all: go fmt std cmd (but revert vendor)

Make all our package sources use Go 1.17 gofmt format
(adding //go:build lines).

Part of //go:build change (#41184).
See https://golang.org/design/draft-gobuild

Change-Id: Ia0534360e4957e58cd9a18429c39d0e32a6addb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/294430
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/archive/tar/stat_actime1.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || linux || dragonfly || openbsd || solaris
 // +build aix linux dragonfly openbsd solaris
 
 package tar

src/archive/tar/stat_actime2.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || freebsd || netbsd
 // +build darwin freebsd netbsd
 
 package tar

src/archive/tar/stat_unix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || linux || darwin || dragonfly || freebsd || openbsd || netbsd || solaris
 // +build aix linux darwin dragonfly freebsd openbsd netbsd solaris
 
 package tar

src/bytes/boundary_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
+//go:build linux
 // +build linux
 
 package bytes_test

src/cmd/api/run.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ignore
 // +build ignore
 
 // The run program is invoked via the dist tool.

src/cmd/compile/internal/gc/bootstrap.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.8
 // +build !go1.8
 
 package gc

src/cmd/compile/internal/gc/pprof.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.8
 // +build go1.8
 
 package gc

src/cmd/compile/internal/gc/trace.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.7
 // +build go1.7
 
 package gc

src/cmd/compile/internal/ir/mknode.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ignore
 // +build ignore
 
 package main

src/cmd/compile/internal/logopt/escape.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.8
 // +build go1.8
 
 package logopt

src/cmd/compile/internal/logopt/escape_bootstrap.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.8
 // +build !go1.8
 
 package logopt

src/cmd/compile/internal/ssa/flags_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build amd64 || arm64
 // +build amd64 arm64
 
 package ssa

src/cmd/compile/internal/typecheck/mapfile_mmap.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd
 // +build darwin dragonfly freebsd linux netbsd openbsd
 
 package typecheck

src/cmd/compile/internal/typecheck/mapfile_read.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd
 // +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd
 
 package typecheck

src/cmd/compile/internal/typecheck/mkbuiltin.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ignore
 // +build ignore
 
 // Generate builtin.go from builtin/runtime.go.

src/cmd/compile/internal/types2/example_test.go

@@ -6,6 +6,7 @@
 // Only run where builders (build.golang.org) have
 // access to compiled packages for import.
 //
+//go:build !arm && !arm64
 // +build !arm,!arm64
 
 package types2_test

src/cmd/dist/sys_default.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !windows
 // +build !windows
 
 package main

src/cmd/dist/test_linux.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
 // +build linux
 
 package main

src/cmd/dist/util_gc.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !gccgo
 // +build !gccgo
 
 package main

src/cmd/dist/util_gccgo.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build gccgo
 // +build gccgo
 
 package main

src/cmd/go/go11.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.1
 // +build go1.1
 
 package main

src/cmd/go/go_unix_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package main_test

src/cmd/go/internal/base/signal_notunix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build plan9 || windows
 // +build plan9 windows
 
 package base

src/cmd/go/internal/base/signal_unix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || darwin || dragonfly || freebsd || js || linux || netbsd || openbsd || solaris
 // +build aix darwin dragonfly freebsd js linux netbsd openbsd solaris
 
 package base

src/cmd/go/internal/lockedfile/internal/filelock/filelock_fcntl.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || (solaris && !illumos)
 // +build aix solaris,!illumos
 
 // This code implements the filelock API using POSIX 'fcntl' locks, which attach

src/cmd/go/internal/lockedfile/internal/filelock/filelock_other.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !plan9 && !solaris && !windows
 // +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!plan9,!solaris,!windows
 
 package filelock

src/cmd/go/internal/lockedfile/internal/filelock/filelock_plan9.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build plan9
 // +build plan9
 
 package filelock

src/cmd/go/internal/lockedfile/internal/filelock/filelock_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !js && !plan9
 // +build !js,!plan9
 
 package filelock_test

src/cmd/go/internal/lockedfile/internal/filelock/filelock_unix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin || dragonfly || freebsd || illumos || linux || netbsd || openbsd
 // +build darwin dragonfly freebsd illumos linux netbsd openbsd
 
 package filelock

src/cmd/go/internal/lockedfile/internal/filelock/filelock_windows.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build windows
 // +build windows
 
 package filelock

src/cmd/go/internal/lockedfile/lockedfile_filelock.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9
 // +build !plan9
 
 package lockedfile

src/cmd/go/internal/lockedfile/lockedfile_plan9.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build plan9
 // +build plan9
 
 package lockedfile

src/cmd/go/internal/lockedfile/lockedfile_test.go

@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // js does not support inter-process file locking.
+//go:build !js
 // +build !js
 
 package lockedfile_test

src/cmd/go/internal/lockedfile/transform_test.go

@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // js does not support inter-process file locking.
+//go:build !js
 // +build !js
 
 package lockedfile_test

src/cmd/go/internal/modfetch/bootstrap.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build cmd_go_bootstrap
 // +build cmd_go_bootstrap
 
 package modfetch

src/cmd/go/internal/modfetch/codehost/shell.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ignore
 // +build ignore
 
 // Interactive debugging shell for codehost.Repo implementations.

src/cmd/go/internal/modfetch/sumdb.go

@@ -4,6 +4,7 @@
 
 // Go checksum database lookup
 
+//go:build !cmd_go_bootstrap
 // +build !cmd_go_bootstrap
 
 package modfetch

src/cmd/go/internal/modload/stat_openfile.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (js && wasm) || plan9
 // +build js,wasm plan9
 
 // On plan9, per http://9p.io/magic/man2html/2/access: “Since file permissions

src/cmd/go/internal/modload/stat_unix.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package modload

src/cmd/go/internal/modload/stat_windows.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build windows
 // +build windows
 
 package modload

src/cmd/go/internal/renameio/renameio_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9
 // +build !plan9
 
 package renameio

src/cmd/go/internal/renameio/umask_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9 && !windows && !js
 // +build !plan9,!windows,!js
 
 package renameio

src/cmd/go/internal/robustio/robustio_flaky.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build windows || darwin
 // +build windows darwin
 
 package robustio

src/cmd/go/internal/robustio/robustio_other.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !windows && !darwin
 // +build !windows,!darwin
 
 package robustio

src/cmd/go/internal/test/genflags.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build ignore
 // +build ignore
 
 package main

src/cmd/go/internal/web/bootstrap.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build cmd_go_bootstrap
 // +build cmd_go_bootstrap
 
 // This code is compiled only into the bootstrap 'go' binary.

src/cmd/go/internal/web/http.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !cmd_go_bootstrap
 // +build !cmd_go_bootstrap
 
 // This code is compiled into the real 'go' binary, but it is not

src/cmd/go/internal/web/url_other.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !windows
 // +build !windows
 
 package web

src/cmd/go/internal/web/url_other_test.go

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !windows
 // +build !windows
 
 package web

src/cmd/go/internal/work/testgo.go

@@ -4,6 +4,7 @@
 
 // This file contains extra hooks for testing the go command.
 
+//go:build testgo
 // +build testgo
 
 package work