global: Replace trivial cases of deprecated `ioutil.ReadDir()`

With Go 1.16, the ioutil package was deprecated. In addition to being
moved into the os package, `ioutil.ReadDir()` was also changed to not
stat(3P) all dir entries anymore. As a result, the caller now has to
do so manually. This is a performance improvement in some cases where
the caller didn't require any of the file information, but really only
wanted to read the directory's entries.

Adapt trivial usecases of `ioutil.ReadDir()` which do not require this
information with usage of `os.ReadDir()`. This leaves a few callsites of
the old `ioutil.ReadDir()` function for future conversion.

1 files changed, 1 insertions, 2 deletions

diff --git a/proto/go/internal/cmd/protoc-gen-gitaly/main.go b/proto/go/internal/cmd/protoc-gen-gitaly/main.go
index a364b68ee..efe8a312e 100644
--- a/proto/go/internal/cmd/protoc-gen-gitaly/main.go
+++ b/proto/go/internal/cmd/protoc-gen-gitaly/main.go
@@ -55,7 +55,6 @@ import (
 	"fmt"
 	"go/format"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -156,7 +155,7 @@ func generateProtolistGo(req *pluginpb.CodeGeneratorRequest) error {
 		return fmt.Errorf("failed to get absolute path for %s: %v", gitalyProtoDir, err)
 	}
 
-	files, err := ioutil.ReadDir(gitalyProtoDir)
+	files, err := os.ReadDir(gitalyProtoDir)
 	if err != nil {
 		return fmt.Errorf("failed to read %s: %v", gitalyProtoDir, err)
 	}