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etcdutils_fileio.go
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etcdutils_fileio.go
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package etcdutils
// This file contains helper functions for copying files, copying directories etc.
import (
"fmt"
"io"
"io/ioutil"
"os"
"path"
)
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}
func copyFile(src, dst string) error {
var err error
var srcfd *os.File
var dstfd *os.File
var srcinfo os.FileInfo
if srcfd, err = os.Open(src); err != nil {
return err
}
defer srcfd.Close()
if dstfd, err = os.Create(dst); err != nil {
return err
}
defer dstfd.Close()
if _, err = io.Copy(dstfd, srcfd); err != nil {
return err
}
if srcinfo, err = os.Stat(src); err != nil {
return err
}
return os.Chmod(dst, srcinfo.Mode())
}
// copyDir copies a whole directory recursively
func copyDir(src string, dst string) error {
var err error
var fds []os.FileInfo
var srcinfo os.FileInfo
if srcinfo, err = os.Stat(src); err != nil {
return err
}
if err = os.MkdirAll(dst, srcinfo.Mode()); err != nil {
return err
}
if fds, err = ioutil.ReadDir(src); err != nil {
return err
}
for _, fd := range fds {
srcfp := path.Join(src, fd.Name())
dstfp := path.Join(dst, fd.Name())
if fd.IsDir() {
if err = copyDir(srcfp, dstfp); err != nil {
fmt.Println(err)
}
} else {
if err = copyFile(srcfp, dstfp); err != nil {
fmt.Println(err)
}
}
}
return nil
}
func checkAndCreateDir(dirName string) bool {
src, err := os.Stat(dirName)
if os.IsNotExist(err) {
errDir := os.MkdirAll(dirName, os.ModePerm)
if errDir != nil {
panic(err)
}
return true
}
if src.Mode().IsRegular() {
fmt.Println(dirName, "already exist as a file!")
return false
}
return false
}