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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package utils
import (
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
)
// CopyFile will copy a file from src path to dst path.
// Overwrites any existing files at dst.
// Permissions are copied from file at src to the new file at dst.
func CopyFile(src, dst string) (err error) {
in, err := os.Open(src)
if err != nil {
return
}
defer in.Close()
if err = os.MkdirAll(filepath.Dir(dst), os.ModePerm); err != nil {
return
}
out, err := os.Create(dst)
if err != nil {
return
}
defer func() {
if e := out.Close(); e != nil {
err = e
}
}()
_, err = io.Copy(out, in)
if err != nil {
return
}
err = out.Sync()
if err != nil {
return
}
stat, err := os.Stat(src)
if err != nil {
return
}
err = os.Chmod(dst, stat.Mode())
if err != nil {
return
}
return
}
// CopyDir will copy a directory and all contained files and directories.
// src must exist and dst must not exist.
// Permissions are preserved when possible. Symlinks are skipped.
func CopyDir(src string, dst string) (err error) {
src = filepath.Clean(src)
dst = filepath.Clean(dst)
stat, err := os.Stat(src)
if err != nil {
return
}
if !stat.IsDir() {
return fmt.Errorf("source must be a directory")
}
_, err = os.Stat(dst)
if err != nil && !os.IsNotExist(err) {
return
}
if err == nil {
return fmt.Errorf("destination already exists")
}
err = os.MkdirAll(dst, stat.Mode())
if err != nil {
return
}
items, err := ioutil.ReadDir(src)
if err != nil {
return
}
for _, item := range items {
srcPath := filepath.Join(src, item.Name())
dstPath := filepath.Join(dst, item.Name())
if item.IsDir() {
err = CopyDir(srcPath, dstPath)
if err != nil {
return
}
} else {
if item.Mode()&os.ModeSymlink != 0 {
continue
}
err = CopyFile(srcPath, dstPath)
if err != nil {
return
}
}
}
return
}
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