73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
package main
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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log "github.com/sirupsen/logrus"
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)
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/*help to copy the file, ioutil doesn't offer the feature*/
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func copyFileContents(src, dst string) (err error) {
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in, err := os.Open(src)
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if err != nil {
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return
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}
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defer in.Close()
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out, err := os.Create(dst)
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if err != nil {
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return
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}
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defer func() {
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cerr := out.Close()
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if err == nil {
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err = cerr
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}
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}()
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if _, err = io.Copy(out, in); err != nil {
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return
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}
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err = out.Sync()
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return
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}
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/*copy the file, ioutile doesn't offer the feature*/
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func CopyFile(sourceSymLink, destinationFile string) (err error) {
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sourceFile, err := filepath.EvalSymlinks(sourceSymLink)
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if err != nil {
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log.Infof("Not a symlink : %s", err)
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sourceFile = sourceSymLink
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}
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sourceFileStat, err := os.Stat(sourceFile)
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if err != nil {
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return
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}
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if !sourceFileStat.Mode().IsRegular() {
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// cannot copy non-regular files (e.g., directories,
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// symlinks, devices, etc.)
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return fmt.Errorf("copyFile: non-regular source file %s (%q)", sourceFileStat.Name(), sourceFileStat.Mode().String())
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}
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destinationFileStat, err := os.Stat(destinationFile)
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if err != nil {
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if !os.IsNotExist(err) {
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return
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}
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} else {
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if !(destinationFileStat.Mode().IsRegular()) {
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return fmt.Errorf("copyFile: non-regular destination file %s (%q)", destinationFileStat.Name(), destinationFileStat.Mode().String())
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}
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if os.SameFile(sourceFileStat, destinationFileStat) {
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return
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}
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}
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if err = os.Link(sourceFile, destinationFile); err != nil {
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err = copyFileContents(sourceFile, destinationFile)
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}
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return
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}
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