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denoland-deno/std/fs/ensure_link.ts
Nayeem Rahman f184332c09
BREAKING(std): reorganization (#5087)
* Prepend underscores to private modules
* Remove collectUint8Arrays() It would be a misuse of Deno.iter()'s result.
* Move std/_util/async.ts to std/async
* Move std/util/sha*.ts to std/hash
2020-05-09 08:34:47 -04:00

53 lines
1.6 KiB
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import * as path from "../path/mod.ts";
import { ensureDir, ensureDirSync } from "./ensure_dir.ts";
import { exists, existsSync } from "./exists.ts";
import { getFileInfoType } from "./_util.ts";
/**
* Ensures that the hard link exists.
* If the directory structure does not exist, it is created.
*
* @param src the source file path. Directory hard links are not allowed.
* @param dest the destination link path
*/
export async function ensureLink(src: string, dest: string): Promise<void> {
if (await exists(dest)) {
const destStatInfo = await Deno.lstat(dest);
const destFilePathType = getFileInfoType(destStatInfo);
if (destFilePathType !== "file") {
throw new Error(
`Ensure path exists, expected 'file', got '${destFilePathType}'`
);
}
return;
}
await ensureDir(path.dirname(dest));
await Deno.link(src, dest);
}
/**
* Ensures that the hard link exists.
* If the directory structure does not exist, it is created.
*
* @param src the source file path. Directory hard links are not allowed.
* @param dest the destination link path
*/
export function ensureLinkSync(src: string, dest: string): void {
if (existsSync(dest)) {
const destStatInfo = Deno.lstatSync(dest);
const destFilePathType = getFileInfoType(destStatInfo);
if (destFilePathType !== "file") {
throw new Error(
`Ensure path exists, expected 'file', got '${destFilePathType}'`
);
}
return;
}
ensureDirSync(path.dirname(dest));
Deno.linkSync(src, dest);
}