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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 (
"fmt"
"os"
"strconv"
"github.com/spf13/cobra"
"go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/pkg/v3/cobrautl"
)
var (
leaseStr string
putPrevKV bool
putIgnoreVal bool
putIgnoreLease bool
)
// NewPutCommand returns the cobra command for "put".
func NewPutCommand() *cobra.Command {
cmd := &cobra.Command{
Use: "put [options] <key> <value> (<value> can also be given from stdin)",
Short: "Puts the given key into the store",
Long: `
Puts the given key into the store.
When <value> begins with '-', <value> is interpreted as a flag.
Insert '--' for workaround:
$ put <key> -- <value>
$ put -- <key> <value>
If <value> isn't given as a command line argument and '--ignore-value' is not specified,
this command tries to read the value from standard input.
If <lease> isn't given as a command line argument and '--ignore-lease' is not specified,
this command tries to read the value from standard input.
For example,
$ cat file | put <key>
will store the content of the file to <key>.
`,
Run: putCommandFunc,
}
cmd.Flags().StringVar(&leaseStr, "lease", "0", "lease ID (in hexadecimal) to attach to the key")
cmd.Flags().BoolVar(&putPrevKV, "prev-kv", false, "return the previous key-value pair before modification")
cmd.Flags().BoolVar(&putIgnoreVal, "ignore-value", false, "updates the key using its current value")
cmd.Flags().BoolVar(&putIgnoreLease, "ignore-lease", false, "updates the key using its current lease")
return cmd
}
// putCommandFunc executes the "put" command.
func putCommandFunc(cmd *cobra.Command, args []string) {
key, value, opts := getPutOp(args)
ctx, cancel := commandCtx(cmd)
resp, err := mustClientFromCmd(cmd).Put(ctx, key, value, opts...)
cancel()
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitError, err)
}
display.Put(*resp)
}
func getPutOp(args []string) (string, string, []clientv3.OpOption) {
if len(args) == 0 {
cobrautl.ExitWithError(cobrautl.ExitBadArgs, fmt.Errorf("put command needs 1 argument and input from stdin or 2 arguments"))
}
key := args[0]
if putIgnoreVal && len(args) > 1 {
cobrautl.ExitWithError(cobrautl.ExitBadArgs, fmt.Errorf("put command needs only 1 argument when 'ignore-value' is set"))
}
var value string
var err error
if !putIgnoreVal {
value, err = argOrStdin(args, os.Stdin, 1)
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitBadArgs, fmt.Errorf("put command needs 1 argument and input from stdin or 2 arguments"))
}
}
id, err := strconv.ParseInt(leaseStr, 16, 64)
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitBadArgs, fmt.Errorf("bad lease ID (%v), expecting ID in Hex", err))
}
opts := []clientv3.OpOption{}
if id != 0 {
opts = append(opts, clientv3.WithLease(clientv3.LeaseID(id)))
}
if putPrevKV {
opts = append(opts, clientv3.WithPrevKV())
}
if putIgnoreVal {
opts = append(opts, clientv3.WithIgnoreValue())
}
if putIgnoreLease {
opts = append(opts, clientv3.WithIgnoreLease())
}
return key, value, opts
}
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