Created
August 7, 2018 22:23
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Example of how to use the loadBundles function as defined in https://gist.github.com/svdoever/aebdbc6acf0bd15e354c18af9ed1bd47
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| process.env.ComponentServerBundles = JSON.stringify({ | |
| default: './server-bundle', | |
| pwa: './server-bundle', | |
| pwaremote: 'http://myserver.com/server-bundle.js' | |
| }); | |
| // Handy for debugging to use a direct require so Visual Studio code can set breakpoints in the code | |
| // of the bundle we are debugging. | |
| let bundle_to_debug = require('./server-bundle'); | |
| if (process.env.NODE_ENV === 'production') { | |
| bundle_to_debug = undefined; | |
| } | |
| const path = require('path'); | |
| // componentSpecifier is a string in the format "pwa:myComponent", if only "myComponent" is specified the | |
| // component in the "default" bundle is assumed. | |
| function getComponent(componentSpecifier) { | |
| console.log(`Requested component: ${componentSpecifier}`); | |
| let bundleName, componentName; | |
| if (componentSpecifier.includes(':')) { | |
| const parts = componentSpecifier.split(':'); | |
| if (parts[0] === '') { | |
| bundleName = 'default'; | |
| componentName = parts[1]; | |
| } else { | |
| bundleName = parts[0]; | |
| componentName = parts[1]; | |
| } | |
| } else { | |
| bundleName = 'default'; | |
| componentName = componentSpecifier; | |
| } | |
| if (typeof bundle_to_debug !== 'undefined' && bundle_to_debug) { | |
| console.log(`Using 'bundle_to_debug' to resolve requested component '${componentSpecifier}' as component '${componentName}'.`); | |
| component = bundle_to_debug[componentName]; | |
| bundleName = 'bundle_to_debug'; | |
| } else { | |
| if (!bundles[bundleName]) { | |
| throw new Error(`getComponent(): Bundle '${bundleName}' not found.`); | |
| } | |
| component = bundles[bundleName][componentName]; | |
| } | |
| if (!component) { | |
| throw new Error(`getComponent(): component '${componentName}' not found in bundle '${bundleName}'.`); | |
| } | |
| if (typeof component !== "function") { | |
| throw new Error(`getComponent(): component '${componentName}' is found in bundle '${bundleName}' but it is not a function.`); | |
| } | |
| return component; | |
| } | |
| let bundleLoaderPromises; // all promises that must be resolved so we know all required server bundles are loaded | |
| let bundles = {}; | |
| if (typeof bundle_to_debug == 'undefined') { | |
| if (!process.env.ComponentServerBundles) { | |
| console.error("Environment variable process.env.ComponentServerBundles is missing. Should contain definition of bundles, i.e.: { pwa: './server-bundle.js', stories: 'http://myserver.com/story-bundle.js' }"); | |
| process.exit(1); | |
| } | |
| let bundlesConfiguration; | |
| try { | |
| bundlesConfiguration = JSON.parse(process.env.ComponentServerBundles); | |
| } catch(error) { | |
| console.error(`Failed to parse process.env.ComponentServerBundles due to error: ${error.message}.\nCurrent value: ${process.env.ComponentServerBundles}`); | |
| process.exit(1); | |
| } | |
| bundleLoaderPromises = loadBundles(bundlesConfiguration, bundles); | |
| } else { | |
| // We don't need to load bundles, overridden by: let bundle_to_debug = "./server-bundle.js" | |
| // Create an empty array for the bundle promises so Promise.all(bundleLoaderPromises) directly resolves. | |
| console.log("Using configured bundle_to_debug"); | |
| bundleLoaderPromises = []; | |
| } | |
| Promise.all(bundleLoaderPromises).then(() => { | |
| // Do something with the bundles, a component can be retrieved like: | |
| // let myComponent = getComponent("pwa:MyComponent") | |
| }).catch(reason => { | |
| console.error(reason.message); | |
| process.exit(1); | |
| }); |
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