1package lsp
2
3import (
4	"context"
5
6	"golang.org/x/tools/internal/lsp/protocol"
7	"golang.org/x/tools/internal/lsp/source"
8	"golang.org/x/tools/internal/span"
9	errors "golang.org/x/xerrors"
10)
11
12func (s *Server) executeCommand(ctx context.Context, params *protocol.ExecuteCommandParams) (interface{}, error) {
13	switch params.Command {
14	case "tidy":
15		if len(params.Arguments) == 0 || len(params.Arguments) > 1 {
16			return nil, errors.Errorf("expected one file URI for call to `go mod tidy`, got %v", params.Arguments)
17		}
18		// Confirm that this action is being taken on a go.mod file.
19		uri := span.NewURI(params.Arguments[0].(string))
20		view, err := s.session.ViewOf(uri)
21		if err != nil {
22			return nil, err
23		}
24		f, err := view.GetFile(ctx, uri)
25		if err != nil {
26			return nil, err
27		}
28		fh := view.Snapshot().Handle(ctx, f)
29		if fh.Identity().Kind != source.Mod {
30			return nil, errors.Errorf("%s is not a mod file", uri)
31		}
32		// Run go.mod tidy on the view.
33		if err := source.ModTidy(ctx, view); err != nil {
34			return nil, err
35		}
36	}
37	return nil, nil
38}
39