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instance.ts
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114 lines (105 loc) · 3.4 KB
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import { Log } from "@/util/log"
import { Context } from "../util/context"
import { Project } from "./project"
import { State } from "./state"
import { iife } from "@/util/iife"
import { GlobalBus } from "@/bus/global"
import { Filesystem } from "@/util/filesystem"
interface Context {
directory: string
worktree: string
project: Project.Info
}
const context = Context.create<Context>("instance")
const cache = new Map<string, Promise<Context>>()
const disposal = {
all: undefined as Promise<void> | undefined,
}
export const Instance = {
async provide<R>(input: { directory: string; init?: () => Promise<any>; fn: () => R }): Promise<R> {
let existing = cache.get(input.directory)
if (!existing) {
Log.Default.info("creating instance", { directory: input.directory })
existing = iife(async () => {
const { project, sandbox } = await Project.fromDirectory(input.directory)
const ctx = {
directory: input.directory,
worktree: sandbox,
project,
}
await context.provide(ctx, async () => {
await input.init?.()
})
return ctx
})
cache.set(input.directory, existing)
}
const ctx = await existing
return context.provide(ctx, async () => {
return input.fn()
})
},
get directory() {
return context.use().directory
},
get worktree() {
return context.use().worktree
},
get project() {
return context.use().project
},
/**
* Check if a path is within the project boundary.
* Returns true if path is inside Instance.directory OR Instance.worktree.
* Paths within the worktree but outside the working directory should not trigger external_directory permission.
*/
containsPath(filepath: string) {
if (Filesystem.contains(Instance.directory, filepath)) return true
// Non-git projects set worktree to "/" which would match ANY absolute path.
// Skip worktree check in this case to preserve external_directory permissions.
if (Instance.worktree === "/") return false
return Filesystem.contains(Instance.worktree, filepath)
},
state<S>(init: () => S, dispose?: (state: Awaited<S>) => Promise<void>): () => S {
return State.create(() => Instance.directory, init, dispose)
},
async dispose() {
Log.Default.info("disposing instance", { directory: Instance.directory })
await State.dispose(Instance.directory)
cache.delete(Instance.directory)
GlobalBus.emit("event", {
directory: Instance.directory,
payload: {
type: "server.instance.disposed",
properties: {
directory: Instance.directory,
},
},
})
},
async disposeAll() {
if (disposal.all) return disposal.all
disposal.all = iife(async () => {
Log.Default.info("disposing all instances")
const entries = [...cache.entries()]
for (const [key, value] of entries) {
if (cache.get(key) !== value) continue
const ctx = await value.catch((error) => {
Log.Default.warn("instance dispose failed", { key, error })
return undefined
})
if (!ctx) {
if (cache.get(key) === value) cache.delete(key)
continue
}
if (cache.get(key) !== value) continue
await context.provide(ctx, async () => {
await Instance.dispose()
})
}
}).finally(() => {
disposal.all = undefined
})
return disposal.all
},
}