chore: use banner and footer to wrap code

build/dev-fast.js

@@ -20,7 +20,6 @@
 
 const path = require('path');
 const {build} = require('esbuild');
-const fs = require('fs');
 
 const outFilePath = path.resolve(__dirname, '../dist/echarts.js');
 
@@ -28,6 +27,7 @@ const umdMark = '// ------------- WRAPPED UMD --------------- //';
 const umdWrapperHead = `
 ${umdMark}
 (function (root, factory) {
+    window.__DEV__ = true;
     if (typeof define === 'function' && define.amd) {
         // AMD. Register as an anonymous module.
         define(['exports'], factory);
@@ -44,46 +44,23 @@ ${umdMark}
 const umdWrapperTail = `
 }));`;
 
-async function wrapUMDCode() {
-    const code = fs.readFileSync(outFilePath, 'utf-8');
-    if (code.indexOf(umdMark) >= 0) {
-        return;
-    }
-
-    fs.writeFileSync(
-        outFilePath,
-        // Replaced __DEV__ with a same length string to avoid breaking source map
-        umdWrapperHead + code.replace(/__DEV__/g, "\'_DEV_\'") + umdWrapperTail,
-        'utf-8'
-    );
-
-    const sourceMap = JSON.parse(fs.readFileSync(outFilePath + '.map', 'utf-8'));
-    // Fast trick for fixing source map
-    sourceMap.mappings = umdWrapperHead.split('\n').map(() => '').join(';') + sourceMap.mappings;
-
-    fs.writeFileSync(outFilePath + '.map', JSON.stringify(sourceMap), 'utf-8');
-}
-
 build({
-    // stdio: 'inherit',
     entryPoints: [path.resolve(__dirname, '../src/echarts.all.ts')],
     outfile: outFilePath,
     format: 'cjs',
     sourcemap: true,
     bundle: true,
+    banner: umdWrapperHead,
+    footer: umdWrapperTail,
     watch: {
-        async onRebuild(error, result) {
+        async onRebuild(error) {
             if (error) {
                 console.error('watch build failed:', error)
             } else {
-                console.time('Wrap UMD');
-                await wrapUMDCode();
-                console.timeEnd('Wrap UMD');
+                console.log('build done')
             }
         },
     },
-}).then(async (result) => {
-    console.time('Wrap UMD');
-    await wrapUMDCode();
-    console.timeEnd('Wrap UMD');
+}).then(async () => {
+    console.log('build done')
 }).catch(e => console.error(e.toString()))