YeonGyu-Kim
7accb53cbb
On Windows, renameSync fails with EPERM/EACCES when the target file already exists. Fall back to unlink + rename on Windows permission errors while preserving atomic semantics on other platforms. 🤖 Generated with OhMyOpenCode assistance https://github.com/code-yeongyu/oh-my-opencode
29 lines
805 B
TypeScript
29 lines
805 B
TypeScript
import { closeSync, fsyncSync, openSync, renameSync, unlinkSync, writeFileSync } from "node:fs"
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export function writeFileAtomically(filePath: string, content: string): void {
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const tempPath = `${filePath}.tmp`
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writeFileSync(tempPath, content, "utf-8")
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const tempFileDescriptor = openSync(tempPath, "r")
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try {
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fsyncSync(tempFileDescriptor)
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} finally {
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closeSync(tempFileDescriptor)
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}
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try {
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renameSync(tempPath, filePath)
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} catch (error) {
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const isWindows = process.platform === "win32"
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const isPermissionError =
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error instanceof Error &&
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(error.message.includes("EPERM") || error.message.includes("EACCES"))
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if (isWindows && isPermissionError) {
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unlinkSync(filePath)
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renameSync(tempPath, filePath)
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} else {
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throw error
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}
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}
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}
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