build: group webpack & ignore dist & support yarn1.x (#2551)

.webpack/webpack.config.base.js

@@ -0,0 +1,54 @@
+import path from 'path';
+
+export const resolveRoot = (...relativePath) => path.resolve(__dirname, '..', ...relativePath);
+
+export default {
+  amd: false, // https://github.com/lodash/lodash/issues/3052
+  target: 'web',
+  entry: {
+    mermaid: './src/mermaid.js',
+  },
+  resolve: {
+    extensions: ['.wasm', '.mjs', '.js', '.json', '.jison'],
+    fallback: {
+      fs: false, // jison generated code requires 'fs'
+      path: require.resolve('path-browserify'),
+    },
+  },
+  output: {
+    path: resolveRoot('./dist'),
+    filename: '[name].js',
+    library: {
+      name: 'mermaid',
+      type: 'umd',
+      export: 'default',
+    },
+    globalObject: 'typeof self !== "undefined" ? self : this',
+  },
+  module: {
+    rules: [
+      {
+        test: /\.js$/,
+        include: [resolveRoot('./src'), resolveRoot('./node_modules/dagre-d3-renderer/lib')],
+        use: {
+          loader: 'babel-loader',
+        },
+      },
+      {
+        // load scss to string
+        test: /\.scss$/,
+        use: ['css-to-string-loader', 'css-loader', 'sass-loader'],
+      },
+      {
+        test: /\.jison$/,
+        use: {
+          loader: path.resolve(__dirname, './loaders/jison.js'),
+          options: {
+            'token-stack': true,
+          },
+        },
+      },
+    ],
+  },
+  devtool: 'source-map',
+};