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import fs from "fs/promises"
import path from "path"
import z from "zod"
import { NamedError } from "@opencode-ai/util/error"
import { Global } from "../global"
import { Instance } from "../project/instance"
import { InstanceBootstrap } from "../project/bootstrap"
import { Project } from "../project/project"
import { Database, eq } from "../storage/db"
import { ProjectTable } from "../project/project.sql"
import { fn } from "../util/fn"
import { Log } from "../util/log"
import { Process } from "../util/process"
import { git } from "../util/git"
import { BusEvent } from "@/bus/bus-event"
import { GlobalBus } from "@/bus/global"
export namespace Worktree {
const log = Log.create({ service: "worktree" })
export const Event = {
Ready: BusEvent.define(
"worktree.ready",
z.object({
name: z.string(),
branch: z.string(),
}),
),
Failed: BusEvent.define(
"worktree.failed",
z.object({
message: z.string(),
}),
),
}
export const Info = z
.object({
name: z.string(),
branch: z.string(),
directory: z.string(),
})
.meta({
ref: "Worktree",
})
export type Info = z.infer<typeof Info>
export const CreateInput = z
.object({
name: z.string().optional(),
startCommand: z
.string()
.optional()
.describe("Additional startup script to run after the project's start command"),
})
.meta({
ref: "WorktreeCreateInput",
})
export type CreateInput = z.infer<typeof CreateInput>
export const RemoveInput = z
.object({
directory: z.string(),
})
.meta({
ref: "WorktreeRemoveInput",
})
export type RemoveInput = z.infer<typeof RemoveInput>
export const ResetInput = z
.object({
directory: z.string(),
})
.meta({
ref: "WorktreeResetInput",
})
export type ResetInput = z.infer<typeof ResetInput>
export const NotGitError = NamedError.create(
"WorktreeNotGitError",
z.object({
message: z.string(),
}),
)
export const NameGenerationFailedError = NamedError.create(
"WorktreeNameGenerationFailedError",
z.object({
message: z.string(),
}),
)
export const CreateFailedError = NamedError.create(
"WorktreeCreateFailedError",
z.object({
message: z.string(),
}),
)
export const StartCommandFailedError = NamedError.create(
"WorktreeStartCommandFailedError",
z.object({
message: z.string(),
}),
)
export const RemoveFailedError = NamedError.create(
"WorktreeRemoveFailedError",
z.object({
message: z.string(),
}),
)
export const ResetFailedError = NamedError.create(
"WorktreeResetFailedError",
z.object({
message: z.string(),
}),
)
const ADJECTIVES = [
"brave",
"calm",
"clever",
"cosmic",
"crisp",
"curious",
"eager",
"gentle",
"glowing",
"happy",
"hidden",
"jolly",
"kind",
"lucky",
"mighty",
"misty",
"neon",
"nimble",
"playful",
"proud",
"quick",
"quiet",
"shiny",
"silent",
"stellar",
"sunny",
"swift",
"tidy",
"witty",
] as const
const NOUNS = [
"cabin",
"cactus",
"canyon",
"circuit",
"comet",
"eagle",
"engine",
"falcon",
"forest",
"garden",
"harbor",
"island",
"knight",
"lagoon",
"meadow",
"moon",
"mountain",
"nebula",
"orchid",
"otter",
"panda",
"pixel",
"planet",
"river",
"rocket",
"sailor",
"squid",
"star",
"tiger",
"wizard",
"wolf",
] as const
function pick<const T extends readonly string[]>(list: T) {
return list[Math.floor(Math.random() * list.length)]
}
function slug(input: string) {
return input
.trim()
.toLowerCase()
.replace(/[^a-z0-9]+/g, "-")
.replace(/^-+/, "")
.replace(/-+$/, "")
}
function randomName() {
return `${pick(ADJECTIVES)}-${pick(NOUNS)}`
}
async function exists(target: string) {
return fs
.stat(target)
.then(() => true)
.catch(() => false)
}
function outputText(input: Uint8Array | undefined) {
if (!input?.length) return ""
return new TextDecoder().decode(input).trim()
}
function errorText(result: { stdout?: Uint8Array; stderr?: Uint8Array }) {
return [outputText(result.stderr), outputText(result.stdout)].filter(Boolean).join("\n")
}
function failed(result: { stdout?: Uint8Array; stderr?: Uint8Array }) {
return [outputText(result.stderr), outputText(result.stdout)].filter(Boolean).flatMap((chunk) =>
chunk
.split("\n")
.map((line) => line.trim())
.flatMap((line) => {
const match = line.match(/^warning:\s+failed to remove\s+(.+):\s+/i)
if (!match) return []
const value = match[1]?.trim().replace(/^['"]|['"]$/g, "")
if (!value) return []
return [value]
}),
)
}
async function prune(root: string, entries: string[]) {
const base = await canonical(root)
await Promise.all(
entries.map(async (entry) => {
const target = await canonical(path.resolve(root, entry))
if (target === base) return
if (!target.startsWith(`${base}${path.sep}`)) return
await fs.rm(target, { recursive: true, force: true }).catch(() => undefined)
}),
)
}
async function sweep(root: string) {
const first = await git(["clean", "-ffdx"], { cwd: root })
if (first.exitCode === 0) return first
const entries = failed(first)
if (!entries.length) return first
await prune(root, entries)
return git(["clean", "-ffdx"], { cwd: root })
}
async function canonical(input: string) {
const abs = path.resolve(input)
const real = await fs.realpath(abs).catch(() => abs)
const normalized = path.normalize(real)
return process.platform === "win32" ? normalized.toLowerCase() : normalized
}
async function candidate(root: string, base?: string) {
for (const attempt of Array.from({ length: 26 }, (_, i) => i)) {
const name = base ? (attempt === 0 ? base : `${base}-${randomName()}`) : randomName()
const branch = `opencode/${name}`
const directory = path.join(root, name)
if (await exists(directory)) continue
const ref = `refs/heads/${branch}`
const branchCheck = await git(["show-ref", "--verify", "--quiet", ref], {
cwd: Instance.worktree,
})
if (branchCheck.exitCode === 0) continue
return Info.parse({ name, branch, directory })
}
throw new NameGenerationFailedError({ message: "Failed to generate a unique worktree name" })
}
async function runStartCommand(directory: string, cmd: string) {
if (process.platform === "win32") {
return Process.run(["cmd", "/c", cmd], { cwd: directory, nothrow: true })
}
return Process.run(["bash", "-lc", cmd], { cwd: directory, nothrow: true })
}
type StartKind = "project" | "worktree"
async function runStartScript(directory: string, cmd: string, kind: StartKind) {
const text = cmd.trim()
if (!text) return true
const ran = await runStartCommand(directory, text)
if (ran.code === 0) return true
log.error("worktree start command failed", {
kind,
directory,
message: errorText(ran),
})
return false
}
async function runStartScripts(directory: string, input: { projectID: string; extra?: string }) {
const row = Database.use((db) => db.select().from(ProjectTable).where(eq(ProjectTable.id, input.projectID)).get())
const project = row ? Project.fromRow(row) : undefined
const startup = project?.commands?.start?.trim() ?? ""
const ok = await runStartScript(directory, startup, "project")
if (!ok) return false
const extra = input.extra ?? ""
await runStartScript(directory, extra, "worktree")
return true
}
function queueStartScripts(directory: string, input: { projectID: string; extra?: string }) {
setTimeout(() => {
const start = async () => {
await runStartScripts(directory, input)
}
void start().catch((error) => {
log.error("worktree start task failed", { directory, error })
})
}, 0)
}
export async function makeWorktreeInfo(name?: string): Promise<Info> {
if (Instance.project.vcs !== "git") {
throw new NotGitError({ message: "Worktrees are only supported for git projects" })
}
const root = path.join(Global.Path.data, "worktree", Instance.project.id)
await fs.mkdir(root, { recursive: true })
const base = name ? slug(name) : ""
return candidate(root, base || undefined)
}
export async function createFromInfo(info: Info, startCommand?: string) {
const created = await git(["worktree", "add", "--no-checkout", "-b", info.branch, info.directory], {
cwd: Instance.worktree,
})
if (created.exitCode !== 0) {
throw new CreateFailedError({ message: errorText(created) || "Failed to create git worktree" })
}
await Project.addSandbox(Instance.project.id, info.directory).catch(() => undefined)
const projectID = Instance.project.id
const extra = startCommand?.trim()
return () => {
const start = async () => {
const populated = await git(["reset", "--hard"], { cwd: info.directory })
if (populated.exitCode !== 0) {
const message = errorText(populated) || "Failed to populate worktree"
log.error("worktree checkout failed", { directory: info.directory, message })
GlobalBus.emit("event", {
directory: info.directory,
payload: {
type: Event.Failed.type,
properties: {
message,
},
},
})
return
}
const booted = await Instance.provide({
directory: info.directory,
init: InstanceBootstrap,
fn: () => undefined,
})
.then(() => true)
.catch((error) => {
const message = error instanceof Error ? error.message : String(error)
log.error("worktree bootstrap failed", { directory: info.directory, message })
GlobalBus.emit("event", {
directory: info.directory,
payload: {
type: Event.Failed.type,
properties: {
message,
},
},
})
return false
})
if (!booted) return
GlobalBus.emit("event", {
directory: info.directory,
payload: {
type: Event.Ready.type,
properties: {
name: info.name,
branch: info.branch,
},
},
})
await runStartScripts(info.directory, { projectID, extra })
}
return start().catch((error) => {
log.error("worktree start task failed", { directory: info.directory, error })
})
}
}
export const create = fn(CreateInput.optional(), async (input) => {
const info = await makeWorktreeInfo(input?.name)
const bootstrap = await createFromInfo(info, input?.startCommand)
// This is needed due to how worktrees currently work in the
// desktop app
setTimeout(() => {
bootstrap()
}, 0)
return info
})
export const remove = fn(RemoveInput, async (input) => {
if (Instance.project.vcs !== "git") {
throw new NotGitError({ message: "Worktrees are only supported for git projects" })
}
const directory = await canonical(input.directory)
const locate = async (stdout: Uint8Array | undefined) => {
const lines = outputText(stdout)
.split("\n")
.map((line) => line.trim())
const entries = lines.reduce<{ path?: string; branch?: string }[]>((acc, line) => {
if (!line) return acc
if (line.startsWith("worktree ")) {
acc.push({ path: line.slice("worktree ".length).trim() })
return acc
}
const current = acc[acc.length - 1]
if (!current) return acc
if (line.startsWith("branch ")) {
current.branch = line.slice("branch ".length).trim()
}
return acc
}, [])
return (async () => {
for (const item of entries) {
if (!item.path) continue
const key = await canonical(item.path)
if (key === directory) return item
}
})()
}
const clean = (target: string) =>
fs
.rm(target, {
recursive: true,
force: true,
maxRetries: 5,
retryDelay: 100,
})
.catch((error) => {
const message = error instanceof Error ? error.message : String(error)
throw new RemoveFailedError({ message: message || "Failed to remove git worktree directory" })
})
const stop = async (target: string) => {
if (!(await exists(target))) return
await git(["fsmonitor--daemon", "stop"], { cwd: target })
}
const list = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
if (list.exitCode !== 0) {
throw new RemoveFailedError({ message: errorText(list) || "Failed to read git worktrees" })
}
const entry = await locate(list.stdout)
if (!entry?.path) {
const directoryExists = await exists(directory)
if (directoryExists) {
await stop(directory)
await clean(directory)
}
return true
}
await stop(entry.path)
const removed = await git(["worktree", "remove", "--force", entry.path], {
cwd: Instance.worktree,
})
if (removed.exitCode !== 0) {
const next = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
if (next.exitCode !== 0) {
throw new RemoveFailedError({
message: errorText(removed) || errorText(next) || "Failed to remove git worktree",
})
}
const stale = await locate(next.stdout)
if (stale?.path) {
throw new RemoveFailedError({ message: errorText(removed) || "Failed to remove git worktree" })
}
}
await clean(entry.path)
const branch = entry.branch?.replace(/^refs\/heads\//, "")
if (branch) {
const deleted = await git(["branch", "-D", branch], { cwd: Instance.worktree })
if (deleted.exitCode !== 0) {
throw new RemoveFailedError({ message: errorText(deleted) || "Failed to delete worktree branch" })
}
}
return true
})
export const reset = fn(ResetInput, async (input) => {
if (Instance.project.vcs !== "git") {
throw new NotGitError({ message: "Worktrees are only supported for git projects" })
}
const directory = await canonical(input.directory)
const primary = await canonical(Instance.worktree)
if (directory === primary) {
throw new ResetFailedError({ message: "Cannot reset the primary workspace" })
}
const list = await git(["worktree", "list", "--porcelain"], { cwd: Instance.worktree })
if (list.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(list) || "Failed to read git worktrees" })
}
const lines = outputText(list.stdout)
.split("\n")
.map((line) => line.trim())
const entries = lines.reduce<{ path?: string; branch?: string }[]>((acc, line) => {
if (!line) return acc
if (line.startsWith("worktree ")) {
acc.push({ path: line.slice("worktree ".length).trim() })
return acc
}
const current = acc[acc.length - 1]
if (!current) return acc
if (line.startsWith("branch ")) {
current.branch = line.slice("branch ".length).trim()
}
return acc
}, [])
const entry = await (async () => {
for (const item of entries) {
if (!item.path) continue
const key = await canonical(item.path)
if (key === directory) return item
}
})()
if (!entry?.path) {
throw new ResetFailedError({ message: "Worktree not found" })
}
const remoteList = await git(["remote"], { cwd: Instance.worktree })
if (remoteList.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(remoteList) || "Failed to list git remotes" })
}
const remotes = outputText(remoteList.stdout)
.split("\n")
.map((line) => line.trim())
.filter(Boolean)
const remote = remotes.includes("origin")
? "origin"
: remotes.length === 1
? remotes[0]
: remotes.includes("upstream")
? "upstream"
: ""
const remoteHead = remote
? await git(["symbolic-ref", `refs/remotes/${remote}/HEAD`], { cwd: Instance.worktree })
: { exitCode: 1, stdout: undefined, stderr: undefined }
const remoteRef = remoteHead.exitCode === 0 ? outputText(remoteHead.stdout) : ""
const remoteTarget = remoteRef ? remoteRef.replace(/^refs\/remotes\//, "") : ""
const remoteBranch = remote && remoteTarget.startsWith(`${remote}/`) ? remoteTarget.slice(`${remote}/`.length) : ""
const mainCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/main"], {
cwd: Instance.worktree,
})
const masterCheck = await git(["show-ref", "--verify", "--quiet", "refs/heads/master"], {
cwd: Instance.worktree,
})
const localBranch = mainCheck.exitCode === 0 ? "main" : masterCheck.exitCode === 0 ? "master" : ""
const target = remoteBranch ? `${remote}/${remoteBranch}` : localBranch
if (!target) {
throw new ResetFailedError({ message: "Default branch not found" })
}
if (remoteBranch) {
const fetch = await git(["fetch", remote, remoteBranch], { cwd: Instance.worktree })
if (fetch.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(fetch) || `Failed to fetch ${target}` })
}
}
if (!entry.path) {
throw new ResetFailedError({ message: "Worktree path not found" })
}
const worktreePath = entry.path
const resetToTarget = await git(["reset", "--hard", target], { cwd: worktreePath })
if (resetToTarget.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(resetToTarget) || "Failed to reset worktree to target" })
}
const clean = await sweep(worktreePath)
if (clean.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(clean) || "Failed to clean worktree" })
}
const update = await git(["submodule", "update", "--init", "--recursive", "--force"], { cwd: worktreePath })
if (update.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(update) || "Failed to update submodules" })
}
const subReset = await git(["submodule", "foreach", "--recursive", "git", "reset", "--hard"], {
cwd: worktreePath,
})
if (subReset.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(subReset) || "Failed to reset submodules" })
}
const subClean = await git(["submodule", "foreach", "--recursive", "git", "clean", "-fdx"], {
cwd: worktreePath,
})
if (subClean.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(subClean) || "Failed to clean submodules" })
}
const status = await git(["-c", "core.fsmonitor=false", "status", "--porcelain=v1"], { cwd: worktreePath })
if (status.exitCode !== 0) {
throw new ResetFailedError({ message: errorText(status) || "Failed to read git status" })
}
const dirty = outputText(status.stdout)
if (dirty) {
throw new ResetFailedError({ message: `Worktree reset left local changes:\n${dirty}` })
}
const projectID = Instance.project.id
queueStartScripts(worktreePath, { projectID })
return true
})
}