mirror of
https://github.com/golang/go
synced 2024-11-18 20:44:45 -07:00
3744606dbb
This change moves gopls from type-checking packages using the go/packages API to type-checking from source. This is the first step in adding caching to gopls. Change-Id: I2a7dcfd8c9c0bfc6c35c86eadcdc6f9ce53d9be7 Reviewed-on: https://go-review.googlesource.com/c/161497 Reviewed-by: Ian Cottrell <iancottrell@google.com>
101 lines
2.1 KiB
Go
101 lines
2.1 KiB
Go
// Copyright 2018 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 (
|
|
"fmt"
|
|
"go/ast"
|
|
"go/token"
|
|
"io/ioutil"
|
|
|
|
"golang.org/x/tools/go/packages"
|
|
"golang.org/x/tools/internal/lsp/source"
|
|
)
|
|
|
|
// File holds all the information we know about a file.
|
|
type File struct {
|
|
URI source.URI
|
|
view *View
|
|
active bool
|
|
content []byte
|
|
ast *ast.File
|
|
token *token.File
|
|
pkg *packages.Package
|
|
}
|
|
|
|
// Read returns the contents of the file, reading it from file system if needed.
|
|
func (f *File) Read() ([]byte, error) {
|
|
f.view.mu.Lock()
|
|
defer f.view.mu.Unlock()
|
|
return f.read()
|
|
}
|
|
|
|
func (f *File) GetFileSet() (*token.FileSet, error) {
|
|
if f.view.Config.Fset == nil {
|
|
return nil, fmt.Errorf("no fileset for file view config")
|
|
}
|
|
return f.view.Config.Fset, nil
|
|
}
|
|
|
|
func (f *File) GetToken() (*token.File, error) {
|
|
f.view.mu.Lock()
|
|
defer f.view.mu.Unlock()
|
|
if f.token == nil {
|
|
if err := f.view.parse(f.URI); err != nil {
|
|
return nil, err
|
|
}
|
|
if f.token == nil {
|
|
return nil, fmt.Errorf("failed to find or parse %v", f.URI)
|
|
}
|
|
}
|
|
return f.token, nil
|
|
}
|
|
|
|
func (f *File) GetAST() (*ast.File, error) {
|
|
f.view.mu.Lock()
|
|
defer f.view.mu.Unlock()
|
|
if f.ast == nil {
|
|
if err := f.view.parse(f.URI); err != nil {
|
|
return nil, err
|
|
}
|
|
if f.ast == nil {
|
|
return nil, fmt.Errorf("failed to find or parse %v", f.URI)
|
|
}
|
|
}
|
|
return f.ast, nil
|
|
}
|
|
|
|
func (f *File) GetPackage() (*packages.Package, error) {
|
|
f.view.mu.Lock()
|
|
defer f.view.mu.Unlock()
|
|
if f.pkg == nil {
|
|
if err := f.view.parse(f.URI); err != nil {
|
|
return nil, err
|
|
}
|
|
if f.pkg == nil {
|
|
return nil, fmt.Errorf("failed to find or parse %v", f.URI)
|
|
}
|
|
}
|
|
return f.pkg, nil
|
|
}
|
|
|
|
// read is the internal part of Read that presumes the lock is already held
|
|
func (f *File) read() ([]byte, error) {
|
|
if f.content != nil {
|
|
return f.content, nil
|
|
}
|
|
// we don't know the content yet, so read it
|
|
filename, err := f.URI.Filename()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
content, err := ioutil.ReadFile(filename)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
f.content = content
|
|
return f.content, nil
|
|
}
|