blob: 959a2a51be40658b842a96d552255062a3f777b3 [file] [log] [blame]
// Copyright 2020 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
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"path/filepath"
"golang.org/x/tools/internal/event"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/lsp/source"
"golang.org/x/tools/internal/span"
"golang.org/x/tools/internal/xcontext"
errors "golang.org/x/xerrors"
)
func (s *Server) executeCommand(ctx context.Context, params *protocol.ExecuteCommandParams) (interface{}, error) {
var command *source.Command
for _, c := range source.Commands {
if c.ID() == params.Command {
command = c
break
}
}
if command == nil {
return nil, fmt.Errorf("no known command")
}
var match bool
for _, name := range s.session.Options().SupportedCommands {
if command.ID() == name {
match = true
break
}
}
if !match {
return nil, fmt.Errorf("%s is not a supported command", command.ID())
}
title := command.Title
if title == "" {
title = command.Name
}
// Some commands require that all files are saved to disk. If we detect
// unsaved files, warn the user instead of running the commands.
unsaved := false
for _, overlay := range s.session.Overlays() {
if !overlay.Saved() {
unsaved = true
break
}
}
if unsaved {
switch params.Command {
case source.CommandTest.ID(), source.CommandGenerate.ID(), source.CommandToggleDetails.ID():
// TODO(PJW): for Toggle, not an error if it is being disabled
err := errors.New("unsaved files in the view")
s.showCommandError(ctx, title, err)
return nil, err
}
}
// If the command has a suggested fix function available, use it and apply
// the edits to the workspace.
if command.IsSuggestedFix() {
err := s.runSuggestedFixCommand(ctx, command, params.Arguments)
if err != nil {
s.showCommandError(ctx, title, err)
}
return nil, err
}
ctx, cancel := context.WithCancel(xcontext.Detach(ctx))
// Start progress prior to spinning off a goroutine specifically so that
// clients are aware of the work item before the command completes. This
// matters for regtests, where having a continuous thread of work is
// convenient for assertions.
work := s.progress.start(ctx, title, "Running...", params.WorkDoneToken, cancel)
if command.Synchronous {
return nil, s.runCommand(ctx, work, command, params.Arguments)
}
go func() {
defer cancel()
err := s.runCommand(ctx, work, command, params.Arguments)
switch {
case errors.Is(err, context.Canceled):
work.end(title + ": canceled")
case err != nil:
event.Error(ctx, fmt.Sprintf("%s: command error", title), err)
work.end(title + ": failed")
// Show a message when work completes with error, because the progress end
// message is typically dismissed immediately by LSP clients.
s.showCommandError(ctx, title, err)
default:
work.end(command.ID() + ": completed")
}
}()
return nil, nil
}
func (s *Server) runSuggestedFixCommand(ctx context.Context, command *source.Command, args []json.RawMessage) error {
var uri protocol.DocumentURI
var rng protocol.Range
if err := source.UnmarshalArgs(args, &uri, &rng); err != nil {
return err
}
snapshot, fh, ok, release, err := s.beginFileRequest(ctx, uri, source.Go)
defer release()
if !ok {
return err
}
edits, err := command.SuggestedFix(ctx, snapshot, fh, rng)
if err != nil {
return err
}
r, err := s.client.ApplyEdit(ctx, &protocol.ApplyWorkspaceEditParams{
Edit: protocol.WorkspaceEdit{
DocumentChanges: edits,
},
})
if err != nil {
return err
}
if !r.Applied {
return errors.New(r.FailureReason)
}
return nil
}
func (s *Server) showCommandError(ctx context.Context, title string, err error) {
// Command error messages should not be cancelable.
ctx = xcontext.Detach(ctx)
if err := s.client.ShowMessage(ctx, &protocol.ShowMessageParams{
Type: protocol.Error,
Message: fmt.Sprintf("%s failed: %v", title, err),
}); err != nil {
event.Error(ctx, title+": failed to show message", err)
}
}
func (s *Server) runCommand(ctx context.Context, work *workDone, command *source.Command, args []json.RawMessage) error {
switch command {
case source.CommandTest:
var uri protocol.DocumentURI
var tests, benchmarks []string
if err := source.UnmarshalArgs(args, &uri, &tests, &benchmarks); err != nil {
return err
}
snapshot, _, ok, release, err := s.beginFileRequest(ctx, uri, source.UnknownKind)
defer release()
if !ok {
return err
}
return s.runTests(ctx, snapshot, uri, work, tests, benchmarks)
case source.CommandGenerate:
var uri protocol.DocumentURI
var recursive bool
if err := source.UnmarshalArgs(args, &uri, &recursive); err != nil {
return err
}
snapshot, _, ok, release, err := s.beginFileRequest(ctx, uri, source.UnknownKind)
defer release()
if !ok {
return err
}
return s.runGoGenerate(ctx, snapshot, uri.SpanURI(), recursive, work)
case source.CommandRegenerateCgo:
var uri protocol.DocumentURI
if err := source.UnmarshalArgs(args, &uri); err != nil {
return err
}
mod := source.FileModification{
URI: uri.SpanURI(),
Action: source.InvalidateMetadata,
}
return s.didModifyFiles(ctx, []source.FileModification{mod}, FromRegenerateCgo)
case source.CommandTidy, source.CommandVendor:
var uri protocol.DocumentURI
if err := source.UnmarshalArgs(args, &uri); err != nil {
return err
}
// The flow for `go mod tidy` and `go mod vendor` is almost identical,
// so we combine them into one case for convenience.
a := "tidy"
if command == source.CommandVendor {
a = "vendor"
}
return s.directGoModCommand(ctx, uri, "mod", []string{a}...)
case source.CommandUpgradeDependency:
var uri protocol.DocumentURI
var goCmdArgs []string
if err := source.UnmarshalArgs(args, &uri, &goCmdArgs); err != nil {
return err
}
return s.directGoModCommand(ctx, uri, "get", goCmdArgs...)
case source.CommandToggleDetails:
var fileURI span.URI
if err := source.UnmarshalArgs(args, &fileURI); err != nil {
return err
}
pkgDir := span.URIFromPath(filepath.Dir(fileURI.Filename()))
s.gcOptimizationDetailsMu.Lock()
if _, ok := s.gcOptimizatonDetails[pkgDir]; ok {
delete(s.gcOptimizatonDetails, pkgDir)
} else {
s.gcOptimizatonDetails[pkgDir] = struct{}{}
}
s.gcOptimizationDetailsMu.Unlock()
// need to recompute diagnostics.
// so find the snapshot
sv, err := s.session.ViewOf(fileURI)
if err != nil {
return err
}
snapshot, release := sv.Snapshot(ctx)
defer release()
s.diagnoseSnapshot(snapshot, nil)
case source.CommandGenerateGoplsMod:
var v source.View
if len(args) == 0 {
views := s.session.Views()
if len(views) != 1 {
return fmt.Errorf("cannot resolve view: have %d views", len(views))
}
v = views[0]
} else {
var uri protocol.DocumentURI
if err := source.UnmarshalArgs(args, &uri); err != nil {
return err
}
var err error
v, err = s.session.ViewOf(uri.SpanURI())
if err != nil {
return err
}
}
snapshot, release := v.Snapshot(ctx)
defer release()
modFile, err := snapshot.BuildWorkspaceModFile(ctx)
if err != nil {
return errors.Errorf("getting workspace mod file: %w", err)
}
content, err := modFile.Format()
if err != nil {
return errors.Errorf("formatting mod file: %w", err)
}
filename := filepath.Join(v.Folder().Filename(), "gopls.mod")
if err := ioutil.WriteFile(filename, content, 0644); err != nil {
return errors.Errorf("writing mod file: %w", err)
}
default:
return fmt.Errorf("unsupported command: %s", command.ID())
}
return nil
}
func (s *Server) directGoModCommand(ctx context.Context, uri protocol.DocumentURI, verb string, args ...string) error {
view, err := s.session.ViewOf(uri.SpanURI())
if err != nil {
return err
}
wdir := filepath.Dir(uri.SpanURI().Filename())
snapshot, release := view.Snapshot(ctx)
defer release()
return snapshot.RunGoCommandDirect(ctx, wdir, verb, args)
}
func (s *Server) runTests(ctx context.Context, snapshot source.Snapshot, uri protocol.DocumentURI, work *workDone, tests, benchmarks []string) error {
pkgs, err := snapshot.PackagesForFile(ctx, uri.SpanURI(), source.TypecheckWorkspace)
if err != nil {
return err
}
if len(pkgs) == 0 {
return fmt.Errorf("package could not be found for file: %s", uri.SpanURI().Filename())
}
pkgPath := pkgs[0].PkgPath()
// create output
buf := &bytes.Buffer{}
ew := &eventWriter{ctx: ctx, operation: "test"}
out := io.MultiWriter(ew, workDoneWriter{work}, buf)
wdir := filepath.Dir(uri.SpanURI().Filename())
// Run `go test -run Func` on each test.
var failedTests int
for _, funcName := range tests {
args := []string{pkgPath, "-v", "-count=1", "-run", fmt.Sprintf("^%s$", funcName)}
if err := snapshot.RunGoCommandPiped(ctx, wdir, "test", args, out, out); err != nil {
if errors.Is(err, context.Canceled) {
return err
}
failedTests++
}
}
// Run `go test -run=^$ -bench Func` on each test.
var failedBenchmarks int
for _, funcName := range benchmarks {
args := []string{pkgPath, "-v", "-run=^$", "-bench", fmt.Sprintf("^%s$", funcName)}
if err := snapshot.RunGoCommandPiped(ctx, wdir, "test", args, out, out); err != nil {
if errors.Is(err, context.Canceled) {
return err
}
failedBenchmarks++
}
}
var title string
if len(tests) > 0 && len(benchmarks) > 0 {
title = "tests and benchmarks"
} else if len(tests) > 0 {
title = "tests"
} else if len(benchmarks) > 0 {
title = "benchmarks"
} else {
return errors.New("No functions were provided")
}
message := fmt.Sprintf("all %s passed", title)
if failedTests > 0 && failedBenchmarks > 0 {
message = fmt.Sprintf("%d / %d tests failed and %d / %d benchmarks failed", failedTests, len(tests), failedBenchmarks, len(benchmarks))
} else if failedTests > 0 {
message = fmt.Sprintf("%d / %d tests failed", failedTests, len(tests))
} else if failedBenchmarks > 0 {
message = fmt.Sprintf("%d / %d benchmarks failed", failedBenchmarks, len(benchmarks))
}
messageType := protocol.Info
if failedTests > 0 || failedBenchmarks > 0 {
messageType = protocol.Error
message += "\n" + buf.String()
}
return s.client.ShowMessage(ctx, &protocol.ShowMessageParams{
Type: messageType,
Message: message,
})
}
func (s *Server) runGoGenerate(ctx context.Context, snapshot source.Snapshot, dir span.URI, recursive bool, work *workDone) error {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
er := &eventWriter{ctx: ctx, operation: "generate"}
args := []string{"-x"}
pattern := "."
if recursive {
pattern = "..."
}
args = append(args, pattern)
stderr := io.MultiWriter(er, workDoneWriter{work})
if err := snapshot.RunGoCommandPiped(ctx, dir.Filename(), "generate", args, er, stderr); err != nil {
return err
}
return nil
}