github.com/axw/juju@v0.0.0-20161005053422-4bd6544d08d4/cmd/juju/backups/list.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  	"fmt"
     8  
     9  	"github.com/juju/cmd"
    10  	"github.com/juju/errors"
    11  
    12  	"github.com/juju/juju/cmd/modelcmd"
    13  )
    14  
    15  const listDoc = `
    16  backups provides the metadata associated with all backups.
    17  `
    18  
    19  // NewListCommand returns a command used to list metadata for backups.
    20  func NewListCommand() cmd.Command {
    21  	return modelcmd.Wrap(&listCommand{})
    22  }
    23  
    24  // listCommand is the sub-command for listing all available backups.
    25  type listCommand struct {
    26  	CommandBase
    27  }
    28  
    29  // Info implements Command.Info.
    30  func (c *listCommand) Info() *cmd.Info {
    31  	return &cmd.Info{
    32  		Name:    "backups",
    33  		Args:    "",
    34  		Purpose: "Displays information about all backups.",
    35  		Doc:     listDoc,
    36  		Aliases: []string{"list-backups"},
    37  	}
    38  }
    39  
    40  // Init implements Command.Init.
    41  func (c *listCommand) Init(args []string) error {
    42  	if err := cmd.CheckEmpty(args); err != nil {
    43  		return errors.Trace(err)
    44  	}
    45  	return nil
    46  }
    47  
    48  // Run implements Command.Run.
    49  func (c *listCommand) Run(ctx *cmd.Context) error {
    50  	if c.Log != nil {
    51  		if err := c.Log.Start(ctx); err != nil {
    52  			return err
    53  		}
    54  	}
    55  	client, err := c.NewAPIClient()
    56  	if err != nil {
    57  		return errors.Trace(err)
    58  	}
    59  	defer client.Close()
    60  
    61  	result, err := client.List()
    62  	if err != nil {
    63  		return errors.Trace(err)
    64  	}
    65  
    66  	if len(result.List) == 0 {
    67  		ctx.Infof("No backups to display.")
    68  		return nil
    69  	}
    70  
    71  	verbose := c.Log != nil && c.Log.Verbose
    72  	if verbose {
    73  		c.dumpMetadata(ctx, &result.List[0])
    74  	} else {
    75  		fmt.Fprintln(ctx.Stdout, result.List[0].ID)
    76  	}
    77  	for _, resultItem := range result.List[1:] {
    78  		if verbose {
    79  			fmt.Fprintln(ctx.Stdout)
    80  			c.dumpMetadata(ctx, &resultItem)
    81  		} else {
    82  			fmt.Fprintln(ctx.Stdout, resultItem.ID)
    83  		}
    84  	}
    85  	return nil
    86  }