Copy cmd from container-config

This change copies the code from container-config/cmd to
tools/container. This allows the code to be built and
added to the container image without additional refactoring.

As the configuration utilities are incorporated into the cmds
of the nvidia-container-toolkit, the code will be moved from tools.

Files copied from:

383587f766

Signed-off-by: Evan Lezar <elezar@nvidia.com>

tools/container/toolkit/runtime_test.go

@@ -0,0 +1,90 @@
+/**
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# 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.
+*/
+
+package main
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNvidiaContainerRuntimeInstallerWrapper(t *testing.T) {
+	r := newNvidiaContainerRuntimeInstaller()
+
+	const shebang = "#! /bin/sh"
+	const destFolder = "/dest/folder"
+	const dotfileName = "source.real"
+
+	buf := &bytes.Buffer{}
+
+	err := r.writeWrapperTo(buf, destFolder, dotfileName)
+	require.NoError(t, err)
+
+	expectedLines := []string{
+		shebang,
+		"",
+		"cat /proc/modules | grep -e \"^nvidia \" >/dev/null 2>&1",
+		"if [ \"${?}\" != \"0\" ]; then",
+		"	echo \"nvidia driver modules are not yet loaded, invoking runc directly\"",
+		"	exec runc \"$@\"",
+		"fi",
+		"",
+		"PATH=/dest/folder:$PATH \\",
+		"XDG_CONFIG_HOME=/dest/folder/.config \\",
+		"source.real \\",
+		"\t\"$@\"",
+		"",
+	}
+
+	exepectedContents := strings.Join(expectedLines, "\n")
+	require.Equal(t, exepectedContents, buf.String())
+}
+
+func TestExperimentalContainerRuntimeInstallerWrapper(t *testing.T) {
+	r := newNvidiaContainerRuntimeExperimentalInstaller("/some/root/usr/lib64")
+
+	const shebang = "#! /bin/sh"
+	const destFolder = "/dest/folder"
+	const dotfileName = "source.real"
+
+	buf := &bytes.Buffer{}
+
+	err := r.writeWrapperTo(buf, destFolder, dotfileName)
+	require.NoError(t, err)
+
+	expectedLines := []string{
+		shebang,
+		"",
+		"cat /proc/modules | grep -e \"^nvidia \" >/dev/null 2>&1",
+		"if [ \"${?}\" != \"0\" ]; then",
+		"	echo \"nvidia driver modules are not yet loaded, invoking runc directly\"",
+		"	exec runc \"$@\"",
+		"fi",
+		"",
+		"LD_LIBRARY_PATH=/some/root/usr/lib64:$LD_LIBRARY_PATH \\",
+		"PATH=/dest/folder:$PATH \\",
+		"XDG_CONFIG_HOME=/dest/folder/.config \\",
+		"source.real \\",
+		"\t\"$@\"",
+		"",
+	}
+
+	exepectedContents := strings.Join(expectedLines, "\n")
+	require.Equal(t, exepectedContents, buf.String())
+}