tweak some config etc

easing.mjs

@@ -3,6 +3,8 @@ Adapted from https://github.com/mattdesl
 Distributed under MIT License https://github.com/mattdesl/eases/blob/master/LICENSE.md
 */
 
+import { identity as linear } from 'svelte/internal';
+
 export function backInOut(t) {
 	var s = 1.70158 * 1.525;
 	if ((t *= 2) < 1) return 0.5 * (t * t * ((s + 1) * t - s));
@@ -112,10 +114,6 @@ export function expoOut(t) {
 	return t === 1.0 ? t : 1.0 - Math.pow(2.0, -10.0 * t);
 }
 
-export function linear(t) {
-	return t;
-}
-
 export function quadInOut(t) {
 	t /= 0.5;
 	if (t < 1) return 0.5 * t * t;

rollup.config.js

@@ -52,45 +52,31 @@ export default [
 		experimentalCodeSplitting: true
 	},
 
-	/* internal.[m]js */
+	/* internal.[m]js, motion.mjs */
-	{
+	...['internal', 'motion'].map(name => ({
-		input: 'src/internal/index.js',
+		input: `src/${name}/index.js`,
 		output: [
 			{
-				file: 'internal.mjs',
+				file: `${name}.mjs`,
-				format: 'esm'
-			},
-			{
-				file: 'internal.js',
-				format: 'cjs'
-			}
-		]
-	},
-
-	/* motion.[m]js */
-	{
-		input: 'src/motion/index.js',
-		output: [
-			{
-				file: 'motion.mjs',
 				format: 'esm',
-				paths: id => id.replace('svelte', '.')
+				paths: id => id.startsWith('svelte/') && id.replace('svelte', '.')
 			},
 			{
-				file: 'motion.js',
+				file: `${name}.js`,
 				format: 'cjs',
-				paths: id => id.replace('svelte', '.')
+				paths: id => id.startsWith('svelte/') && id.replace('svelte', '.')
 			}
 		],
 		external: id => id.startsWith('svelte/')
-	},
+	})),
 
-	// runtime API
+	// everything else
-	...['index', 'store', 'easing', 'motion', 'transition'].map(name => ({
+	...['index', 'store', 'easing', 'transition'].map(name => ({
 		input: `${name}.mjs`,
 		output: {
 			file: `${name}.js`,
-			format: 'cjs'
+			format: 'cjs',
+			paths: id => id.startsWith('svelte/') && id.replace('svelte', '.')
 		},
 		external: id => id !== `${name}.mjs`
 	}))