Move to .js file

Author: jamesdaniels

packages/util/autoinit_env.js

@@ -0,0 +1 @@
+export default {"config":{"projectId":"web-frameworks-e2e","appId":"1:1087080420931:web:a3151cc6bccd2e1aa1a6f6","databaseURL":"https://web-frameworks-e2e-default-rtdb.firebaseio.com","storageBucket":"web-frameworks-e2e.firebasestorage.app","authDomain":"web-frameworks-e2e.firebaseapp.com","messagingSenderId":"1087080420931","apiKey":"AIzaSyCgZEulMefCoYike_SESqhPW0dTwo5nWxs"}}

packages/util/autoinit_env.mjs

@@ -27,7 +27,8 @@
     "./package.json": "./package.json"
   },
   "files": [
-    "dist"
+    "dist",
+    "postinstall.js"
   ],
   "scripts": {
     "lint": "eslint -c .eslintrc.js '**/*.ts' --ignore-path '../../.gitignore'",
@@ -44,7 +45,7 @@
     "trusted-type-check": "tsec -p tsconfig.json --noEmit",
     "api-report": "api-extractor run --local --verbose",
     "typings:public": "node ../../scripts/build/use_typings.js ./dist/util-public.d.ts",
-    "postinstall": "node ./dist/postinstall.js"
+    "postinstall": "node ./postinstall.js"
   },
   "license": "Apache-2.0",
   "dependencies": {

packages/util/package.json

@@ -0,0 +1,90 @@
+const { writeFile, readFile } = require("node:fs/promises");
+const { pathToFileURL } = require("node:url");
+const { isAbsolute, join } = require("node:path");
+
+function getConfigFromEnv() {
+    if (!process.env.FIREBASE_WEBAPP_CONFIG) {
+        return Promise.resolve(undefined);
+    }
+    
+    // Like FIREBASE_CONFIG (admin autoinit) FIREBASE_WEBAPP_CONFIG can be
+    // either a JSON representation of FirebaseOptions or the path to a filename
+    if (process.env.FIREBASE_WEBAPP_CONFIG.startsWith("{\"")) {
+        try {
+            return Promise.resolve(JSON.parse(process.env.FIREBASE_WEBAPP_CONFIG));
+        } catch(e) {
+            console.error("FIREBASE_WEBAPP_CONFIG could not be parsed.\n", e);
+            return Promise.resolve(undefined);
+        }
+    }
+
+    const fileName = process.env.FIREBASE_WEBAPP_CONFIG;
+    const fileURL = pathToFileURL(isAbsolute(fileName) ? fileName : join(process.cwd(), fileName));
+    return readFile(fileURL, "utf-8").then((fileContents) => {
+        try {
+            return JSON.parse(fileContents);
+        } catch(e) {
+            console.error(`Contents of "${fileName}" could not be parsed.\n`, e);
+            return undefined;
+        }
+    }, (e) => {
+        console.error(`Contents of "${fileName}" could not be parsed.\n`, e);
+        return undefined;
+    });
+}
+
+getConfigFromEnv().then((partialConfig) => {
+
+    if (!partialConfig) {
+        return undefined;
+    }
+    // In Firebase App Hosting the config provided to the environment variable is up-to-date and
+    // "complete" we should not reach out to the webConfig endpoint to freshen it
+    if (process.env.X_GOOGLE_TARGET_PLATFORM === "fah") {
+        return partialConfig;
+    }
+    const projectId = partialConfig.projectId || "-";
+    const appId = partialConfig.appId;
+    const apiKey = partialConfig.apiKey;
+    if (!appId || !apiKey) {
+        console.error(`Unable to fetch Firebase config, appId and apiKey are required.`);
+        return undefined;
+    }
+    
+    return fetch(
+        `https://firebase.googleapis.com/v1alpha/projects/${projectId}/apps/${appId}/webConfig`,
+        { headers: { "x-goog-api-key": apiKey } }
+    ).then((response) => {
+        if (!response.ok) {
+            console.error(`Unable to fetch Firebase config, API returned ${response.statusText} (${response.status})`);
+            return undefined;
+        }
+        return response.json().then((json) => ({ ...json, apiKey }));
+    });
+
+}).then((config) => {
+
+    const emulatorHosts = Object.entries({
+        firestore: process.env.FIRESTORE_EMULATOR_HOST,
+        database: process.env.FIREBASE_DATABASE_EMULATOR_HOST,
+        storage: process.env.FIREBASE_STORAGE_EMULATOR_HOST,
+        auth: process.env.FIREBASE_AUTH_EMULATOR_HOST,
+    }).reduce(
+        // We want a falsy value if none of the above are defined
+        (current, [key, value]) => value ? { ...current, [key]: value } : current,
+        undefined
+    );
+    
+    // getDefaults() will use this object, rather than fallback to other autoinit suppliers, if it's
+    // truthy—if we've done nothing here, make it falsy.
+    const defaults = (config || emulatorHosts) ? { config, emulatorHosts } : undefined;
+
+    return Promise.all([
+        writeFile(join(__dirname, "autoinit_env.js"), `module.exports = ${JSON.stringify(defaults)}`),
+        writeFile(join(__dirname, "autoinit_env.mjs"), `export default ${JSON.stringify(defaults)}`),
+    ]);
+
+}).then(
+    () => process.exit(0),
+    () => process.exit(0),
+);

packages/util/postinstall.js

@@ -89,15 +89,6 @@ const autoinitBuild = [
       format: 'es',
     },
     plugins: buildPlugins,
-  },
-  { 
-    input: './postinstall.ts',
-    output: {
-      file: './dist/postinstall.js',
-      format: 'cjs',
-    },
-    plugins: buildPlugins,
-    external: () => true,
   }
 ]