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Alan Donovan ce26db4201 go/analysis: add Pass.TypeErrors field
The result of type checking is a package (types.Package), type
annotations on syntax trees (types.Info), and zero or more type
errors (types.Error).  Hitherto we had assumed that analyzers don't
need access to type errors, but in fact it turns out to be useful:
for example, analyzers can look at broken code and suggest quick
fixes to repair the mistakes.

This change adds a Pass.TypeErrors field that holds the errors
produced during type checking. It may be non-nil only when the
Analyzer.RunDespiteErrors flag was enabled. Similarly, it adds
a TypeErrors field to go/packages.Package.
(The existing Packages.Error field loses important details.)

Gopls was already using analyzers in this way, (ab)using its privileged
position in the x/tools repo. This change removes the need for such hacks.

We expect that all analysis drivers that support RunDespiteErrors will
in due course populate the Pass.TypesErrors field. This change updates
the go/packages-based driver to do so; no changes were needed to
unitchecker since it does not support RunDespiteErrors.
In the meantime, not populating this field is not expected to cause
any compatibility problems.

Fixes golang/go#54619

Change-Id: Ia7c72242e332782e8919a4c30b2107c37bcec9ab
Reviewed-on: https://go-review.googlesource.com/c/tools/+/425095
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Run-TryBot: Alan Donovan <adonovan@google.com>
Reviewed-by: Tim King <taking@google.com>
2022-11-16 21:35:14 +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 cmd/stringer: replace ioutil with os 2022-11-11 15:19:20 +00:00
container/intsets all: remove redundant type conversion 2022-09-07 17:33:19 +00:00
copyright gopls: migrate internal/lsp to gopls/internal/lsp 2022-09-07 16:44:44 +00:00
cover cover: add function to parse profiles from an io.Reader 2021-10-05 03:23:35 +00:00
go go/analysis: add Pass.TypeErrors field 2022-11-16 21:35:14 +00:00
godoc godoc: fix some comments 2022-10-04 18:24:48 +00:00
gopls go/analysis: add Pass.TypeErrors field 2022-11-16 21:35:14 +00:00
imports all: gofmt 2022-04-12 17:53:17 +00:00
internal go/analysis: add Pass.TypeErrors field 2022-11-16 21:35:14 +00:00
playground playground: remove /share registration, add Proxy 2021-02-25 15:03:53 +00:00
present all: fix a few function names on comments 2022-10-10 13:22:38 +00:00
refactor refactor/satisfy: fix visiting functions in the unsafe package 2022-10-17 12:57:23 +00:00
txtar all: gofmt 2022-04-12 17:53:17 +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
CONTRIBUTING.md CONTRIBUTING.md: remove note about not accepting Pull Requests 2018-03-14 18:02:17 +00:00
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 README: format install command 2022-10-12 14:51:54 +00:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00
go.mod go.mod: update golang.org/x dependencies 2022-11-09 17:16:50 +00:00
go.sum go.mod: update golang.org/x dependencies 2022-11-09 17:16:50 +00:00

README.md

Go Tools

PkgGoDev

This repository provides the golang.org/x/tools module, comprising various tools and packages mostly for static analysis of Go programs, some of which are listed below. Use the "Go reference" link above for more information about any package.

It also contains the golang.org/x/tools/gopls module, whose root package is a language-server protocol (LSP) server for Go. An LSP server analyses the source code of a project and responds to requests from a wide range of editors such as VSCode and Vim, allowing them to support IDE-like functionality.

Selected commands:

  • cmd/goimports formats a Go program like go fmt and additionally inserts import statements for any packages required by the file after it is edited.
  • cmd/callgraph prints the call graph of a Go program.
  • cmd/digraph is a utility for manipulating directed graphs in textual notation.
  • cmd/stringer generates declarations (including a String method) for "enum" types.
  • cmd/toolstash is a utility to simplify working with multiple versions of the Go toolchain.

These commands may be fetched with a command such as

go install golang.org/x/tools/cmd/goimports@latest

Selected packages:

  • go/ssa provides a static single-assignment form (SSA) intermediate representation (IR) for Go programs, similar to a typical compiler, for use by analysis tools.

  • go/packages provides a simple interface for loading, parsing, and type checking a complete Go program from source code.

  • go/analysis provides a framework for modular static analysis of Go programs.

  • go/callgraph provides call graphs of Go programs using a variety of algorithms with different trade-offs.

  • go/ast/inspector provides an optimized means of traversing a Go parse tree for use in analysis tools.

  • go/cfg provides a simple control-flow graph (CFG) for a Go function.

  • go/expect reads Go source files used as test inputs and interprets special comments within them as queries or assertions for testing.

  • go/gcexportdata and go/gccgoexportdata read and write the binary files containing type information used by the standard and gccgo compilers.

  • go/types/objectpath provides a stable naming scheme for named entities ("objects") in the go/types API.

Numerous other packages provide more esoteric functionality.

Contributing

This repository uses Gerrit for code changes. To learn how to submit changes, 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.

JavaScript and 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.