mirror of
https://github.com/golang/go
synced 2024-10-01 09:38:36 -06:00
2c3de6a5ae
We split aquiring a "handle" from reading a files contents so that we can do the former eagerly and the latter lazily. We also "version" the handles so that the same file at different versions is a different handle. Change-Id: I06cc346d4b4c77d784aa454702c54689f2f177e0 Reviewed-on: https://go-review.googlesource.com/c/tools/+/179917 Reviewed-by: Rebecca Stambler <rstambler@golang.org>
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cache
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import (
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"context"
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"io/ioutil"
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"golang.org/x/tools/internal/lsp/source"
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"golang.org/x/tools/internal/span"
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)
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// nativeFileSystem implements FileSystem reading from the normal os file system.
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type nativeFileSystem struct{}
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// nativeFileHandle implements FileHandle for nativeFileSystem
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type nativeFileHandle struct {
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fs *nativeFileSystem
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identity source.FileIdentity
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}
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func (fs *nativeFileSystem) GetFile(uri span.URI) source.FileHandle {
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return &nativeFileHandle{
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fs: fs,
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identity: source.FileIdentity{
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URI: uri,
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// TODO: decide what the version string is for a native file system
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// could be the mtime?
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Version: "",
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},
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}
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}
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func (h *nativeFileHandle) FileSystem() source.FileSystem {
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return h.fs
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}
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func (h *nativeFileHandle) Identity() source.FileIdentity {
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return h.identity
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}
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func (h *nativeFileHandle) Read(ctx context.Context) *source.FileContent {
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r := &source.FileContent{}
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filename, err := h.identity.URI.Filename()
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if err != nil {
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r.Error = err
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return r
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}
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r.Data, r.Error = ioutil.ReadFile(filename)
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if r.Error != nil {
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r.Hash = hashContents(r.Data)
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}
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return r
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}
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