mirror of
https://github.com/golang/go
synced 2024-10-01 09:38:36 -06:00
4457e4cfd4
This uses the new opencensus compatability layer to add telementry to some of the functions in the lsp, in order to allow us to understand their costs and call patterns. Change-Id: I7df820cd4eace7a4840ac6397d5df402369bf0a7 Reviewed-on: https://go-review.googlesource.com/c/tools/+/183419 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package cache
|
|
|
|
import (
|
|
"context"
|
|
"io/ioutil"
|
|
"os"
|
|
|
|
"golang.org/x/tools/internal/lsp/source"
|
|
"golang.org/x/tools/internal/lsp/telemetry/trace"
|
|
"golang.org/x/tools/internal/span"
|
|
)
|
|
|
|
// nativeFileSystem implements FileSystem reading from the normal os file system.
|
|
type nativeFileSystem struct{}
|
|
|
|
// nativeFileHandle implements FileHandle for nativeFileSystem
|
|
type nativeFileHandle struct {
|
|
fs *nativeFileSystem
|
|
identity source.FileIdentity
|
|
}
|
|
|
|
func (fs *nativeFileSystem) GetFile(uri span.URI) source.FileHandle {
|
|
version := "DOES NOT EXIST"
|
|
if fi, err := os.Stat(uri.Filename()); err == nil {
|
|
version = fi.ModTime().String()
|
|
}
|
|
return &nativeFileHandle{
|
|
fs: fs,
|
|
identity: source.FileIdentity{
|
|
URI: uri,
|
|
Version: version,
|
|
},
|
|
}
|
|
}
|
|
|
|
func (h *nativeFileHandle) FileSystem() source.FileSystem {
|
|
return h.fs
|
|
}
|
|
|
|
func (h *nativeFileHandle) Identity() source.FileIdentity {
|
|
return h.identity
|
|
}
|
|
|
|
func (h *nativeFileHandle) Kind() source.FileKind {
|
|
// TODO: How should we determine the file kind?
|
|
return source.Go
|
|
}
|
|
|
|
func (h *nativeFileHandle) Read(ctx context.Context) ([]byte, string, error) {
|
|
ctx, ts := trace.StartSpan(ctx, "cache.nativeFileHandle.Read")
|
|
defer ts.End()
|
|
//TODO: this should fail if the version is not the same as the handle
|
|
data, err := ioutil.ReadFile(h.identity.URI.Filename())
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
return data, hashContents(data), nil
|
|
}
|