Make test subpackage a separate module

Signed-off-by: apostasie <[email protected]>

Author: apostasie

go.mod

@@ -2,6 +2,8 @@ module github.com/containerd/nerdctl/v2
 
 go 1.22.7
 
+toolchain go1.24.0
+
 // FIXME:
 // github.com/docker/docker/pkg/sysinfo has been replaced by a fork kept under ./pkg2/sysinfo
 // as Moby is not going to move to containerd v2 anytime soon or fix these transient dependencies.

pkg/testutil/test/hack/make-lint-imports.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+#   Copyright The containerd Authors.
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+
+#       http://www.apache.org/licenses/LICENSE-2.0
+
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+# FIXME: goimports-reviser is currently broken when it comes to ./...
+# Specifically, it will ignore arguments, and will return exit 0 regardless
+# This here is a workaround, until they fix it upstream: https://github.com/incu6us/goimports-reviser/pull/157
+
+# shellcheck disable=SC2034,SC2015
+set -o errexit -o errtrace -o functrace -o nounset -o pipefail
+
+ex=0
+
+while read -r file; do
+  goimports-reviser -list-diff -set-exit-status -output stdout -company-prefixes "go.farcloser.world" "$file" >/dev/null 2>&1 || {
+    ex=$?
+    >&2 printf "Imports are not listed properly in %s. Consider calling make fix-imports.\n" "$file"
+  }
+done < <(find ./ -type f -name '*.go')
+
+exit "$ex"