Kit Langton
112 lines
3.1 KiB
TypeScript
112 lines
3.1 KiB
TypeScript
import { Effect, Layer, ServiceMap } from "effect"
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import { Bus } from "@/bus"
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import { BusEvent } from "@/bus/bus-event"
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import { InstanceState } from "@/effect/instance-state"
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import { makeRunPromise } from "@/effect/run-service"
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import { FileWatcher } from "@/file/watcher"
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import { Log } from "@/util/log"
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import { git } from "@/util/git"
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import { Instance } from "./instance"
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import z from "zod"
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export namespace Vcs {
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const log = Log.create({ service: "vcs" })
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export const Event = {
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BranchUpdated: BusEvent.define(
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"vcs.branch.updated",
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z.object({
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branch: z.string().optional(),
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}),
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),
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}
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export const Info = z
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.object({
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branch: z.string(),
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})
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.meta({
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ref: "VcsInfo",
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})
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export type Info = z.infer<typeof Info>
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export interface Interface {
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readonly init: () => Effect.Effect<void>
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readonly branch: () => Effect.Effect<string | undefined>
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}
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interface State {
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current: string | undefined
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}
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export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Vcs") {}
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export const layer = Layer.effect(
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Service,
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Effect.gen(function* () {
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const state = yield* InstanceState.make<State>(
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Effect.fn("Vcs.state")((ctx) =>
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Effect.gen(function* () {
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if (ctx.project.vcs !== "git") {
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return { current: undefined }
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}
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const getCurrentBranch = async () => {
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const result = await git(["rev-parse", "--abbrev-ref", "HEAD"], {
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cwd: ctx.worktree,
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})
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if (result.exitCode !== 0) return undefined
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const text = result.text().trim()
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return text || undefined
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}
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const value = {
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current: yield* Effect.promise(() => getCurrentBranch()),
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}
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log.info("initialized", { branch: value.current })
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yield* Effect.acquireRelease(
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Effect.sync(() =>
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Bus.subscribe(
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FileWatcher.Event.Updated,
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Instance.bind(async (evt) => {
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if (!evt.properties.file.endsWith("HEAD")) return
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const next = await getCurrentBranch()
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if (next !== value.current) {
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log.info("branch changed", { from: value.current, to: next })
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value.current = next
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Bus.publish(Event.BranchUpdated, { branch: next })
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}
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}),
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),
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),
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(unsubscribe) => Effect.sync(unsubscribe),
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)
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return value
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}),
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),
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)
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return Service.of({
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init: Effect.fn("Vcs.init")(function* () {
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yield* InstanceState.get(state)
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}),
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branch: Effect.fn("Vcs.branch")(function* () {
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return yield* InstanceState.use(state, (x) => x.current)
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}),
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})
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}),
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)
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const runPromise = makeRunPromise(Service, layer)
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export function init() {
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return runPromise((svc) => svc.init())
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}
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export function branch() {
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return runPromise((svc) => svc.branch())
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}
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}
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