mirror of https://github.com/chaos-mesh/chaosd.git
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
// Copyright 2022 Chaos Mesh 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"os"
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"github.com/pingcap/errors"
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"github.com/pingcap/log"
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"github.com/spf13/cobra"
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"go.uber.org/zap"
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)
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func NewFileAppendCommand() *cobra.Command {
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var fileName, data string
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var count int
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cmd := &cobra.Command{
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Use: "append",
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Short: "append data to a file",
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Run: func(*cobra.Command, []string) {
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exit(appendFile(fileName, data, count))
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},
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}
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cmd.Flags().StringVarP(&fileName, "file-name", "f", "", "append data to the file")
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cmd.Flags().StringVarP(&data, "data", "d", "", "the appended data")
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cmd.Flags().IntVarP(&count, "count", "c", 1, "the append count of data")
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return cmd
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}
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func appendFile(fileName, data string, count int) error {
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f, err := os.OpenFile(fileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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return errors.WithStack(err)
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}
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defer func() {
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if err := f.Close(); err != nil {
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log.Error("close file failed", zap.Error(err))
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}
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}()
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for i := 0; i < count; i++ {
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if _, err := f.Write([]byte(fmt.Sprintf("%s\n", data))); err != nil {
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return errors.WithStack(err)
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}
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}
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return nil
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}
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