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cp's -T and --reflink=auto are only available on GNU coreutils

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Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
This commit is contained in:
Kato Kazuyoshi 2014-06-21 18:50:52 +09:00
parent f1ac8962f9
commit 733711481e
1 changed files with 18 additions and 1 deletions
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19
daemon/graphdriver/vfs/driver.go
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@ -1,6 +1,7 @@
package vfs package vfs
import ( import (
"bytes"
"fmt" "fmt"
"github.com/dotcloud/docker/daemon/graphdriver" "github.com/dotcloud/docker/daemon/graphdriver"
"os" "os"
@ -35,8 +36,24 @@ func (d *Driver) Cleanup() error {
return nil return nil
} }
func isGNUcoreutils() bool {
if stdout, err := exec.Command("cp", "--version").Output(); err == nil {
return bytes.Contains(stdout, []byte("GNU coreutils"))
}
return false
}
func copyDir(src, dst string) error { func copyDir(src, dst string) error {
if output, err := exec.Command("cp", "-aT", "--reflink=auto", src, dst).CombinedOutput(); err != nil { argv := make([]string, 0, 4)
if isGNUcoreutils() {
argv = append(argv, "-aT", "--reflink=auto", src, dst)
} else {
argv = append(argv, "-a", src+"/.", dst+"/.")
}
if output, err := exec.Command("cp", argv...).CombinedOutput(); err != nil {
return fmt.Errorf("Error VFS copying directory: %s (%s)", err, output) return fmt.Errorf("Error VFS copying directory: %s (%s)", err, output)
} }
return nil return nil