feat: add OS/Arch information into oras version

cmd/oras/root/version.go

@@ -58,6 +58,7 @@ func runVersion(printer *output.Printer) error {
 	items := [][]string{
 		{"Version", version.GetVersion()},
 		{"Go version", runtime.Version()},
+		{"OS/Arch", fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH)},
 	}
 	if version.GitCommit != "" {
 		items = append(items, []string{"Git commit", version.GitCommit})

test/e2e/suite/command/version_darwin.go

@@ -0,0 +1,31 @@
+//go:build darwin
+
+/*
+Copyright The ORAS 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.
+*/
+
+package command
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+	. "oras.land/oras/test/e2e/internal/utils"
+)
+
+var _ = Describe("ORAS darwin user:", func() {
+	When("checking oras version", func() {
+		It("should run version command and show OS/Arch information", func() {
+			ORAS("version").MatchKeyWords("OS/Arch:", "darwin/").Exec()
+		})
+	})
+})

test/e2e/suite/command/version_linux.go

@@ -0,0 +1,31 @@
+//go:build linux
+
+/*
+Copyright The ORAS 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.
+*/
+
+package command
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+	. "oras.land/oras/test/e2e/internal/utils"
+)
+
+var _ = Describe("ORAS linux user:", func() {
+	When("checking oras version", func() {
+		It("should run version command and show OS/Arch information", func() {
+			ORAS("version").MatchKeyWords("OS/Arch:", "linux/").Exec()
+		})
+	})
+})