fix: Fix source maps (#818)

* Fix missing source map register if the v8 cache enabled
* Fix missing source maps in assets if the v8 cache disabled

Co-authored-by: yuriipalii <yurii.palii@ekreative.com>
Co-authored-by: Steven <steven@ceriously.com>

src/index.js

@@ -490,25 +490,25 @@ function ncc (
         // custom terser phase used over Webpack integration for this reason
         if (!result || result.code === undefined)
           throw null;
-        
+
         ({ code, map } = {
           code: result.code,
           map: map ? JSON.parse(result.map) : undefined
         });
       }
       catch (e) {
-        console.log('An error occurred while minifying. The result will not be minified.'); 
+        console.log('An error occurred while minifying. The result will not be minified.');
       }
     }
 
+    if (map) {
+      assets[`${filename}.map`] = { source: JSON.stringify(map), permissions: defaultPermissions };
+    }
+
     if (v8cache) {
       const { Script } = require('vm');
       assets[`${filename}.cache`] = { source: new Script(code).createCachedData(), permissions: defaultPermissions };
       assets[`${filename}.cache${ext}`] = { source: code, permissions: defaultPermissions };
-      if (map) {
-        assets[filename + '.map'] = { source: JSON.stringify(map), permissions: defaultPermissions };
-        map = undefined;
-      }
       const columnOffset = -'(function (exports, require, module, __filename, __dirname) { '.length;
       code =
         `const { readFileSync, writeFileSync } = require('fs'), { Script } = require('vm'), { wrap } = require('module');\n` +

test/unit.test.js

@@ -51,6 +51,13 @@ for (const unitTest of fs.readdirSync(`${__dirname}/unit`)) {
           expect(assets['pi-bridge.js']).toBeDefined();
           expect(assets['pi-bridge.js'].source.toString()).toContain('Math.PI');
         }
+        if (unitTest.includes('sourcemap-register')) {
+          expect(assets['sourcemap-register.js']).toBeDefined()
+          expect(assets['sourcemap-register.js'].source.toString()).toEqual(fs.readFileSync(__dirname + '/../src/sourcemap-register.js.cache.js').toString())
+        }
+        if (unitTest.includes('minify') && !unitTest.includes('minify-err')) {
+          expect(assets['index.js.map']).toBeDefined()
+        }
         const actual = code
           .trim()
           // Windows support

test/unit/minify-sourcemap-register/input.js

@@ -0,0 +1,3 @@
+const foobar = 'qux'
+console.log?.("hello");
+exports.foobar = foobar

test/unit/minify-sourcemap-register/opt.json

@@ -0,0 +1,5 @@
+{
+  "minify": true,
+  "sourceMap": true,
+  "sourceMapRegister": true
+}

test/unit/minify-v8cache-sourcemap-register/input.js

@@ -0,0 +1,3 @@
+const foobar = 'qux'
+console.log("hello");
+exports.foobar = foobar

test/unit/minify-v8cache-sourcemap-register/opt.json

@@ -0,0 +1,6 @@
+{
+  "minify": true,
+  "sourceMap": true,
+  "sourceMapRegister": true,
+  "v8cache": true
+}

test/unit/minify-v8cache-sourcemap-register/output.js

@@ -0,0 +1,8 @@
+require('./sourcemap-register.js');const { readFileSync, writeFileSync } = require('fs'), { Script } = require('vm'), { wrap } = require('module');
+const basename = __dirname + '/index.js';
+const source = readFileSync(basename + '.cache.js', 'utf-8');
+const cachedData = !process.pkg && require('process').platform !== 'win32' && readFileSync(basename + '.cache');
+const scriptOpts = { filename: basename + '.cache.js', columnOffset: -62 }
+const script = new Script(wrap(source), cachedData ? Object.assign({ cachedData }, scriptOpts) : scriptOpts);
+(script.runInThisContext())(exports, require, module, __filename, __dirname);
+if (cachedData) process.on('exit', () => { try { writeFileSync(basename + '.cache', script.createCachedData()); } catch(e) {} });