fix: lint explicitly ignore various close errors (#1684)

Signed-off-by: Terry Howe <[email protected]>

Author: TerryHowe

cmd/oras/root/attach.go

@@ -145,7 +145,7 @@ func runAttach(cmd *cobra.Command, opts *attachOptions) error {
 	if err != nil {
 		return err
 	}
-	defer store.Close()
+	defer func() { _ = store.Close() }()
 
 	dst, err := opts.NewTarget(opts.Common, logger)
 	if err != nil {

cmd/oras/root/blob/fetch.go

@@ -148,7 +148,7 @@ func (opts *fetchBlobOptions) doFetch(ctx context.Context, src oras.ReadOnlyTarg
 	if err != nil {
 		return ocispec.Descriptor{}, err
 	}
-	defer rc.Close()
+	defer func() { _ = rc.Close() }()
 	vr := content.NewVerifyReader(rc, desc)
 
 	// outputs blob content if "--output -" is used

cmd/oras/root/blob/push.go

@@ -123,7 +123,7 @@ func pushBlob(cmd *cobra.Command, opts *pushBlobOptions) (err error) {
 	if err != nil {
 		return err
 	}
-	defer rc.Close()
+	defer func() { _ = rc.Close() }()
 
 	statusHandler, metadataHandler := display.NewBlobPushHandler(opts.Printer, opts.OutputDescriptor, opts.Pretty.Pretty, desc, opts.TTY)
 	if err := doPush(ctx, statusHandler, target, desc, rc); err != nil {

cmd/oras/root/manifest/index/update.go

@@ -105,7 +105,7 @@ Example - Update an index and output the index to stdout, auto push will be disa
 func updateIndex(cmd *cobra.Command, opts updateOptions) error {
 	// if no update flag is used, do nothing
 	if !updateFlagsUsed(cmd.Flags()) {
-		opts.Printer.Println("Nothing to update as no change is requested")
+		_ = opts.Printer.Println("Nothing to update as no change is requested")
 		return nil
 	}
 	ctx, logger := command.GetLogger(cmd, &opts.Common)

cmd/oras/root/push.go

@@ -186,7 +186,7 @@ func runPush(cmd *cobra.Command, opts *pushOptions) error {
 	if err != nil {
 		return err
 	}
-	defer store.Close()
+	defer func() { _ = store.Close() }()
 	if opts.manifestConfigRef != "" {
 		path, cfgMediaType, err := fileref.Parse(opts.manifestConfigRef, oras.MediaTypeUnknownConfig)
 		if err != nil {