feat: add changeset validation and release workflow

.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

.changeset/changelog-generator.mjs

@@ -0,0 +1,133 @@
+import { getInfo, getInfoFromPullRequest } from "@changesets/get-github-info";
+
+/** @typedef {import("@changesets/types").ChangelogFunctions} ChangelogFunctions */
+
+/**
+ * @returns {{ GITHUB_SERVER_URL: string }} value
+ */
+function readEnv() {
+  const GITHUB_SERVER_URL =
+    process.env.GITHUB_SERVER_URL || "https://github.com";
+  return { GITHUB_SERVER_URL };
+}
+
+/** @type {ChangelogFunctions} */
+const changelogFunctions = {
+  getDependencyReleaseLine: async (
+    changesets,
+    dependenciesUpdated,
+    options,
+  ) => {
+    if (!options.repo) {
+      throw new Error(
+        'Please provide a repo to this changelog generator like this:\n"changelog": ["@changesets/changelog-github", { "repo": "org/repo" }]',
+      );
+    }
+    if (dependenciesUpdated.length === 0) return "";
+
+    const changesetLink = `- Updated dependencies [${(
+      await Promise.all(
+        changesets.map(async (cs) => {
+          if (cs.commit) {
+            const { links } = await getInfo({
+              repo: options.repo,
+              commit: cs.commit,
+            });
+            return links.commit;
+          }
+        }),
+      )
+    )
+      .filter(Boolean)
+      .join(", ")}]:`;
+
+    const updatedDependenciesList = dependenciesUpdated.map(
+      (dependency) => `  - ${dependency.name}@${dependency.newVersion}`,
+    );
+
+    return [changesetLink, ...updatedDependenciesList].join("\n");
+  },
+  getReleaseLine: async (changeset, type, options) => {
+    const { GITHUB_SERVER_URL } = readEnv();
+    if (!options || !options.repo) {
+      throw new Error(
+        'Please provide a repo to this changelog generator like this:\n"changelog": ["@changesets/changelog-github", { "repo": "org/repo" }]',
+      );
+    }
+
+    /** @type {number | undefined} */
+    let prFromSummary;
+    /** @type {string | undefined} */
+    let commitFromSummary;
+    /** @type {string[]} */
+    const usersFromSummary = [];
+
+    const replacedChangelog = changeset.summary
+      .replace(/^\s*(?:pr|pull|pull\s+request):\s*#?(\d+)/im, (_, pr) => {
+        const num = Number(pr);
+        if (!Number.isNaN(num)) prFromSummary = num;
+        return "";
+      })
+      .replace(/^\s*commit:\s*([^\s]+)/im, (_, commit) => {
+        commitFromSummary = commit;
+        return "";
+      })
+      .replaceAll(/^\s*(?:author|user):\s*@?([^\s]+)/gim, (_, user) => {
+        usersFromSummary.push(user);
+        return "";
+      })
+      .trim();
+
+    const [firstLine, ...futureLines] = replacedChangelog
+      .split("\n")
+      .map((l) => l.trimEnd());
+
+    const links = await (async () => {
+      if (prFromSummary !== undefined) {
+        let { links } = await getInfoFromPullRequest({
+          repo: options.repo,
+          pull: prFromSummary,
+        });
+        if (commitFromSummary) {
+          const shortCommitId = commitFromSummary.slice(0, 7);
+          links = {
+            ...links,
+            commit: `[\`${shortCommitId}\`](${GITHUB_SERVER_URL}/${options.repo}/commit/${commitFromSummary})`,
+          };
+        }
+        return links;
+      }
+      const commitToFetchFrom = commitFromSummary || changeset.commit;
+      if (commitToFetchFrom) {
+        const { links } = await getInfo({
+          repo: options.repo,
+          commit: commitToFetchFrom,
+        });
+        return links;
+      }
+      return {
+        commit: null,
+        pull: null,
+        user: null,
+      };
+    })();
+
+    const users = usersFromSummary.length
+      ? usersFromSummary
+          .map(
+            (userFromSummary) =>
+              `[@${userFromSummary}](${GITHUB_SERVER_URL}/${userFromSummary})`,
+          )
+          .join(", ")
+      : links.user;
+
+    let suffix = "";
+    if (links.pull || links.commit || users) {
+      suffix = `(${users ? `by ${users} ` : ""}in ${links.pull || links.commit})`;
+    }
+
+    return `\n\n- ${firstLine} ${suffix}\n${futureLines.map((l) => `  ${l}`).join("\n")}`;
+  },
+};
+
+export default changelogFunctions;

.changeset/changeset-validate.mjs

@@ -0,0 +1,140 @@
+/* eslint-disable no-console */
+import fs from "node:fs/promises";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { simpleGit } from "simple-git";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const rootPath = path.join(__dirname, "..");
+const git = simpleGit(rootPath);
+
+const pkgJson = JSON.parse(
+  await fs.readFile(path.join(rootPath, "package.json"), "utf8"),
+);
+
+const VALID_BUMPS = new Set(["major", "minor", "patch"]);
+const FRONTMATTER_RE = /^---\r?\n([\s\S]*?)\r?\n---(?:\r?\n|$)/;
+const ENTRY_RE = /^"([^"]+)"\s*:\s*([a-zA-Z]+)\s*$/;
+
+const toLines = (output) =>
+  output
+    .split(/\r?\n/)
+    .map((line) => line.trim())
+    .filter(Boolean);
+
+const isChangeset = (filePath) => {
+  const normalized = filePath.replaceAll("\\", "/");
+  return (
+    normalized.startsWith(".changeset/") &&
+    normalized.endsWith(".md") &&
+    normalized !== ".changeset/README.md"
+  );
+};
+
+const gitDiff = async (more = []) => {
+  const args = [
+    "diff",
+    "--name-only",
+    // cspell:ignore ACMR
+    "--diff-filter=ACMR",
+    ...more,
+    "--",
+    ".changeset/*.md",
+  ].filter(Boolean);
+
+  return toLines(await git.raw(args));
+};
+
+const getChangedFiles = async () => {
+  const files = new Set();
+  const baseRef = process.env.GITHUB_BASE_REF;
+
+  // GitHub Actions base diff
+  if (baseRef) {
+    for (const file of await gitDiff([`origin/${baseRef}...HEAD`])) {
+      if (isChangeset(file)) files.add(file);
+    }
+  }
+  // Local working tree changes
+  else {
+    const _files = [
+      // Unstaged changes
+      ...(await gitDiff()),
+      // Staged but uncommitted changes
+      ...(await gitDiff(["--cached"])),
+      // Untracked files
+      ...(await git.status()).not_added,
+    ];
+    for (const file of _files) {
+      if (isChangeset(file)) files.add(file);
+    }
+  }
+  return files;
+};
+
+const validate = async (filePath) => {
+  const absoluteFilePath = path.join(rootPath, filePath);
+  const content = await fs.readFile(absoluteFilePath, "utf8");
+  const frontmatterMatch = content.match(FRONTMATTER_RE);
+  const errors = [];
+
+  if (!frontmatterMatch) {
+    errors.push("missing YAML frontmatter block");
+    return errors;
+  }
+
+  const entries = frontmatterMatch[1]
+    .split(/\r?\n/)
+    .map((line) => line.trim())
+    .filter(Boolean);
+
+  if (entries.length === 0) {
+    errors.push("frontmatter does not contain package bump entries");
+    return errors;
+  }
+
+  for (const entry of entries) {
+    const match = entry.match(ENTRY_RE);
+    if (!match) {
+      errors.push(`invalid frontmatter entry: ${entry}`);
+      continue;
+    }
+
+    const [, pkgName, bumpType] = match;
+    if (pkgName !== pkgJson.name) {
+      errors.push(
+        `invalid package name "${pkgName}", expected "${pkgJson.name}"`,
+      );
+    }
+
+    if (!VALID_BUMPS.has(bumpType)) {
+      errors.push(
+        `invalid bump type "${bumpType}", expected one of: major, minor, patch`,
+      );
+    }
+  }
+
+  return errors;
+};
+
+const changedFiles = await getChangedFiles();
+
+if (changedFiles.size === 0) {
+  console.log("No changed changeset files found.");
+} else {
+  const failures = [];
+  for (const filePath of changedFiles) {
+    const errors = await validate(filePath);
+    for (const error of errors) {
+      failures.push(`${filePath}: ${error}`);
+    }
+  }
+
+  if (failures.length > 0) {
+    console.error("Changeset validation failed:");
+    for (const failure of failures) {
+      console.error(`- ${failure}`);
+    }
+    process.exitCode = 1;
+  }
+}

.changeset/config.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@3.1.2/schema.json",
+  "changelog": [
+    "./changelog-generator.mjs",
+    { "repo": "webpack/webpack-dev-server" }
+  ],
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.changeset/fix-hmr-skip-user-proxy-upgrade.md

@@ -0,0 +1,5 @@
+---
+"webpack-dev-server": patch
+---
+
+Skip the HMR WebSocket path when forwarding upgrade requests to user-defined proxies, so custom proxy WebSocket upgrades are no longer intercepted by the dev server.

.github/dependabot.yml

@@ -12,3 +12,14 @@ updates:
       dependencies:
         patterns:
           - "*"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 20
+    labels:
+      - dependencies
+    groups:
+      dependencies:
+        patterns:
+          - "*"

.github/workflows/nodejs.yml

@@ -56,13 +56,14 @@ jobs:
       - name: Check types
         run: if [ -n "$(git status types --porcelain)" ]; then echo "Missing types. Update types by running 'npm run build:types'"; exit 1; else echo "All types are valid"; fi
 
-      - name: Security audit
-        run: npm audit --production
-
       - name: Validate PR commits with commitlint
         if: github.event_name == 'pull_request'
         run: npx commitlint --from ${{ github.event.pull_request.head.sha }}~${{ github.event.pull_request.commits }} --to ${{ github.event.pull_request.head.sha }} --verbose
 
+      - name: Validate changeset format
+        if: github.event_name == 'pull_request'
+        run: npm run validate:changeset
+
   test:
     name: Test - ${{ matrix.os }} - Node v${{ matrix.node-version == '24.15' && '24.x' || matrix.node-version }}, Webpack ${{ matrix.webpack-version }} (${{ matrix.shard }})
 

.github/workflows/release.yml

@@ -0,0 +1,42 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+permissions:
+  id-token: write # Required for OIDC
+  contents: write
+  pull-requests: write
+
+jobs:
+  release:
+    if: github.repository == 'webpack/webpack-dev-server'
+    name: Release
+    runs-on: ubuntu-latest
+    outputs:
+      published: ${{ steps.changesets.outputs.published }}
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+
+      - name: Use Node.js
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: lts/*
+          cache: npm
+
+      - run: npm ci
+
+      - name: Create Release Pull Request or Publish to npm
+        id: changesets
+        uses: changesets/action@a45c4d594aa4e2c509dc14a9f2b3b67ba3780d0d # v1.9.0
+        with:
+          publish: node ./node_modules/.bin/changeset publish
+          commit: "chore(release): new release"
+          title: "chore(release): new release"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: "" # https://github.com/changesets/changesets/issues/1152#issuecomment-3190884868