snapshot

Documentation

Index

• type LayeredMap
  • func NewLayeredMap(h func(string) (string, error), c func(string) (string, error)) *LayeredMap
  • func (l *LayeredMap) Add(s string) error
  • func (l *LayeredMap) CheckFileChange(s string) (bool, error)
  • func (l *LayeredMap) Get(s string) (string, bool)
  • func (l *LayeredMap) GetWhiteout(s string) (string, bool)
  • func (l *LayeredMap) Key() (string, error)
  • func (l *LayeredMap) MaybeAddWhiteout(s string) bool
  • func (l *LayeredMap) Snapshot()
• type Snapshotter
  • func NewSnapshotter(l *LayeredMap, d string) *Snapshotter
  • func (s *Snapshotter) Init() error
  • func (s *Snapshotter) Key() (string, error)
  • func (s *Snapshotter) TakeSnapshot(files []string) (string, error)
  • func (s *Snapshotter) TakeSnapshotFS() (string, error)

Types

type LayeredMap

type LayeredMap struct {
	// contains filtered or unexported fields
}

func NewLayeredMap

func NewLayeredMap(h func(string) (string, error), c func(string) (string, error)) *LayeredMap

func (*LayeredMap) Add

func (l *LayeredMap) Add(s string) error

Add will add the specified file s to the layered map.

func (*LayeredMap) CheckFileChange

func (l *LayeredMap) CheckFileChange(s string) (bool, error)

CheckFileChange checks whether a given file changed from the current layered map by its hashing function. Returns true if the file is changed.

func (*LayeredMap) Get

func (l *LayeredMap) Get(s string) (string, bool)

func (*LayeredMap) GetWhiteout

func (l *LayeredMap) GetWhiteout(s string) (string, bool)

func (*LayeredMap) Key

func (l *LayeredMap) Key() (string, error)

Key returns a hash for added files

func (*LayeredMap) MaybeAddWhiteout

func (l *LayeredMap) MaybeAddWhiteout(s string) bool

func (*LayeredMap) Snapshot

func (l *LayeredMap) Snapshot()

type Snapshotter

type Snapshotter struct {
	// contains filtered or unexported fields
}

Snapshotter holds the root directory from which to take snapshots, and a list of snapshots taken

func NewSnapshotter

func NewSnapshotter(l *LayeredMap, d string) *Snapshotter

NewSnapshotter creates a new snapshotter rooted at d

func (*Snapshotter) Init

func (s *Snapshotter) Init() error

Init initializes a new snapshotter

func (*Snapshotter) Key

func (s *Snapshotter) Key() (string, error)

Key returns a string based on the current state of the file system

func (*Snapshotter) TakeSnapshot

func (s *Snapshotter) TakeSnapshot(files []string) (string, error)

TakeSnapshot takes a snapshot of the specified files, avoiding directories in the whitelist, and creates a tarball of the changed files. Return contents of the tarball, and whether or not any files were changed

func (*Snapshotter) TakeSnapshotFS

func (s *Snapshotter) TakeSnapshotFS() (string, error)

TakeSnapshotFS takes a snapshot of the filesystem, avoiding directories in the whitelist, and creates a tarball of the changed files.