (!nextVersion) {
+  console.error("Pass the next version to release!");
+  process.exit(1);
+}
+release(nextVersion);

scripts/updateChangelog.js

   fs.writeFileSync(`${excalidrawDir}/CHANGELOG.md`, updatedContent, "utf8");
 };
 
-updateChangelog();
+module.exports = updateChangelog;

scripts/updateReadme.js

 const fs = require("fs");
 
-const excalidrawDir = `${__dirname}/../src/packages/excalidraw`;
-let data = fs.readFileSync(`${excalidrawDir}/README_NEXT.md`, "utf8");
+const updateReadme = () => {
+  const excalidrawDir = `${__dirname}/../src/packages/excalidraw`;
+  let data = fs.readFileSync(`${excalidrawDir}/README_NEXT.md`, "utf8");
 
-// remove note for unstable release
-data = data.replace(
-  /<!-- unstable-readme-start-->[\s\S]*?<!-- unstable-readme-end-->/,
-  "",
-);
+  // remove note for unstable release
+  data = data.replace(
+    /<!-- unstable-readme-start-->[\s\S]*?<!-- unstable-readme-end-->/,
+    "",
+  );
 
-// replace "excalidraw-next" with "excalidraw"
-data = data.replace(/excalidraw-next/g, "excalidraw");
-data = data.trim();
+  // replace "excalidraw-next" with "excalidraw"
+  data = data.replace(/excalidraw-next/g, "excalidraw");
+  data = data.trim();
 
-const demoIndex = data.indexOf("### Demo");
-const excalidrawNextNote =
-  "#### Note\n\n**If you don't want to wait for the next stable release and try out the unreleased changes you can use [@excalidraw/excalidraw-next](https://www.npmjs.com/package/@excalidraw/excalidraw-next).**\n\n";
-// Add excalidraw next note to try out for unreleased changes
-data = data.slice(0, demoIndex) + excalidrawNextNote + data.slice(demoIndex);
+  const demoIndex = data.indexOf("### Demo");
+  const excalidrawNextNote =
+    "#### Note\n\n**If you don't want to wait for the next stable release and try out the unreleased changes you can use [@excalidraw/excalidraw-next](https://www.npmjs.com/package/@excalidraw/excalidraw-next).**\n\n";
+  // Add excalidraw next note to try out for unreleased changes
+  data = data.slice(0, demoIndex) + excalidrawNextNote + data.slice(demoIndex);
 
-// update readme
-fs.writeFileSync(`${excalidrawDir}/README.md`, data, "utf8");
+  // update readme
+  fs.writeFileSync(`${excalidrawDir}/README.md`, data, "utf8");
+};
+
+module.exports = updateReadme;