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bee/internal/pkg/command/cmd.go

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2020-07-04 14:58:03 +00:00
package command
import (
"bytes"
"fmt"
"os/exec"
"strconv"
"strings"
)
// ExecCmdDirBytes executes system command in given directory
// and return stdout, stderr in bytes type, along with possible error.
func ExecCmdDirBytes(dir, cmdName string, args ...string) ([]byte, []byte, error) {
bufOut := new(bytes.Buffer)
bufErr := new(bytes.Buffer)
cmd := exec.Command(cmdName, args...)
cmd.Dir = dir
cmd.Stdout = bufOut
cmd.Stderr = bufErr
err := cmd.Run()
return bufOut.Bytes(), bufErr.Bytes(), err
}
// ExecCmdBytes executes system command
// and return stdout, stderr in bytes type, along with possible error.
func ExecCmdBytes(cmdName string, args ...string) ([]byte, []byte, error) {
return ExecCmdDirBytes("", cmdName, args...)
}
// ExecCmdDir executes system command in given directory
// and return stdout, stderr in string type, along with possible error.
func ExecCmdDir(dir, cmdName string, args ...string) (string, string, error) {
bufOut, bufErr, err := ExecCmdDirBytes(dir, cmdName, args...)
return string(bufOut), string(bufErr), err
}
// ExecCmd executes system command
// and return stdout, stderr in string type, along with possible error.
func ExecCmd(cmdName string, args ...string) (string, string, error) {
return ExecCmdDir("", cmdName, args...)
}
// 版本对比 v1比v2大返回1小于返回-1等于返回0
func VerCompare(ver1, ver2 string) int {
ver1 = strings.TrimLeft(ver1, "ver") // 清除v,e,r
ver2 = strings.TrimLeft(ver2, "ver") // 清除v,e,r
p1 := strings.Split(ver1, ".")
p2 := strings.Split(ver2, ".")
ver1 = ""
for _, v := range p1 {
iv, _ := strconv.Atoi(v)
ver1 = fmt.Sprintf("%s%04d", ver1, iv)
}
ver2 = ""
for _, v := range p2 {
iv, _ := strconv.Atoi(v)
ver2 = fmt.Sprintf("%s%04d", ver2, iv)
}
return strings.Compare(ver1, ver2)
}