Lodash: Refactor away from _.groupBy()

.eslintrc.js

@@ -81,6 +81,7 @@ const restrictedImports = [
 			'flowRight',
 			'forEach',
 			'fromPairs',
+			'groupBy',
 			'has',
 			'identity',
 			'includes',

bin/plugin/commands/changelog.js

@@ -1,7 +1,6 @@
 /**
  * External dependencies
  */
-const { groupBy } = require( 'lodash' );
 const Octokit = require( '@octokit/rest' );
 const { sprintf } = require( 'sprintf-js' );
 const semver = require( 'semver' );
@@ -711,9 +710,19 @@ async function fetchAllPullRequests( octokit, settings ) {
 function getChangelog( pullRequests ) {
 	let changelog = '## Changelog\n\n';
 
-	const groupedPullRequests = groupBy(
-		skipCreatedByBots( pullRequests ),
-		getIssueType
+	const groupedPullRequests = skipCreatedByBots( pullRequests ).reduce(
+		(
+			/** @type {Record<string, IssuesListForRepoResponseItem[]>} */ acc,
+			pr
+		) => {
+			const issueType = getIssueType( pr );
+			if ( ! acc[ issueType ] ) {
+				acc[ issueType ] = [];
+			}
+			acc[ issueType ].push( pr );
+			return acc;
+		},
+		{}
 	);
 
 	const sortedGroups = Object.keys( groupedPullRequests ).sort( sortGroup );
@@ -732,7 +741,20 @@ function getChangelog( pullRequests ) {
 		changelog += '### ' + group + '\n\n';
 
 		// Group PRs within this section into "Features".
-		const featureGroups = groupBy( groupPullRequests, getIssueFeature );
+		const featureGroups = groupPullRequests.reduce(
+			(
+				/** @type {Record<string, IssuesListForRepoResponseItem[]>} */ acc,
+				pr
+			) => {
+				const issueFeature = getIssueFeature( pr );
+				if ( ! acc[ issueFeature ] ) {
+					acc[ issueFeature ] = [];
+				}
+				acc[ issueFeature ].push( pr );
+				return acc;
+			},
+			{}
+		);
 
 		const featuredGroupNames = sortFeatureGroups( featureGroups );
 

packages/block-editor/src/components/inserter/block-types-tab.js

@@ -1,8 +1,3 @@
-/**
- * External dependencies
- */
-import { groupBy } from 'lodash';
-
 /**
  * WordPress dependencies
  */
@@ -59,7 +54,15 @@ export function BlockTypesTab( {
 				itemList.filter(
 					( item ) => item.category && item.category !== 'reusable'
 				),
-			( itemList ) => groupBy( itemList, 'category' )
+			( itemList ) =>
+				itemList.reduce( ( acc, item ) => {
+					const { category } = item;
+					if ( ! acc[ category ] ) {
+						acc[ category ] = [];
+					}
+					acc[ category ].push( item );
+					return acc;
+				}, {} )
 		)( items );
 	}, [ items ] );
 

packages/editor/src/components/entities-saved-states/index.js

@@ -1,8 +1,3 @@
-/**
- * External dependencies
- */
-import { groupBy } from 'lodash';
-
 /**
  * WordPress dependencies
  */
@@ -83,7 +78,14 @@ export default function EntitiesSavedStates( { close } ) {
 		useDispatch( noticesStore );
 
 	// To group entities by type.
-	const partitionedSavables = groupBy( dirtyEntityRecords, 'name' );
+	const partitionedSavables = dirtyEntityRecords.reduce( ( acc, record ) => {
+		const { name } = record;
+		if ( ! acc[ name ] ) {
+			acc[ name ] = [];
+		}
+		acc[ name ].push( record );
+		return acc;
+	}, {} );
 
 	// Sort entity groups.
 	const {