59 lines
1.7 KiB
Go
59 lines
1.7 KiB
Go
// +build linux darwin freebsd
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package continuityfs
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import (
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"io"
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"path/filepath"
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"github.com/containerd/continuity/driver"
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"github.com/opencontainers/go-digest"
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)
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// FileContentProvider is an object which is used to fetch
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// data and inode information about a path or digest.
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// TODO(dmcgowan): Update GetContentPath to provide a
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// filehandle or ReadWriteCloser.
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type FileContentProvider interface {
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Path(string, digest.Digest) (string, error)
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Open(string, digest.Digest) (io.ReadCloser, error)
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}
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type fsContentProvider struct {
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root string
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driver driver.Driver
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}
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// NewFSFileContentProvider creates a new content provider which
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// gets content from a directory on an existing filesystem based
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// on the resource path.
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func NewFSFileContentProvider(root string, driver driver.Driver) FileContentProvider {
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return &fsContentProvider{
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root: root,
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driver: driver,
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}
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}
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func (p *fsContentProvider) Path(path string, dgst digest.Digest) (string, error) {
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return filepath.Join(p.root, path), nil
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}
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func (p *fsContentProvider) Open(path string, dgst digest.Digest) (io.ReadCloser, error) {
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return p.driver.Open(filepath.Join(p.root, path))
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}
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