Repo cache
getRepoCache/invalidateRepoCache for isomorphic-git's per-repo packfile cache.
getRepoCache(ownerKey, repoName) / invalidateRepoCache(ownerKey, repoName)
import { getRepoCache, invalidateRepoCache } from 'git-edge';
const repo = { fs, gitdir, cache: getRepoCache('alice', 'blog') };isomorphic-git re-parses a packfile index from scratch on every
readTree/log/readObject call unless callers share a cache object
across calls — without one, an operation that touches many objects (walking
commit history, a deep diff) pays that parse cost hundreds of times in a
single request. getRepoCache returns a long-lived, per-repo object, keyed
`${ownerKey}/${repoName}`, created on first access and reused across
every subsequent call for that same repo within the process. At most 32 repos
are held at once; adding a new one evicts the least recently used. Nothing is
held on disk, so the cache is per-process and starts empty.
isomorphic-git treats this cache as opaque and safe to share indefinitely
— git objects are content-addressed and immutable, so there's no staleness
risk from reusing it across requests, only from reusing it across a repo
whose storage was rewritten out from under it.
Call invalidateRepoCache(ownerKey, repoName) after anything rewrites a
repo's storage independently of the process holding this cache — a rename, a
bulk resync, a repack that ran elsewhere — so stale parsed pack state can't
leak into the next read.
await renameRepo('alice', 'blog', 'blog-v2');
invalidateRepoCache('alice', 'blog');