bunch of tweaks to get TS working

build/index.js

@@ -0,0 +1,178 @@
+import { readFileSync } from 'node:fs';
+import { resolve, dirname, relative, join, basename, extname } from 'node:path';
+
+/** The kind of an entrypoint in an extension manifest. */
+var ManifestEntrypointKind;
+(function (ManifestEntrypointKind) {
+    /** Javascript run as part of a content script */
+    ManifestEntrypointKind[ManifestEntrypointKind["CONTENT_SCRIPT_JS"] = 0] = "CONTENT_SCRIPT_JS";
+    /** CSS applied as part of a content script */
+    ManifestEntrypointKind[ManifestEntrypointKind["CONTENT_SCRIPT_CSS"] = 1] = "CONTENT_SCRIPT_CSS";
+    /** Javascript run in the background page of an MV2 extension */
+    ManifestEntrypointKind[ManifestEntrypointKind["BACKGROUND_SCRIPT"] = 2] = "BACKGROUND_SCRIPT";
+    /** Javascript run the service worker of an MV3 extension */
+    ManifestEntrypointKind[ManifestEntrypointKind["BACKGROUND_SERVICE_WORKER"] = 3] = "BACKGROUND_SERVICE_WORKER";
+    /** Image file loaded as the extension's icon at a particular size */
+    ManifestEntrypointKind[ManifestEntrypointKind["ICON"] = 4] = "ICON";
+    /** Path listed in the `web_accessible_resources` of an MV2 extension */
+    ManifestEntrypointKind[ManifestEntrypointKind["WEB_ACCESSIBLE_RESOURCE_V2"] = 5] = "WEB_ACCESSIBLE_RESOURCE_V2";
+    /** Path listed in the `web_accessible_resources` of an MV3 extension */
+    ManifestEntrypointKind[ManifestEntrypointKind["WEB_ACCESSIBLE_RESOURCE_V3"] = 6] = "WEB_ACCESSIBLE_RESOURCE_V3";
+})(ManifestEntrypointKind || (ManifestEntrypointKind = {}));
+/**
+ * Gets all script entrypoints from a manifest, returning them as
+ * {@link ManifestEntrypoint} objects which allow for rewriting the path of each
+ * individual entrypoint in place.
+ * @param manifest Parsed `manifest.json` data.
+ */
+const getScriptEntrypoints = (manifest) => {
+    var _a, _b, _c;
+    return [
+        ...((_a = manifest.content_scripts) !== null && _a !== void 0 ? _a : []).flatMap(script => {
+            var _a;
+            return ((_a = script.js) !== null && _a !== void 0 ? _a : []).map((path, i) => ({
+                type: ManifestEntrypointKind.CONTENT_SCRIPT_JS,
+                path,
+                replacePath: (newPath) => script.js.splice(i, 1, newPath),
+            }));
+        }),
+        ...(manifest.manifest_version === 2
+            ? (((_b = manifest.background) === null || _b === void 0 ? void 0 : _b.scripts) || []).map((path, i) => ({
+                type: ManifestEntrypointKind.BACKGROUND_SCRIPT,
+                path,
+                replacePath: (newPath) => manifest.background.scripts.splice(i, 1, newPath),
+            }))
+            : (((_c = manifest.background) === null || _c === void 0 ? void 0 : _c.service_worker) ? [{
+                    type: ManifestEntrypointKind.BACKGROUND_SERVICE_WORKER,
+                    path: manifest.background.service_worker,
+                    replacePath: (newPath) => manifest.background.service_worker = newPath,
+                }] : [])),
+    ];
+};
+/**
+ * Gets all asset entrypoints from a manifest, returning them as
+ * {@link ManifestEntrypoint} objects which allow for rewriting the path of each
+ * individual entrypoint in place.
+ * @param manifest Parsed `manifest.json` data.
+ */
+const getAssetEntrypoints = (manifest) => {
+    var _a, _b, _c;
+    return [
+        ...((_a = manifest.content_scripts) !== null && _a !== void 0 ? _a : []).flatMap(script => {
+            var _a;
+            return ((_a = script.css) !== null && _a !== void 0 ? _a : []).map((path, i) => ({
+                type: ManifestEntrypointKind.CONTENT_SCRIPT_CSS,
+                path,
+                replacePath: (newPath) => script.css.splice(i, 1, newPath),
+            }));
+        }),
+        ...Object.entries(manifest.icons || {}).map(([iconSize, path]) => ({
+            type: ManifestEntrypointKind.ICON,
+            path,
+            replacePath: (newPath) => manifest.icons[iconSize] = newPath,
+        })),
+        ...(manifest.manifest_version === 2
+            ? ((_b = manifest.web_accessible_resources) !== null && _b !== void 0 ? _b : []).map((path, i) => ({
+                type: ManifestEntrypointKind.WEB_ACCESSIBLE_RESOURCE_V2,
+                path,
+                replacePath: (newPath) => manifest.web_accessible_resources[i] = newPath,
+            }))
+            : ((_c = manifest.web_accessible_resources) !== null && _c !== void 0 ? _c : []).flatMap(entry => entry.resources.map((path, i) => ({
+                type: ManifestEntrypointKind.WEB_ACCESSIBLE_RESOURCE_V3,
+                path,
+                replacePath: (newPath) => entry.resources.splice(i, 1, newPath),
+            }))))
+    ];
+};
+
+/* eslint-env node */
+function buildConfig({ manifest: manifestPathRelative, outDir, scriptPlugins = [], sourcemap, }) {
+    const manifestPath = resolve(process.cwd(), manifestPathRelative);
+    const manifestDirname = dirname(manifestPath);
+    // Load the manifest
+    let manifestContent;
+    try {
+        manifestContent = JSON.parse(readFileSync(manifestPath, { encoding: 'utf-8' }));
+    }
+    catch (error) {
+        throw new Error('Failed to load manifest');
+    }
+    const uniqueFileNameSegmentCache = new Map();
+    function uniqueFileNameSegment(filepath, ext = extname(filepath).slice(1)) {
+        // console.log('getting segment for', filepath);
+        const cached = uniqueFileNameSegmentCache.get(filepath);
+        if (cached) {
+            return cached;
+        }
+        const idealName = join(dirname(filepath), basename(filepath, extname(filepath)));
+        const buildName = (str, n) => n ? `${str}_${n}.${ext}` : `${str}.${ext}`;
+        let uniquenessNum = 0;
+        const existingNames = [...uniqueFileNameSegmentCache.values()];
+        while (existingNames.some(existingName => existingName.toLowerCase() === buildName(idealName, uniquenessNum).toLowerCase())) {
+            uniquenessNum += 1;
+        }
+        const finalName = buildName(idealName, uniquenessNum);
+        uniqueFileNameSegmentCache.set(filepath, finalName);
+        return finalName;
+    }
+    function getOutputFilename(entryPath, ext) {
+        // return join(dirname(entryPath), uniqueFileNameSegment(entryPath,
+        // ext));
+        return uniqueFileNameSegment(entryPath, ext);
+    }
+    const scripts = getScriptEntrypoints(manifestContent);
+    const assets = getAssetEntrypoints(manifestContent);
+    return [
+        // Process each script entrypoint independently
+        ...scripts.map(({ path, replacePath }) => {
+            // Figure out where this bundle will live in the output
+            const outPath = getOutputFilename(path, 'js');
+            // Rewrite the manifest with that path
+            replacePath(outPath);
+            // Build the bundle
+            return {
+                input: relative(process.cwd(), join(manifestDirname, path)),
+                output: {
+                    file: join(outDir, outPath),
+                    format: 'iife',
+                    sourcemap,
+                },
+                plugins: scriptPlugins,
+            };
+        }),
+        // Special step that processes the manifest and injects other assets
+        {
+            input: manifestPathRelative,
+            output: {
+                file: join(outDir, 'manifest.json'),
+            },
+            plugins: [
+                {
+                    name: '_manifest-asset-processing',
+                    // emit other assets
+                    buildStart() {
+                        assets.forEach(({ path, replacePath }) => {
+                            // Figure out where the asset will live in output
+                            const outPath = getOutputFilename(path);
+                            // Rewrite the manifest with that path
+                            replacePath(outPath);
+                            // Emit the asset as part of the build step
+                            this.emitFile({
+                                type: 'asset',
+                                fileName: outPath,
+                                source: readFileSync(join(manifestDirname, path)),
+                            });
+                        });
+                    },
+                    // hacks to make sure the manifest is emitted as bare JSON
+                    load: id => id === manifestPath ? 'debugger;' : null,
+                    renderChunk: (_, chunk) => chunk.facadeModuleId === manifestPath
+                        ? JSON.stringify(manifestContent, null, '\t')
+                        : null,
+                },
+            ],
+        },
+    ];
+}
+
+export { buildConfig };

entrypoints.ts

@@ -41,18 +41,18 @@ export const getScriptEntrypoints = (manifest: chrome.runtime.Manifest): Manifes
 	...(manifest.content_scripts ?? []).flatMap(script => (script.js ?? []).map((path, i) => ({
 		type: ManifestEntrypointKind.CONTENT_SCRIPT_JS,
 		path,
-		replacePath: newPath => script.js!.splice(i, 1, newPath),
+		replacePath: (newPath: string) => script.js!.splice(i, 1, newPath),
 	}))),
 	...(manifest.manifest_version === 2
 			? (manifest.background?.scripts || []).map((path, i) => ({
 				type: ManifestEntrypointKind.BACKGROUND_SCRIPT,
 				path,
-				replacePath: newPath => manifest.background!.scripts!.splice(i, 1, newPath),
+				replacePath: (newPath: string) => manifest.background!.scripts!.splice(i, 1, newPath),
 			}))
 			: (manifest.background?.service_worker ? [{
 				type: ManifestEntrypointKind.BACKGROUND_SERVICE_WORKER,
 				path: manifest.background.service_worker,
-				replacePath: newPath => manifest.background!.service_worker = newPath,
+				replacePath: (newPath: string) => manifest.background!.service_worker = newPath,
 			}] : [])
 	),
 ];
@@ -67,23 +67,23 @@ export const getAssetEntrypoints = (manifest: chrome.runtime.Manifest): Manifest
 	...(manifest.content_scripts ?? []).flatMap(script => (script.css ?? []).map((path, i) => ({
 		type: ManifestEntrypointKind.CONTENT_SCRIPT_CSS,
 		path,
-		replacePath: newPath => script.css!.splice(i, 1, newPath),
+		replacePath: (newPath: string) => script.css!.splice(i, 1, newPath),
 	}))),
 	...Object.entries(manifest.icons || {}).map(([iconSize, path]) => ({
 		type: ManifestEntrypointKind.ICON,
 		path,
-		replacePath: newPath => manifest.icons![iconSize] = newPath,
+		replacePath: (newPath: string) => manifest.icons![iconSize as unknown as number] = newPath,
 	})),
 	...(manifest.manifest_version === 2
 		? (manifest.web_accessible_resources ?? []).map((path, i) => ({
 			type: ManifestEntrypointKind.WEB_ACCESSIBLE_RESOURCE_V2,
 			path,
-			replacePath: newPath => manifest.web_accessible_resources![i] = newPath,
+			replacePath: (newPath: string) => manifest.web_accessible_resources![i] = newPath,
 		}))
 		: (manifest.web_accessible_resources ?? []).flatMap(entry => entry.resources.map((path, i) => ({
 			type: ManifestEntrypointKind.WEB_ACCESSIBLE_RESOURCE_V3,
 			path,
-			replacePath: newPath => entry.resources.splice(i, 1, newPath),
+			replacePath: (newPath: string) => entry.resources.splice(i, 1, newPath),
 		})))
 	)
 ];

index.ts

@@ -2,19 +2,27 @@
 
 import {readFileSync} from 'node:fs';
 import {resolve, basename, extname, dirname, relative, join} from 'node:path';
+
 import {getAssetEntrypoints, getScriptEntrypoints} from './entrypoints';
 
+import {type RollupOptions, type Plugin} from 'rollup';
+
 export function buildConfig ({
 	manifest: manifestPathRelative,
 	outDir,
 	scriptPlugins = [],
 	sourcemap,
-}) {
+}: {
+	manifest: string;
+	outDir: string;
+	scriptPlugins: Plugin[];
+	sourcemap: boolean | 'inline' | 'hidden';
+}): RollupOptions[] {
 	const manifestPath = resolve(process.cwd(), manifestPathRelative);
 	const manifestDirname = dirname(manifestPath);
 
 	// Load the manifest
-	let manifestContent;
+	let manifestContent: chrome.runtime.Manifest;
 	try {
 		manifestContent = JSON.parse(readFileSync(manifestPath, {encoding: 'utf-8'}));
 	} catch (error) {
@@ -22,15 +30,15 @@ export function buildConfig ({
 	}
 
 	const uniqueFileNameSegmentCache = new Map();
-	function uniqueFileNameSegment (filepath, ext = extname(filepath).slice(1)) {
+	function uniqueFileNameSegment (filepath: string, ext = extname(filepath).slice(1)) {
 		// console.log('getting segment for', filepath);
 		const cached = uniqueFileNameSegmentCache.get(filepath);
 		if (cached) {
 			return cached;
 		}
-		const idealName = basename(filepath, extname(filepath));
+		const idealName = join(dirname(filepath), basename(filepath, extname(filepath)));
 
-		const buildName = (str, n) => n ? `${str}_${n}.${ext}` : `${str}.${ext}`;
+		const buildName = (str: string, n: number) => n ? `${str}_${n}.${ext}` : `${str}.${ext}`;
 
 		let uniquenessNum = 0;
 		const existingNames = [...uniqueFileNameSegmentCache.values()];
@@ -43,9 +51,10 @@ export function buildConfig ({
 		return finalName;
 	}
 
-	function getOutputFilename (entryPath, ext?) {
+	function getOutputFilename (entryPath: string, ext?: string) {
-		const base = relative(manifestDirname, dirname(entryPath));
+		// return join(dirname(entryPath), uniqueFileNameSegment(entryPath,
-		return join(base, uniqueFileNameSegment(entryPath, ext));
+		// ext));
+		return uniqueFileNameSegment(entryPath, ext);
 	}
 
 	const scripts = getScriptEntrypoints(manifestContent);
@@ -62,10 +71,10 @@ export function buildConfig ({
 
 			// Build the bundle
 			return {
-				input: relative(process.cwd(), path),
+				input: relative(process.cwd(), join(manifestDirname, path)),
 				output: {
 					file: join(outDir, outPath),
-					format: 'iife',
+					format: 'iife' as const,
 					sourcemap,
 				},
 				plugins: scriptPlugins,
@@ -80,6 +89,7 @@ export function buildConfig ({
 			},
 			plugins: [
 				{
+					name: '_manifest-asset-processing',
 					// emit other assets
 					buildStart () {
 						assets.forEach(({path, replacePath}) => {
@@ -93,7 +103,7 @@ export function buildConfig ({
 							this.emitFile({
 								type: 'asset',
 								fileName: outPath,
-								source: readFileSync(path),
+								source: readFileSync(join(manifestDirname, path)),
 							});
 						});
 					},

package-lock.json

@@ -8,9 +8,66 @@
       "name": "rollup-create-webext-config",
       "version": "0.0.0",
       "devDependencies": {
-        "@types/chrome": "^0.0.242"
+        "@rollup/plugin-typescript": "^11.1.2",
+        "@tsconfig/recommended": "^1.0.2",
+        "@types/chrome": "^0.0.242",
+        "rollup": "^3.26.3"
       }
     },
+    "node_modules/@rollup/plugin-typescript": {
+      "version": "11.1.2",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-typescript/-/plugin-typescript-11.1.2.tgz",
+      "integrity": "sha512-0ghSOCMcA7fl1JM+0gYRf+Q/HWyg+zg7/gDSc+fRLmlJWcW5K1I+CLRzaRhXf4Y3DRyPnnDo4M2ktw+a6JcDEg==",
+      "dev": true,
+      "dependencies": {
+        "@rollup/pluginutils": "^5.0.1",
+        "resolve": "^1.22.1"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      },
+      "peerDependencies": {
+        "rollup": "^2.14.0||^3.0.0",
+        "tslib": "*",
+        "typescript": ">=3.7.0"
+      },
+      "peerDependenciesMeta": {
+        "rollup": {
+          "optional": true
+        },
+        "tslib": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@rollup/pluginutils": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-5.0.2.tgz",
+      "integrity": "sha512-pTd9rIsP92h+B6wWwFbW8RkZv4hiR/xKsqre4SIuAOaOEQRxi0lqLke9k2/7WegC85GgUs9pjmOjCUi3In4vwA==",
+      "dev": true,
+      "dependencies": {
+        "@types/estree": "^1.0.0",
+        "estree-walker": "^2.0.2",
+        "picomatch": "^2.3.1"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      },
+      "peerDependencies": {
+        "rollup": "^1.20.0||^2.0.0||^3.0.0"
+      },
+      "peerDependenciesMeta": {
+        "rollup": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@tsconfig/recommended": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@tsconfig/recommended/-/recommended-1.0.2.tgz",
+      "integrity": "sha512-dbHBtbWBOjq0/otpopAE02NT2Cm05Qe2JsEKeCf/wjSYbI2hz8nCqnpnOJWHATgjDz4fd3dchs3Wy1gQGjfN6w==",
+      "dev": true
+    },
     "node_modules/@types/chrome": {
       "version": "0.0.242",
       "resolved": "https://registry.npmjs.org/@types/chrome/-/chrome-0.0.242.tgz",
@@ -21,6 +78,12 @@
         "@types/har-format": "*"
       }
     },
+    "node_modules/@types/estree": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.1.tgz",
+      "integrity": "sha512-LG4opVs2ANWZ1TJoKc937iMmNstM/d0ae1vNbnBvBhqCSezgVUOzcLCqbI5elV8Vy6WKwKjaqR+zO9VKirBBCA==",
+      "dev": true
+    },
     "node_modules/@types/filesystem": {
       "version": "0.0.32",
       "resolved": "https://registry.npmjs.org/@types/filesystem/-/filesystem-0.0.32.tgz",
@@ -41,6 +104,133 @@
       "resolved": "https://registry.npmjs.org/@types/har-format/-/har-format-1.2.11.tgz",
       "integrity": "sha512-T232/TneofqK30AD1LRrrf8KnjLvzrjWDp7eWST5KoiSzrBfRsLrWDPk4STQPW4NZG6v2MltnduBVmakbZOBIQ==",
       "dev": true
+    },
+    "node_modules/estree-walker": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.2.tgz",
+      "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==",
+      "dev": true
+    },
+    "node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
+    "node_modules/function-bind": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
+      "dev": true
+    },
+    "node_modules/has": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
+      "integrity": "sha512-f2dvO0VU6Oej7RkWJGrehjbzMAjFp5/VKPp5tTpWIV4JHHZK1/BxbFRtf/siA2SWTe09caDmVtYYzWEIbBS4zw==",
+      "dev": true,
+      "dependencies": {
+        "function-bind": "^1.1.1"
+      },
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
+    "node_modules/is-core-module": {
+      "version": "2.12.1",
+      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.12.1.tgz",
+      "integrity": "sha512-Q4ZuBAe2FUsKtyQJoQHlvP8OvBERxO3jEmy1I7hcRXcJBGGHFh/aJBswbXuS9sgrDH2QUO8ilkwNPHvHMd8clg==",
+      "dev": true,
+      "dependencies": {
+        "has": "^1.0.3"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/path-parse": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.7.tgz",
+      "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==",
+      "dev": true
+    },
+    "node_modules/picomatch": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/resolve": {
+      "version": "1.22.2",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.2.tgz",
+      "integrity": "sha512-Sb+mjNHOULsBv818T40qSPeRiuWLyaGMa5ewydRLFimneixmVy2zdivRl+AF6jaYPC8ERxGDmFSiqui6SfPd+g==",
+      "dev": true,
+      "dependencies": {
+        "is-core-module": "^2.11.0",
+        "path-parse": "^1.0.7",
+        "supports-preserve-symlinks-flag": "^1.0.0"
+      },
+      "bin": {
+        "resolve": "bin/resolve"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/rollup": {
+      "version": "3.26.3",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-3.26.3.tgz",
+      "integrity": "sha512-7Tin0C8l86TkpcMtXvQu6saWH93nhG3dGQ1/+l5V2TDMceTxO7kDiK6GzbfLWNNxqJXm591PcEZUozZm51ogwQ==",
+      "dev": true,
+      "bin": {
+        "rollup": "dist/bin/rollup"
+      },
+      "engines": {
+        "node": ">=14.18.0",
+        "npm": ">=8.0.0"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
+      }
+    },
+    "node_modules/supports-preserve-symlinks-flag": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
+      "integrity": "sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/typescript": {
+      "version": "5.1.6",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.1.6.tgz",
+      "integrity": "sha512-zaWCozRZ6DLEWAWFrVDz1H6FVXzUSfTy5FUMWsQlU8Ym5JP9eO4xkTIROFCQvhQf61z6O/G6ugw3SgAnvvm+HA==",
+      "dev": true,
+      "peer": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
     }
   }
 }

package.json

@@ -1,8 +1,12 @@
 {
   "name": "rollup-create-webext-config",
   "version": "0.0.0",
-  "main": "index.mjs",
+  "main": "build/index.js",
+  "type": "module",
   "devDependencies": {
-    "@types/chrome": "^0.0.242"
+    "@rollup/plugin-typescript": "^11.1.2",
+    "@tsconfig/recommended": "^1.0.2",
+    "@types/chrome": "^0.0.242",
+    "rollup": "^3.26.3"
   }
 }

rollup.config.js

@@ -0,0 +1,17 @@
+import {defineConfig} from 'rollup';
+import typescript from '@rollup/plugin-typescript';
+
+export default defineConfig({
+	input: 'index.ts',
+	output: {
+		format: 'es',
+		dir: 'build',
+	},
+	external: [
+		'node:fs',
+		'node:path',
+	],
+	plugins: [
+		typescript(),
+	],
+});

tsconfig.json

@@ -0,0 +1,3 @@
+{
+	"extends": "@tsconfig/recommended/tsconfig.json"
+}