Use Executor Configurations
The configurations property provides extra sets of values that will be merged into the options map.
{
"build": {
"executor": "@nrwl/js:tsc",
"outputs": ["{workspaceRoot}/dist/libs/mylib"],
"dependsOn": ["^build"],
"options": {
"tsConfig": "libs/mylib/tsconfig.lib.json",
"main": "libs/mylib/src/main.ts"
},
"configurations": {
"production": {
"tsConfig": "libs/mylib/tsconfig-prod.lib.json"
}
}
}
}
You can select a configuration like this: nx build mylib --configuration=production or nx run mylib:build:production.
The following code snippet shows how the executor options get constructed:
require(`@nrwl/jest`).executors['jest']({
...options,
...selectedConfiguration,
...commandLineArgs,
}); // Pseudocode
The selected configuration adds/overrides the default options, and the provided command line args add/override the configuration options.
Default Configuration
When using multiple configurations for a given target, it's helpful to provide a default configuration. For example, running e2e tests for multiple environments. By default it would make sense to use a dev configuration for day to day work, but having the ability to run against an internal staging environment for the QA team.
{
"e2e": {
"executor": "@nrwl/cypress:cypress",
"options": {
"cypressConfig": "apps/my-app-e2e/cypress.config.ts"
},
"configurations": {
"dev": {
"devServerTarget": "my-app:serve"
},
"qa": {
"baseUrl": "https://some-internal-url.example.com"
}
},
"defaultConfiguration": "dev"
}
}
When running nx e2e my-app-e2e, the dev configuration will be used. In this case using the local dev server for my-app. You can always run the other configurations by explicitly providing the configuration i.e. nx e2e my-app-e2e --configuration=qa or nx run my-app-e2e:e2e:qa