Fix gitfs tests

internal/forks/rsc.io/gitfs/fs.go

@@ -12,7 +12,6 @@ import (
 	hashpkg "hash"
 	"io"
 	"io/fs"
-	"log"
 	"runtime/debug"
 	"strings"
 	"time"
@@ -249,14 +248,14 @@ func (t *treeFS) Open(name string) (f fs.File, err error) {
 		}
 	}()
 
-	prefix := t.s.repo.root + "@" + t.commit.String()
-	log.Printf("name=%q, prefix=%q", name, prefix)
-	name = strings.TrimPrefix(name, prefix)
-	name = strings.TrimPrefix(name, "/")
-	if name == "" {
-		name = "."
+	if t.s.repo != nil {
+		prefix := t.s.repo.root + "@" + t.commit.String()
+		name = strings.TrimPrefix(name, prefix)
+		name = strings.TrimPrefix(name, "/")
+		if name == "" {
+			name = "."
+		}
 	}
-	log.Printf("cleaned=%q", name)
 
 	// Process each element in the slash-separated path, producing hash identified by name.
 	h := t.tree

internal/forks/rsc.io/gitfs/git_test.go

@@ -19,7 +19,7 @@ func TestGerrit(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	_, fsys, err := r.Clone("HEAD")
+	_, fsys, err := r.Clone(context.Background(), "HEAD")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -38,7 +38,7 @@ func TestGitHub(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	_, fsys, err := r.Clone("HEAD")
+	_, fsys, err := r.Clone(context.Background(), "HEAD")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -61,7 +61,7 @@ func TestPack(t *testing.T) {
 	}
 
 	h := Hash{0xf6, 0xf7, 0x39, 0x2a, 0x99, 0x9b, 0x3d, 0x75, 0xe2, 0x1c, 0xae, 0xe3, 0x3a, 0xeb, 0x6d, 0x01, 0x92, 0xe8, 0xdc, 0x6b}
-	tfs, err := s.Commit(h)
+	tfs, _, err := s.Commit(h)
 	if err != nil {
 		t.Fatal(err)
 	}