Merge remote-tracking branch 'origin/dev' into feature/configurable-agent-ordering

This commit is contained in:
YeonGyu-Kim
2026-05-08 16:08:26 +09:00
23 changed files with 890 additions and 96 deletions
@@ -0,0 +1,56 @@
import { describe, expect, it } from "bun:test"
import {
classifyPathEnvironment,
describePathClassification,
} from "./classify-path-environment"
describe("classifyPathEnvironment", () => {
it("classifies macOS iCloud path as icloud", () => {
expect(
classifyPathEnvironment(
"/Users/x/Library/Mobile Documents/com~apple~CloudDocs/project/file.txt",
),
).toBe("icloud")
})
it("classifies OneDrive path on unix style", () => {
expect(classifyPathEnvironment("/Users/x/OneDrive/foo")).toBe("onedrive")
})
it("classifies OneDrive path on windows style", () => {
expect(classifyPathEnvironment("C:\\Users\\x\\OneDrive\\foo")).toBe("onedrive")
})
it("classifies macOS Desktop path as desktop-sync", () => {
expect(classifyPathEnvironment("/Users/x/Desktop/foo")).toBe("desktop-sync")
})
it("classifies /Volumes path as network-drive", () => {
expect(classifyPathEnvironment("/Volumes/NetworkShare/foo")).toBe("network-drive")
})
it("classifies random path as unknown", () => {
expect(classifyPathEnvironment("/tmp/foo")).toBe("unknown")
})
it("classifies empty string as unknown", () => {
expect(classifyPathEnvironment("")).toBe("unknown")
})
it("matches OneDrive case-insensitively", () => {
expect(classifyPathEnvironment("/Users/x/oNeDrIvE/foo")).toBe("onedrive")
})
})
describe("describePathClassification", () => {
it("returns human-readable descriptions", () => {
expect(describePathClassification("icloud")).toBe("iCloud Drive")
expect(describePathClassification("onedrive")).toBe("OneDrive")
expect(describePathClassification("desktop-sync")).toBe("Desktop sync (macOS)")
expect(describePathClassification("network-drive")).toBe("Network drive")
expect(describePathClassification("unknown")).toBe(
"filesystem that does not support fsync",
)
})
})
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import { homedir } from "node:os"
import path from "node:path"
export type PathClassification =
| "icloud"
| "onedrive"
| "desktop-sync"
| "network-drive"
| "unknown"
function normalizeInputPath(absolutePath: string): string {
return absolutePath.replaceAll("\\", "/")
}
function isUnderPath(normalizedPath: string, normalizedParentPath: string): boolean {
return normalizedPath === normalizedParentPath || normalizedPath.startsWith(`${normalizedParentPath}/`)
}
export function classifyPathEnvironment(absolutePath: string): PathClassification {
if (absolutePath.length === 0) return "unknown"
const normalizedPath = normalizeInputPath(absolutePath)
const lowercasePath = normalizedPath.toLowerCase()
if (lowercasePath.includes("/onedrive") || lowercasePath.includes("/onedrive/")) {
return "onedrive"
}
if (normalizedPath.includes("/Library/Mobile Documents/")) {
return "icloud"
}
if (isUnderPath(normalizedPath, "/Volumes")) {
return "network-drive"
}
if (
normalizedPath.startsWith("/Users/")
&& (normalizedPath.includes("/Desktop/") || normalizedPath.endsWith("/Desktop")
|| normalizedPath.includes("/Documents/") || normalizedPath.endsWith("/Documents"))
) {
return "desktop-sync"
}
const normalizedHome = normalizeInputPath(homedir())
const desktopPath = normalizeInputPath(path.join(normalizedHome, "Desktop"))
const documentsPath = normalizeInputPath(path.join(normalizedHome, "Documents"))
if (isUnderPath(normalizedPath, desktopPath) || isUnderPath(normalizedPath, documentsPath)) {
return "desktop-sync"
}
return "unknown"
}
export function describePathClassification(pathClassification: PathClassification): string {
switch (pathClassification) {
case "icloud":
return "iCloud Drive"
case "onedrive":
return "OneDrive"
case "desktop-sync":
return "Desktop sync (macOS)"
case "network-drive":
return "Network drive"
case "unknown":
return "filesystem that does not support fsync"
}
}
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import { beforeEach, describe, expect, it } from "bun:test"
import {
clearAllSkips,
drainSkipsAfter,
recordFsyncSkip,
} from "./fsync-skip-tracker"
type PathClassification =
| "icloud"
| "onedrive"
| "desktop-sync"
| "network-drive"
| "unknown"
function recordSkip(index: number, pathClassification: PathClassification = "unknown"): void {
recordFsyncSkip({
filePath: `/tmp/file-${index}.txt`,
contextLabel: `atomicWrite:/tmp/file-${index}.txt`,
errorCode: "EPERM",
message: "operation not permitted",
pathClassification,
})
}
describe("fsync-skip-tracker", () => {
beforeEach(() => {
clearAllSkips()
})
it("recordFsyncSkip adds entry with timestamp", () => {
const before = Date.now()
recordSkip(1)
const entries = drainSkipsAfter(0)
expect(entries).toHaveLength(1)
expect(entries[0]?.filePath).toBe("/tmp/file-1.txt")
expect(entries[0]?.timestamp).toBeGreaterThanOrEqual(before)
})
it("drainSkipsAfter(timestamp) returns entries strictly after the timestamp", async () => {
recordSkip(1)
const firstTimestamp = Date.now()
await Bun.sleep(2)
recordSkip(2)
const drained = drainSkipsAfter(firstTimestamp)
expect(drained).toHaveLength(1)
expect(drained[0]?.filePath).toBe("/tmp/file-2.txt")
})
it("drainSkipsAfter removes drained entries from buffer", () => {
recordSkip(1)
recordSkip(2)
const drained = drainSkipsAfter(0)
expect(drained).toHaveLength(2)
expect(drainSkipsAfter(0)).toEqual([])
})
it("buffer is bounded to max 200 entries and drops oldest on overflow", () => {
for (let index = 1; index <= 205; index += 1) {
recordSkip(index)
}
const drained = drainSkipsAfter(0)
expect(drained).toHaveLength(200)
expect(drained[0]?.filePath).toBe("/tmp/file-6.txt")
expect(drained[199]?.filePath).toBe("/tmp/file-205.txt")
})
it("multiple records with same path are kept", () => {
recordSkip(1)
recordFsyncSkip({
filePath: "/tmp/file-1.txt",
contextLabel: "acquireLock:/tmp/file-1.txt",
errorCode: "EPERM",
message: "second",
pathClassification: "unknown",
})
const drained = drainSkipsAfter(0)
expect(drained).toHaveLength(2)
expect(drained[0]?.filePath).toBe("/tmp/file-1.txt")
expect(drained[1]?.filePath).toBe("/tmp/file-1.txt")
})
it("drainSkipsAfter(0) returns all entries", () => {
recordSkip(1)
recordSkip(2)
const drained = drainSkipsAfter(0)
expect(drained).toHaveLength(2)
})
it("empty buffer returns empty array", () => {
expect(drainSkipsAfter(0)).toEqual([])
})
})
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import type { PathClassification } from "./classify-path-environment"
export type FsyncSkipEntry = {
filePath: string
contextLabel: string
errorCode: string
message: string
pathClassification: PathClassification
timestamp: number
}
const MAX_SKIPS = 200
const fsyncSkips: FsyncSkipEntry[] = []
export function recordFsyncSkip(entry: Omit<FsyncSkipEntry, "timestamp">): void {
fsyncSkips.push({ ...entry, timestamp: Date.now() })
if (fsyncSkips.length > MAX_SKIPS) {
fsyncSkips.splice(0, fsyncSkips.length - MAX_SKIPS)
}
}
export function drainSkipsAfter(timestampMs: number): FsyncSkipEntry[] {
const drainedEntries: FsyncSkipEntry[] = []
const retainedEntries: FsyncSkipEntry[] = []
for (const entry of fsyncSkips) {
if (entry.timestamp > timestampMs) {
drainedEntries.push(entry)
continue
}
retainedEntries.push(entry)
}
fsyncSkips.splice(0, fsyncSkips.length, ...retainedEntries)
return drainedEntries
}
export function clearAllSkips(): void {
fsyncSkips.length = 0
}
@@ -0,0 +1,78 @@
import { describe, expect, it } from "bun:test"
import type { FsyncSkipEntry } from "./fsync-skip-tracker"
import { formatFsyncSkipWarning } from "./fsync-skip-warning-formatter"
function makeEntry(index: number, classification: FsyncSkipEntry["pathClassification"]): FsyncSkipEntry {
return {
filePath: `/path/${index}`,
contextLabel: `atomicWrite:/path/${index}`,
errorCode: "EPERM",
message: "operation not permitted",
pathClassification: classification,
timestamp: 1000 + index,
}
}
describe("formatFsyncSkipWarning", () => {
it("returns empty string for zero entries", () => {
expect(formatFsyncSkipWarning([])).toBe("")
})
it("includes iCloud environment, path, and code for one entry", () => {
const warning = formatFsyncSkipWarning([makeEntry(1, "icloud")])
expect(warning).toContain("iCloud Drive")
expect(warning).toContain("/path/1")
expect(warning).toContain("EPERM")
})
it("shows all five paths when exactly five entries exist", () => {
const warning = formatFsyncSkipWarning([
makeEntry(1, "icloud"),
makeEntry(2, "icloud"),
makeEntry(3, "icloud"),
makeEntry(4, "icloud"),
makeEntry(5, "icloud"),
])
expect(warning).toContain("/path/1")
expect(warning).toContain("/path/5")
expect(warning).not.toContain("and 1 more")
})
it("shows five paths plus overflow summary when six entries exist", () => {
const warning = formatFsyncSkipWarning([
makeEntry(1, "icloud"),
makeEntry(2, "icloud"),
makeEntry(3, "icloud"),
makeEntry(4, "icloud"),
makeEntry(5, "icloud"),
makeEntry(6, "icloud"),
])
expect(warning).toContain("/path/5")
expect(warning).not.toContain("/path/6")
expect(warning).toContain("... and 1 more")
})
it("uses the most common classification when entries are mixed", () => {
const warning = formatFsyncSkipWarning([
makeEntry(1, "onedrive"),
makeEntry(2, "onedrive"),
makeEntry(3, "icloud"),
])
expect(warning).toContain("Detected environment: OneDrive")
})
it("matches required section format", () => {
const warning = formatFsyncSkipWarning([makeEntry(1, "unknown")])
expect(warning).toContain("[fsync-skipped] 1 write(s) bypassed fsync")
expect(warning).toContain("Affected paths:")
expect(warning).toContain("What this means:")
expect(warning).toContain("The write+rename succeeded")
expect(warning).not.toContain("Detected environment:")
expect(warning).toContain("filesystem does not support fsync")
})
})
@@ -0,0 +1,61 @@
import { describePathClassification } from "./classify-path-environment"
import type { FsyncSkipEntry } from "./fsync-skip-tracker"
const MAX_PATH_LINES = 5
function selectMostCommonClassification(
entries: FsyncSkipEntry[],
): FsyncSkipEntry["pathClassification"] {
const counts = new Map<FsyncSkipEntry["pathClassification"], number>()
for (const entry of entries) {
const currentCount = counts.get(entry.pathClassification) ?? 0
counts.set(entry.pathClassification, currentCount + 1)
}
let selected: FsyncSkipEntry["pathClassification"] = "unknown"
let selectedCount = -1
for (const [classification, count] of counts.entries()) {
if (count > selectedCount) {
selected = classification
selectedCount = count
}
}
return selected
}
export function formatFsyncSkipWarning(entries: FsyncSkipEntry[]): string {
if (entries.length === 0) return ""
const selectedClassification = selectMostCommonClassification(entries)
const selectedDescription = describePathClassification(selectedClassification)
const shownEntries = entries.slice(0, MAX_PATH_LINES)
const hiddenCount = Math.max(entries.length - shownEntries.length, 0)
const pathLines = shownEntries.map((entry) => ` - ${entry.filePath} (code: ${entry.errorCode})`)
if (hiddenCount > 0) {
pathLines.push(` ... and ${hiddenCount} more`)
}
const environmentLines = selectedClassification === "unknown"
? []
: [`Detected environment: ${selectedDescription}`]
const durabilityLine = selectedClassification === "unknown"
? " - Crash durability is best-effort because this filesystem does not support fsync."
: " - Crash durability is best-effort on this filesystem (this is normal for iCloud, OneDrive, network drives, antivirus-locked paths)."
return [
"---",
`[fsync-skipped] ${entries.length} write(s) bypassed fsync because the underlying filesystem rejected the syscall.`,
"",
...environmentLines,
"Affected paths:",
...pathLines,
"",
"What this means:",
" - The write+rename succeeded — the file is on disk, atomicity is preserved.",
durabilityLine,
" - No action required. Operation completed successfully.",
].join("\n")
}
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import { beforeEach, describe, expect, it } from "bun:test"
import { fsyncSync } from "node:fs"
import type { FileHandle } from "node:fs/promises"
import { clearAllSkips, drainSkipsAfter } from "./fsync-skip-tracker"
import { isToleratedFsyncError, tolerantFsync, tolerantFsyncSync } from "./tolerant-fsync"
function makeFsError(code: string, message?: string): NodeJS.ErrnoException {
const error = new Error(message ?? `${code}: simulated`) as NodeJS.ErrnoException
error.code = code
return error
}
function fakeHandleWithSyncError(error: NodeJS.ErrnoException): FileHandle {
return {
sync: async () => {
throw error
},
} as FileHandle
}
describe("isToleratedFsyncError", () => {
it("#given EPERM error #when checked #then returns true", () => {
expect(isToleratedFsyncError(makeFsError("EPERM"))).toBe(true)
})
it("#given EACCES error #when checked #then returns true", () => {
expect(isToleratedFsyncError(makeFsError("EACCES"))).toBe(true)
})
it("#given ENOTSUP error #when checked #then returns true", () => {
expect(isToleratedFsyncError(makeFsError("ENOTSUP"))).toBe(true)
})
it("#given EINVAL error #when checked #then returns true", () => {
expect(isToleratedFsyncError(makeFsError("EINVAL"))).toBe(true)
})
it("#given EIO error #when checked #then returns false", () => {
expect(isToleratedFsyncError(makeFsError("EIO"))).toBe(false)
})
it("#given ENOSPC error (disk full) #when checked #then returns false", () => {
expect(isToleratedFsyncError(makeFsError("ENOSPC"))).toBe(false)
})
it("#given EBADF error (bad fd) #when checked #then returns false", () => {
expect(isToleratedFsyncError(makeFsError("EBADF"))).toBe(false)
})
it("#given non-Error value #when checked #then returns false", () => {
expect(isToleratedFsyncError("EPERM string")).toBe(false)
expect(isToleratedFsyncError(null)).toBe(false)
expect(isToleratedFsyncError(undefined)).toBe(false)
expect(isToleratedFsyncError({ code: "EPERM" })).toBe(false)
})
it("#given Error without code #when checked #then returns false", () => {
expect(isToleratedFsyncError(new Error("no code"))).toBe(false)
})
})
describe("tolerantFsync (async)", () => {
beforeEach(() => {
clearAllSkips()
})
it("#given fsync throws EPERM #when called #then resolves without throwing", async () => {
const handle = fakeHandleWithSyncError(makeFsError("EPERM", "operation not permitted, fsync"))
await expect(tolerantFsync(handle, "test:async-eperm")).resolves.toBeUndefined()
})
it("#given fsync throws EACCES #when called #then resolves without throwing", async () => {
const handle = fakeHandleWithSyncError(makeFsError("EACCES"))
await expect(tolerantFsync(handle, "test:async-eacces")).resolves.toBeUndefined()
})
it("#given fsync throws ENOTSUP #when called #then resolves without throwing", async () => {
const handle = fakeHandleWithSyncError(makeFsError("ENOTSUP"))
await expect(tolerantFsync(handle, "test:async-enotsup")).resolves.toBeUndefined()
})
it("#given fsync throws EINVAL #when called #then resolves without throwing", async () => {
const handle = fakeHandleWithSyncError(makeFsError("EINVAL"))
await expect(tolerantFsync(handle, "test:async-einval")).resolves.toBeUndefined()
})
it("#given fsync throws EIO #when called #then propagates the error", async () => {
const handle = fakeHandleWithSyncError(makeFsError("EIO"))
await expect(tolerantFsync(handle, "test:async-eio")).rejects.toThrow("EIO: simulated")
})
it("#given fsync throws ENOSPC #when called #then propagates the error", async () => {
const handle = fakeHandleWithSyncError(makeFsError("ENOSPC"))
await expect(tolerantFsync(handle, "test:async-enospc")).rejects.toThrow("ENOSPC: simulated")
})
it("#given fsync succeeds #when called #then resolves and sync was invoked", async () => {
let syncCalled = false
const handle = {
sync: async () => {
syncCalled = true
},
} as FileHandle
await tolerantFsync(handle, "test:async-success")
expect(syncCalled).toBe(true)
})
it("#given fsync throws EPERM #when called #then tracker records one skip", async () => {
const handle = fakeHandleWithSyncError(makeFsError("EPERM", "operation not permitted, fsync"))
await tolerantFsync(handle, "atomicWrite:/Users/x/Library/Mobile Documents/com~apple~CloudDocs/file.txt")
const entries = drainSkipsAfter(0)
expect(entries).toHaveLength(1)
expect(entries[0]?.errorCode).toBe("EPERM")
})
it("#given fsync throws EIO #when called #then tracker remains empty", async () => {
const handle = fakeHandleWithSyncError(makeFsError("EIO"))
await expect(tolerantFsync(handle, "atomicWrite:/tmp/file.txt")).rejects.toThrow("EIO: simulated")
expect(drainSkipsAfter(0)).toHaveLength(0)
})
})
describe("tolerantFsyncSync (synchronous)", () => {
it("#given fsyncSync throws EPERM #when called #then returns without throwing", () => {
const fakeFsync = ((_fileDescriptor: number): void => {
throw makeFsError("EPERM", "operation not permitted, fsync")
}) as typeof fsyncSync
expect(() => tolerantFsyncSync(123, "test:sync-eperm", fakeFsync)).not.toThrow()
})
it("#given fsyncSync throws EACCES #when called #then returns without throwing", () => {
const fakeFsync = ((_fileDescriptor: number): void => {
throw makeFsError("EACCES")
}) as typeof fsyncSync
expect(() => tolerantFsyncSync(123, "test:sync-eacces", fakeFsync)).not.toThrow()
})
it("#given fsyncSync throws EIO #when called #then propagates the error", () => {
const fakeFsync = ((_fileDescriptor: number): void => {
throw makeFsError("EIO")
}) as typeof fsyncSync
expect(() => tolerantFsyncSync(123, "test:sync-eio", fakeFsync)).toThrow("EIO: simulated")
})
it("#given fsyncSync succeeds #when called #then returns and impl was invoked", () => {
let called = false
const fakeFsync = ((_fileDescriptor: number): void => {
called = true
}) as typeof fsyncSync
tolerantFsyncSync(123, "test:sync-success", fakeFsync)
expect(called).toBe(true)
})
})
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import { fsyncSync } from "node:fs"
import type { FileHandle } from "node:fs/promises"
import { classifyPathEnvironment } from "./classify-path-environment"
import { recordFsyncSkip } from "./fsync-skip-tracker"
import { log } from "./logger"
const TOLERATED_FSYNC_CODES: ReadonlySet<string> = new Set([
"EPERM",
"EACCES",
"ENOTSUP",
"EINVAL",
])
export function isToleratedFsyncError(error: unknown): boolean {
if (!(error instanceof Error)) return false
const code = (error as NodeJS.ErrnoException).code
return code !== undefined && TOLERATED_FSYNC_CODES.has(code)
}
function extractPathFromContextLabel(contextLabel: string): string {
const separatorIndex = contextLabel.indexOf(":")
if (separatorIndex < 0) return contextLabel
return contextLabel.slice(separatorIndex + 1)
}
export async function tolerantFsync(
fileHandle: FileHandle,
contextLabel: string,
): Promise<void> {
try {
await fileHandle.sync()
} catch (error) {
if (!isToleratedFsyncError(error)) throw error
const errorCode = (error as NodeJS.ErrnoException).code ?? "UNKNOWN"
const message = error instanceof Error ? error.message : String(error)
const filePath = extractPathFromContextLabel(contextLabel)
log("fsync skipped due to filesystem limitation", {
event: "fsync-skipped",
contextLabel,
code: errorCode,
message,
})
recordFsyncSkip({
filePath,
contextLabel,
errorCode,
message,
pathClassification: classifyPathEnvironment(filePath),
})
}
}
export function tolerantFsyncSync(
fileDescriptor: number,
contextLabel: string,
fsyncImpl: typeof fsyncSync = fsyncSync,
): void {
try {
fsyncImpl(fileDescriptor)
} catch (error) {
if (!isToleratedFsyncError(error)) throw error
const errorCode = (error as NodeJS.ErrnoException).code ?? "UNKNOWN"
const message = error instanceof Error ? error.message : String(error)
const filePath = extractPathFromContextLabel(contextLabel)
log("fsync skipped due to filesystem limitation", {
event: "fsync-skipped",
contextLabel,
code: errorCode,
message,
})
recordFsyncSkip({
filePath,
contextLabel,
errorCode,
message,
pathClassification: classifyPathEnvironment(filePath),
})
}
}
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@@ -51,4 +51,39 @@ describe("writeFileAtomically", () => {
// when/then
expect(() => writeFileAtomically(filePath, "content")).toThrow()
})
it("#given fsync fails with EPERM (synced folder) #when writeFileAtomically called #then write succeeds", () => {
// given
const filePath = join(testDir, "synced-folder.txt")
const content = "content from a synced folder where fsync is rejected"
// when
writeFileAtomically(filePath, content, {
fsyncSync: () => {
const error = new Error("EPERM: operation not permitted, fsync") as NodeJS.ErrnoException
error.code = "EPERM"
throw error
},
})
// then
expect(existsSync(filePath)).toBe(true)
expect(readFileSync(filePath, "utf-8")).toBe(content)
})
it("#given fsync fails with EIO (real I/O error) #when writeFileAtomically called #then propagates the error", () => {
// given
const filePath = join(testDir, "io-error.txt")
// when/then
expect(() =>
writeFileAtomically(filePath, "content", {
fsyncSync: () => {
const error = new Error("EIO: input/output error") as NodeJS.ErrnoException
error.code = "EIO"
throw error
},
}),
).toThrow("EIO")
})
})
+18 -5
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@@ -1,11 +1,24 @@
import { closeSync, fsyncSync, openSync, renameSync, unlinkSync, writeFileSync } from "node:fs"
import {
closeSync,
type fsyncSync as FsyncSync,
openSync,
renameSync,
unlinkSync,
writeFileSync,
} from "node:fs"
export function writeFileAtomically(filePath: string, content: string): void {
const tempPath = `${filePath}.tmp`
writeFileSync(tempPath, content, "utf-8")
import { tolerantFsyncSync } from "./tolerant-fsync"
export function writeFileAtomically(
filePath: string,
content: string,
deps: { fsyncSync?: typeof FsyncSync } = {},
): void {
const tempPath = `${filePath}.tmp`
writeFileSync(tempPath, content, "utf-8")
const tempFileDescriptor = openSync(tempPath, "r")
try {
fsyncSync(tempFileDescriptor)
tolerantFsyncSync(tempFileDescriptor, `writeFileAtomically:${filePath}`, deps.fsyncSync)
} finally {
closeSync(tempFileDescriptor)
}