use same logic for creating subdomain

Author: KianNH

bin/post-preview-url-comment/index.node.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, test } from "vitest";
 import { DOCS_BASE_URL, PREVIEW_URL_REGEX } from "./constants";
-import { filenameToPath } from "./util";
+import { filenameToPath, branchToSubdomain } from "./util";
 
 test("PREVIEW_URL_REGEX", () => {
 	const comment =
@@ -13,6 +13,20 @@ test("PREVIEW_URL_REGEX", () => {
 	);
 });
 
+describe("branchToSubdomain", () => {
+	test("slash", () => {
+		expect(branchToSubdomain("kian/pcx-15803")).toEqual("kian-pcx-15803");
+	});
+
+	test("normal", () => {
+		expect(branchToSubdomain("pcx-15803")).toEqual("pcx-15803");
+	});
+
+	test("capitalisation", () => {
+		expect(branchToSubdomain("PCX-15803")).toEqual("pcx-15803");
+	});
+});
+
 describe("filenameToPath", () => {
 	test("index", () => {
 		expect(filenameToPath("src/content/docs/workers/index.mdx")).toEqual(

bin/post-preview-url-comment/index.ts

@@ -8,7 +8,7 @@ import {
 	PREVIEW_URL_REGEX,
 } from "./constants";
 
-import { filenameToPath, slug } from "./util";
+import { filenameToPath, branchToSubdomain } from "./util";
 
 async function run(): Promise<void> {
 	try {
@@ -51,7 +51,7 @@ async function run(): Promise<void> {
 		);
 
 		const previewUrl = {
-			branch: `https://${slug(process.env.GITHUB_REF_NAME)}.preview.developers.cloudflare.com`,
+			branch: `https://${branchToSubdomain(process.env.GITHUB_REF_NAME)}.preview.developers.cloudflare.com`,
 			commit: `https://${ctx.sha.slice(0, 8)}.preview.developers.cloudflare.com`,
 		};
 

bin/post-preview-url-comment/util.ts

@@ -1,5 +1,5 @@
 import { slug } from "github-slugger";
-
+import { execSync } from "node:child_process";
 import { CONTENT_BASE_PATH } from "./constants";
 
 export const filenameToPath = (filename: string) => {
@@ -30,4 +30,9 @@ export const filenameToPath = (filename: string) => {
 		.concat("/");
 };
 
-export { slug };
+export const branchToSubdomain = (branch: string) => {
+	return execSync(
+		`echo "${branch}" | iconv -c -t ascii//TRANSLIT | sed -E 's/[~^]+//g' | sed -E 's/[^a-zA-Z0-9]+/-/g' | sed -E 's/^-+|-+$//g' | tr A-Z a-z`,
+		{ encoding: "utf-8" },
+	).trim();
+};