48 lines
1 KiB
Go
48 lines
1 KiB
Go
// +build linux freebsd solaris
|
|
|
|
package directory
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"syscall"
|
|
)
|
|
|
|
// Size walks a directory tree and returns its total size in bytes.
|
|
func Size(dir string) (size int64, err error) {
|
|
data := make(map[uint64]struct{})
|
|
err = filepath.Walk(dir, func(d string, fileInfo os.FileInfo, err error) error {
|
|
if err != nil {
|
|
// if dir does not exist, Size() returns the error.
|
|
// if dir/x disappeared while walking, Size() ignores dir/x.
|
|
if os.IsNotExist(err) && d != dir {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
// Ignore directory sizes
|
|
if fileInfo == nil {
|
|
return nil
|
|
}
|
|
|
|
s := fileInfo.Size()
|
|
if fileInfo.IsDir() || s == 0 {
|
|
return nil
|
|
}
|
|
|
|
// Check inode to handle hard links correctly
|
|
inode := fileInfo.Sys().(*syscall.Stat_t).Ino
|
|
// inode is not a uint64 on all platforms. Cast it to avoid issues.
|
|
if _, exists := data[inode]; exists {
|
|
return nil
|
|
}
|
|
// inode is not a uint64 on all platforms. Cast it to avoid issues.
|
|
data[inode] = struct{}{}
|
|
|
|
size += s
|
|
|
|
return nil
|
|
})
|
|
return
|
|
}
|