open-nomad/command/namespace_list.go
2017-09-07 17:04:21 -07:00

114 lines
2.2 KiB
Go

package command
import (
"fmt"
"strings"
"github.com/hashicorp/nomad/api"
"github.com/posener/complete"
)
type NamespaceListCommand struct {
Meta
}
func (c *NamespaceListCommand) Help() string {
helpText := `
Usage: nomad namespace list [options]
List is used to list available namespaces.
General Options:
` + generalOptionsUsage() + `
List Options:
-json
Output the namespaces in a JSON format.
-t
Format and display the namespaces using a Go template.
`
return strings.TrimSpace(helpText)
}
func (c *NamespaceListCommand) AutocompleteFlags() complete.Flags {
return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
complete.Flags{
"-json": complete.PredictNothing,
"-t": complete.PredictAnything,
})
}
func (c *NamespaceListCommand) AutocompleteArgs() complete.Predictor {
return complete.PredictNothing
}
func (c *NamespaceListCommand) Synopsis() string {
return "List namespaces"
}
func (c *NamespaceListCommand) Run(args []string) int {
var json bool
var tmpl string
flags := c.Meta.FlagSet("namespace list", FlagSetClient)
flags.Usage = func() { c.Ui.Output(c.Help()) }
flags.BoolVar(&json, "json", false, "")
flags.StringVar(&tmpl, "t", "", "")
if err := flags.Parse(args); err != nil {
return 1
}
// Check that we got no arguments
args = flags.Args()
if l := len(args); l != 0 {
c.Ui.Error(c.Help())
return 1
}
// Get the HTTP client
client, err := c.Meta.Client()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
namespaces, _, err := client.Namespaces().List(nil)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error retrieving namespaces: %s", err))
return 1
}
if json || len(tmpl) > 0 {
out, err := Format(json, tmpl, namespaces)
if err != nil {
c.Ui.Error(err.Error())
return 1
}
c.Ui.Output(out)
return 0
}
c.Ui.Output(formatNamespaces(namespaces))
return 0
}
func formatNamespaces(namespaces []*api.Namespace) string {
if len(namespaces) == 0 {
return "No namespaces found"
}
rows := make([]string, len(namespaces)+1)
rows[0] = "Name|Description"
for i, ns := range namespaces {
rows[i+1] = fmt.Sprintf("%s|%s",
ns.Name,
ns.Description)
}
return formatList(rows)
}