- transpiler now always returns an object

- emit transpiler metadata from evaluate / afterEval
- currently logging miniLocations from Repl.jsx

packages/core/evaluate.mjs

@@ -37,8 +37,12 @@ function safeEval(str, options = {}) {
 }
 
 export const evaluate = async (code, transpiler) => {
+  let meta = {};
   if (transpiler) {
-    code = transpiler(code); // transform syntactically correct js code to semantically usable code
+    // transform syntactically correct js code to semantically usable code
+    const transpiled = transpiler(code);
+    code = transpiled.output;
+    meta = transpiled;
   }
   // if no transpiler is given, we expect a single instruction (!wrapExpression)
   const options = { wrapExpression: !!transpiler };
@@ -48,5 +52,5 @@ export const evaluate = async (code, transpiler) => {
     const message = `got "${typeof evaluated}" instead of pattern`;
     throw new Error(message + (typeof evaluated === 'function' ? ', did you forget to call a function?' : '.'));
   }
-  return { mode: 'javascript', pattern: evaluated };
+  return { mode: 'javascript', pattern: evaluated, meta };
 };

packages/core/repl.mjs

@@ -35,11 +35,10 @@ export function repl({
     }
     try {
       await beforeEval?.({ code });
-      let { pattern } = await _evaluate(code, transpiler);
-
+      let { pattern, meta } = await _evaluate(code, transpiler);
       logger(`[eval] code updated`);
       setPattern(pattern, autostart);
-      afterEval?.({ code, pattern });
+      afterEval?.({ code, pattern, meta });
       return pattern;
     } catch (err) {
       // console.warn(`[repl] eval error: ${err.message}`);

packages/eval/shapeshifter.mjs

@@ -129,8 +129,8 @@ export default (_code) => {
   if (shouldAddReturn) {
     addReturn(shifted);
   }
-  const generated = undisguiseImports(codegen(shifted));
-  return generated;
+  const output = undisguiseImports(codegen(shifted));
+  return { output };
 };
 
 // renames all import statements to "_mport" as Shift doesn't support dynamic import.

packages/eval/test/shapeshifter.test.mjs

@@ -10,14 +10,16 @@ import shapeshifter, { wrappedAsync } from '../shapeshifter.mjs';
 describe('shapeshifter', () => {
   it('Should shift simple double quote string', () => {
     if (wrappedAsync) {
-      expect(shapeshifter('"c3"')).toEqual('(async()=>{return mini("c3").withMiniLocation([1,0,15],[1,4,19])})()');
+      expect(shapeshifter('"c3"').output).toEqual(
+        '(async()=>{return mini("c3").withMiniLocation([1,0,15],[1,4,19])})()',
+      );
     } else {
-      expect(shapeshifter('"c3"')).toEqual('return mini("c3").withMiniLocation([1,0,0],[1,4,4])');
+      expect(shapeshifter('"c3"').output).toEqual('return mini("c3").withMiniLocation([1,0,0],[1,4,4])');
     }
   });
   if (wrappedAsync) {
     it('Should handle dynamic imports', () => {
-      expect(shapeshifter('const { default: foo } = await import(\'https://bar.com/foo.js\');"c3"')).toEqual(
+      expect(shapeshifter('const { default: foo } = await import(\'https://bar.com/foo.js\');"c3"').output).toEqual(
         'const{default:foo}=await import("https://bar.com/foo.js");return mini("c3").withMiniLocation([1,64,79],[1,68,83])',
       );
     });

packages/transpiler/test/transpiler.test.mjs

@@ -11,22 +11,22 @@ const simple = { wrapAsync: false, addReturn: false, simpleLocs: true };
 
 describe('transpiler', () => {
   it('wraps double quote string with mini and adds location', () => {
-    expect(transpiler('"c3"', simple)).toEqual("mini('c3').withMiniLocation(0, 4);");
-    expect(transpiler('stack("c3","bd sd")', simple)).toEqual(
+    expect(transpiler('"c3"', simple).output).toEqual("mini('c3').withMiniLocation(0, 4);");
+    expect(transpiler('stack("c3","bd sd")', simple).output).toEqual(
       "stack(mini('c3').withMiniLocation(6, 10), mini('bd sd').withMiniLocation(11, 18));",
     );
   });
   it('wraps backtick string with mini and adds location', () => {
-    expect(transpiler('`c3`', simple)).toEqual("mini('c3').withMiniLocation(0, 4);");
+    expect(transpiler('`c3`', simple).output).toEqual("mini('c3').withMiniLocation(0, 4);");
   });
   it('replaces note variables with note strings', () => {
-    expect(transpiler('seq(c3, d3)', simple)).toEqual("seq('c3', 'd3');");
+    expect(transpiler('seq(c3, d3)', simple).output).toEqual("seq('c3', 'd3');");
   });
   it('keeps tagged template literal as is', () => {
-    expect(transpiler('xxx`c3`', simple)).toEqual('xxx`c3`;');
+    expect(transpiler('xxx`c3`', simple).output).toEqual('xxx`c3`;');
   });
   it('supports top level await', () => {
-    expect(transpiler("await samples('xxx');", simple)).toEqual("await samples('xxx');");
+    expect(transpiler("await samples('xxx');", simple).output).toEqual("await samples('xxx');");
   });
   /*   it('parses dynamic imports', () => {
     expect(

packages/transpiler/transpiler.mjs

@@ -5,7 +5,7 @@ import { isNoteWithOctave } from '@strudel.cycles/core';
 import { getLeafLocations } from '@strudel.cycles/mini';
 
 export function transpiler(input, options = {}) {
-  const { wrapAsync = false, addReturn = true, simpleLocs = false, emitMiniLocations = false } = options;
+  const { wrapAsync = false, addReturn = true, simpleLocs = false, emitMiniLocations = true } = options;
 
   let ast = parse(input, {
     ecmaVersion: 2022,
@@ -62,7 +62,7 @@ export function transpiler(input, options = {}) {
     output = `(async ()=>{${output}})()`;
   }
   if (!emitMiniLocations) {
-    return output;
+    return { output };
   }
   return { output, miniLocations };
 }

website/src/repl/Repl.jsx

@@ -128,7 +128,8 @@ export function Repl({ embedded = false }) {
         cleanupUi();
         cleanupDraw();
       },
-      afterEval: ({ code }) => {
+      afterEval: ({ code, meta }) => {
+        console.log('miniLocations', meta.miniLocations);
         setPending(false);
         setLatestCode(code);
         window.location.hash = '#' + encodeURIComponent(btoa(code));