blob: dd0bc73d46bf082fdd4b831df1fc09ed44af94fc [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 lsp
import (
"context"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/lsp/source"
"golang.org/x/tools/internal/lsp/telemetry"
"golang.org/x/tools/internal/span"
"golang.org/x/tools/internal/telemetry/log"
)
func (s *Server) didChangeWatchedFiles(ctx context.Context, params *protocol.DidChangeWatchedFilesParams) error {
for _, change := range params.Changes {
uri := span.NewURI(change.URI)
ctx := telemetry.File.With(ctx, uri)
for _, view := range s.session.Views() {
if !view.Options().WatchFileChanges {
continue
}
action := toFileAction(change.Type)
switch action {
case source.Change, source.Create:
// If client has this file open, don't do anything.
// The client's contents must remain the source of truth.
if s.session.IsOpen(uri) {
break
}
if s.session.DidChangeOutOfBand(ctx, uri, action) {
// If we had been tracking the given file,
// recompute diagnostics to reflect updated file contents.
f, err := view.GetFile(ctx, uri)
if err != nil {
return err
}
return s.diagnose(view.Snapshot(), f)
}
case source.Delete:
f := view.FindFile(ctx, uri)
// If we have never seen this file before, there is nothing to do.
if f == nil {
continue
}
snapshot := view.Snapshot()
fh := snapshot.Handle(ctx, f)
phs, err := snapshot.PackageHandles(ctx, fh)
if err != nil {
log.Error(ctx, "didChangeWatchedFiles: CheckPackageHandles", err, telemetry.File)
continue
}
ph, err := source.WidestCheckPackageHandle(phs)
if err != nil {
log.Error(ctx, "didChangeWatchedFiles: WidestCheckPackageHandle", err, telemetry.File)
continue
}
// Find a different file in the same package we can use to trigger diagnostics.
// TODO(rstambler): Allow diagnostics to be called per-package to avoid this.
var otherFile source.File
for _, pgh := range ph.CompiledGoFiles() {
if pgh.File().Identity().URI == f.URI() {
continue
}
if f := view.FindFile(ctx, pgh.File().Identity().URI); f != nil && s.session.IsOpen(f.URI()) {
otherFile = f
break
}
}
// Notify the view of the deletion of the file.
s.session.DidChangeOutOfBand(ctx, uri, action)
// If this was the only file in the package, clear its diagnostics.
if otherFile == nil {
if err := s.client.PublishDiagnostics(ctx, &protocol.PublishDiagnosticsParams{
URI: protocol.NewURI(uri),
Version: fh.Identity().Version,
}); err != nil {
log.Error(ctx, "failed to clear diagnostics", err, telemetry.URI.Of(uri))
}
return nil
}
// Refresh diagnostics for the package the file belonged to.
go s.diagnoseFile(view.Snapshot(), otherFile)
}
}
}
return nil
}
func toFileAction(ct protocol.FileChangeType) source.FileAction {
switch ct {
case protocol.Changed:
return source.Change
case protocol.Created:
return source.Create
case protocol.Deleted:
return source.Delete
}
return source.UnknownFileAction
}