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import fs from "fs";
import path, { dirname } from "path";
import { tmpdir } from "os";
import child_process from "child_process";
if (process.env["DEBUG"] !== "1") {
console.debug = () => {};
}
export function join(...paths: (string | string[])[]): string {
return path.join(...paths.flat(2));
}
export function tmp(): string {
const path = fs.mkdtempSync(join(tmpdir(), "bun-"));
console.debug("tmp", path);
return path;
}
export function rm(path: string): void {
console.debug("rm", path);
try {
fs.rmSync(path, { recursive: true });
return;
} catch (error) {
console.debug("rmSync failed", error);
// Did not exist before Node.js v14.
// Attempt again with older, slower implementation.
}
let stats: fs.Stats;
try {
stats = fs.lstatSync(path);
} catch (error) {
console.debug("lstatSync failed", error);
// The file was likely deleted, so return early.
return;
}
if (!stats.isDirectory()) {
fs.unlinkSync(path);
return;
}
try {
fs.rmdirSync(path, { recursive: true });
return;
} catch (error) {
console.debug("rmdirSync failed", error);
// Recursive flag did not exist before Node.js X.
// Attempt again with older, slower implementation.
}
for (const filename of fs.readdirSync(path)) {
rm(join(path, filename));
}
fs.rmdirSync(path);
}
export function rename(path: string, newPath: string): void {
console.debug("rename", path, newPath);
try {
fs.renameSync(path, newPath);
return;
} catch (error) {
console.debug("renameSync failed", error);
// If there is an error, delete the new path and try again.
}
try {
rm(newPath);
} catch (error) {
console.debug("rm failed", error);
// The path could have been deleted already.
}
fs.renameSync(path, newPath);
}
export function write(
path: string,
content: string | ArrayBuffer | ArrayBufferView,
): void {
console.debug("write", path);
try {
fs.writeFileSync(path, content);
return;
} catch (error) {
console.debug("writeFileSync failed", error);
// If there is an error, ensure the parent directory
// exists and try again.
try {
fs.mkdirSync(dirname(path), { recursive: true });
} catch (error) {
console.debug("mkdirSync failed", error);
// The directory could have been created already.
}
fs.writeFileSync(path, content);
}
}
export function read(path: string): string {
console.debug("read", path);
return fs.readFileSync(path, "utf-8");
}
export function chmod(path: string, mode: fs.Mode): void {
console.debug("chmod", path, mode);
fs.chmodSync(path, mode);
}
export function spawn(
cmd: string,
args: string[],
options: child_process.SpawnOptions = {},
): {
exitCode: number;
stdout: string;
stderr: string;
} {
console.debug("spawn", [cmd, ...args].join(" "));
const { status, stdout, stderr } = child_process.spawnSync(cmd, args, {
stdio: "pipe",
encoding: "utf-8",
...options,
});
return {
exitCode: status ?? 1,
stdout,
stderr,
};
}
export type Response = {
readonly status: number;
arrayBuffer(): Promise<ArrayBuffer>;
json<T>(): Promise<T>;
};
export const fetch = "fetch" in globalThis ? webFetch : nodeFetch;
async function webFetch(url: string, assert?: boolean): Promise<Response> {
const response = await globalThis.fetch(url);
console.debug("fetch", url, response.status);
if (assert !== false && !isOk(response.status)) {
throw new Error(`${response.status}: ${url}`);
}
return response;
}
async function nodeFetch(url: string, assert?: boolean): Promise<Response> {
const { get } = await import("node:http");
return new Promise((resolve, reject) => {
get(url, (response) => {
console.debug("get", url, response.statusCode);
const status = response.statusCode ?? 501;
if (response.headers.location && isRedirect(status)) {
return nodeFetch(url).then(resolve, reject);
}
if (assert !== false && !isOk(status)) {
return reject(new Error(`${status}: ${url}`));
}
const body: Buffer[] = [];
response.on("data", (chunk) => {
body.push(chunk);
});
response.on("end", () => {
resolve({
status,
async arrayBuffer() {
return Buffer.concat(body).buffer as ArrayBuffer;
},
async json() {
const text = Buffer.concat(body).toString("utf-8");
return JSON.parse(text);
},
});
});
}).on("error", reject);
});
}
function isOk(status: number): boolean {
return status === 200;
}
function isRedirect(status: number): boolean {
switch (status) {
case 301: // Moved Permanently
case 308: // Permanent Redirect
case 302: // Found
case 307: // Temporary Redirect
case 303: // See Other
return true;
}
return false;
}
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