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|
const normalize = (directory: string) => directory.replace(/[\\/]+$/, "")
type State =
| {
status: "pending"
}
| {
status: "ready"
}
| {
status: "failed"
message: string
}
const state = new Map<string, State>()
const waiters = new Map<
string,
{
promise: Promise<State>
resolve: (state: State) => void
}
>()
function deferred() {
const box = { resolve: (_: State) => {} }
const promise = new Promise<State>((resolve) => {
box.resolve = resolve
})
return { promise, resolve: box.resolve }
}
export const Worktree = {
get(directory: string) {
return state.get(normalize(directory))
},
pending(directory: string) {
const key = normalize(directory)
const current = state.get(key)
if (current && current.status !== "pending") return
state.set(key, { status: "pending" })
},
ready(directory: string) {
const key = normalize(directory)
const next = { status: "ready" } as const
state.set(key, next)
const waiter = waiters.get(key)
if (!waiter) return
waiters.delete(key)
waiter.resolve(next)
},
failed(directory: string, message: string) {
const key = normalize(directory)
const next = { status: "failed", message } as const
state.set(key, next)
const waiter = waiters.get(key)
if (!waiter) return
waiters.delete(key)
waiter.resolve(next)
},
wait(directory: string) {
const key = normalize(directory)
const current = state.get(key)
if (current && current.status !== "pending") return Promise.resolve(current)
const existing = waiters.get(key)
if (existing) return existing.promise
const waiter = deferred()
waiters.set(key, waiter)
return waiter.promise
},
}
|
