chore: Dedupe webpack configs. (#5449)

* chore: Dedupe package dependencies and webpack configs.

* Fully dedupe `src/packages` via symlinks

* Merge https://github.com/excalidraw/excalidraw into dedupe-package-deps-configs

* fix: Link `tsc` so `build:example` works in @excalidraw/excalidraw

* @excalidraw/plugins: Revert the `yarn.lock` deduping.

* Drop yarn commands from the root `package.json`.

* Remove more unneeded `package.json` additions.

* One more change to drop in `package.json` files.

* Deduping: Move even more into common webpack configs.

* renaming

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

src/packages/common.webpack.dev.config.js

@@ -0,0 +1,88 @@
+const path = require("path");
+const autoprefixer = require("autoprefixer");
+const webpack = require("webpack");
+const { parseEnvVariables } = require(path.resolve(global.__childdir, "./env"));
+
+module.exports = {
+  mode: "development",
+  devtool: false,
+  output: {
+    libraryTarget: "umd",
+    filename: "[name].js",
+    publicPath: "",
+  },
+  resolve: {
+    extensions: [".js", ".ts", ".tsx", ".css", ".scss"],
+  },
+  module: {
+    rules: [
+      {
+        test: /\.(sa|sc|c)ss$/,
+        exclude: /node_modules/,
+        use: [
+          "style-loader",
+          { loader: "css-loader" },
+          {
+            loader: "postcss-loader",
+            options: {
+              postcssOptions: {
+                plugins: [autoprefixer()],
+              },
+            },
+          },
+          "sass-loader",
+        ],
+      },
+      {
+        test: /\.(ts|tsx|js|jsx|mjs)$/,
+        exclude: /node_modules\/(?!browser-fs-access)/,
+        use: [
+          {
+            loader: "ts-loader",
+            options: {
+              transpileOnly: true,
+              configFile: path.resolve(__dirname, "./tsconfig.dev.json"),
+            },
+          },
+        ],
+      },
+      {
+        test: /\.(woff|woff2|eot|ttf|otf)$/,
+        type: "asset/resource",
+      },
+    ],
+  },
+  optimization: {
+    splitChunks: {
+      chunks: "async",
+      cacheGroups: {
+        vendors: {
+          test: /[\\/]node_modules[\\/]/,
+          name: "vendor",
+        },
+      },
+    },
+  },
+  plugins: [
+    new webpack.EvalSourceMapDevToolPlugin({ exclude: /vendor/ }),
+    new webpack.DefinePlugin({
+      "process.env": parseEnvVariables(
+        path.resolve(__dirname, "../../.env.development"),
+      ),
+    }),
+  ],
+  externals: {
+    react: {
+      root: "React",
+      commonjs2: "react",
+      commonjs: "react",
+      amd: "react",
+    },
+    "react-dom": {
+      root: "ReactDOM",
+      commonjs2: "react-dom",
+      commonjs: "react-dom",
+      amd: "react-dom",
+    },
+  },
+};

src/packages/common.webpack.prod.config.js

@@ -0,0 +1,119 @@
+const path = require("path");
+const autoprefixer = require("autoprefixer");
+const webpack = require("webpack");
+const BundleAnalyzerPlugin = require(path.resolve(
+  path.join(global.__childdir, "node_modules"),
+  "webpack-bundle-analyzer",
+)).BundleAnalyzerPlugin;
+const TerserPlugin = require("terser-webpack-plugin");
+const { parseEnvVariables } =
+  "__noenv" in global ? {} : require(path.resolve(global.__childdir, "./env"));
+
+module.exports = {
+  mode: "production",
+  output: {
+    libraryTarget: "umd",
+    filename: "[name].js",
+    publicPath: "",
+  },
+  resolve: {
+    extensions: [".js", ".ts", ".tsx", ".css", ".scss"],
+  },
+  module: {
+    rules: [
+      {
+        test: /\.(sa|sc|c)ss$/,
+        exclude: /node_modules/,
+        use: [
+          "style-loader",
+          {
+            loader: "css-loader",
+          },
+          {
+            loader: "postcss-loader",
+            options: {
+              postcssOptions: {
+                plugins: [autoprefixer()],
+              },
+            },
+          },
+          "sass-loader",
+        ],
+      },
+      {
+        test: /\.(ts|tsx|js|jsx|mjs)$/,
+        exclude: /node_modules\/(?!browser-fs-access)/,
+        use: [
+          {
+            loader: "ts-loader",
+            options: {
+              transpileOnly: true,
+              configFile: path.resolve(__dirname, "./tsconfig.prod.json"),
+            },
+          },
+          {
+            loader: "babel-loader",
+            options: {
+              presets: [
+                "@babel/preset-env",
+                ["@babel/preset-react", { runtime: "automatic" }],
+                "@babel/preset-typescript",
+              ],
+              plugins: [
+                "transform-class-properties",
+                "@babel/plugin-transform-runtime",
+              ],
+            },
+          },
+        ],
+      },
+      {
+        test: /\.(woff|woff2|eot|ttf|otf)$/,
+        type: "asset/resource",
+      },
+    ],
+  },
+  optimization: {
+    minimize: true,
+    minimizer: [
+      new TerserPlugin({
+        test: /\.js($|\?)/i,
+      }),
+    ],
+    splitChunks: {
+      chunks: "async",
+      cacheGroups: {
+        vendors: {
+          test: /[\\/]node_modules[\\/]/,
+          name: "vendor",
+        },
+      },
+    },
+  },
+  plugins: [
+    ...(process.env.ANALYZER === "true" ? [new BundleAnalyzerPlugin()] : []),
+    ...("__noenv" in global
+      ? []
+      : [
+          new webpack.DefinePlugin({
+            "process.env": parseEnvVariables(
+              path.resolve(__dirname, "../../.env.production"),
+            ),
+          }),
+        ]),
+  ],
+  externals: {
+    react: {
+      root: "React",
+      commonjs2: "react",
+      commonjs: "react",
+      amd: "react",
+    },
+    "react-dom": {
+      root: "ReactDOM",
+      commonjs2: "react-dom",
+      commonjs: "react-dom",
+      amd: "react-dom",
+    },
+  },
+};

src/packages/excalidraw/webpack.dev.config.js

@@ -1,97 +1,18 @@
+global.__childdir = __dirname;
 const path = require("path");
-const webpack = require("webpack");
-const autoprefixer = require("autoprefixer");
-const { parseEnvVariables } = require("./env");
+const { merge } = require("webpack-merge");
+const commonConfig = require("../common.webpack.dev.config");
 
 const outputDir = process.env.EXAMPLE === "true" ? "example/public" : "dist";
-module.exports = {
-  mode: "development",
-  devtool: false,
+const config = {
   entry: {
     "excalidraw.development": "./entry.js",
   },
   output: {
     path: path.resolve(__dirname, outputDir),
     library: "ExcalidrawLib",
-    libraryTarget: "umd",
-    filename: "[name].js",
     chunkFilename: "excalidraw-assets-dev/[name]-[contenthash].js",
     assetModuleFilename: "excalidraw-assets-dev/[name][ext]",
-
-    publicPath: "",
-  },
-  resolve: {
-    extensions: [".js", ".ts", ".tsx", ".css", ".scss"],
-  },
-  module: {
-    rules: [
-      {
-        test: /\.(sa|sc|c)ss$/,
-        exclude: /node_modules/,
-        use: [
-          "style-loader",
-          { loader: "css-loader" },
-          {
-            loader: "postcss-loader",
-            options: {
-              postcssOptions: {
-                plugins: [autoprefixer()],
-              },
-            },
-          },
-          "sass-loader",
-        ],
-      },
-      {
-        test: /\.(ts|tsx|js|jsx|mjs)$/,
-        exclude: /node_modules\/(?!browser-fs-access)/,
-        use: [
-          {
-            loader: "ts-loader",
-            options: {
-              transpileOnly: true,
-              configFile: path.resolve(__dirname, "../tsconfig.dev.json"),
-            },
-          },
-        ],
-      },
-      {
-        test: /\.(woff|woff2|eot|ttf|otf)$/,
-        type: "asset/resource",
-      },
-    ],
-  },
-  optimization: {
-    splitChunks: {
-      chunks: "async",
-      cacheGroups: {
-        vendors: {
-          test: /[\\/]node_modules[\\/]/,
-          name: "vendor",
-        },
-      },
-    },
-  },
-  plugins: [
-    new webpack.EvalSourceMapDevToolPlugin({ exclude: /vendor/ }),
-    new webpack.DefinePlugin({
-      "process.env": parseEnvVariables(
-        path.resolve(__dirname, "../../../.env.development"),
-      ),
-    }),
-  ],
-  externals: {
-    react: {
-      root: "React",
-      commonjs2: "react",
-      commonjs: "react",
-      amd: "react",
-    },
-    "react-dom": {
-      root: "ReactDOM",
-      commonjs2: "react-dom",
-      commonjs: "react-dom",
-      amd: "react-dom",
-    },
   },
 };
+module.exports = merge(commonConfig, config);

src/packages/excalidraw/webpack.prod.config.js

@@ -1,119 +1,17 @@
+global.__childdir = __dirname;
 const path = require("path");
-const TerserPlugin = require("terser-webpack-plugin");
-const BundleAnalyzerPlugin =
-  require("webpack-bundle-analyzer").BundleAnalyzerPlugin;
-const autoprefixer = require("autoprefixer");
-const webpack = require("webpack");
-const { parseEnvVariables } = require("./env");
+const { merge } = require("webpack-merge");
+const commonConfig = require("../common.webpack.prod.config");
 
-module.exports = {
-  mode: "production",
+const config = {
   entry: {
     "excalidraw.production.min": "./entry.js",
   },
   output: {
     path: path.resolve(__dirname, "dist"),
     library: "ExcalidrawLib",
-    libraryTarget: "umd",
-    filename: "[name].js",
     chunkFilename: "excalidraw-assets/[name]-[contenthash].js",
     assetModuleFilename: "excalidraw-assets/[name][ext]",
-    publicPath: "",
-  },
-  resolve: {
-    extensions: [".js", ".ts", ".tsx", ".css", ".scss"],
-  },
-  module: {
-    rules: [
-      {
-        test: /\.(sa|sc|c)ss$/,
-        exclude: /node_modules/,
-        use: [
-          "style-loader",
-          {
-            loader: "css-loader",
-          },
-          {
-            loader: "postcss-loader",
-            options: {
-              postcssOptions: {
-                plugins: [autoprefixer()],
-              },
-            },
-          },
-          "sass-loader",
-        ],
-      },
-      {
-        test: /\.(ts|tsx|js|jsx|mjs)$/,
-        exclude: /node_modules\/(?!browser-fs-access)/,
-        use: [
-          {
-            loader: "ts-loader",
-            options: {
-              transpileOnly: true,
-              configFile: path.resolve(__dirname, "../tsconfig.prod.json"),
-            },
-          },
-          {
-            loader: "babel-loader",
-            options: {
-              presets: [
-                "@babel/preset-env",
-                ["@babel/preset-react", { runtime: "automatic" }],
-                "@babel/preset-typescript",
-              ],
-              plugins: [
-                "transform-class-properties",
-                "@babel/plugin-transform-runtime",
-              ],
-            },
-          },
-        ],
-      },
-      {
-        test: /\.(woff|woff2|eot|ttf|otf)$/,
-        type: "asset/resource",
-      },
-    ],
-  },
-  optimization: {
-    minimize: true,
-    minimizer: [
-      new TerserPlugin({
-        test: /\.js($|\?)/i,
-      }),
-    ],
-    splitChunks: {
-      chunks: "async",
-      cacheGroups: {
-        vendors: {
-          test: /[\\/]node_modules[\\/]/,
-          name: "vendor",
-        },
-      },
-    },
-  },
-  plugins: [
-    ...(process.env.ANALYZER === "true" ? [new BundleAnalyzerPlugin()] : []),
-    new webpack.DefinePlugin({
-      "process.env": parseEnvVariables(
-        path.resolve(__dirname, "../../../.env.production"),
-      ),
-    }),
-  ],
-  externals: {
-    react: {
-      root: "React",
-      commonjs2: "react",
-      commonjs: "react",
-      amd: "react",
-    },
-    "react-dom": {
-      root: "ReactDOM",
-      commonjs2: "react-dom",
-      commonjs: "react-dom",
-      amd: "react-dom",
-    },
   },
 };
+module.exports = merge(commonConfig, config);

src/packages/utils/webpack.prod.config.js

@@ -1,60 +1,23 @@
+global.__childdir = __dirname;
+global.__noenv = true;
 const webpack = require("webpack");
 const path = require("path");
-const BundleAnalyzerPlugin =
-  require("webpack-bundle-analyzer").BundleAnalyzerPlugin;
+const { merge } = require("webpack-merge");
+const commonConfig = require("../common.webpack.prod.config");
 
-module.exports = {
-  mode: "production",
+const config = {
   entry: { "excalidraw-utils.min": "./index.js" },
   output: {
     path: path.resolve(__dirname, "dist"),
-    filename: "[name].js",
     library: "ExcalidrawUtils",
-    libraryTarget: "umd",
-  },
-  resolve: {
-    extensions: [".tsx", ".ts", ".js", ".css", ".scss"],
   },
   optimization: {
     runtimeChunk: false,
   },
-  module: {
-    rules: [
-      {
-        test: /\.(sa|sc|c)ss$/,
-        exclude: /node_modules/,
-        use: ["style-loader", { loader: "css-loader" }, "sass-loader"],
-      },
-      {
-        test: /\.(ts|tsx|js)$/,
-        use: [
-          {
-            loader: "ts-loader",
-            options: {
-              transpileOnly: true,
-              configFile: path.resolve(__dirname, "../tsconfig.prod.json"),
-            },
-          },
-          {
-            loader: "babel-loader",
-
-            options: {
-              presets: [
-                "@babel/preset-env",
-                ["@babel/preset-react", { runtime: "automatic" }],
-                "@babel/preset-typescript",
-              ],
-              plugins: [["@babel/plugin-transform-runtime"]],
-            },
-          },
-        ],
-      },
-    ],
-  },
   plugins: [
     new webpack.optimize.LimitChunkCountPlugin({
       maxChunks: 1,
     }),
-    ...(process.env.ANALYZER === "true" ? [new BundleAnalyzerPlugin()] : []),
   ],
 };
+module.exports = merge(commonConfig, config);