Lodash: Refactor away from _.merge()

.eslintrc.js

@@ -106,6 +106,7 @@ const restrictedImports = [
 			'mapKeys',
 			'maxBy',
 			'memoize',
+			'merge',
 			'negate',
 			'noop',
 			'nth',

packages/babel-plugin-makepot/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Internal
+
+-   Lodash: Refactor away from `_.merge()` and remove Lodash dependency ([#48239](https://github.com/WordPress/gutenberg/pull/48239)).
+
 ## 5.11.0 (2023-02-15)
 
 ## 5.10.0 (2023-02-01)

packages/babel-plugin-makepot/index.js

@@ -32,8 +32,9 @@
  * External dependencies
  */
 
+const deepmerge = require( 'deepmerge' );
+const { isPlainObject } = require( 'is-plain-object' );
 const { po } = require( 'gettext-parser' );
-const { merge, isEmpty } = require( 'lodash' );
 const { relative, sep } = require( 'path' );
 const { writeFileSync } = require( 'fs' );
 
@@ -312,7 +313,10 @@ module.exports = () => {
 				},
 				exit( path, state ) {
 					const { filename } = this.file.opts;
-					if ( isEmpty( strings[ filename ] ) ) {
+					if (
+						! strings[ filename ] ||
+						! Object.values( strings[ filename ] ).length
+					) {
 						delete strings[ filename ];
 						return;
 					}
@@ -362,7 +366,13 @@ module.exports = () => {
 					}, {} );
 
 					// Merge translations from individual files into headers
-					const data = merge( {}, baseData, { translations } );
+					const data = deepmerge(
+						baseData,
+						{ translations },
+						{
+							isMergeableObject: isPlainObject,
+						}
+					);
 
 					// Ideally we could wait until Babel has finished parsing
 					// all files or at least asynchronously write, but the

packages/babel-plugin-makepot/package.json

@@ -28,8 +28,9 @@
 	],
 	"main": "index.js",
 	"dependencies": {
+		"deepmerge": "^4.3.0",
 		"gettext-parser": "^1.3.1",
-		"lodash": "^4.17.21"
+		"is-plain-object": "^5.0.0"
 	},
 	"peerDependencies": {
 		"@babel/core": "^7.12.9"