github.com/bigcommerce/nomad@v0.9.3-bc/command/namespace_list.go (about) 1 package command 2 3 import ( 4 "fmt" 5 "sort" 6 "strings" 7 8 "github.com/hashicorp/nomad/api" 9 "github.com/posener/complete" 10 ) 11 12 type NamespaceListCommand struct { 13 Meta 14 } 15 16 func (c *NamespaceListCommand) Help() string { 17 helpText := ` 18 Usage: nomad namespace list [options] 19 20 List is used to list available namespaces. 21 22 General Options: 23 24 ` + generalOptionsUsage() + ` 25 26 List Options: 27 28 -json 29 Output the namespaces in a JSON format. 30 31 -t 32 Format and display the namespaces using a Go template. 33 ` 34 return strings.TrimSpace(helpText) 35 } 36 37 func (c *NamespaceListCommand) AutocompleteFlags() complete.Flags { 38 return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient), 39 complete.Flags{ 40 "-json": complete.PredictNothing, 41 "-t": complete.PredictAnything, 42 }) 43 } 44 45 func (c *NamespaceListCommand) AutocompleteArgs() complete.Predictor { 46 return complete.PredictNothing 47 } 48 49 func (c *NamespaceListCommand) Synopsis() string { 50 return "List namespaces" 51 } 52 53 func (c *NamespaceListCommand) Name() string { return "namespace list" } 54 55 func (c *NamespaceListCommand) Run(args []string) int { 56 var json bool 57 var tmpl string 58 59 flags := c.Meta.FlagSet(c.Name(), FlagSetClient) 60 flags.Usage = func() { c.Ui.Output(c.Help()) } 61 flags.BoolVar(&json, "json", false, "") 62 flags.StringVar(&tmpl, "t", "", "") 63 64 if err := flags.Parse(args); err != nil { 65 return 1 66 } 67 68 // Check that we got no arguments 69 args = flags.Args() 70 if l := len(args); l != 0 { 71 c.Ui.Error("This command takes no arguments") 72 c.Ui.Error(commandErrorText(c)) 73 return 1 74 } 75 76 // Get the HTTP client 77 client, err := c.Meta.Client() 78 if err != nil { 79 c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err)) 80 return 1 81 } 82 83 namespaces, _, err := client.Namespaces().List(nil) 84 if err != nil { 85 c.Ui.Error(fmt.Sprintf("Error retrieving namespaces: %s", err)) 86 return 1 87 } 88 89 if json || len(tmpl) > 0 { 90 out, err := Format(json, tmpl, namespaces) 91 if err != nil { 92 c.Ui.Error(err.Error()) 93 return 1 94 } 95 96 c.Ui.Output(out) 97 return 0 98 } 99 100 c.Ui.Output(formatNamespaces(namespaces)) 101 return 0 102 } 103 104 func formatNamespaces(namespaces []*api.Namespace) string { 105 if len(namespaces) == 0 { 106 return "No namespaces found" 107 } 108 109 // Sort the output by namespace name 110 sort.Slice(namespaces, func(i, j int) bool { return namespaces[i].Name < namespaces[j].Name }) 111 112 rows := make([]string, len(namespaces)+1) 113 rows[0] = "Name|Description" 114 for i, ns := range namespaces { 115 rows[i+1] = fmt.Sprintf("%s|%s", 116 ns.Name, 117 ns.Description) 118 } 119 return formatList(rows) 120 }