233 lines
11 KiB
Markdown
233 lines
11 KiB
Markdown
# nx.json
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The `nx.json` file configures the Nx CLI and project defaults.
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The following is an expanded version showing all options. Your `nx.json` will likely be much shorter.
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```json {% fileName="nx.json" %}
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{
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"extends": "nx/presets/npm.json",
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"affected": {
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"defaultBase": "main"
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},
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"workspaceLayout": {
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"appsDir": "demos",
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"libsDir": "packages"
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},
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"implicitDependencies": {
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"package.json": {
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"dependencies": "*",
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"devDependencies": "*"
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},
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"tsconfig.base.json": "*",
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"nx.json": "*"
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},
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"namedInputs": {
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"default": ["{projectRoot}/**/*"],
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"production": ["!{projectRoot}/**/*.spec.tsx"]
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},
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"targetDefaults": {
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"build": {
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"inputs": ["production", "^production"],
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"dependsOn": ["^build"]
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}
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},
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"generators": {
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"@nx/js:library": {
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"buildable": true
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}
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},
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"tasksRunnerOptions": {
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"default": {
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"runner": "nx/tasks-runners/default",
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"options": {
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"cacheableOperations": ["build", "lint", "test", "e2e"]
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}
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}
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}
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}
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```
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### Extends
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Some presets use the `extends` property to hide some default options in a separate json file. The json file specified in the `extends` property is located in your `node_modules` folder. The Nx preset files are specified in [the `nx` package](https://github.com/nrwl/nx/tree/master/packages/nx/presets).
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### NPM Scope
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The `npmScope` property of the `nx.json` file is deprecated as of version 16.2.0. `npmScope` was used as a prefix for the names of newly created projects. The new recommended way to define the organization prefix is to set the `name` property in the root `package.json` file to `@my-org/root`. Then `@my-org/` will be used as a prefix for all newly created projects.
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In Nx 16, if the `npmScope` property is present, it will be used as a prefix. If the `npmScope` property is not present, the `name` property of the root `package.json` file will be used to infer the prefix.
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In Nx 17, the `npmScope` property will be ignored.
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### Affected
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Tells Nx which branch and HEAD to use when calculating affected projects.
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- `defaultBase` defines the default base branch, defaulted to `main`.
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### Workspace Layout
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You can add a `workspaceLayout` property to modify where libraries and apps are located.
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```json
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{
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"workspaceLayout": {
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"appsDir": "demos",
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"libsDir": "packages"
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}
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}
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```
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These settings would store apps in `/demos/` and libraries in `/packages/`. The paths specified are relative to the
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workspace root.
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### inputs & namedInputs
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Named inputs defined in `nx.json` are merged with the named inputs defined in each project's project.json.
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In other words, every project has a set of named inputs, and it's defined as: `{...namedInputsFromNxJson, ...namedInputsFromProjectsProjectJson}`.
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Defining `inputs` for a given target would replace the set of inputs for that target name defined in `nx.json`.
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Using pseudocode `inputs = projectJson.targets.build.inputs || nxJson.targetDefaults.build.inputs`.
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You can also define and redefine named inputs. This enables one key use case, where your `nx.json` can define things
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like this (which applies to every project):
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```
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"test": {
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"inputs": [
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"default",
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"^production"
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]
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}
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```
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And projects can define their `production` fileset, without having to redefine the inputs for the `test` target.
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```json {% fileName="project.json" %}
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{
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"namedInputs": {
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"production": ["default", "!{projectRoot}/**/*.test.js"]
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}
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}
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```
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In this case Nx will use the right `production` input for each project.
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{% cards %}
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{% card title="Project Configuration reference" type="documentation" description="inputs and namedInputs are also described in the project configuration reference" url="/reference/project-configuration#inputs-&-namedinputs" /%}
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{% card title="Customizing inputs and namedInputs" type="documentation" description="This guide walks through a few examples of how to customize inputs and namedInputs" url="/concepts/more-concepts/customizing-inputs" /%}
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{% /cards %}
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### Target Defaults
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Target defaults provide ways to set common options for a particular target in your workspace. When building your project's configuration, we merge it with up to 1 default from this map. For a given target, we look at its name and its executor. We then check target defaults for any of the following combinations:
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- `` `${executor}` ``
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- `` `${targetName}` ``
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Whichever of these we find first, we use as the base for that target's configuration. Some common scenarios for this follow.
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Targets can depend on other targets. A common scenario is having to build dependencies of a project first before
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building the project. The `dependsOn` property in `project.json` can be used to define the list of dependencies of an
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individual target.
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Often the same `dependsOn` configuration has to be defined for every project in the repo, and that's when
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defining `targetDefaults` in `nx.json` is helpful.
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```json {% fileName="nx.json" %}
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{
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"targetDefaults": {
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"build": {
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"dependsOn": ["^build"]
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}
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}
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}
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```
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The configuration above is identical to adding `{"dependsOn": ["^build"]}` to every build target of every project.
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For full documentation of the `dependsOn` property, see the [project configuration reference](/reference/project-configuration#dependson).
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{% cards %}
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{% card title="Project Configuration reference" type="documentation" description="For full documentation of the `dependsOn` property, see the project configuration reference" url="/reference/project-configuration#dependson" /%}
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{% /cards %}
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Another target default you can configure is `outputs`:
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```json {% fileName="nx.json" %}
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{
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"targetDefaults": {
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"build": {
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"outputs": ["{projectRoot}/custom-dist"]
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}
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}
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}
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```
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When defining any options or configurations inside of a target default, you may use the `{workspaceRoot}` and `{projectRoot}` tokens. This is useful for defining things like the outputPath or tsconfig for many build targets.
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```json {% fileName="nx.json" %}
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{
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"targetDefaults": {
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"@nx/js:tsc": {
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"options": {
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"main": "{projectRoot}/src/index.ts"
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},
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"configurations": {
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"prod": {
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"tsconfig": "{projectRoot}/tsconfig.prod.json"
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}
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},
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"inputs": ["prod"],
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"outputs": ["{workspaceRoot}/{projectRoot}"]
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},
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"build": {
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"inputs": ["prod"],
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"outputs": ["{workspaceRoot}/{projectRoot}"]
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}
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}
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}
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```
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{% callout type="note" title="Target Default Priority" %}
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Note that the inputs and outputs are respecified on the @nx/js:tsc default configuration. This is **required**, as when reading target defaults Nx will only ever look at one key. If there is a default configuration based on the executor used, it will be read first. If not, Nx will fall back to looking at the configuration based on target name. For instance, running `nx build project` will read the options from `targetDefaults[@nx/js:tsc]` if the target configuration for build uses the @nx/js:tsc executor. It **would not** read any of the configuration from the `build` target default configuration unless the executor does not match.
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{% /callout %}
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### Generators
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Default generator options are configured in `nx.json` as well. For instance, the following tells Nx to always
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pass `--buildable=true` when creating new libraries.
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```json {% fileName="nx.json" %}
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{
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"generators": {
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"@nx/js:library": {
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"buildable": true
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}
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}
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}
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```
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### Tasks Runner Options
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> A task is an invocation of a target.
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Tasks runners are invoked when you run `nx test`, `nx build`, `nx run-many`, `nx affected`, and so on. The tasks runner
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named "default" is used by default. Specify a different one like this `nx run-many -t build --all --runner=another`.
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Tasks runners can accept different options. The following are the options supported
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by `"nx/tasks-runners/default"` and `"nx-cloud"`.
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| Property | Description |
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| ----------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| cacheableOperations | defines the list of targets/operations that are cached by Nx |
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| parallel | defines the max number of targets ran in parallel (in older versions of Nx you had to pass `--parallel --maxParallel=3` instead of `--parallel=3`) |
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| captureStderr | defines whether the cache captures stderr or just stdout |
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| skipNxCache | defines whether the Nx Cache should be skipped (defaults to `false`) |
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| cacheDirectory | defines where the local cache is stored (defaults to `node_modules/.cache/nx`) |
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| encryptionKey | (when using `"nx-cloud"` only) defines an encryption key to support end-to-end encryption of your cloud cache. You may also provide an environment variable with the key `NX_CLOUD_ENCRYPTION_KEY` that contains an encryption key as its value. The Nx Cloud task runner normalizes the key length, so any length of key is acceptable |
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| selectivelyHashTsConfig | only hash the path mapping of the active project in the `tsconfig.base.json` (e.g., adding/removing projects doesn't affect the hash of existing projects) (defaults to `false`) |
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You can configure `parallel` in `nx.json`, but you can also pass them in the
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terminal `nx run-many -t test --parallel=5`.
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