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pjw dbc8747628 internal/lsp/semantic: avoid doing semantic tokens for large files 
LSP (and gopls) support both full-file semantic token requests and
requests for just a range, typically roughly what's visible to the user.
It can be slow to produce the full set for a very large file, so
this code now responds with an error if the file is bigger than
100,000 bytes. After getting this error, vscode, at least,
will stop asking for full requests and use range requests.

Alternatively, server capabilities could say gopls never responds to
full-file requests, but doing that doesn't stop vscode from asking for
them. Another possibility would be to fix a time limit (like 8ms) for
how long to spend generating full-file semantic tokens. That's tricky
to get right, but one could instead generate an error when there
are more than 4,000 semantic tokens (on my laptop, that's about 8ms.)

Large files are unusual; a simple size limit seems adequate for now.

Change-Id: Ieea0d16aad6e37cc4f14b1a6a7116a4e41197aae
Reviewed-on: https://go-review.googlesource.com/c/tools/+/307729
Run-TryBot: Peter Weinberger <pjw@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Peter Weinberger <pjw@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
 		2021-04-20 17:53:17 +00:00
benchmark/parse benchmark/parse: add unit test for String function 2019-12-16 21:43:19 +00:00
blog copyright: test that all files in the repo have copyright notices 2021-01-11 22:19:46 +00:00
cmd godoc/static: link to golang.org for content moved out of Go root 2021-03-30 17:48:30 +00:00
container/intsets all: go fmt ./... 2021-02-20 03:28:52 +00:00
copyright copyright: test that all files in the repo have copyright notices 2021-01-11 22:19:46 +00:00
cover cover: fix sorting of profile segment boundaries 2020-09-16 14:01:29 +00:00
go go/tools: add vet check for direct comparion of reflect.Values 2021-04-08 02:08:45 +00:00
godoc godoc/static: link to golang.org for content moved out of Go root 2021-03-30 17:48:30 +00:00
gopls internal/lsp/source: fix Deref function for cyclic types 2021-04-16 18:23:08 +00:00
imports all: add copyright notices to files that are missing them 2021-01-06 17:23:47 +00:00
internal internal/lsp/semantic: avoid doing semantic tokens for large files 2021-04-20 17:53:17 +00:00
playground playground: remove /share registration, add Proxy 2021-02-25 15:03:53 +00:00
present present: don't drop commands that immediately follow text 2021-03-19 17:28:02 +00:00
refactor all: go fmt ./... 2021-02-20 03:28:52 +00:00
txtar txtar: minor fix in unit test input 2021-02-18 20:23:11 +00:00
.gitattributes tools: copying .gitattributes to all subrepositories (fixes windows build) 2014-12-23 06:32:51 +00:00
.gitignore .gitignore: roll back ".gitignore: ignore emacs backup files" 2018-02-13 00:43:28 +00:00
.prettierrc all: add a section on JS/CSS formatting to README 2020-05-28 15:31:34 +00:00
AUTHORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
CONTRIBUTING.md CONTRIBUTING.md: remove note about not accepting Pull Requests 2018-03-14 18:02:17 +00:00
CONTRIBUTORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
LICENSE LICENSE: add 2012-03-17 15:20:58 +11:00
PATENTS go.empty: add PATENTS file to the subrepo. 2012-04-16 11:24:04 +10:00
README.md tools, gopls: add pkg.go.dev badges to READMEs 2020-12-03 23:01:54 +00:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00
go.mod all: upgrade all dependencies except for go-diff 2021-04-09 16:31:56 +00:00
go.sum all: upgrade all dependencies except for go-diff 2021-04-09 16:31:56 +00:00

README.md

Go Tools

PkgGoDev

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.