Kit Langton
119 lines
3.9 KiB
TypeScript
119 lines
3.9 KiB
TypeScript
import { NodeFileSystem, NodePath } from "@effect/platform-node"
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import { Effect, FileSystem, Layer, Path, Schema, ServiceMap } from "effect"
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import { FetchHttpClient, HttpClient, HttpClientRequest, HttpClientResponse } from "effect/unstable/http"
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import { Global } from "../global"
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import { Log } from "../util/log"
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import { withTransientReadRetry } from "@/util/effect-http-client"
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class IndexSkill extends Schema.Class<IndexSkill>("IndexSkill")({
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name: Schema.String,
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files: Schema.Array(Schema.String),
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}) {}
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class Index extends Schema.Class<Index>("Index")({
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skills: Schema.Array(IndexSkill),
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}) {}
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const skillConcurrency = 4
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const fileConcurrency = 8
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export namespace DiscoveryService {
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export interface Service {
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readonly pull: (url: string) => Effect.Effect<string[]>
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}
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}
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export class DiscoveryService extends ServiceMap.Service<DiscoveryService, DiscoveryService.Service>()(
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"@opencode/SkillDiscovery",
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) {
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static readonly layer = Layer.effect(
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DiscoveryService,
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Effect.gen(function* () {
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const log = Log.create({ service: "skill-discovery" })
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const fs = yield* FileSystem.FileSystem
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const path = yield* Path.Path
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const http = HttpClient.filterStatusOk(withTransientReadRetry(yield* HttpClient.HttpClient))
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const cache = path.join(Global.Path.cache, "skills")
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const download = Effect.fn("DiscoveryService.download")(function* (url: string, dest: string) {
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if (yield* fs.exists(dest).pipe(Effect.orDie)) return true
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return yield* HttpClientRequest.get(url).pipe(
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http.execute,
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Effect.flatMap((res) => res.arrayBuffer),
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Effect.flatMap((body) =>
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fs
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.makeDirectory(path.dirname(dest), { recursive: true })
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.pipe(Effect.flatMap(() => fs.writeFile(dest, new Uint8Array(body)))),
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),
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Effect.as(true),
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Effect.catch((err) =>
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Effect.sync(() => {
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log.error("failed to download", { url, err })
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return false
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}),
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),
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)
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})
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const pull: DiscoveryService.Service["pull"] = Effect.fn("DiscoveryService.pull")(function* (url: string) {
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const base = url.endsWith("/") ? url : `${url}/`
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const index = new URL("index.json", base).href
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const host = base.slice(0, -1)
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log.info("fetching index", { url: index })
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const data = yield* HttpClientRequest.get(index).pipe(
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HttpClientRequest.acceptJson,
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http.execute,
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Effect.flatMap(HttpClientResponse.schemaBodyJson(Index)),
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Effect.catch((err) =>
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Effect.sync(() => {
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log.error("failed to fetch index", { url: index, err })
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return null
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}),
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),
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)
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if (!data) return []
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const list = data.skills.filter((skill) => {
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if (!skill.files.includes("SKILL.md")) {
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log.warn("skill entry missing SKILL.md", { url: index, skill: skill.name })
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return false
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}
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return true
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})
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const dirs = yield* Effect.forEach(
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list,
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(skill) =>
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Effect.gen(function* () {
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const root = path.join(cache, skill.name)
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yield* Effect.forEach(
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skill.files,
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(file) => download(new URL(file, `${host}/${skill.name}/`).href, path.join(root, file)),
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{ concurrency: fileConcurrency },
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)
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const md = path.join(root, "SKILL.md")
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return (yield* fs.exists(md).pipe(Effect.orDie)) ? root : null
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}),
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{ concurrency: skillConcurrency },
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)
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return dirs.filter((dir): dir is string => dir !== null)
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})
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return DiscoveryService.of({ pull })
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}),
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)
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static readonly defaultLayer = DiscoveryService.layer.pipe(
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Layer.provide(FetchHttpClient.layer),
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Layer.provide(NodeFileSystem.layer),
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Layer.provide(NodePath.layer),
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)
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}
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