Resolve LFS objects from git common dir

internal/pipeline/pipeline_test.go

@@ -1874,6 +1874,59 @@ func TestPlanHAKChunksPutsNewestAssetsInLastChunk(t *testing.T) {
 	}
 }
 
+func TestCollectLFSAssetInfoUsesGitCommonDirForWorktree(t *testing.T) {
+	if _, err := exec.LookPath("git"); err != nil {
+		t.Skip("git not available")
+	}
+
+	parent := t.TempDir()
+	repoRoot := filepath.Join(parent, "repo")
+	worktreeRoot := filepath.Join(parent, "worktree")
+	mustMkdir(t, repoRoot)
+	runGitTest(t, repoRoot, "init")
+	mustWriteFile(t, filepath.Join(repoRoot, "README.md"), "test\n")
+	runGitTest(t, repoRoot, "add", ".")
+	runGitTest(t, repoRoot, "config", "user.name", "Test User")
+	runGitTest(t, repoRoot, "config", "user.email", "test@example.com")
+	runGitTest(t, repoRoot, "commit", "-m", "initial")
+	runGitTest(t, repoRoot, "worktree", "add", worktreeRoot, "HEAD")
+
+	oid := strings.Repeat("a", 64)
+	assetRel := filepath.Join("core", "foo.mdl")
+	assetPath := filepath.Join(worktreeRoot, "assets", assetRel)
+	mustMkdir(t, filepath.Dir(assetPath))
+	mustWriteFile(t, assetPath, "version https://git-lfs.github.com/spec/v1\n"+"oid sha256:"+oid+"\n"+"size 5\n")
+
+	lfsObjectPath := filepath.Join(repoRoot, ".git", "lfs", "objects", oid[:2], oid[2:4], oid)
+	mustMkdir(t, filepath.Dir(lfsObjectPath))
+	mustWriteFile(t, lfsObjectPath, "model")
+
+	proj := &project.Project{
+		Root: worktreeRoot,
+		Config: project.Config{
+			Paths: project.PathConfig{Source: "src", Assets: "assets", Build: "build"},
+		},
+		Inventory: project.Inventory{
+			AssetFiles: []string{filepath.ToSlash(assetRel)},
+		},
+	}
+
+	infos, err := collectLFSAssetInfo(proj)
+	if err != nil {
+		t.Fatalf("collect lfs asset info: %v", err)
+	}
+	info, ok := infos[filepath.ToSlash(assetRel)]
+	if !ok {
+		t.Fatal("expected LFS asset info")
+	}
+	if got, want := info.ObjectPath, lfsObjectPath; got != want {
+		t.Fatalf("unexpected LFS object path:\ngot  %s\nwant %s", got, want)
+	}
+	if _, err := lfsPathResource(assetPath, info, true); err != nil {
+		t.Fatalf("expected worktree LFS object to resolve: %v", err)
+	}
+}
+
 func runGitCommitTest(t *testing.T, dir, timestamp, message string) {
 	t.Helper()
 	runGitTest(t, dir, "add", ".")