internal/lsp: return err if ExecuteCommand prerequisites aren't met

Some Commands require that the buffer is saved before running them (i.e.
generate, test and toggle details). If the buffer isn't saved gopls
sends a ShowMessage request to the client. Before this change it
did not return any error from the ExecuteCommand request itself (unless
ShowMessage failed).

A progress token can be provided by the client as a part of the
ExecuteCommand request, and that is, according to the LSP spec one way
to start a WorkDoneProgress. At this point the client expects
that gopls send progress updates.

With this change, ExecuteCommand now return an error if the buffer
isn't saved, so that the client know that it shouldn't expect any
progress updates with this specific token.

Change-Id: I8a7af20a0c1532fc4ad03efd4e04bfb1a6871644
Reviewed-on: https://go-review.googlesource.com/c/tools/+/248766
Run-TryBot: Pontus Leitzler <leitzler@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
1 file changed
tree: 9407f3b1946e9b75e5b0be1791c281157f36745d
  1. benchmark/
  2. blog/
  3. cmd/
  4. container/
  5. cover/
  6. go/
  7. godoc/
  8. gopls/
  9. imports/
  10. internal/
  11. playground/
  12. present/
  13. refactor/
  14. txtar/
  15. .gitattributes
  16. .gitignore
  17. .prettierrc
  18. AUTHORS
  19. codereview.cfg
  20. CONTRIBUTING.md
  21. CONTRIBUTORS
  22. go.mod
  23. go.sum
  24. LICENSE
  25. PATENTS
  26. README.md
README.md

Go Tools

This subrepository holds the source for various packages and tools that support the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.

Others, including the Go guru and the test coverage tool, can be fetched with go get.

Packages include a type-checker for Go and an implementation of the Static Single Assignment form (SSA) representation for Go programs.

Download/Install

The easiest way to install is to run go get -u golang.org/x/tools/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/tools.

JS/CSS Formatting

This repository uses prettier to format JS and CSS files.

The version of prettier used is 1.18.2.

It is encouraged that all JS and CSS code be run through this before submitting a change. However, it is not a strict requirement enforced by CI.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the tools repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/tools/(your subdir):” in the subject line, so it is easy to find.