# with vendored files.
# See issue #46400
[short] skip 'builds and links a binary twice'
go mod tidy
go mod vendor

go build -mod=vendor
go version -m example$GOEXE
cp stdout version-m.txt

env GOMODCACHE=$WORK${/}modcache
go build -mod=vendor
go version -m example$GOEXE
cmp stdout version-m.txt

-- go.mod --
module example
go 1.22
require rsc.io/sampler v1.3.0

-- main.go --
package main

import (

env GOFLAGS='-m -v'
go version
stdout '^go version'
env GOFLAGS=

env GO111MODULE=on

# Check that very basic version lookup succeeds.
go build empty.go
go version empty$GOEXE
[cgo] go build -ldflags=-linkmode=external empty.go
[cgo] go version empty$GOEXE

# Skip the remaining builds if we are running in short mode.
[short] skip

# Check that 'go version' and 'go version -m' work on a binary built in module mode.

		fmt.Fprintf(fgo2, "//go:linkname _cgoexp%s_%s _cgoexp%s_%s\n", cPrefix, exp.ExpName, cPrefix, exp.ExpName)
		// In external linking mode, the Go linker sees the Go
		// wrapper, but not the C wrapper. For this case,
		// export the Go wrapper so the host linker can
		// resolve the reference from the C wrapper to the Go
		// wrapper.
		fmt.Fprintf(fgo2, "//go:cgo_export_static _cgoexp%s_%s\n", cPrefix, exp.ExpName)

env GOCACHE=$WORK/gocache
exec ./fuzz.test$GOEXE -test.fuzzcachedir=$GOCACHE/fuzz -test.fuzz=FuzzMinCache -test.fuzztime=1000x
go run check_cache/check_cache.go $GOCACHE/fuzz/FuzzMinCache

# Test that minimization occurs for a crash that appears while minimizing a
# newly found interesting input. There must be only one worker for this test to
# be flaky like we want.

# as a control case (to ensure that our regexps do catch rebuilds).

[!short] env GOCACHE=$WORK/cache
[!short] env CGO_CFLAGS=-DTestScript_cgo_stale_precompiled=true
go build -x runtime/cgo
[!short] stderr '[/\\]cgo'$GOEXE'["]? .* -importpath runtime/cgo'

# https://go.dev/issue/47215: a missing $(go env CC) caused the precompiled net
# to be stale. But as of https://go.dev/cl/452457 the precompiled libraries are

	CGO_LDFLAGS
	CGO_LDFLAGS_ALLOW
	CGO_LDFLAGS_DISALLOW
	CXX
	FC
	GCCGO
	GO111MODULE
	GO386
	GOAMD64
	GOARCH
	GOARM
	GOARM64
	GOBIN
	GOCACHE
	GOCACHEPROG
	GOENV
	GOEXE
	GOEXPERIMENT
	GOFLAGS
	GOGCCFLAGS
	GOHOSTARCH
	GOHOSTOS
	GOINSECURE
	GOMIPS
	GOMIPS64
	GOMODCACHE
	GONOPROXY
	GONOSUMDB
	GOOS
	GOPATH
	GOPPC64
	GOPRIVATE
	GOPROXY
	GORISCV64

env GOPATH=$root/other
go env -u GOPATH
! stderr .+
go env -u GOPATH
! stderr .+

# go env -w rejects unknown or bad variables
! go env -w GOGC=off
stderr 'unknown go command variable GOGC'
! go env -w GOEXE=.bat
stderr 'GOEXE cannot be modified'
! go env -w GOVERSION=customversion
stderr 'GOVERSION cannot be modified'
! go env -w GOENV=/env
stderr 'GOENV can only be set using the OS environment'
! go env -w GODEBUG=gctrace=1

  main\.main\(\)
      .*/main\.go:34 \+0x[0-9,a-f]+

Previous write at 0x[0-9,a-f]+ by goroutine [0-9]:
  main\.goCallback\(\)
      .*/main\.go:27 \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      .*_cgo_gotypes\.go:[0-9]+ \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      <autogenerated>:1 \+0x[0-9,a-f]+

Goroutine [0-9] \(running\) created at:
  runtime\.newextram\(\)

[short] skip

env TESTGO_VERSION=go1.21pre3

# Compile a fake toolchain to put in the path under various names.
env GOTOOLCHAIN=
mkdir $WORK/bin
go build -o $WORK/bin/go1.50.0$GOEXE ./fakego.go  # adds .exe extension implicitly on Windows

[!GOOS:plan9] env PATH=$WORK/bin
[GOOS:plan9] env path=$WORK/bin

go version
stdout go1.21pre3

# GOTOOLCHAIN=go1.50.0
env GOTOOLCHAIN=go1.50.0

go run ./which clang
cp stdout $WORK/.realclang

# Build a fake clang and ensure that it is the one in $PATH.
mkdir $WORK/bin
go build -o $WORK/bin/clang$GOEXE ./fakeclang
[!GOOS:plan9] env PATH=$WORK${/}bin
[GOOS:plan9] env path=$WORK${/}bin

# Force CGO_ENABLED=1 so that the following commands should error
# out if the fake clang doesn't work.
env CGO_ENABLED=1