core: make rook version more readable

cmd/commands/root.go

@@ -18,6 +18,7 @@ package command
 import (
 	"context"
 	"fmt"
+	"regexp"
 	"strings"
 
 	"github.com/rook/kubectl-rook-ceph/pkg/exec"
@@ -105,8 +106,18 @@ func PreValidationCheck(ctx context.Context, k8sclientset *k8sutil.Clientsets, o
 		logging.Error(fmt.Errorf("CephCluster namespace '%s' does not exist. %v", cephClusterNamespace, err))
 	}
 
-	rookVersion := exec.RunCommandInOperatorPod(ctx, k8sclientset, "rook", []string{"version"}, operatorNamespace, cephClusterNamespace, true, false)
+	rookVersionOutput := exec.RunCommandInOperatorPod(ctx, k8sclientset, "rook", []string{"version"}, operatorNamespace, cephClusterNamespace, true, false)
+	rookVersion := trimGoVersionFromRookVersion(rookVersionOutput)
 	if strings.Contains(rookVersion, "alpha") || strings.Contains(rookVersion, "beta") {
 		logging.Warning("rook version '%s' is running a pre-release version of Rook.", rookVersion)
+		fmt.Println()
 	}
 }
+
+func trimGoVersionFromRookVersion(rookVersion string) string {
+	re := regexp.MustCompile("(?m)[\r\n]+^.*go: go.*$") // remove the go version from the output
+	rookVersion = re.ReplaceAllString(rookVersion, "")
+	rookVersion = strings.TrimSpace(rookVersion) // remove any trailing newlines
+
+	return rookVersion
+}

cmd/commands/root_test.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2023 The Rook Authors. 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 command
+
+import "testing"
+
+func Test_trimGoVersionFromRookVersion(t *testing.T) {
+	type args struct {
+		rookVersion string
+	}
+
+	sampleRookVersion := `rook: v1.11.0-alpha.0.420.gd9a17691c
+go: go1.19.10s`
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "trim go version from rook version",
+			args: args{rookVersion: sampleRookVersion},
+			want: "rook: v1.11.0-alpha.0.420.gd9a17691c",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := trimGoVersionFromRookVersion(tt.args.rookVersion); got != tt.want {
+				t.Errorf("trimGoVersionFromRookVersion() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

pkg/exec/exec.go

@@ -51,7 +51,6 @@ func RunCommandInOperatorPod(ctx context.Context, clientsets *k8sutil.Clientsets
 	if !returnOutput {
 		return ""
 	}
-	fmt.Println(stdout.String())
 
 	fmt.Print(stderr.String())
 	return stdout.String()