Javascript Clients

Auto generated Javascript clients for swagger API

Overview

This repository is set up as a monorepo for all API clients to use one configuration and release cycle. This repo is using NX as its monorepo manager and Github Actions for CI/CD as well as publishing packages to NPM.

Local development

We are using Java to install and build this generator. Please install Java and preferably Maven as well so you don't have any issues when building this new generator.

• Once you have Java and Maven installed you can install dependencies by running npm install

• When you have dependencies installed you can run build anytime you change something in the generator npm run build:generator

Troubleshooting

NX Daemon

Sometimes NX fails to make it through all of the client packages when running the build/generate tasks with the following error:

 >  NX   Daemon process terminated and closed the connection

   Please rerun the command, which will restart the daemon.
   If you get this error again, check for any errors in the daemon process logs found in: /RedHatInsights/javascript-clients/.nx/cache/d/daemon.log

If this occurs, try running npm run nx:reset and retrigger the build/generate task.

I do not see my changes after running a build

By default NX caches the build results of the clients upon initial build. Consecutive builds will then be cached unless the client changes. To avoid this caching, run npm run build:no-cache

Creating a new client

Run npm run create-client and enter your new client name (e.g. entering notifications will generate notifications-client). All the necessary TS and NX config files will be created for you.

Specifying your OpenAPI spec locations

After client creation, add your OpenAPI spec locations as an object entries in your client's project.json NX configuration for the client-generator executor. The client-generator supports multiple spec entries. Entries should follow the pattern below.

{
  "name": "@redhat-cloud-services/CLIENTNAME-client",
  ...
  "targets": {
    "generate": {
      "executor": "@redhat-cloud-services/build-utils:client-generator",
      "options": {
        "specs": {
          "default": "https://raw.githubusercontent.com/RedHatInsights/insights-rbac/master/docs/source/specs/openapi.json",
          "v2": "https://raw.githubusercontent.com/RedHatInsights/insights-rbac/master/docs/source/specs/v2/openapi.v2.yaml"
        }
      }
    },
    ...
  }
}

where the specs object keys are the directories to export your endpoints and the corresponding key values as the location to the spec itself. For keys, default will export all your endpoints at the root level of the client and any key other than default will export to that path instead. An example import for the above default spec entry as well as the v2 spec entry can be seen in the following examples

default:

import { SomeEndpoint } from @redhat-cloud-services/some-client/dist/SomeEndpoint

v2:

import { SomeV2Endpoint } from @redhat-cloud-services/some-client/dist/v2/SomeV2Endpoint

Generating and Building clients

From the root javascript-clients folder:

• To generate all clients run npm run generate -- NX will run through our client-generator executor located in @redhat-cloud-services/build-utils to execute the openapi-generator-cli command to generate your client based off of the specs defined in your client's openapi-spec.json. To generate one client, run nx run @redhat-cloud-services/${your-client-name}-client:generate. If you don't have openapi-generator-cli installed globally, you will need to run npm install -g @openapitools/openapi-generator-cli
• To build all clients and generate their dist to be published run npm run build -- NX will only build packages when it detects that a change has been made to the client (otherwise it will reference the cache). After a client has been built, our builder (located in packages/build-utils) will move each client's dist into a top-level dist for publishing to NPM after your PR is merged. Use npx nx run-many --skip-nx-cache -t build --exclude=@redhat-cloud-services/CLIENTNAME-client if you wish to build all clients regardless of whether or not a change has been made. To build one client, run nx run @redhat-cloud-services/${your-client-name}-client:build. If you don't have tsc installed globally, you will need to run npm install -g @typescript

Custom Module Federation Generator

As the default, we use typescript-axios to generate a client based on their OpenAPI spec. In addition, we have a custom generator available for use built with module federation in mind which allows for treeshaking by webpack. This will create a new folder for each endpoint allowing consumers to import only the endpoints they are going to use without the need of importing the entire API. This generator should be a replacement for the regular typescript-axios generator. See below for an example script to use the new generator:

{
  "name": "@redhat-cloud-services/some-client-name",
  "version": "1.0.0",
  "scripts": {
    "generate": "TS_POST_PROCESS_FILE='../../postProcess.sh' openapi-generator-cli generate -i $SPEC --custom-generator=../../target/typescript-axios-webpack-module-federation-openapi-generator-1.0.0.jar -g typescript-axios-webpack-module-federation -o . --skip-validate-spec --enable-post-process-file"
  }
}

If you've previously used the typescript-axios generator you will also have to change the version of generator-cli.version in openapitool.json to at least 6.6.0.