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// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package command
import (
"errors"
"os"
"time"
"github.com/urfave/cli"
"go.etcd.io/etcd/client/v2"
"go.etcd.io/etcd/pkg/v3/cobrautl"
)
// NewMakeCommand returns the CLI command for "mk".
func NewMakeCommand() cli.Command {
return cli.Command{
Name: "mk",
Usage: "make a new key with a given value",
ArgsUsage: "<key> <value>",
Flags: []cli.Flag{
cli.BoolFlag{Name: "in-order", Usage: "create in-order key under directory <key>"},
cli.IntFlag{Name: "ttl", Value: 0, Usage: "key time-to-live in seconds"},
},
Action: func(c *cli.Context) error {
mkCommandFunc(c, mustNewKeyAPI(c))
return nil
},
}
}
// mkCommandFunc executes the "mk" command.
func mkCommandFunc(c *cli.Context, ki client.KeysAPI) {
if len(c.Args()) == 0 {
handleError(c, cobrautl.ExitBadArgs, errors.New("key required"))
}
key := c.Args()[0]
value, err := argOrStdin(c.Args(), os.Stdin, 1)
if err != nil {
handleError(c, cobrautl.ExitBadArgs, errors.New("value required"))
}
ttl := c.Int("ttl")
inorder := c.Bool("in-order")
var resp *client.Response
ctx, cancel := contextWithTotalTimeout(c)
if !inorder {
// Since PrevNoExist means that the Node must not exist previously,
// this Set method always creates a new key. Therefore, mk command
// succeeds only if the key did not previously exist, and the command
// prevents one from overwriting values accidentally.
resp, err = ki.Set(ctx, key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevExist: client.PrevNoExist})
} else {
// If in-order flag is specified then create an inorder key under
// the directory identified by the key argument.
resp, err = ki.CreateInOrder(ctx, key, value, &client.CreateInOrderOptions{TTL: time.Duration(ttl) * time.Second})
}
cancel()
if err != nil {
handleError(c, cobrautl.ExitServerError, err)
}
printResponseKey(resp, c.GlobalString("output"))
}
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