datas

type CommitOptions struct {
	// Parents, if provided is the parent commits of the commit we are
	// creating.
	Parents types.Set

	// Meta is a Struct that describes arbitrary metadata about this Commit,
	// e.g. a timestamp or descriptive text.
	Meta types.Struct

	// Policy will be called to attempt to merge this Commit with the current
	// Head, if this is not a fast-forward. If Policy is nil, no merging will
	// be attempted. Note that because Commit() retries in some cases, Policy
	// might also be called multiple times with different values.
	Policy merge.Policy
}

type Database interface {
	// To implement types.ValueWriter, Database implementations provide
	// WriteValue(). WriteValue() writes v to this Database, though v is not
	// guaranteed to be be persistent until after a subsequent Commit(). The
	// return value is the Ref of v.
	// Written values won't be persisted until a commit-alike
	types.ValueReadWriter

	// Close must have no side-effects
	io.Closer

	// Datasets returns the root of the database which is a
	// Map<String, Ref<Commit>> where string is a datasetID.
	Datasets() types.Map

	// GetDataset returns a Dataset struct containing the current mapping of
	// datasetID in the above Datasets Map.
	GetDataset(datasetID string) Dataset

	// Rebase brings this Database's view of the world inline with upstream.
	Rebase()

	// Commit updates the Commit that ds.ID() in this database points at. All
	// Values that have been written to this Database are guaranteed to be
	// persistent after Commit() returns.
	// The new Commit struct is constructed using v, opts.Parents, and
	// opts.Meta. If opts.Parents is the zero value (types.Set{}) then
	// the current head is used. If opts.Meta is the zero value
	// (types.Struct{}) then a fully initialized empty Struct is passed to
	// NewCommit.
	// The returned Dataset is always the newest snapshot, regardless of
	// success or failure, and Datasets() is updated to match backing storage
	// upon return as well. If the update cannot be performed, e.g., because
	// of a conflict, Commit returns an 'ErrMergeNeeded' error.
	Commit(ds Dataset, v types.Value, opts CommitOptions) (Dataset, error)

	// CommitValue updates the Commit that ds.ID() in this database points at.
	// All Values that have been written to this Database are guaranteed to be
	// persistent after Commit().
	// The new Commit struct is constructed using `v`, and the current Head of
	// `ds` as the lone Parent.
	// The returned Dataset is always the newest snapshot, regardless of
	// success or failure, and Datasets() is updated to match backing storage
	// upon return as well. If the update cannot be performed, e.g., because
	// of a conflict, Commit returns an 'ErrMergeNeeded' error.
	CommitValue(ds Dataset, v types.Value) (Dataset, error)

	// Delete removes the Dataset named ds.ID() from the map at the root of
	// the Database. The Dataset data is not necessarily cleaned up at this
	// time, but may be garbage collected in the future.
	// The returned Dataset is always the newest snapshot, regardless of
	// success or failure, and Datasets() is updated to match backing storage
	// upon return as well. If the update cannot be performed, e.g., because
	// of a conflict, Delete returns an 'ErrMergeNeeded' error.
	Delete(ds Dataset) (Dataset, error)

	// SetHead ignores any lineage constraints (e.g. the current Head being in
	// commit’s Parent set) and force-sets a mapping from datasetID: commit in
	// this database.
	// All Values that have been written to this Database are guaranteed to be
	// persistent after SetHead(). If the update cannot be performed, e.g.,
	// because another process moved the current Head out from under you,
	// error will be non-nil.
	// The newest snapshot of the Dataset is always returned, so the caller an
	// easily retry using the latest.
	// Regardless, Datasets() is updated to match backing storage upon return.
	SetHead(ds Dataset, newHeadRef types.Ref) (Dataset, error)

	// FastForward takes a types.Ref to a Commit object and makes it the new
	// Head of ds iff it is a descendant of the current Head. Intended to be
	// used e.g. after a call to Pull(). If the update cannot be performed,
	// e.g., because another process moved the current Head out from under
	// you, err will be non-nil.
	// The newest snapshot of the Dataset is always returned, so the caller
	// can easily retry using the latest.
	// Regardless, Datasets() is updated to match backing storage upon return.
	FastForward(ds Dataset, newHeadRef types.Ref) (Dataset, error)

	// Stats may return some kind of struct that reports statistics about the
	// ChunkStore that backs this Database instance. The type is
	// implementation-dependent, and impls may return nil
	Stats() interface{}

	// StatsSummary may return a string containing summarized statistics for
	// the ChunkStore that backs this Database. It must return "Unsupported"
	// if this operation is not supported.
	StatsSummary() string

	Flush()
	// contains filtered or unexported methods
}

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

type Handler func(w http.ResponseWriter, req *http.Request, ps URLParams, cs chunks.ChunkStore)

type PullProgress struct {
	DoneCount, KnownCount, ApproxWrittenBytes uint64
}

type RemoteDatabaseServer struct {

	// Called just before the server is started.
	Ready func()
	// contains filtered or unexported fields
}

type URLParams interface {
	ByName(string) string
}