actions/setup-bun
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feat: Check for existing bun before downloading

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Check for existing bun with same version number, if it exists we skip any futher actions. This avoids downloading cache or bun over the network.
This commit is contained in:
Erik Axel Nielsen 2025-09-15 11:35:00 +02:00
parent 22457c87c1
commit 8876d4f857
2 changed files with 149 additions and 114 deletions
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194
dist/setup/index.js generated vendored
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File diff suppressed because one or more lines are too long

69
src/action.ts
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@ -7,6 +7,7 @@ import {
symlinkSync,
renameSync,
copyFileSync,
existsSync,
} from "node:fs";
import { addPath, info, warning } from "@actions/core";
import { isFeatureAvailable, restoreCache } from "@actions/cache";
@ -73,27 +74,40 @@ export default async (options: Input): Promise<Output> => {
let revision: string | undefined;
let cacheHit = false;
if (cacheEnabled) {
const cacheKey = createHash("sha1").update(url).digest("base64");
const cacheRestored = await restoreCache([bunPath], cacheKey);
if (cacheRestored) {
revision = await getRevision(bunPath);
if (revision) {
cacheHit = true;
info(`Using a cached version of Bun: ${revision}`);
} else {
warning(
`Found a cached version of Bun: ${revision} (but it appears to be corrupted?)`,
);
}
// Check if Bun executable already exists and matches requested version
if (!options.customUrl && existsSync(bunPath)) {
const existingRevision = await getRevision(bunPath);
if (existingRevision && isVersionMatch(existingRevision, options.version)) {
revision = existingRevision;
cacheHit = true; // Treat as cache hit to avoid unnecessary network requests
info(`Using existing Bun installation: ${revision}`);
}
}
if (!cacheHit) {
info(`Downloading a new version of Bun: ${url}`);
// TODO: remove this, temporary fix for https://github.com/oven-sh/setup-bun/issues/73
revision = await retry(async () => await downloadBun(url, bunPath), 3);
if (!revision) {
if (cacheEnabled) {
const cacheKey = createHash("sha1").update(url).digest("base64");
const cacheRestored = await restoreCache([bunPath], cacheKey);
if (cacheRestored) {
revision = await getRevision(bunPath);
if (revision) {
cacheHit = true;
info(`Using a cached version of Bun: ${revision}`);
} else {
warning(
`Found a cached version of Bun: ${revision} (but it appears to be corrupted?)`,
);
}
}
}
if (!cacheHit) {
info(`Downloading a new version of Bun: ${url}`);
// TODO: remove this, temporary fix for https://github.com/oven-sh/setup-bun/issues/73
revision = await retry(async () => await downloadBun(url, bunPath), 3);
}
}
if (!revision) {
@ -122,6 +136,27 @@ export default async (options: Input): Promise<Output> => {
};
};
function isVersionMatch(
existingRevision: string,
requestedVersion?: string,
): boolean {
// If no version specified, default is "latest" - don't match existing
if (!requestedVersion) {
return false;
}
// Non-pinned versions should never match existing installations
if (/^(latest|canary|action)$/i.test(requestedVersion)) {
return false;
}
const [existingVersion] = existingRevision.split("+");
const normalizeVersion = (v: string) => v.replace(/^v/i, "");
return normalizeVersion(existingVersion) === normalizeVersion(requestedVersion);
}
async function downloadBun(
url: string,
bunPath: string,