refactor: change framework to esm / webpack / eslint

- remove grunt builds
  - breaking: remove production files from git

Also
- build: artifact `kindeditor.js` (no languages & plugins)
- perf: optimize npm package with only necessary files

.eslintignore

@@ -0,0 +1,6 @@
+/kindeditor*.js
+/dist
+/src/header.js
+/src/footer.js
+/lib
+/test

.eslintrc

@@ -0,0 +1,16 @@
+
+root: true
+
+parserOptions:
+    ecmaVersion: 2017
+    sourceType: module
+
+globals:
+    KindEditor: readonly
+
+env:
+    browser: true
+    node: true
+
+rules:
+    no-undef: error

.eslintrc-es3.yaml

@@ -0,0 +1,9 @@
+
+root: true
+
+parserOptions:
+    ecmaVersion: 3
+
+rules:
+    quote-props: [ error, 'as-needed', { keywords: true, unnecessary: false } ]
+    dot-notation: [ error, { allowKeywords: false, allowPattern: '.*' } ]

.gitignore

@@ -13,3 +13,6 @@ dist/
 node_modules/
 _build/
 attached/*
+
+/.idea
+/kindeditor*

.npmignore

@@ -0,0 +1,5 @@
+/*
+!/lang
+!/plugins
+!/themes
+!/kindeditor*.js

README.md

@@ -6,6 +6,13 @@ KindEditor is a lightweight, Open Source(LGPL), cross browser, web based WYSIWYG
 
 http://kindeditor.net/
 
+## Compatibility
+
+- IE6 compatible for `kindeditor-all.js` & `kindeditor-all-min.js`
+- IE8 compatible for `kindeditor.js`
+
+  if using IE6 or IE7, you need to polyfill `JSON.parse` before `kindeditor.js` load  
+
 ## Contributors
 
 * Timon Lin

build.js

@@ -0,0 +1,110 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+const child_process = require('child_process');
+const AdmZip = require('adm-zip');
+const pkg = require('./package.json');
+const today = new Date().toISOString().replace(/T.*/, ''); // yyyy-mm-dd
+
+const lang = 'zh-CN';
+
+// noinspection HttpUrlsUsage
+const BANNER = `/* ${pkg.name} ${pkg.version} (${today}), Copyright (C) kindeditor.net, Licence: http://kindeditor.net/license.php */\n`;
+
+// noinspection SpellCheckingInspection
+const PLUGIN_FILES = [
+    'plugins/ajax.js',
+    `lang/${lang}.js`,
+    'plugins/anchor/anchor.js',
+    'plugins/autoheight/autoheight.js',
+    'plugins/baidumap/baidumap.js',
+    'plugins/map/map.js',
+    'plugins/clearhtml/clearhtml.js',
+    'plugins/code/code.js',
+    'plugins/emoticons/emoticons.js',
+    'plugins/filemanager/filemanager.js',
+    'plugins/flash/flash.js',
+    'plugins/image/image.js',
+    'plugins/insertfile/insertfile.js',
+    'plugins/lineheight/lineheight.js',
+    'plugins/link/link.js',
+    'plugins/media/media.js',
+    'plugins/multiimage/multiimage.js',
+    'plugins/pagebreak/pagebreak.js',
+    'plugins/plainpaste/plainpaste.js',
+    'plugins/preview/preview.js',
+    'plugins/quickformat/quickformat.js',
+    'plugins/table/table.js',
+    'plugins/template/template.js',
+    'plugins/wordpaste/wordpaste.js',
+    'plugins/fixtoolbar/fixtoolbar.js',
+];
+
+const concat = (...plugins) => ['src/header.js', 'dist/main.js', ...plugins, 'src/footer.js']
+    .map(file => fs.readFileSync(file, 'utf8').replace(/\r/g, ''))
+    // remove webpack generated codes
+    .map((src, index) => index !== 1 ? src : src.replace(RegExp(('^'
+        + '/******/ (function() { // webpackBootstrap\n'
+        + '/******/ \t"use strict";\n'
+        + 'var __webpack_exports__ = {};\n'
+        + '%' // place holder for body
+        + '/******/ })()\n;'
+        + '$').replace(/[*(){}]/g, '\\$&').replace('%', '([\\s\\S]*)')), '$1')
+    ).join('\n')
+    .replace(/\${VERSION}/g, `${pkg.version} (${today})`) // yyyy-mm-dd
+    .replace(/\${THISYEAR}/g, today.replace(/-.*/, '')) // yyyy
+    .replace(/([\s\S])\/\*[\s\S]*?\*\//g, '$1') // remove block comments except header
+    .replace(/(^;?|\s)\/\/.*$/mg, '')           // remove line comments
+    .replace(/\s+$/mg, '')                      // remove trailing white spaces
+    .replace(/\n+/g, '\n')                      // merge multiple blank lines to one
+;
+
+const fsize = /* Stats | string */x => `${x.size || Buffer.from(x, 'utf8').length}`.replace(/\d(?=(\d{3})+$)/g, '$&,');
+const generate = (outputFilename, content, ie6) => {
+    if (ie6) {
+        content = content.replace(/,\s*json\s*:\s*JSON\.parse\b/, ''); // remove K.json initial for IE6 compatible
+        console.log(`  - ${outputFilename} ${fsize(content)} (ie6 enabled)`);
+    } else {
+        console.log(`  - ${outputFilename} ${fsize(content)}`);
+    }
+    fs.writeFileSync(outputFilename, content, 'utf8');
+    if (content.match(/webpack|CONCATENATED|harmony/)) {
+        console.log('    ERR: webpack generated code still not striped');
+        process.exit(1);
+    }
+    if (ie6 && content.match(/JSON\.parse/)) {
+        console.log('    ERR: global JSON is not IE6 compatible');
+        process.exit(1);
+    }
+    try {
+        child_process.execSync('npm exec eslint -- '
+            + `--color --no-ignore --no-eslintrc -c .eslintrc-es3.yaml ${outputFilename}`, {stdio : 'inherit'});
+    } catch (e) {
+        process.exit(1);
+    }
+};
+
+(async () => {
+    child_process.execSync('npm exec webpack', {stdio : 'inherit'});
+
+    console.log();
+    console.log('generating artifacts');
+    generate('kindeditor.js', concat());
+    generate('kindeditor-all.js', concat(...PLUGIN_FILES), true);
+
+    const minify = async file => (await require('terser').minify(fs.readFileSync(file, 'utf8'), {
+        ie8 : true, format : {comments : false},
+    })).code;
+    // generate('kindeditor-min.js', BANNER + (await minify('kindeditor.js')));
+    generate('kindeditor-all-min.js', BANNER + (await minify('kindeditor-all.js')), true);
+
+    const zipFileName = `dist/${pkg.filename}-${pkg.version}-${lang}.zip`;
+    const zip = new AdmZip(null, {});
+    fs.readdirSync('.', 'utf8').filter(name => /^(asp(\.net)?|jsp|lang|php|plugins|themes)$/.test(name))
+        .forEach(name => zip.addLocalFolder(name, `kindeditor/${name}/`));
+    fs.readdirSync('.', 'utf8').filter(name => /^(kindeditor.*\.js|license\.txt)$/.test(name))
+        .forEach(name => zip.addLocalFile(name, 'kindeditor/'));
+    zip.writeZip(zipFileName, () => {
+        console.log(`  - ${zipFileName} ${fsize(fs.statSync(zipFileName))}`);
+    });
+})();