github.com/pingcap/tiup@v1.15.1/components/dm/command/display.go (about)

     1  // Copyright 2020 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package command
    15  
    16  import (
    17  	"errors"
    18  	"fmt"
    19  	"strings"
    20  
    21  	perrs "github.com/pingcap/errors"
    22  	"github.com/pingcap/tiup/pkg/cluster/manager"
    23  	"github.com/pingcap/tiup/pkg/cluster/spec"
    24  	"github.com/pingcap/tiup/pkg/meta"
    25  	"github.com/spf13/cobra"
    26  )
    27  
    28  func newDisplayCmd() *cobra.Command {
    29  	var (
    30  		dopt            manager.DisplayOption
    31  		showVersionOnly bool
    32  		statusTimeout   uint64
    33  	)
    34  	cmd := &cobra.Command{
    35  		Use:   "display <cluster-name>",
    36  		Short: "Display information of a DM cluster",
    37  		RunE: func(cmd *cobra.Command, args []string) error {
    38  			if len(args) != 1 {
    39  				return cmd.Help()
    40  			}
    41  
    42  			gOpt.APITimeout = statusTimeout
    43  			dopt.ClusterName = args[0]
    44  
    45  			if showVersionOnly {
    46  				metadata, err := spec.ClusterMetadata(dopt.ClusterName)
    47  				if err != nil && !errors.Is(perrs.Cause(err), meta.ErrValidate) {
    48  					return err
    49  				}
    50  				fmt.Println(metadata.Version)
    51  				return nil
    52  			}
    53  
    54  			return cm.Display(dopt, gOpt)
    55  		},
    56  		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    57  			switch len(args) {
    58  			case 0:
    59  				return shellCompGetClusterName(cm, toComplete)
    60  			default:
    61  				return nil, cobra.ShellCompDirectiveNoFileComp
    62  			}
    63  		},
    64  	}
    65  
    66  	cmd.Flags().StringSliceVarP(&gOpt.Roles, "role", "R", nil, "Only display specified roles")
    67  	cmd.Flags().StringSliceVarP(&gOpt.Nodes, "node", "N", nil, "Only display specified nodes")
    68  	cmd.Flags().BoolVar(&showVersionOnly, "version", false, "Only display DM cluster version")
    69  	cmd.Flags().BoolVar(&dopt.ShowUptime, "uptime", false, "Display DM with uptime")
    70  	cmd.Flags().Uint64Var(&statusTimeout, "status-timeout", 10, "Timeout in seconds when getting node status")
    71  
    72  	return cmd
    73  }
    74  
    75  func shellCompGetClusterName(cm *manager.Manager, toComplete string) ([]string, cobra.ShellCompDirective) {
    76  	var result []string
    77  	clusters, _ := cm.GetClusterList()
    78  	for _, c := range clusters {
    79  		if strings.HasPrefix(c.Name, toComplete) {
    80  			result = append(result, c.Name)
    81  		}
    82  	}
    83  	return result, cobra.ShellCompDirectiveNoFileComp
    84  }