Spaces:
Paused
Paused
File size: 3,790 Bytes
fb4d8fe | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | import type { ChildProcess, SpawnOptions } from "node:child_process";
import { spawn } from "node:child_process";
export type SpawnFallback = {
label: string;
options: SpawnOptions;
};
export type SpawnWithFallbackResult = {
child: ChildProcess;
usedFallback: boolean;
fallbackLabel?: string;
};
type SpawnWithFallbackParams = {
argv: string[];
options: SpawnOptions;
fallbacks?: SpawnFallback[];
spawnImpl?: typeof spawn;
retryCodes?: string[];
onFallback?: (err: unknown, fallback: SpawnFallback) => void;
};
const DEFAULT_RETRY_CODES = ["EBADF"];
export function resolveCommandStdio(params: {
hasInput: boolean;
preferInherit: boolean;
}): ["pipe" | "inherit" | "ignore", "pipe", "pipe"] {
const stdin = params.hasInput ? "pipe" : params.preferInherit ? "inherit" : "pipe";
return [stdin, "pipe", "pipe"];
}
export function formatSpawnError(err: unknown): string {
if (!(err instanceof Error)) {
return String(err);
}
const details = err as NodeJS.ErrnoException;
const parts: string[] = [];
const message = err.message?.trim();
if (message) {
parts.push(message);
}
if (details.code && !message?.includes(details.code)) {
parts.push(details.code);
}
if (details.syscall) {
parts.push(`syscall=${details.syscall}`);
}
if (typeof details.errno === "number") {
parts.push(`errno=${details.errno}`);
}
return parts.join(" ");
}
function shouldRetry(err: unknown, codes: string[]): boolean {
const code =
err && typeof err === "object" && "code" in err ? String((err as { code?: unknown }).code) : "";
return code.length > 0 && codes.includes(code);
}
async function spawnAndWaitForSpawn(
spawnImpl: typeof spawn,
argv: string[],
options: SpawnOptions,
): Promise<ChildProcess> {
const child = spawnImpl(argv[0], argv.slice(1), options);
return await new Promise((resolve, reject) => {
let settled = false;
const cleanup = () => {
child.removeListener("error", onError);
child.removeListener("spawn", onSpawn);
};
const finishResolve = () => {
if (settled) {
return;
}
settled = true;
cleanup();
resolve(child);
};
const onError = (err: unknown) => {
if (settled) {
return;
}
settled = true;
cleanup();
reject(err);
};
const onSpawn = () => {
finishResolve();
};
child.once("error", onError);
child.once("spawn", onSpawn);
// Ensure mocked spawns that never emit "spawn" don't stall.
process.nextTick(() => {
if (typeof child.pid === "number") {
finishResolve();
}
});
});
}
export async function spawnWithFallback(
params: SpawnWithFallbackParams,
): Promise<SpawnWithFallbackResult> {
const spawnImpl = params.spawnImpl ?? spawn;
const retryCodes = params.retryCodes ?? DEFAULT_RETRY_CODES;
const baseOptions = { ...params.options };
const fallbacks = params.fallbacks ?? [];
const attempts: Array<{ label?: string; options: SpawnOptions }> = [
{ options: baseOptions },
...fallbacks.map((fallback) => ({
label: fallback.label,
options: { ...baseOptions, ...fallback.options },
})),
];
let lastError: unknown;
for (let index = 0; index < attempts.length; index += 1) {
const attempt = attempts[index];
try {
const child = await spawnAndWaitForSpawn(spawnImpl, params.argv, attempt.options);
return {
child,
usedFallback: index > 0,
fallbackLabel: attempt.label,
};
} catch (err) {
lastError = err;
const nextFallback = fallbacks[index];
if (!nextFallback || !shouldRetry(err, retryCodes)) {
throw err;
}
params.onFallback?.(err, nextFallback);
}
}
throw lastError;
}
|