blob: 65b079e4dec334fc3af79788aac3217942d23663 [file] [log] [blame]
// 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 lsp implements LSP for gopls.
package lsp
import (
"context"
"fmt"
"sync"
"golang.org/x/tools/internal/jsonrpc2"
"golang.org/x/tools/internal/lsp/mod"
"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"
)
const concurrentAnalyses = 1
// NewServer creates an LSP server and binds it to handle incoming client
// messages on on the supplied stream.
func NewServer(session source.Session, client protocol.Client) *Server {
return &Server{
delivered: make(map[span.URI]sentDiagnostics),
session: session,
client: client,
diagnosticsSema: make(chan struct{}, concurrentAnalyses),
}
}
type serverState int
const (
serverCreated = serverState(iota)
serverInitializing // set once the server has received "initialize" request
serverInitialized // set once the server has received "initialized" request
serverShutDown
)
func (s serverState) String() string {
switch s {
case serverCreated:
return "created"
case serverInitializing:
return "initializing"
case serverInitialized:
return "initialized"
case serverShutDown:
return "shutDown"
}
return fmt.Sprintf("(unknown state: %d)", int(s))
}
// Server implements the protocol.Server interface.
type Server struct {
client protocol.Client
stateMu sync.Mutex
state serverState
session source.Session
// changedFiles tracks files for which there has been a textDocument/didChange.
changedFiles map[span.URI]struct{}
// folders is only valid between initialize and initialized, and holds the
// set of folders to build views for when we are ready
pendingFolders []protocol.WorkspaceFolder
// delivered is a cache of the diagnostics that the server has sent.
deliveredMu sync.Mutex
delivered map[span.URI]sentDiagnostics
// diagnosticsSema limits the concurrency of diagnostics runs, which can be expensive.
diagnosticsSema chan struct{}
// supportsWorkDoneProgress is set in the initializeRequest
// to determine if the client can support progress notifications
supportsWorkDoneProgress bool
inProgressMu sync.Mutex
inProgress map[string]func()
}
// sentDiagnostics is used to cache diagnostics that have been sent for a given file.
type sentDiagnostics struct {
version float64
identifier string
sorted []*source.Diagnostic
withAnalysis bool
snapshotID uint64
}
func (s *Server) codeLens(ctx context.Context, params *protocol.CodeLensParams) ([]protocol.CodeLens, error) {
snapshot, fh, ok, err := s.beginFileRequest(params.TextDocument.URI, source.UnknownKind)
if !ok {
return nil, err
}
switch fh.Identity().Kind {
case source.Mod:
return mod.CodeLens(ctx, snapshot, fh.Identity().URI)
case source.Go:
return source.CodeLens(ctx, snapshot, fh)
}
// Unsupported file kind for a code action.
return nil, nil
}
func (s *Server) nonstandardRequest(ctx context.Context, method string, params interface{}) (interface{}, error) {
paramMap := params.(map[string]interface{})
if method == "gopls/diagnoseFiles" {
for _, file := range paramMap["files"].([]interface{}) {
snapshot, fh, ok, err := s.beginFileRequest(protocol.DocumentURI(file.(string)), source.UnknownKind)
if !ok {
return nil, err
}
fileID, diagnostics, err := source.FileDiagnostics(ctx, snapshot, fh.Identity().URI)
if err != nil {
return nil, err
}
if err := s.client.PublishDiagnostics(ctx, &protocol.PublishDiagnosticsParams{
URI: protocol.URIFromSpanURI(fh.Identity().URI),
Diagnostics: toProtocolDiagnostics(diagnostics),
Version: fileID.Version,
}); err != nil {
return nil, err
}
}
if err := s.client.PublishDiagnostics(ctx, &protocol.PublishDiagnosticsParams{
URI: "gopls://diagnostics-done",
}); err != nil {
return nil, err
}
return struct{}{}, nil
}
return nil, notImplemented(method)
}
func (s *Server) workDoneProgressCancel(ctx context.Context, params *protocol.WorkDoneProgressCancelParams) error {
token, ok := params.Token.(string)
if !ok {
return errors.Errorf("expected params.Token to be string but got %T", params.Token)
}
s.inProgressMu.Lock()
defer s.inProgressMu.Unlock()
cancel, ok := s.inProgress[token]
if !ok {
return errors.Errorf("token %q not found in progress", token)
}
cancel()
return nil
}
func (s *Server) clearInProgress(token string) {
s.inProgressMu.Lock()
delete(s.inProgress, token)
s.inProgressMu.Unlock()
}
func notImplemented(method string) error {
return fmt.Errorf("%w: %q not yet implemented", jsonrpc2.ErrMethodNotFound, method)
}
//go:generate helper/helper -d protocol/tsserver.go -o server_gen.go -u .