go/doc/next/3-tools.md

2.8 KiB

Tools

Go command

Setting the GOROOT_FINAL environment variable no longer has an effect (#62047). Distributions that install the go command to a location other than $GOROOT/bin/go should install a symlink instead of relocating or copying the go binary.

The new go env -changed flag causes the command to print only those settings whose effective value differs from the default value that would be obtained in an empty environment with no prior uses of the -w flag.

The new go mod tidy -diff flag causes the command not to modify the files but instead print the necessary changes as a unified diff. It exits with a non-zero code if updates are needed.

The go list -m -json command now includes new Sum and GoModSum fields. This is similar to the existing behavior of the go mod download -json command.

The new go telemetry command should be documented here, as well as GOTELEMETRY and GOTELEMETRYDIR environment variables.

Vet

The go vet subcommand now includes the stdversion analyzer, which flags references to symbols that are too new for the version of Go in effect in the referring file. (The effective version is determined by the go directive in the file's enclosing go.mod file, and by any //go:build constraints in the file.)

For example, it will report a diagnostic for a reference to the reflect.TypeFor function (introduced in go1.22) from a file in a module whose go.mod file specifies go 1.21.

Cgo

[cmd/cgo] supports the new -ldflags flag for passing flags to the C linker. The go command uses it automatically, avoiding "argument list too long" errors with a very large CGO_LDFLAGS.