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change copy behavior around symlinks

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This commit is contained in:
Benjamin Elder
2018-09-19 17:55:46 -07:00
parent 27ef68e556
commit 201607d382
1 changed files with 10 additions and 13 deletions
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23
pkg/fs/fs.go
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@@ -15,6 +15,7 @@ limitations under the License.
*/
// Package fs contains utilites for interacting with the host filesystem
// in a docker friendly way
package fs
import (
@@ -43,6 +44,7 @@ func TempDir(dir, prefix string) (name string, err error) {
// Copy recursively directories, symlinks, files copies from src to dst
// Copy will make dirs as necessary, and keep file modes
// Symlinks will be dereferenced similar to `cp -r src dst`
func Copy(src, dst string) error {
// get source info
info, err := os.Lstat(src)
@@ -59,7 +61,7 @@ func Copy(src, dst string) error {
func copy(src, dst string, info os.FileInfo) error {
if info.Mode()&os.ModeSymlink != 0 {
return CopySymlink(src, dst)
return copySymlink(src, dst)
}
if info.IsDir() {
return copyDir(src, dst, info)
@@ -106,24 +108,19 @@ func copyFile(src, dst string, info os.FileInfo) error {
return err
}
// CopySymlink copies a symlink from src to dst
func CopySymlink(src, dst string) error {
// find the actual source link
realSrc, err := os.Readlink(src)
// copySymlink dereferences and then copies a symlink
func copySymlink(src, dst string) error {
// read through the symlink
realSrc, err := filepath.EvalSymlinks(src)
if err != nil {
return err
}
// create a new link
return os.Symlink(realSrc, dst)
}
// CopyDir copies a directory recursively from src to dst
func CopyDir(src, dst string) error {
info, err := os.Lstat(src)
info, err := os.Lstat(realSrc)
if err != nil {
return err
}
return copyDir(src, dst, info)
// copy the underlying contents
return copy(realSrc, dst, info)
}
func copyDir(src, dst string, info os.FileInfo) error {