mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
// Copyright 2015 CoreOS, Inc.
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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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"strings"
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"github.com/coreos/etcd/Godeps/_workspace/src/github.com/spf13/cobra"
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"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
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"github.com/coreos/etcd/clientv3"
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)
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var (
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getLimit int64
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getSortOrder string
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getSortTarget string
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getHex bool
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)
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// NewGetCommand returns the cobra command for "get".
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func NewGetCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "get [options] <key> [range_end]",
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Short: "Get gets the key or a range of keys.",
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Run: getCommandFunc,
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}
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cmd.Flags().StringVar(&getSortOrder, "order", "", "order of results; ASCEND or DESCEND")
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cmd.Flags().StringVar(&getSortTarget, "sort-by", "", "sort target; CREATE, KEY, MODIFY, VALUE, or VERSION")
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cmd.Flags().Int64Var(&getLimit, "limit", 0, "maximum number of results")
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cmd.Flags().BoolVar(&getHex, "hex", false, "print out key and value as hex encode string for text format")
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// TODO: add fromkey.
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// TODO: add prefix.
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// TODO: add consistency.
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return cmd
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}
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// getCommandFunc executes the "get" command.
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func getCommandFunc(cmd *cobra.Command, args []string) {
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if len(args) == 0 {
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ExitWithError(ExitBadArgs, fmt.Errorf("range command needs arguments."))
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}
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opts := []clientv3.OpOption{}
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key := args[0]
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if len(args) > 1 {
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opts = append(opts, clientv3.WithRange(args[1]))
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}
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opts = append(opts, clientv3.WithLimit(getLimit))
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sortByOrder := clientv3.SortNone
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sortOrder := strings.ToUpper(getSortOrder)
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switch {
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case sortOrder == "ASCEND":
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sortByOrder = clientv3.SortAscend
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case sortOrder == "DESCEND":
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sortByOrder = clientv3.SortDescend
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case sortOrder == "":
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// nothing
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default:
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ExitWithError(ExitBadFeature, fmt.Errorf("bad sort order %v", getSortOrder))
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}
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sortByTarget := clientv3.SortByKey
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sortTarget := strings.ToUpper(getSortTarget)
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switch {
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case sortTarget == "CREATE":
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sortByTarget = clientv3.SortByCreatedRev
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case sortTarget == "KEY":
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sortByTarget = clientv3.SortByKey
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case sortTarget == "MODIFY":
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sortByTarget = clientv3.SortByModifiedRev
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case sortTarget == "VALUE":
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sortByTarget = clientv3.SortByValue
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case sortTarget == "VERSION":
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sortByTarget = clientv3.SortByVersion
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case sortTarget == "":
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// nothing
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default:
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ExitWithError(ExitBadFeature, fmt.Errorf("bad sort target %v", getSortTarget))
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}
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opts = append(opts, clientv3.WithSort(sortByTarget, sortByOrder))
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c := mustClientFromCmd(cmd)
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kvapi := clientv3.NewKV(c)
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resp, err := kvapi.Get(context.TODO(), key, opts...)
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if err != nil {
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ExitWithError(ExitError, err)
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}
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for _, kv := range resp.Kvs {
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printKV(getHex, kv)
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}
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}
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