blob: 613f8097f90f4af446c3910c0541db952f388848 [file] [log] [blame]
// 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"
"go/ast"
"go/types"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/lsp/source"
"golang.org/x/tools/internal/span"
errors "golang.org/x/xerrors"
)
// pkg contains the type information needed by the source package.
type pkg struct {
// ID and package path have their own types to avoid being used interchangeably.
id packageID
pkgPath packagePath
mode source.ParseMode
files []source.ParseGoHandle
errors []*source.Error
imports map[packagePath]*pkg
types *types.Package
typesInfo *types.Info
typesSizes types.Sizes
}
// Declare explicit types for package paths and IDs to ensure that we never use
// an ID where a path belongs, and vice versa. If we confused the two, it would
// result in confusing errors because package IDs often look like package paths.
type packageID string
type packagePath string
func (p *pkg) ID() string {
return string(p.id)
}
func (p *pkg) PkgPath() string {
return string(p.pkgPath)
}
func (p *pkg) Files() []source.ParseGoHandle {
return p.files
}
func (p *pkg) File(uri span.URI) (source.ParseGoHandle, error) {
for _, ph := range p.Files() {
if ph.File().Identity().URI == uri {
return ph, nil
}
}
return nil, errors.Errorf("no ParseGoHandle for %s", uri)
}
func (p *pkg) GetSyntax() []*ast.File {
var syntax []*ast.File
for _, ph := range p.files {
file, _, _, err := ph.Cached()
if err == nil {
syntax = append(syntax, file)
}
}
return syntax
}
func (p *pkg) GetErrors() []*source.Error {
return p.errors
}
func (p *pkg) GetTypes() *types.Package {
return p.types
}
func (p *pkg) GetTypesInfo() *types.Info {
return p.typesInfo
}
func (p *pkg) GetTypesSizes() types.Sizes {
return p.typesSizes
}
func (p *pkg) IsIllTyped() bool {
return p.types == nil || p.typesInfo == nil || p.typesSizes == nil
}
func (p *pkg) GetImport(pkgPath string) (source.Package, error) {
if imp := p.imports[packagePath(pkgPath)]; imp != nil {
return imp, nil
}
// Don't return a nil pointer because that still satisfies the interface.
return nil, errors.Errorf("no imported package for %s", pkgPath)
}
func (p *pkg) Imports() []source.Package {
var result []source.Package
for _, imp := range p.imports {
result = append(result, imp)
}
return result
}
func (s *snapshot) FindAnalysisError(ctx context.Context, id string, diag protocol.Diagnostic) (*source.Error, error) {
acts := s.getActionHandles(packageID(id), source.ParseFull)
for _, act := range acts {
errors, _, err := act.analyze(ctx)
if err != nil {
return nil, err
}
for _, err := range errors {
if err.Category != diag.Source {
continue
}
if err.Message != diag.Message {
continue
}
if protocol.CompareRange(err.Range, diag.Range) != 0 {
continue
}
return err, nil
}
}
return nil, errors.Errorf("no matching diagnostic for %v", diag)
}
func findFileInPackage(ctx context.Context, uri span.URI, pkg source.Package) (source.ParseGoHandle, source.Package, error) {
queue := []source.Package{pkg}
seen := make(map[string]bool)
for len(queue) > 0 {
pkg := queue[0]
queue = queue[1:]
seen[pkg.ID()] = true
for _, ph := range pkg.Files() {
if ph.File().Identity().URI == uri {
return ph, pkg, nil
}
}
for _, dep := range pkg.Imports() {
if !seen[dep.ID()] {
queue = append(queue, dep)
}
}
}
return nil, nil, errors.Errorf("no file for %s", uri)
}