feat: Add rollup, esbuild, vite, rolldown, webpack and rspack bundler plugins

.github/workflows/CI.yml

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+name: 'Build & Test'
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: Build & Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: 'package.json'
+      - name: Install
+        run: yarn install
+      - name: Build
+        run: yarn build
+      - name: Run Unit Tests
+        run: yarn test

.gitignore

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+node_modules/
+dist/
+.DS_Store

README.md

@@ -1 +1,110 @@
 # javascript-debug-ids
+
+Bundler plugins to inject [Debug
+IDs](https://github.com/tc39/source-map/blob/main/proposals/debug-id.md) into
+both source and source-maps, making build artifacts self-identifying.
+
+## Rollup
+
+`rollup.config.mjs`
+```ts
+import debugIds from "@sentry/debug-ids/rollup";
+
+export default {
+  input: "./src/main.js",
+  plugins: [debugIds()],
+  output: {
+    dir: "dist",
+    format: "esm",
+    sourcemap: true,
+  },
+};
+```
+
+## webpack
+
+`webpack.config.mjs`
+```ts
+import { DebugIdWebpackPlugin } from "@sentry/debug-ids/webpack";
+
+export default {
+  entry: "./src/main.js",
+  plugins: [new DebugIdWebpackPlugin()],
+  mode: "production",
+  devtool: "source-map",
+  output: {
+    filename: "main.js",
+    path: "./dist",
+  },
+};
+```
+
+## esbuild
+
+`build.mjs`
+```ts
+import * as esbuild from "esbuild";
+import debugIds from "@sentry/debug-ids/esbuild";
+
+await esbuild.build({
+  entryPoints: ["./src/main.js"],
+  bundle: true,
+  format: "esm",
+  sourcemap: true,
+  minify: true,
+  plugins: [debugIds],
+  outdir: "./dist",
+});
+```
+
+## vite
+
+`vite.config.mjs`
+```ts
+import debugIds from "@sentry/debug-ids/vite";
+
+export default {
+  root: "./src",
+  mode: "production",
+  plugins: [debugIds()],
+  build: {
+    outDir: "./dist",
+    sourcemap: true,
+  },
+};
+```
+
+## rspack
+
+`rspack.config.mjs`
+```ts
+import { DebugIdRspackPlugin } from "@sentry/debug-ids/rspack";
+
+export default {
+  entry: "./src/main.js",
+  plugins: [new DebugIdRspackPlugin()],
+  mode: "production",
+  devtool: "source-map",
+  output: {
+    filename: "main.js",
+    path: "./dist",
+  },
+};
+```
+
+## Rolldown
+
+`rolldown.config.mjs`
+```ts
+import debugIds from "@sentry/debug-ids/rolldown";
+
+export default {
+  input: "./src/main.js",
+  plugins: [debugIds()],
+  output: {
+    dir: "dist",
+    format: "esm",
+    sourcemap: true,
+  },
+};
+```

package.json

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+{
+  "name": "@sentry/debug-ids",
+  "version": "0.0.1",
+  "license": "MIT",
+  "exports": {
+    "rollup": {
+      "require": "./dist/rollup.js",
+      "import": "./dist/rollup.mjs"
+    },
+    "webpack": {
+      "require": "./dist/webpack.js",
+      "import": "./dist/webpack.mjs"
+    },
+    "esbuild": {
+      "require": "./dist/esbuild.js",
+      "import": "./dist/esbuild.mjs"
+    },
+    "vite": {
+      "require": "./dist/vite.js",
+      "import": "./dist/vite.mjs"
+    },
+    "rspack": {
+      "require": "./dist/rspack.js",
+      "import": "./dist/rspack.mjs"
+    },
+    "rolldown": {
+      "require": "./dist/rolldown.js",
+      "import": "./dist/rolldown.mjs"
+    }
+  },
+  "scripts": {
+    "build": "pkgroll --clean-dist --target=es2018 --target=node14 --sourcemap",
+    "test": "vitest run ./test/**/*.test.ts"
+  },
+  "devDependencies": {
+    "@rspack/cli": "^1.0.8",
+    "@rspack/core": "^1.0.8",
+    "@types/node": "14",
+    "esbuild": "^0.24.0",
+    "pkgroll": "^2.5.0",
+    "rolldown": "^0.13.2",
+    "rollup": "^4.22.5",
+    "typescript": "^5.6.2",
+    "vite": "^5.4.8",
+    "vitest": "^2.1.1",
+    "webpack": "^5.95.0",
+    "webpack-cli": "^5.1.4"
+  },
+  "volta": {
+    "node": "20.17.0"
+  }
+}

src/common.ts

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+import * as crypto from "crypto";
+
+export const DEFAULT_EXTENSIONS = [".js", ".mjs", ".cjs"];
+
+export function stringToUUID(str: string): string {
+  const md5sum = crypto.createHash("md5");
+  md5sum.update(str);
+  const md5Hash = md5sum.digest("hex");
+
+  // Position 16 is fixed to either 8, 9, a, or b in the uuid v4 spec (10xx in binary)
+  // RFC 4122 section 4.4
+  const v4variant = ["8", "9", "a", "b"][
+    md5Hash.substring(16, 17).charCodeAt(0) % 4
+  ] as string;
+
+  return (
+    md5Hash.substring(0, 8) +
+    "-" +
+    md5Hash.substring(8, 12) +
+    "-4" +
+    md5Hash.substring(13, 16) +
+    "-" +
+    v4variant +
+    md5Hash.substring(17, 20) +
+    "-" +
+    md5Hash.substring(20)
+  ).toLowerCase();
+}
+
+export function addDebugIdToSource(input: string, debugId: string): string {
+  return input.replace(
+    /\s*(?:\/\/# debugId=.+)?\s*(\/\/# sourceMappingURL=.+)?\s*$/,
+    `\n//# debugId=${debugId}\n$1`
+  );
+}
+
+export function addDebugIdToSourcemap(input: string, debugId: string): string {
+  const sourceMapObj = JSON.parse(input);
+  sourceMapObj.debugId = debugId;
+  return JSON.stringify(sourceMapObj);
+}

src/esbuild.ts

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+import type { PluginBuild } from "esbuild";
+import {
+  addDebugIdToSource,
+  DEFAULT_EXTENSIONS,
+  stringToUUID,
+  addDebugIdToSourcemap,
+} from "./common";
+import { readFile, writeFile } from "fs/promises";
+import * as path from "path";
+
+export default {
+  name: "esbuild-plugin-debug-ids",
+  setup({ onEnd, initialOptions }: PluginBuild) {
+    if (
+      initialOptions.bundle !== true ||
+      initialOptions.sourcemap === undefined
+    ) {
+      return;
+    }
+
+    initialOptions.metafile = true;
+
+    onEnd(async (result) => {
+      const assets = Object.keys(result.metafile?.outputs || {});
+      const assetsWithCorrectExt = assets.filter((file) =>
+        DEFAULT_EXTENSIONS.some((ext) => file.endsWith(ext))
+      );
+
+      if (assetsWithCorrectExt.length === 0) {
+        return;
+      }
+
+      const promises = assetsWithCorrectExt.map(async (key) => {
+        const sourcemapKey = `${key}.map`;
+
+        // If we don't have a sourcemap, don't do anything
+        if (!assets.includes(sourcemapKey)) {
+          return Promise.resolve();
+        }
+
+        const sourcePath = path.join(process.cwd(), key);
+        const source = await readFile(sourcePath, { encoding: "utf-8" });
+        const debugId = stringToUUID(source);
+        const updatedSource = addDebugIdToSource(source, debugId);
+        await writeFile(sourcePath, updatedSource);
+
+        const sourcemapPath = path.join(process.cwd(), sourcemapKey);
+        const sourcemap = await readFile(sourcemapPath, { encoding: "utf-8" });
+        const updatedSourcemap = addDebugIdToSourcemap(sourcemap, debugId);
+        await writeFile(sourcemapPath, updatedSourcemap);
+      });
+
+      await Promise.all(promises);
+    });
+  },
+};

src/rolldown.ts

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+import rollupPlugin from "./rollup";
+
+export default rollupPlugin;

src/rollup.ts

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+import { OutputAsset, OutputChunk, Plugin } from "rollup";
+import {
+  addDebugIdToSourcemap,
+  addDebugIdToSource,
+  stringToUUID,
+  DEFAULT_EXTENSIONS,
+} from "./common";
+
+export default function debugIds(): Plugin {
+  return {
+    name: "rollup-plugin-debug-ids",
+    generateBundle: function (
+      _,
+      bundle: { [fileName: string]: OutputAsset | OutputChunk }
+    ) {
+      for (const [key, value] of Object.entries(bundle)) {
+        // We only add debugId where there is a linked sourcemap file
+        if (!("sourcemapFileName" in value) || !value.sourcemapFileName) {
+          continue;
+        }
+
+        // We only add to specific file types
+        if (!DEFAULT_EXTENSIONS.includes(key.slice(-3))) {
+          continue;
+        }
+
+        // Check we have a sourcemap in the output and it has source property
+        const sourceMapFile = bundle[value.sourcemapFileName];
+        if (!sourceMapFile || !("source" in sourceMapFile)) {
+          continue;
+        }
+
+        const debugId = stringToUUID(value.code);
+        value.code = addDebugIdToSource(value.code, debugId);
+        sourceMapFile.source = addDebugIdToSourcemap(
+          sourceMapFile.source.toString(),
+          debugId
+        );
+
+        // vite has plugins that run after us which can modify the sourcemap so we
+        // proxy the sourceMapFile to re-add the debugId if the source gets set again
+        bundle[value.sourcemapFileName] = new Proxy(
+          bundle[value.sourcemapFileName],
+          {
+            set: function (target, prop, value) {
+              if (prop === "source") {
+                target[prop] = addDebugIdToSourcemap(value, debugId);
+              } else {
+                target[prop] = value;
+              }
+              return true;
+            },
+          }
+        );
+      }
+    },
+  };
+}

src/rspack.ts

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+import { DebugIdWebpackPlugin } from "./webpack";
+
+export class DebugIdRspackPlugin extends DebugIdWebpackPlugin {}

src/vite.ts

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+import rollupPlugin from "./rollup";
+import { Plugin } from "vite";
+
+export default function debugIds(): Plugin {
+  return {
+    ...rollupPlugin(),
+    name: "vite-plugin-debug-ids",
+    apply: "build",
+    enforce: "post",
+  };
+}