portainer/api/backup/copy.go

69 lines
1.4 KiB
Go
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package backup
import (
"errors"
"io"
"os"
"path/filepath"
"strings"
)
func copyPath(path string, toDir string) error {
info, err := os.Stat(path)
if err != nil && errors.Is(err, os.ErrNotExist) {
// skip copy if file does not exist
return nil
}
if !info.IsDir() {
destination := filepath.Join(toDir, info.Name())
return copyFile(path, destination)
}
return copyDir(path, toDir)
}
func copyDir(fromDir, toDir string) error {
cleanedSourcePath := filepath.Clean(fromDir)
parentDirectory := filepath.Dir(cleanedSourcePath)
err := filepath.Walk(cleanedSourcePath, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
destination := filepath.Join(toDir, strings.TrimPrefix(path, parentDirectory))
if info.IsDir() {
return nil // skip directory creations
}
if info.Mode()&os.ModeSymlink != 0 { // entry is a symlink
return nil // don't copy symlinks
}
return copyFile(path, destination)
})
return err
}
// copies regular a file from src to dst
func copyFile(src, dst string) error {
from, err := os.Open(src)
if err != nil {
return err
}
defer from.Close()
// has to include 'execute' bit, otherwise fails. MkdirAll follows `mkdir -m` restrictions
if err := os.MkdirAll(filepath.Dir(dst), 0744); err != nil {
return err
}
to, err := os.Create(dst)
if err != nil {
return err
}
defer to.Close()
_, err = io.Copy(to, from)
return err
}