Add __meta property to BCD build

scripts/release-build.js

@@ -6,6 +6,7 @@
 const fs = require('fs').promises;
 const path = require('path');
 
+const packageJson = require('../package.json');
 const stringify = require('fast-json-stable-stringify');
 
 const directory = './build/';
@@ -15,6 +16,7 @@ const verbatimFiles = ['LICENSE', 'README.md', 'index.d.ts', 'types.d.ts'];
 // Returns a string representing data ready for writing to JSON file
 function createDataBundle() {
   const bcd = require('../index.js');
+  bcd.__meta = { version: packageJson.version };
   const string = stringify(bcd);
   return string;
 }
@@ -42,7 +44,6 @@ async function copyFiles() {
 }
 
 function createManifest() {
-  const full = require('../package.json');
   const minimal = { main: 'index.js' };
 
   const minimalKeys = [
@@ -59,8 +60,8 @@ function createManifest() {
   ];
 
   for (const key of minimalKeys) {
-    if (key in full) {
-      minimal[key] = full[key];
+    if (key in packageJson) {
+      minimal[key] = packageJson[key];
     } else {
       throw `Could not create a complete manifest! ${key} is missing!`;
     }

scripts/release-build.test.js

@@ -6,13 +6,16 @@
 const assert = require('assert').strict;
 const { execSync } = require('child_process');
 
+const { version } = require('../package.json');
+
 const prebuiltPath = '../build';
 
 describe('release-build', () => {
   it('pre-built bundles are identical to the source', () => {
     execSync('npm run release-build');
     const regular = require('..');
     const bundled = require(prebuiltPath);
+    regular.__meta = { version };
     assert.deepEqual(regular, bundled);
   }).timeout(5000); // Timeout must be long enough for all the file I/O
 });

utils/walk.js

@@ -8,7 +8,7 @@ const { isBrowser, descendantKeys, joinPath } = require('./walkingUtils');
 const query = require('./query');
 
 function* lowLevelWalk(data = bcd, path, depth = Infinity) {
-  if (path !== undefined) {
+  if (path !== undefined && path !== '__meta') {
     const next = {
       path,
       data,

utils/walkingUtils.js

@@ -15,16 +15,21 @@ function isBrowser(obj) {
 }
 
 function descendantKeys(data) {
+  if (typeof data !== 'object') {
+    // Return if the data isn't an object
+    return [];
+  }
+
   if (isFeature(data)) {
-    return Object.keys(data).filter((key) => key !== '__compat');
+    return Object.keys(data).filter((key) => !key.startsWith('__'));
   }
 
   if (isBrowser(data)) {
     // Browsers never have independently meaningful descendants
     return [];
   }
 
-  return Object.keys(data);
+  return Object.keys(data).filter((key) => key !== '__meta');
 }
 
 module.exports = {