mirror of
https://github.com/etcd-io/etcd.git
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119 lines
3.4 KiB
Go
119 lines
3.4 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package command
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import (
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"fmt"
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"os"
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"strconv"
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"github.com/spf13/cobra"
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"go.etcd.io/etcd/clientv3"
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)
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var (
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leaseStr string
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putPrevKV bool
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putIgnoreVal bool
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putIgnoreLease bool
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)
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// NewPutCommand returns the cobra command for "put".
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func NewPutCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "put [options] <key> <value> (<value> can also be given from stdin)",
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Short: "Puts the given key into the store",
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Long: `
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Puts the given key into the store.
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When <value> begins with '-', <value> is interpreted as a flag.
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Insert '--' for workaround:
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$ put <key> -- <value>
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$ put -- <key> <value>
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If <value> isn't given as a command line argument and '--ignore-value' is not specified,
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this command tries to read the value from standard input.
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If <lease> isn't given as a command line argument and '--ignore-lease' is not specified,
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this command tries to read the value from standard input.
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For example,
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$ cat file | put <key>
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will store the content of the file to <key>.
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`,
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Run: putCommandFunc,
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}
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cmd.Flags().StringVar(&leaseStr, "lease", "0", "lease ID (in hexadecimal) to attach to the key")
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cmd.Flags().BoolVar(&putPrevKV, "prev-kv", false, "return the previous key-value pair before modification")
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cmd.Flags().BoolVar(&putIgnoreVal, "ignore-value", false, "updates the key using its current value")
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cmd.Flags().BoolVar(&putIgnoreLease, "ignore-lease", false, "updates the key using its current lease")
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return cmd
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}
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// putCommandFunc executes the "put" command.
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func putCommandFunc(cmd *cobra.Command, args []string) {
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key, value, opts := getPutOp(args)
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ctx, cancel := commandCtx(cmd)
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resp, err := mustClientFromCmd(cmd).Put(ctx, key, value, opts...)
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cancel()
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if err != nil {
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ExitWithError(ExitError, err)
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}
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display.Put(*resp)
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}
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func getPutOp(args []string) (string, string, []clientv3.OpOption) {
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if len(args) == 0 {
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ExitWithError(ExitBadArgs, fmt.Errorf("put command needs 1 argument and input from stdin or 2 arguments"))
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}
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key := args[0]
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if putIgnoreVal && len(args) > 1 {
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ExitWithError(ExitBadArgs, fmt.Errorf("put command needs only 1 argument when 'ignore-value' is set"))
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}
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var value string
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var err error
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if !putIgnoreVal {
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value, err = argOrStdin(args, os.Stdin, 1)
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if err != nil {
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ExitWithError(ExitBadArgs, fmt.Errorf("put command needs 1 argument and input from stdin or 2 arguments"))
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}
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}
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id, err := strconv.ParseInt(leaseStr, 16, 64)
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if err != nil {
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ExitWithError(ExitBadArgs, fmt.Errorf("bad lease ID (%v), expecting ID in Hex", err))
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}
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opts := []clientv3.OpOption{}
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if id != 0 {
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opts = append(opts, clientv3.WithLease(clientv3.LeaseID(id)))
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}
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if putPrevKV {
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opts = append(opts, clientv3.WithPrevKV())
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}
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if putIgnoreVal {
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opts = append(opts, clientv3.WithIgnoreValue())
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}
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if putIgnoreLease {
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opts = append(opts, clientv3.WithIgnoreLease())
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}
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return key, value, opts
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}
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