Move webpack cache to data root

docker/build-lib.js

@@ -1,4 +1,4 @@
 import getWebpackServeMiddleware from '../src/middleware/webpack-serve.js';
 
 const middleware = getWebpackServeMiddleware();
-await middleware.runWebpackCompiler();
+await middleware.runWebpackCompiler(true);

package-lock.json

@@ -43,6 +43,7 @@
                 "ip-matching": "^2.1.2",
                 "ip-regex": "^5.0.0",
                 "ipaddr.js": "^2.0.1",
+                "is-docker": "^3.0.0",
                 "jimp": "^0.22.10",
                 "localforage": "^1.10.0",
                 "lodash": "^4.17.21",
@@ -4649,15 +4650,15 @@
             "license": "MIT"
         },
         "node_modules/is-docker": {
-            "version": "2.2.1",
+            "version": "3.0.0",
-            "resolved": "https://registry.npmjs.org/is-docker/-/is-docker-2.2.1.tgz",
+            "resolved": "https://registry.npmjs.org/is-docker/-/is-docker-3.0.0.tgz",
-            "integrity": "sha512-F+i2BKsFrH66iaUFc0woD8sLy8getkwTwtOBjvs56Cx4CgJDeKQeqfz8wAYiSb8JOprWhHH5p77PbmYCvvUuXQ==",
+            "integrity": "sha512-eljcgEDlEns/7AXFosB5K/2nCM4P7FQPkGc/DWLy5rmFEWvZayGrik1d9/QIY5nJ4f9YsVvBkA6kJpHn9rISdQ==",
             "license": "MIT",
             "bin": {
                 "is-docker": "cli.js"
             },
             "engines": {
-                "node": ">=8"
+                "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
             },
             "funding": {
                 "url": "https://github.com/sponsors/sindresorhus"
@@ -4734,6 +4735,21 @@
                 "node": ">=8"
             }
         },
+        "node_modules/is-wsl/node_modules/is-docker": {
+            "version": "2.2.1",
+            "resolved": "https://registry.npmjs.org/is-docker/-/is-docker-2.2.1.tgz",
+            "integrity": "sha512-F+i2BKsFrH66iaUFc0woD8sLy8getkwTwtOBjvs56Cx4CgJDeKQeqfz8wAYiSb8JOprWhHH5p77PbmYCvvUuXQ==",
+            "license": "MIT",
+            "bin": {
+                "is-docker": "cli.js"
+            },
+            "engines": {
+                "node": ">=8"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
         "node_modules/isarray": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
@@ -5518,6 +5534,21 @@
                 "url": "https://github.com/sponsors/sindresorhus"
             }
         },
+        "node_modules/open/node_modules/is-docker": {
+            "version": "2.2.1",
+            "resolved": "https://registry.npmjs.org/is-docker/-/is-docker-2.2.1.tgz",
+            "integrity": "sha512-F+i2BKsFrH66iaUFc0woD8sLy8getkwTwtOBjvs56Cx4CgJDeKQeqfz8wAYiSb8JOprWhHH5p77PbmYCvvUuXQ==",
+            "license": "MIT",
+            "bin": {
+                "is-docker": "cli.js"
+            },
+            "engines": {
+                "node": ">=8"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
         "node_modules/openai": {
             "version": "4.17.4",
             "resolved": "https://registry.npmjs.org/openai/-/openai-4.17.4.tgz",

package.json

@@ -33,6 +33,7 @@
         "ip-matching": "^2.1.2",
         "ip-regex": "^5.0.0",
         "ipaddr.js": "^2.0.1",
+        "is-docker": "^3.0.0",
         "jimp": "^0.22.10",
         "localforage": "^1.10.0",
         "lodash": "^4.17.21",

src/middleware/webpack-serve.js

@@ -1,11 +1,8 @@
 import path from 'node:path';
 import webpack from 'webpack';
-import { publicLibConfig } from '../../webpack.config.js';
+import getPublicLibConfig from '../../webpack.config.js';
 
 export default function getWebpackServeMiddleware() {
-    const outputPath = publicLibConfig.output?.path;
-    const outputFile = publicLibConfig.output?.filename;
-
     /**
      * A very spartan recreation of webpack-dev-middleware.
      * @param {import('express').Request} req Request object.
@@ -14,6 +11,10 @@ export default function getWebpackServeMiddleware() {
      * @type {import('express').RequestHandler}
      */
     function devMiddleware(req, res, next) {
+        const publicLibConfig = getPublicLibConfig();
+        const outputPath = publicLibConfig.output?.path;
+        const outputFile = publicLibConfig.output?.filename;
+
         if (req.method === 'GET' && path.parse(req.path).base === outputFile) {
             return res.sendFile(outputFile, { root: outputPath });
         }
@@ -23,9 +24,11 @@ export default function getWebpackServeMiddleware() {
 
     /**
      * Wait until Webpack is done compiling.
+     * @param {boolean} [forceDist=false] Whether to force the use the /dist folder.
      * @returns {Promise<void>}
      */
-    devMiddleware.runWebpackCompiler = () => {
+    devMiddleware.runWebpackCompiler = (forceDist = false) => {
+        const publicLibConfig = getPublicLibConfig(forceDist);
         const compiler = webpack(publicLibConfig);
 
         return new Promise((resolve) => {

webpack.config.js

@@ -1,35 +1,59 @@
 import process from 'node:process';
 import path from 'node:path';
+import os from 'node:os';
+import isDocker from 'is-docker';
 
-/** @type {import('webpack').Configuration} */
+/**
-export const publicLibConfig = {
+ * Get the Webpack configuration for the public/lib.js file.
-    mode: 'production',
+ * @param {boolean} forceDist Whether to force the use the /dist folder.
-    entry: './public/lib.js',
+ * @returns {import('webpack').Configuration}
-    cache: {
+ * */
-        type: 'filesystem',
+export default function getPublicLibConfig(forceDist = false) {
-        cacheDirectory: path.resolve(process.cwd(), 'dist/webpack'),
+    function getCacheDirectory() {
-        store: 'pack',
+        // Docker got cache pre-baked into the image.
-        compression: 'gzip',
+        if (forceDist || isDocker()) {
-    },
+            return path.resolve(process.cwd(), 'dist/webpack');
-    devtool: false,
+        }
-    watch: false,
+
-    module: {},
+        // Data root is set (should be the case 99.99% of the time).
-    stats: {
+        if (typeof globalThis.DATA_ROOT === 'string') {
-        preset: 'minimal',
+            return path.resolve(globalThis.DATA_ROOT, '_cache', 'webpack');
-        assets: false,
+        }
-        modules: false,
+
-        colors: true,
+        // Fallback to the system temp directory.
-        timings: true,
+        return path.resolve(os.tmpdir(), 'webpack');
-    },
+    }
-    experiments: {
+
-        outputModule: true,
+    const cacheDirectory = getCacheDirectory();
-    },
+    return {
-    performance: {
+        mode: 'production',
-        hints: false,
+        entry: './public/lib.js',
-    },
+        cache: {
-    output: {
+            type: 'filesystem',
-        path: path.resolve(process.cwd(), 'dist'),
+            cacheDirectory: cacheDirectory,
-        filename: 'lib.js',
+            store: 'pack',
-        libraryTarget: 'module',
+            compression: 'gzip',
-    },
+        },
-};
+        devtool: false,
+        watch: false,
+        module: {},
+        stats: {
+            preset: 'minimal',
+            assets: false,
+            modules: false,
+            colors: true,
+            timings: true,
+        },
+        experiments: {
+            outputModule: true,
+        },
+        performance: {
+            hints: false,
+        },
+        output: {
+            path: path.resolve(process.cwd(), 'dist'),
+            filename: 'lib.js',
+            libraryTarget: 'module',
+        },
+    };
+}