Move the MRT reference app to the SDKs, so that we can verify eg. Node support

packages/pwa-kit-create-app/scripts/build.js

@@ -24,7 +24,8 @@ const main = () => {
     const pkgNames = [
         'template-retail-react-app',
         'template-express-minimal',
-        'template-typescript-minimal'
+        'template-typescript-minimal',
+        'template-mrt-reference-app'
     ]
 
     if (!sh.test('-d', templatesDir)) {

packages/pwa-kit-create-app/scripts/create-mobify-app.js

@@ -60,11 +60,13 @@ const EXPRESS_MINIMAL = 'express-minimal'
 const TEST_PROJECT = 'test-project' // TODO: This will be replaced with the `isomorphic-client` config.
 const RETAIL_REACT_APP_DEMO = 'retail-react-app-demo'
 const RETAIL_REACT_APP = 'retail-react-app'
+const MRT_REFERENCE_APP = 'mrt-reference-app'
 
 const PRIVATE_PRESETS = [
     TEST_PROJECT,
     EXPRESS_MINIMAL_TEST_PROJECT,
-    TYPESCRIPT_MINIMAL_TEST_PROJECT
+    TYPESCRIPT_MINIMAL_TEST_PROJECT,
+    MRT_REFERENCE_APP
 ]
 const PUBLIC_PRESETS = [
     RETAIL_REACT_APP_DEMO,
@@ -464,6 +466,12 @@ const main = (opts) => {
                     })
                 case TEST_PROJECT:
                     return runGenerator(testProjectAnswers(), opts)
+                case MRT_REFERENCE_APP:
+                    return runTemplateGenerator(
+                        'mrt-reference-app',
+                        opts,
+                        'template-mrt-reference-app'
+                    )
                 case RETAIL_REACT_APP_DEMO:
                     return Promise.resolve()
                         .then(() => runGenerator(demoProjectAnswers(), opts))

packages/pwa-kit-dev/src/configs/webpack/config.js

@@ -366,12 +366,6 @@ const renderer =
                         excludeWarnings: true,
                         skipFirstNotification: true
                     }),
-
-                    // Must only appear on one config – this one is the only mandatory one.
-                    new CopyPlugin({
-                        patterns: [{from: 'app/static/', to: 'static/'}]
-                    }),
-
                     analyzeBundle && getBundleAnalyzerPlugin('server-renderer')
                 ].filter(Boolean)
             }
@@ -395,6 +389,10 @@ const ssr = (() => {
                     },
                     plugins: [
                         ...config.plugins,
+                        // This must only appear on one config – this one is the only mandatory one.
+                        new CopyPlugin({
+                            patterns: [{from: 'app/static/', to: 'static/'}]
+                        }),
                         analyzeBundle && getBundleAnalyzerPlugin(SSR)
                     ].filter(Boolean)
                 }

packages/pwa-kit-dev/src/ssr/server/build-dev-server.js

@@ -26,8 +26,6 @@ import {
     REQUEST_PROCESSOR
 } from '../../configs/webpack/config-names'
 import {randomUUID} from 'crypto'
-const projectDir = process.cwd()
-const projectWebpackPath = path.resolve(projectDir, 'webpack.config.js')
 
 const chalk = require('chalk')
 
@@ -125,6 +123,8 @@ export const DevServerMixin = {
         // But the SSR render function must!
 
         let config = require('../../configs/webpack/config')
+
+        const projectWebpackPath = path.resolve(app.options.projectDir, 'webpack.config.js')
         if (fs.existsSync(projectWebpackPath)) {
             config = require(projectWebpackPath)
         }
@@ -214,36 +214,27 @@ export const DevServerMixin = {
     },
 
     serveStaticFile(filePath, opts = {}) {
+        // Warning: Ugly part of the Bundle spec that we need to maintain.
+        //
+        // This function assumes that an SDK build step will copy all
+        // non-webpacked assets from the 'app' dir to the 'build' dir.
+        //
+        // If you look carefully through the history, this has never
+        // been true though – assets get copied from app/static to
+        // build/static but this isn't really clear from the API.
+        //
+        // To see where those assets get copied, see here:
+        //
+        // packages/pwa-kit-dev/src/configs/webpack/config.js
+        //
+        // We have plans to make a robust Bundle spec in 246!
+        //
+        // Discussion here:
+        //
+        // https://salesforce-internal.slack.com/archives/C8YDDMKFZ/p1677793769255659?thread_ts=1677791840.174309&cid=C8YDDMKFZ
         return (req, res) => {
-            req.app.__devMiddleware.waitUntilValid(() => {
-                const options = req.app.options
-                const webpackStats = req.app.__devMiddleware.context.stats.stats
-
-                const serverCompilation = webpackStats.find(
-                    // static files are copied into bundle
-                    // in the server webpack config
-                    (stat) => stat.compilation.name === SERVER
-                ).compilation
-                const {assetsInfo} = serverCompilation
-                const assetInfo = assetsInfo.get(filePath)
-
-                // if the asset is not in the webpack bundle, then
-                // return 404, we don't care whether or not the file
-                // exists in the local file system
-                if (!assetInfo) {
-                    res.sendStatus(404)
-                    return
-                }
-                const {sourceFilename} = assetInfo
-                const sourceFilePath = path.resolve(sourceFilename)
-
-                res.sendFile(sourceFilePath, {
-                    headers: {
-                        'cache-control': options.defaultCacheControl
-                    },
-                    ...opts
-                })
-            })
+            const baseDir = path.resolve(req.app.options.projectDir, 'app')
+            return this._serveStaticFile(req, res, baseDir, filePath, opts)
         }
     },
 

packages/pwa-kit-dev/src/ssr/server/build-dev-server.test.js

@@ -738,59 +738,24 @@ describe('DevServer service worker', () => {
 
         test(`${name} (and handle 404s correctly)`, () => {
             const app = createApp()
+            app.get('/worker.js(.map)?', NoWebpackDevServerFactory.serveServiceWorker)
 
             return request(app).get(requestPath).expect(404)
         })
     })
 })
 
 describe('DevServer serveStaticFile', () => {
-    // This isn't ideal! We need a way to test the dev middleware
-    // including the on demand webpack compiler. However, the webpack config and
-    // the Dev server assumes the code runs at the root of a project.
-    // When we run the tests, we are not in a project.
-    // We have a /test_fixtures project, but Jest does not support process.chdir(),
-    // nor mocking process.cwd(), so we mock the dev middleware for now.
-    // TODO: create a proper testing fixture project and run the tests in the isolated
-    // project environment.
-    const MockWebpackDevMiddleware = {
-        waitUntilValid: (cb) => cb(),
-        context: {
-            stats: {
-                stats: [
-                    {
-                        compilation: {
-                            name: 'server',
-                            assetsInfo: new Map([
-                                [
-                                    'static/favicon.ico',
-                                    {
-                                        sourceFilename: path.resolve(
-                                            testFixtures,
-                                            'app/static/favicon.ico'
-                                        )
-                                    }
-                                ]
-                            ])
-                        }
-                    }
-                ]
-            }
-        }
-    }
-
     test('should serve static files', async () => {
-        const options = opts()
+        const options = opts({projectDir: testFixtures})
         const app = NoWebpackDevServerFactory._createApp(options)
-        app.__devMiddleware = MockWebpackDevMiddleware
         app.use('/test', NoWebpackDevServerFactory.serveStaticFile('static/favicon.ico'))
         return request(app).get('/test').expect(200)
     })
 
     test('should return 404 if static file does not exist', async () => {
-        const options = opts()
+        const options = opts({projectDir: testFixtures})
         const app = NoWebpackDevServerFactory._createApp(options)
-        app.__devMiddleware = MockWebpackDevMiddleware
         app.use('/test', NoWebpackDevServerFactory.serveStaticFile('static/IDoNotExist.ico'))
         return request(app).get('/test').expect(404)
     })

packages/pwa-kit-runtime/src/ssr/server/build-remote-server.js

@@ -86,6 +86,9 @@ export const RemoteServerFactory = {
          * testing, or to handle non-standard projects.
          */
         const defaults = {
+            // For test only – allow the project dir to be overridden.
+            projectDir: process.cwd(),
+
             // Absolute path to the build directory
             buildDir: path.resolve(process.cwd(), BUILD),
 
@@ -741,17 +744,25 @@ export const RemoteServerFactory = {
      */
     serveStaticFile(filePath, opts = {}) {
         return (req, res) => {
-            const options = req.app.options
-            const file = path.resolve(options.buildDir, filePath)
-            res.sendFile(file, {
-                headers: {
-                    [CACHE_CONTROL]: options.defaultCacheControl
-                },
-                ...opts
-            })
+            const baseDir = req.app.options.buildDir
+            return this._serveStaticFile(req, res, baseDir, filePath, opts)
         }
     },
 
+    /**
+     * @private
+     */
+    _serveStaticFile(req, res, baseDir, filePath, opts = {}) {
+        const options = req.app.options
+        const file = path.resolve(baseDir, filePath)
+        res.sendFile(file, {
+            headers: {
+                [CACHE_CONTROL]: options.defaultCacheControl
+            },
+            ...opts
+        })
+    },
+
     /**
      * Server side rendering entry.
      *

packages/template-mrt-reference-app/.eslintignore

@@ -0,0 +1,7 @@
+build
+coverage
+docs
+app/static
+jest.config.js
+webpack
+scripts/generator/assets

packages/template-mrt-reference-app/.eslintrc.js

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2021, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+module.exports = {
+    extends: require.resolve('pwa-kit-dev/configs/eslint/eslint-config')
+}

packages/template-mrt-reference-app/.gitignore

@@ -0,0 +1,3 @@
+build
+node_modules
+build.tar

packages/template-mrt-reference-app/.prettierignore

@@ -0,0 +1,4 @@
+build
+docs
+coverage
+scripts/generator/assets

packages/template-mrt-reference-app/.prettierrc.yaml

@@ -0,0 +1,7 @@
+printWidth: 100
+singleQuote: true
+semi: false
+bracketSpacing: false
+tabWidth: 4
+arrowParens: 'always'
+trailingComma: 'none'

packages/template-mrt-reference-app/LICENSE

@@ -0,0 +1,14 @@
+BSD 3-Clause License
+
+Copyright (c) 2021, Salesforce.com, Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+3. Neither the name of Salesforce.com nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

packages/template-mrt-reference-app/README.md

@@ -0,0 +1,25 @@
+# template-mrt-reference-app
+
+This is the reference app that the Managed Runtime Team uses to test
+features in the platform (eg. TLS versions, successful deploys, proxy
+behaviour).
+
+This app is intended to be a thin layer over the bare minimum SDKs
+that we expect/require all MRT users to use.
+
+Although MRT started life primarily as a hosting environment for
+React apps, we're expanding that to support other technologies –
+this app lets us test those platform features that are universal
+across all apps, regardless of framework choice.
+
+
+## Usage in CI/CD tests ⛅️
+
+This app is deployed to several pre-existing test Targets as part 
+of a "smoke-test" of the MRT platform. To see the Targets in use
+take a look at the CI config in
+
+https://git.soma.salesforce.com/cc-mobify/ssr-infrastructure/blob/sfci-main/Jenkinsfile#L176
+
+These smoke-tests are triggered by merges to the main development 
+branch of the above repository.

packages/template-mrt-reference-app/app/request-processor.js

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023, Salesforce, Inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+import {QueryParameters} from 'pwa-kit-runtime/utils/ssr-request-processing'
+
+const exclusions = ['removeme']
+
+export const processRequest = ({path, querystring, parameters}) => {
+    console.assert(parameters, 'Missing parameters')
+
+    // Query string filtering
+
+    // Build a first QueryParameters object from the given querystring
+    const queryParameters = new QueryParameters(querystring)
+
+    // Build a second QueryParameters from the first, with all
+    // excluded parameters removed
+    const filtered = QueryParameters.from(
+        queryParameters.parameters.filter(
+            // parameter.key is always lower-case
+            (parameter) => !exclusions.includes(parameter.key)
+        )
+    )
+
+    // Re-generate the querystring
+    querystring = filtered.toString()
+
+    return {
+        path,
+        querystring
+    }
+}