106 lines
3.4 KiB
Go
106 lines
3.4 KiB
Go
// Copyright (C) 2021 Storj Labs, Inc.
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// See LICENSE for copying information.
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package ulfs
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import (
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"context"
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"github.com/zeebo/clingy"
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"github.com/zeebo/errs"
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"storj.io/storj/cmd/uplinkng/ulloc"
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)
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// Mixed dispatches to either the local or remote filesystem depending on the location.
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type Mixed struct {
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local *Local
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remote *Remote
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}
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// NewMixed returns a Mixed backed by the provided local and remote filesystems.
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func NewMixed(local *Local, remote *Remote) *Mixed {
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return &Mixed{
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local: local,
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remote: remote,
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}
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}
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// Close releases any resources that the Mixed contails.
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func (m *Mixed) Close() error {
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return m.remote.Close()
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}
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// Open returns a MultiReadHandle to either a local file, remote object, or stdin.
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func (m *Mixed) Open(ctx clingy.Context, loc ulloc.Location) (MultiReadHandle, error) {
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if bucket, key, ok := loc.RemoteParts(); ok {
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return m.remote.Open(ctx, bucket, key)
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} else if path, ok := loc.LocalParts(); ok {
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return m.local.Open(ctx, path)
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}
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return newStdMultiReadHandle(ctx.Stdin()), nil
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}
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// Create returns a WriteHandle to either a local file, remote object, or stdout.
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func (m *Mixed) Create(ctx clingy.Context, loc ulloc.Location) (MultiWriteHandle, error) {
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if bucket, key, ok := loc.RemoteParts(); ok {
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return m.remote.Create(ctx, bucket, key)
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} else if path, ok := loc.LocalParts(); ok {
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return m.local.Create(ctx, path)
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}
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return newStdMultiWriteHandle(ctx.Stdout()), nil
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}
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// Move moves either a local file or remote object.
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func (m *Mixed) Move(ctx clingy.Context, source, dest ulloc.Location) error {
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if oldbucket, oldkey, ok := source.RemoteParts(); ok {
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if newbucket, newkey, ok := dest.RemoteParts(); ok {
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return m.remote.Move(ctx, oldbucket, oldkey, newbucket, newkey)
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}
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} else if oldpath, ok := source.LocalParts(); ok {
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if newpath, ok := dest.LocalParts(); ok {
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return m.local.Move(ctx, oldpath, newpath)
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}
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}
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return errs.New("moving objects between local and remote is not supported")
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}
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// Remove deletes either a local file or remote object.
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func (m *Mixed) Remove(ctx context.Context, loc ulloc.Location, opts *RemoveOptions) error {
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if bucket, key, ok := loc.RemoteParts(); ok {
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return m.remote.Remove(ctx, bucket, key, opts)
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} else if path, ok := loc.LocalParts(); ok {
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return m.local.Remove(ctx, path, opts)
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}
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return nil
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}
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// List lists either files and directories with some local path prefix or remote objects
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// with a given bucket and key.
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func (m *Mixed) List(ctx context.Context, prefix ulloc.Location, opts *ListOptions) (ObjectIterator, error) {
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if bucket, key, ok := prefix.RemoteParts(); ok {
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return m.remote.List(ctx, bucket, key, opts), nil
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} else if path, ok := prefix.LocalParts(); ok {
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return m.local.List(ctx, path, opts)
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}
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return nil, errs.New("unable to list objects for prefix %q", prefix)
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}
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// IsLocalDir returns true if the location is a directory that is local.
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func (m *Mixed) IsLocalDir(ctx context.Context, loc ulloc.Location) bool {
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if path, ok := loc.LocalParts(); ok {
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return m.local.IsLocalDir(ctx, path)
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}
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return false
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}
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// Stat returns information about an object at the specified Location.
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func (m *Mixed) Stat(ctx context.Context, loc ulloc.Location) (*ObjectInfo, error) {
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if bucket, key, ok := loc.RemoteParts(); ok {
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return m.remote.Stat(ctx, bucket, key)
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} else if path, ok := loc.LocalParts(); ok {
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return m.local.Stat(ctx, path)
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}
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return nil, errs.New("unable to stat loc %q", loc.Loc())
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}
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