fix(http): derive the template name from a digest of the whole URL by MFA-G · Pull Request #279 · unjs/giget

MFA-G · 2026-08-26T07:59:06Z

Problem

The http provider names a template ${basename}-${url.href.slice(0, 8)}:

https://github.com/unjs/giget/blob/main/src/providers.ts#L35

For an absolute URL the first eight characters are always the scheme and separator — https:// — so the suffix carries no information about which URL it came from. Two tarballs that share a basename get the same name:

import { http } from "giget";

await http("https://a.example.com/x/template.tar.gz", {}); // name: template.tar.gz-https://
await http("https://b.example.com/y/template.tar.gz", {}); // name: template.tar.gz-https://

That matters because downloadTemplate derives the cache path from the name:

const temporaryDirectory = resolve(cacheDirectory(), providerName, template.name);
const tarPath = resolve(temporaryDirectory, (template.version || template.name) + ".tar.gz");

version is "" for this provider, so both URLs resolve to the same tarPath. Since the etag check in download() is per-file, the second URL is compared against the first URL's etag — and with --offline / --prefer-offline (or when the network call fails and the cached copy is used) the wrong template is extracted outright.

The suffix is also lost to sanitization: downloadTemplate strips everything outside [\da-z-], turning https:// into https--- for every http-provider template.

Fix

Hash the full URL and keep eight hex characters. Hex digits survive the sanitization, and the name stays stable for a given URL, so existing caches keep working per-URL.

Test plan

test/providers.test.ts: three cases covering different hosts, different paths on the same host, and name stability + the character class. All three fail on main (expected 'https://' to match /^[\da-f]{8}$/) and pass with the fix.
pnpm exec vitest run test/providers.test.ts test/utils.test.ts test/git.test.ts — 51 passed.
pnpm lint (oxlint + oxfmt) and pnpm test:types — clean.
Full vitest run: 60 passed, 1 failed — getgit.test.ts > clone unjs/template using custom provider that returns stream fails with TAR_BAD_ARCHIVE on unmodified main here too, so it is a pre-existing network-backed failure and not from this change.

Summary by CodeRabbit

Bug Fixes
- Improved HTTP template caching to generate unique, consistent names from complete URLs.
- Prevented naming conflicts between URLs that share the same beginning.
- Ensured generated cache names use safe eight-character hexadecimal identifiers.

The `http` provider built the template name as `${basename}-${url.href.slice(0, 8)}`, but the first eight characters of an absolute URL are always the scheme and separator ("https://"), so the suffix carried no information about the URL. Two different tarballs sharing a basename therefore produced the same name — and since `downloadTemplate` derives the cache path from it (`<cache>/<provider>/<name>/<version>.tar.gz`), the second download reused the first one's cached tarball: http("https://a.example.com/x/template.tar.gz") // template.tar.gz-https:// http("https://b.example.com/y/template.tar.gz") // template.tar.gz-https:// Hash the full URL instead and keep eight hex characters. Hex digits survive the `[^\da-z-]` sanitization `downloadTemplate` applies to the name, whereas the previous suffix was reduced to "https---".

coderabbitai · 2026-08-26T07:59:25Z

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test/providers.test.ts

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📝 Walkthrough

Walkthrough

The HTTP provider now uses the first eight hexadecimal characters of a full URL’s SHA-256 digest in cache names. Tests mock network requests and verify unique, deterministic, sanitization-safe names.

Changes

HTTP cache naming

Layer / File(s)	Summary
Digest-based HTTP cache names `src/providers.ts`, `test/providers.test.ts`	The HTTP provider derives cache name suffixes from full URL digests. Mocked fetch tests cover distinct URLs, stable names, and eight-character hexadecimal suffixes.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 296c7

The change gives HTTP templates stable per-URL cache names, preventing collisions between different tarballs while preserving the existing naming flow. No actionable merge-blocking risk remains after normal checks and review.

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Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: deriving HTTP template names from a digest of the complete URL to prevent collisions.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.
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Actionable comments posted: 1

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Inline comments:
In `@test/providers.test.ts`:
- Around line 5-29: Stub the HEAD request used by the http provider tests so
they do not call the live sendFetch path or receive a Content-Disposition
filename. Update the test setup around http and sendFetch to return a
deterministic response without a filename, preserving the existing assertions
for distinct and stable name derivation.

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src/providers.ts
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MFA-G · 2026-08-26T13:15:44Z

Valid catch — fixed in 296c757.

The tests previously relied on the HEAD request failing offline. That is not deterministic: in an environment with network access, a response carrying content-disposition: filename=... would override name and break the "template.tar.gz-" prefix assertion.

test/providers.test.ts now mocks ../src/_utils.ts, keeping every real export and replacing only sendFetch with a stub returning new Response("", { headers: { "content-type": "application/gzip" } }) — not JSON, no filename header — so the name stays URL-derived, which is what these tests are about.

I verified the mock is really applied (not just passing by accident) by temporarily adding a content-disposition: filename="MOCKED.tar.gz" header to the stub and asserting the derived name became MOCKED-<digest>; it did.

pnpm vitest run test/providers.test.ts → 10 passed. pnpm lint (oxlint + oxfmt) clean.

coderabbitai Bot reviewed Aug 26, 2026

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Comment thread test/providers.test.ts

test(providers): stub the HEAD request in the http provider tests

296c757

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fix(http): derive the template name from a digest of the whole URL - #279

fix(http): derive the template name from a digest of the whole URL#279
MFA-G wants to merge 2 commits into
unjs:mainfrom
MFA-G:fix/http-provider-name-collision

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MFA-G commented Aug 26, 2026 •

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