internal/lsp/regtest: implement formatting and organizeImports

Add two new fake editor commands: Formatting and OrganizeImports, which
delegate to textDocument/formatting and textDocument/codeAction
respectively. Use this in simple regtests, as well as on save.

Implementing this required fixing a broken assumption about text edits
in the editor: previously these edits were incrementally mutating the
buffer, but the correct implementation should simultaneously mutate the
buffer (i.e., all positions in an edit set refer to the starting buffer
state). This never mattered before because we were only operating on one
edit at a time.

Updates golang/go#36879

Change-Id: I6dec343c4e202288fa20c26df2fbafe9340a1bce
Reviewed-on: https://go-review.googlesource.com/c/tools/+/221539
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rohan Challa <rohan@golang.org>
7 files changed
tree: 4a0cbc967d9e69accbd05afb2e1bcaafc6c11eda
  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. AUTHORS
  18. codereview.cfg
  19. CONTRIBUTING.md
  20. CONTRIBUTORS
  21. go.mod
  22. go.sum
  23. LICENSE
  24. PATENTS
  25. 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.

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.