Kit Langton
46 lines
1.5 KiB
TypeScript
46 lines
1.5 KiB
TypeScript
import { Effect } from "effect"
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import { context, type InstanceContext } from "./instance-context"
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import { InstanceStore } from "./instance-store"
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export type { InstanceContext } from "./instance-context"
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export type { LoadInput } from "./instance-store"
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export const Instance = {
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async provide<R>(input: { directory: string; init?: Effect.Effect<void>; fn: () => R }): Promise<R> {
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const ctx = await InstanceStore.runtime.runPromise((store) =>
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store.load({ directory: input.directory, init: input.init }),
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)
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return context.provide(ctx, async () => input.fn())
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},
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get current() {
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return context.use()
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},
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get directory() {
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return context.use().directory
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},
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get worktree() {
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return context.use().worktree
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},
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get project() {
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return context.use().project
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},
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/**
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* Captures the current instance ALS context and returns a wrapper that
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* restores it when called. Use this for callbacks that fire outside the
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* instance async context (native addons, event emitters, timers, etc.).
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*/
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bind<F extends (...args: any[]) => any>(fn: F): F {
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const ctx = context.use()
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return ((...args: any[]) => context.provide(ctx, () => fn(...args))) as F
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},
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/**
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* Run a synchronous function within the given instance context ALS.
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* Use this to bridge from Effect (where InstanceRef carries context)
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* back to sync code that reads Instance.directory from ALS.
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*/
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restore<R>(ctx: InstanceContext, fn: () => R): R {
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return context.provide(ctx, fn)
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},
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}
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