open-consul/command/config/read/config_read.go

97 lines
2.0 KiB
Go

package read
import (
"encoding/json"
"flag"
"fmt"
"github.com/hashicorp/consul/command/flags"
"github.com/mitchellh/cli"
)
func New(ui cli.Ui) *cmd {
c := &cmd{UI: ui}
c.init()
return c
}
type cmd struct {
UI cli.Ui
flags *flag.FlagSet
http *flags.HTTPFlags
help string
kind string
name string
}
func (c *cmd) init() {
// TODO(rb): needs a way to print the metadata so you know the modify index to use for 'config write -cas'
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
c.flags.StringVar(&c.kind, "kind", "", "The kind of configuration to read.")
c.flags.StringVar(&c.name, "name", "", "The name of configuration to read.")
c.http = &flags.HTTPFlags{}
flags.Merge(c.flags, c.http.ClientFlags())
flags.Merge(c.flags, c.http.ServerFlags())
flags.Merge(c.flags, c.http.NamespaceFlags())
c.help = flags.Usage(help, c.flags)
}
func (c *cmd) Run(args []string) int {
if err := c.flags.Parse(args); err != nil {
return 1
}
if c.kind == "" {
c.UI.Error("Must specify the -kind parameter")
return 1
}
if c.name == "" {
c.UI.Error("Must specify the -name parameter")
return 1
}
client, err := c.http.APIClient()
if err != nil {
c.UI.Error(fmt.Sprintf("Error connect to Consul agent: %s", err))
return 1
}
entry, _, err := client.ConfigEntries().Get(c.kind, c.name, nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Error reading config entry %q / %q: %v", c.kind, c.name, err))
return 1
}
b, err := json.MarshalIndent(entry, "", " ")
if err != nil {
c.UI.Error("Failed to encode output data")
return 1
}
c.UI.Info(string(b))
return 0
}
func (c *cmd) Synopsis() string {
return synopsis
}
func (c *cmd) Help() string {
return flags.Usage(c.help, nil)
}
const synopsis = "Read a centralized config entry"
const help = `
Usage: consul config read [options] -kind <config kind> -name <config name>
Reads the config entry specified by the given kind and name and outputs its
JSON representation.
Example:
$ consul config read -kind proxy-defaults -name global
`