github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/internal/utils/dir.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package utils
    16  
    17  import (
    18  	"os"
    19  	"os/exec"
    20  	"strconv"
    21  	"strings"
    22  )
    23  
    24  func GetDirSize(dir string) int64 {
    25  	if _, err := os.Stat(dir); os.IsNotExist(err) {
    26  		return 0
    27  	}
    28  	res := strings.Split(Command("du", "-sb", dir), "\t")
    29  	if len(res) < 2 || len(res) > 2 {
    30  		return 0
    31  	}
    32  	size, err := strconv.ParseInt(res[0], 10, 64)
    33  	if err != nil {
    34  		return 0
    35  	}
    36  	return size
    37  }
    38  
    39  func Command(key string, arg ...string) string {
    40  	cmd := exec.Command(key, arg...)
    41  	b, _ := cmd.CombinedOutput()
    42  	return strings.TrimSpace(string(b))
    43  }
    44  
    45  func IsFileNotExist(name string) bool {
    46  	if len(name) == 0 {
    47  		return true
    48  	}
    49  	_, err := os.Stat(name)
    50  	return err != nil && os.IsNotExist(err)
    51  }
    52  
    53  func IsFileExist(name string) bool {
    54  	if len(name) == 0 {
    55  		return false
    56  	}
    57  	_, err := os.Stat(name)
    58  	return err == nil || !os.IsNotExist(err)
    59  }