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) Get(s string) (string, bool)
  • func (l *LayeredMap) GetFlattenedPathsForWhiteOut() map[string]struct{}
  • func (l *LayeredMap) GetWhiteout(s string) (string, bool)
  • func (l *LayeredMap) Key() (string, error)
  • func (l *LayeredMap) MaybeAdd(s string) (bool, 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) Get

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

func (*LayeredMap) GetFlattenedPathsForWhiteOut

func (l *LayeredMap) GetFlattenedPathsForWhiteOut() map[string]struct{}

GetFlattenedPathsForWhiteOut returns all paths in the current FS

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) MaybeAdd

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

MaybeAdd will add the specified file s to the layered map if the layered map's hashing function determines it has changed. If it has not changed, it will not be added. Returns true if the file was added.

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.