123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
package fstest
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"time"
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"github.com/containerd/continuity/sysx"
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)
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// Applier applies single file changes
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type Applier interface {
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Apply(root string) error
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}
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type applyFn func(root string) error
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func (a applyFn) Apply(root string) error {
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return a(root)
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}
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// CreateFile returns a file applier which creates a file as the
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// provided name with the given content and permission.
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func CreateFile(name string, content []byte, perm os.FileMode) Applier {
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return applyFn(func(root string) error {
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fullPath := filepath.Join(root, name)
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if err := ioutil.WriteFile(fullPath, content, perm); err != nil {
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return err
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}
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if err := os.Chmod(fullPath, perm); err != nil {
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return err
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}
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return nil
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})
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}
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// Remove returns a file applier which removes the provided file name
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func Remove(name string) Applier {
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return applyFn(func(root string) error {
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return os.Remove(filepath.Join(root, name))
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})
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}
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// RemoveAll returns a file applier which removes the provided file name
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// as in os.RemoveAll
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func RemoveAll(name string) Applier {
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return applyFn(func(root string) error {
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return os.RemoveAll(filepath.Join(root, name))
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})
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}
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// CreateDir returns a file applier to create the directory with
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// the provided name and permission
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func CreateDir(name string, perm os.FileMode) Applier {
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return applyFn(func(root string) error {
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fullPath := filepath.Join(root, name)
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return os.MkdirAll(fullPath, perm)
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})
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}
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// Rename returns a file applier which renames a file
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func Rename(old, new string) Applier {
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return applyFn(func(root string) error {
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return os.Rename(filepath.Join(root, old), filepath.Join(root, new))
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})
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}
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// Chown returns a file applier which changes the ownership of a file
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func Chown(name string, uid, gid int) Applier {
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return applyFn(func(root string) error {
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return os.Chown(filepath.Join(root, name), uid, gid)
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})
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}
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// Chtime changes access and mod time of file
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func Chtime(name string, t time.Time) Applier {
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return applyFn(func(root string) error {
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return os.Chtimes(filepath.Join(root, name), t, t)
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})
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}
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// Symlink returns a file applier which creates a symbolic link
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func Symlink(oldname, newname string) Applier {
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return applyFn(func(root string) error {
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return os.Symlink(oldname, filepath.Join(root, newname))
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})
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}
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// Link returns a file applier which creates a hard link
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func Link(oldname, newname string) Applier {
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return applyFn(func(root string) error {
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return os.Link(filepath.Join(root, oldname), filepath.Join(root, newname))
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})
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}
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func SetXAttr(name, key, value string) Applier {
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return applyFn(func(root string) error {
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return sysx.LSetxattr(name, key, []byte(value), 0)
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})
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}
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// TODO: Make platform specific, windows applier is always no-op
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//func Mknod(name string, mode int32, dev int) Applier {
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// return func(root string) error {
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// return return syscall.Mknod(path, mode, dev)
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// }
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//}
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// Apply returns a new applier from the given appliers
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func Apply(appliers ...Applier) Applier {
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return applyFn(func(root string) error {
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for _, a := range appliers {
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if err := a.Apply(root); err != nil {
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return err
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}
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}
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return nil
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})
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}
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