62 lines
2.7 KiB
TypeScript
62 lines
2.7 KiB
TypeScript
/**
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* Dynamic-mount lifecycle over the `cordis-dynamic` group fiber: settle a
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* sandbox-produced plugin as a child fiber (never leaving a failed fiber
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* mounted), and report the services a settled-but-pending fiber still waits
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* for. Disposal needs no helper — a mount unwinds through an ordinary awaited
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* `fiber.dispose()`, because everything the plugin registered is an effect on
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* its fiber.
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*
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* @module @deepseek-ai/dsh-tool-cordis/mount
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*/
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import type { Context, Fiber, Plugin } from 'cordis'
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import { guardedPlugin } from './guard.ts'
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/** One tracked dynamic mount: the fiber plus the display name captured at mount time. */
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export interface DynamicMount {
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/** The child fiber under the `cordis-dynamic` group. */
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fiber: Fiber
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/** The plugin's display name at mount time (its `name`, else `<anonymous>`). */
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pluginName: string
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}
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/**
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* Await the group, mount and settle one guarded child, and dispose it before rethrowing any
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* startup failure so a failed mount never lingers. A valid unresolved inject may remain pending.
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* @param group - the `cordis-dynamic` group fiber every mount hangs under.
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* @param plugin - the plugin the sandbox returned; wrapped with the registration guard before mounting.
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* @returns the settled child fiber (possibly pending on unsatisfied `inject`).
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*/
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export async function mountDynamic(group: Fiber, plugin: Plugin): Promise<Fiber> {
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await group.await()
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const fiber = group.ctx.plugin(guardedPlugin(plugin))
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try {
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await fiber.await()
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} catch (error) {
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await fiber.dispose()
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const message = error instanceof Error ? error.message : String(error)
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// The commonest startup collision is remounting a NEW version of a tool
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// while the old mount still holds the name — teach the replace recipe.
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if (message.includes('already registered')) {
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throw new Error(
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`${message} — to REPLACE something an earlier temporary Plugin registered, first cordis_unmount that Plugin's id `
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+ '(find it with cordis_inspect what:"temporary"), then mount the new version.',
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)
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}
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throw error instanceof Error ? error : new Error(message)
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}
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return fiber
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}
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/**
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* The services a fiber declared in `inject` that do not exist yet — a settled
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* fiber that is not active is waiting on exactly these (legal cordis
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* semantics: it activates when the service appears).
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* @param ctx - the context to resolve service existence against.
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* @param fiber - the mount fiber whose `inject` declarations are checked.
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* @returns the missing service names, in declaration order.
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*/
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export function missingServices(ctx: Context, fiber: Fiber): string[] {
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return Object.keys(fiber.inject).filter(service => ctx.get(service) === undefined)
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}
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