github.com/makyo/juju@v0.0.0-20160425123129-2608902037e9/cmd/juju/backups/show.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package backups
     5  
     6  import (
     7  	"github.com/juju/cmd"
     8  	"github.com/juju/errors"
     9  
    10  	"github.com/juju/juju/cmd/modelcmd"
    11  )
    12  
    13  const showDoc = `
    14  show-backup provides the metadata associated with a backup.
    15  `
    16  
    17  // NewShowCommand returns a command used to show metadata for a backup.
    18  func NewShowCommand() cmd.Command {
    19  	return modelcmd.Wrap(&showCommand{})
    20  }
    21  
    22  // showCommand is the sub-command for creating a new backup.
    23  type showCommand struct {
    24  	CommandBase
    25  	// ID is the backup ID to get.
    26  	ID string
    27  }
    28  
    29  // Info implements Command.Info.
    30  func (c *showCommand) Info() *cmd.Info {
    31  	return &cmd.Info{
    32  		Name:    "show-backup",
    33  		Args:    "<ID>",
    34  		Purpose: "get metadata",
    35  		Doc:     showDoc,
    36  	}
    37  }
    38  
    39  // Init implements Command.Init.
    40  func (c *showCommand) Init(args []string) error {
    41  	if len(args) == 0 {
    42  		return errors.New("missing ID")
    43  	}
    44  	id, args := args[0], args[1:]
    45  	if err := cmd.CheckEmpty(args); err != nil {
    46  		return errors.Trace(err)
    47  	}
    48  	c.ID = id
    49  	return nil
    50  }
    51  
    52  // Run implements Command.Run.
    53  func (c *showCommand) Run(ctx *cmd.Context) error {
    54  	if c.Log != nil {
    55  		if err := c.Log.Start(ctx); err != nil {
    56  			return err
    57  		}
    58  	}
    59  	client, err := c.NewAPIClient()
    60  	if err != nil {
    61  		return errors.Trace(err)
    62  	}
    63  	defer client.Close()
    64  
    65  	result, err := client.Info(c.ID)
    66  	if err != nil {
    67  		return errors.Trace(err)
    68  	}
    69  
    70  	c.dumpMetadata(ctx, result)
    71  	return nil
    72  }