open-consul/command/kvdel/kv_delete.go

163 lines
4.0 KiB
Go

package kvdel
import (
"flag"
"fmt"
"github.com/hashicorp/consul/api"
"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
usage string
cas bool
modifyIndex uint64
recurse bool
}
func (c *cmd) init() {
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
c.flags.BoolVar(&c.cas, "cas", false,
"Perform a Check-And-Set operation. Specifying this value also requires "+
"the -modify-index flag to be set. The default value is false.")
c.flags.Uint64Var(&c.modifyIndex, "modify-index", 0,
"Unsigned integer representing the ModifyIndex of the key. This is "+
"used in combination with the -cas flag.")
c.flags.BoolVar(&c.recurse, "recurse", false,
"Recursively delete all keys with the path. The default value is false.")
c.http = &flags.HTTPFlags{}
flags.Merge(c.flags, c.http.ClientFlags())
flags.Merge(c.flags, c.http.ServerFlags())
c.usage = flags.Usage(usage, c.flags, c.http.ClientFlags(), c.http.ServerFlags())
}
func (c *cmd) Run(args []string) int {
if err := c.flags.Parse(args); err != nil {
return 1
}
key := ""
// Check for arg validation
args = c.flags.Args()
switch len(args) {
case 0:
key = ""
case 1:
key = args[0]
default:
c.UI.Error(fmt.Sprintf("Too many arguments (expected 1, got %d)", len(args)))
return 1
}
// This is just a "nice" thing to do. Since pairs cannot start with a /, but
// users will likely put "/" or "/foo", lets go ahead and strip that for them
// here.
if len(key) > 0 && key[0] == '/' {
key = key[1:]
}
// If the key is empty and we are not doing a recursive delete, this is an
// error.
if key == "" && !c.recurse {
c.UI.Error("Error! Missing KEY argument")
return 1
}
// ModifyIndex is required for CAS
if c.cas && c.modifyIndex == 0 {
c.UI.Error("Must specify -modify-index with -cas!")
return 1
}
// Specifying a ModifyIndex for a non-CAS operation is not possible.
if c.modifyIndex != 0 && !c.cas {
c.UI.Error("Cannot specify -modify-index without -cas!")
}
// It is not valid to use a CAS and recurse in the same call
if c.recurse && c.cas {
c.UI.Error("Cannot specify both -cas and -recurse!")
return 1
}
// Create and test the HTTP client
client, err := c.http.APIClient()
if err != nil {
c.UI.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
return 1
}
switch {
case c.recurse:
if _, err := client.KV().DeleteTree(key, nil); err != nil {
c.UI.Error(fmt.Sprintf("Error! Did not delete prefix %s: %s", key, err))
return 1
}
c.UI.Info(fmt.Sprintf("Success! Deleted keys with prefix: %s", key))
return 0
case c.cas:
pair := &api.KVPair{
Key: key,
ModifyIndex: c.modifyIndex,
}
success, _, err := client.KV().DeleteCAS(pair, nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Error! Did not delete key %s: %s", key, err))
return 1
}
if !success {
c.UI.Error(fmt.Sprintf("Error! Did not delete key %s: CAS failed", key))
return 1
}
c.UI.Info(fmt.Sprintf("Success! Deleted key: %s", key))
return 0
default:
if _, err := client.KV().Delete(key, nil); err != nil {
c.UI.Error(fmt.Sprintf("Error deleting key %s: %s", key, err))
return 1
}
c.UI.Info(fmt.Sprintf("Success! Deleted key: %s", key))
return 0
}
}
func (c *cmd) Synopsis() string {
return "Removes data from the KV store"
}
func (c *cmd) Help() string {
return c.usage
}
const usage = `Usage: consul kv delete [options] KEY_OR_PREFIX
Removes the value from Consul's key-value store at the given path. If no
key exists at the path, no action is taken.
To delete the value for the key named "foo" in the key-value store:
$ consul kv delete foo
To delete all keys which start with "foo", specify the -recurse option:
$ consul kv delete -recurse foo
This will delete the keys named "foo", "food", and "foo/bar/zip" if they
existed. `