return buildID[strings.LastIndex(buildID, buildIDSeparator)+1:]
}

// toolID returns the unique ID to use for the current copy of the
// named tool (asm, compile, cover, link).
//
// It is important that if the tool changes (for example a compiler bug is fixed
// and the compiler reinstalled), toolID returns a different string, so that old
// package archives look stale and are rebuilt (with the fixed compiler).

	if cfg.BuildToolchainName == "gccgo" {
		env = append(env, "GCCGO="+BuildToolchain.compiler())
	}

	p := a.Package
	tool := VetTool
	if tool == "" {
		tool = base.Tool("vet")
	}
	runErr := sh.run(p.Dir, p.ImportPath, env, cfg.BuildToolexec, tool, vetFlags, a.Objdir+"vet.cfg")

	// If vet wrote export data, save it for input to future vets.
	if f, err := os.Open(vcfg.VetxOutput); err == nil {

	backgroundSh *Shell // Shell that per-Action Shells are derived from

	exec      sync.Mutex
	readySema chan bool
	ready     actionQueue

	id           sync.Mutex
	toolIDCache  map[string]string // tool name -> tool ID
	buildIDCache map[string]string // file name -> build ID
}

// NOTE: Much of Action would not need to be exported if not for test.
// Maybe test functionality should move into this package too?

var CmdTool = &base.Command{
	Run:       runTool,
	UsageLine: "go tool [-n] command [args...]",
	Short:     "run specified go tool",
	Long: `
Tool runs the go tool command identified by the arguments.
With no arguments it prints the list of known tools.

The -n flag causes tool to print the command that would be
executed but not execute it.

For more about each tool command, see 'go doc cmd/<command>'.
`,
}

var toolN bool

	_ "github.com/jcchavezs/porto/cmd/porto"
	_ "honnef.co/go/tools/cmd/staticcheck"
	_ "sigs.k8s.io/logtools/logcheck"

	// benchmarking tools
	_ "github.com/cespare/prettybench"
	_ "gotest.tools/gotestsum"

	// mockgen
	_ "go.uber.org/mock/mockgen"

	// tools like cpu
	_ "go.uber.org/automaxprocs"

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build tools

package tools

// Arrange to vendor the bisect command for use
// by the internal/godebug package test.

//go:build tools
// +build tools

/*
Copyright 2019 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,

//go:build tools
// +build tools

/*
Copyright 2019 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,

## Tools {#tools}

### Go command {#go-command}

Setting the `GOROOT_FINAL` environment variable no longer has an effect
([#62047](/issue/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.

<!-- go.dev/issue/34208, CL 563137, CL 586095 -->
The new `go` `env` `-changed` flag causes the command to print only

## Tools {#tools}

### Go command {#go-command}