mirror of https://github.com/status-im/op-geth.git
59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
// Package cp offers simple file and directory copying for Go.
|
|
package cp
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
)
|
|
|
|
var errCopyFileWithDir = errors.New("dir argument to CopyFile")
|
|
|
|
// CopyFile copies the file with path src to dst. The new file must not exist.
|
|
// It is created with the same permissions as src.
|
|
func CopyFile(dst, src string) error {
|
|
rf, err := os.Open(src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer rf.Close()
|
|
rstat, err := rf.Stat()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if rstat.IsDir() {
|
|
return errCopyFileWithDir
|
|
}
|
|
|
|
wf, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_EXCL, rstat.Mode())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if _, err := io.Copy(wf, rf); err != nil {
|
|
wf.Close()
|
|
return err
|
|
}
|
|
return wf.Close()
|
|
}
|
|
|
|
// CopyAll copies the file or (recursively) the directory at src to dst.
|
|
// Permissions are preserved. dst must not already exist.
|
|
func CopyAll(dst, src string) error {
|
|
return filepath.Walk(src, makeWalkFn(dst, src))
|
|
}
|
|
|
|
func makeWalkFn(dst, src string) filepath.WalkFunc {
|
|
return func(path string, info os.FileInfo, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
dstPath := filepath.Join(dst, strings.TrimPrefix(path, src))
|
|
if info.IsDir() {
|
|
return os.Mkdir(dstPath, info.Mode())
|
|
}
|
|
return CopyFile(dstPath, path)
|
|
}
|
|
}
|