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https://github.com/deepseek-ai/deepseek-harness
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85 lines
2.7 KiB
Markdown
85 lines
2.7 KiB
Markdown
# 5. Configuration
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English | [中文](05-config.zh.md)
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Each `cordis.yml` entry can carry a `config` block, and the plugin declares a schema that validates it before `apply` runs. Bad config fails the load with a precise error — the plugin never starts half-configured.
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## A configurable plugin
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Create `config-demo.ts` in `tmp/cordis-tutorial`:
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```ts
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import type { Context } from 'cordis'
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import Schema from 'schemastery'
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export const name = 'config-demo'
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export interface Config {
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greeting: string
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targets: string[]
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}
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export const Config: Schema<Config> = Schema.object({
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greeting: Schema.string().default('Hello'),
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targets: Schema.array(String).default(['world']),
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})
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export function apply(ctx: Context, config: Config) {
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for (const target of config.targets) {
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console.log(`${config.greeting}, ${target}!`)
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}
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}
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```
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The exported `Config` is both a TypeScript interface and a runtime schema with the same name — consumers get the type, Cordis gets the validator. This repo uses [Schemastery](https://github.com/shigma/schemastery) for schemas; Cordis itself accepts any [Standard Schema](https://standardschema.dev/) validator, so a plain object exported as `Config` will not work.
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Configure it:
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```yaml
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- name: './config-demo.ts'
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config:
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targets: ['alpha', 'beta']
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```
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Run:
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```
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Hello, alpha!
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Hello, beta!
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```
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`greeting` was omitted, so the schema default filled it in — `apply` always receives complete, validated config.
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## Fail loud
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Now feed it something invalid:
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```yaml
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- name: './config-demo.ts'
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config:
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targets: 'not-an-array'
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```
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```
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ValidationError: invalid config:
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- $.targets expected array but got not-an-array (at targets)
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```
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The plugin's fiber goes to FAILED, and this tutorial's launcher exits with status 1 after printing the error. A plugin should also reject schema-valid config that names an unavailable resource or provider as soon as it can resolve that reference.
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## Computed config values
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The loader used in this repo supports a `!!js` tag for config values that must be computed at load time, such as reading an API key from the environment:
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```yaml
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- name: '@deepseek-ai/dsh-llm-deepseek'
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config:
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apiKey: !!js process.env.DEEPSEEK_API_KEY
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```
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`!!js` works **only inside `config`**. Entry metadata (`name`, `id`, `disabled`, `inject`, ...) is static; `disabled: !!js ...` produces a truthy expression object that always disables the entry. See [loader configuration](../cordis-primer.md#loader-configuration).
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Next: [Composition and HMR](06-composition-and-hmr.md) — treating `cordis.yml` as the application.
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[](https://github.com/deepseek-harness/deepseek-harness)
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