checkout/__test__/verify-lfs.sh
Andrew Klotz 579920382a Materialize LFS objects with an explicit git lfs checkout
Problem

On persistent/self-hosted runners that reuse a working directory across jobs, LFS-tracked files can be left as pointer files instead of real content when a lfs: false checkout precedes a lfs: true checkout of the same repo.

Sequence that triggers it:
 1. A lfs: false run sets GIT_LFS_SKIP_SMUDGE=1, so git checkout writes LFS files to the working tree as pointers.
 2. A later lfs: true run on the same worktree fetches the objects into .git/lfs, but git checkout sees the tree already at the target commit and does not re-smudge the already-present pointer files.

Result: the objects are in the local cache, but the working tree still contains pointers. The action relies on the smudge filter firing during git checkout to materialize content — which holds on a clean tree (GitHub-hosted runners) but not on a reused one.

Related: actions/checkout#270
2026-08-06 16:41:29 -07:00

17 lines
387 B
Bash
Executable File

#!/bin/bash
if [ ! -f "./lfs/regular-file.txt" ]; then
echo "Expected regular file does not exist"
exit 1
fi
if [ ! -f "./lfs/lfs-file.bin" ]; then
echo "Expected lfs file does not exist"
exit 1
fi
if head -n 1 "./lfs/lfs-file.bin" | grep -q "git-lfs.github.com/spec"; then
echo "Expected lfs file to be materialized, but it is still an LFS pointer"
exit 1
fi