//go:build !js && !wasip1

package toolchain

import (
	"cmd/go/internal/base"
	"internal/godebug"
	"os"
	"os/exec"
	"runtime"
	"syscall"
)

// execGoToolchain execs the Go toolchain with the given name (gotoolchain),
// GOROOT directory, and go command executable.
// The GOROOT directory is empty if we are invoking a command named
// gotoolchain found in $PATH.

grep '^go 1.50$' go.work
! grep toolchain go.work

# work init with newer modules should bump go,
# including updating to a newer toolchain as needed.
# Because work init writes the current toolchain as the go version,
# it writes the bumped go version, not the max of the used modules.
env TESTGO_VERSION=go1.21
env TESTGO_VERSION_SWITCH=switch
rm go.work
env GOTOOLCHAIN=local
! go work init ./m1_22_0

cmp go.mod go.mod.tidy

cp go.mod.orig go.mod
env GOTOOLCHAIN=local
! go get -v .
stderr '^go: example.net/b@v0.1.0: module ./b1 requires go >= 1.22.0 \(running go 1.21.0; GOTOOLCHAIN=local\)$'
env GOTOOLCHAIN=auto
go get -v .
cmp stderr get-v-stderr.want
cmp go.mod go.mod.tidy

cp go.mod.orig go.mod
env GOTOOLCHAIN=local
! go get -u -v .

stderr '^go: cannot load module m1_22_1 listed in go.work file: m1_22_1'${/}'go.mod requires go >= 1.22.1 \(running go 1.21; GOTOOLCHAIN=local\)$'
env GOTOOLCHAIN=auto
go work sync
stderr '^go: m1_22_1'${/}'go.mod requires go >= 1.22.1; switching to go1.22.9$'
grep '^go 1.22.1$' go.work
grep '^toolchain go1.22.9$' go.work

# work sync with newer modules should update go 1.22.1 -> 1.24rc1 and drop toolchain

	}
	return "go" + latest, nil
}

// HasAuto reports whether the GOTOOLCHAIN setting allows "auto" upgrades.
func HasAuto() bool {
	env := cfg.Getenv("GOTOOLCHAIN")
	return env == "auto" || strings.HasSuffix(env, "+auto")
}

// HasPath reports whether the GOTOOLCHAIN setting allows "path" upgrades.
func HasPath() bool {
	env := cfg.Getenv("GOTOOLCHAIN")
	return env == "path" || strings.HasSuffix(env, "+path")

env TESTGO_VERSION=go1.21
env GOTOOLCHAIN=local
! go mod download rsc.io/future@v1.0.0
stderr '^go: rsc.io/future@v1.0.0 requires go >= 1.999 \(running go 1.21; GOTOOLCHAIN=local\)$'

-- go.mod --
module m
go 1.21

-- x.go --
package p

env TESTGO_VERSION_SWITCH=switch

go get toolchain@go1.22.1
stderr '^go: added toolchain go1.22.1$'
! stderr '(added|removed|upgraded|downgraded) go'
grep 'toolchain go1.22.1' go.mod

go get toolchain@none
stderr '^go: removed toolchain go1.22.1$'
! stderr '(added|removed|upgraded|downgraded) go'
! grep toolchain go.mod

go get toolchain@go1.22.1
stderr '^go: added toolchain go1.22.1$'

# Test support for go work edit -toolchain to set toolchain to use

env GOTOOLCHAIN=local
env GO111MODULE=on

! grep toolchain go.work
go work edit -toolchain=go1.9
grep 'toolchain go1.9' go.work

go work edit -toolchain=default
grep 'toolchain default' go.work

go work edit -toolchain=none
! grep toolchain go.work

-- go.work --
go 1.8
use .
-- go.mod --

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

//go:build js || wasip1

package toolchain

import "cmd/go/internal/base"

func execGoToolchain(gotoolchain, dir, exe string) {
	base.Fatalf("execGoToolchain unsupported")

# See https://proxy.golang.org for details.
GOPROXY=https://proxy.golang.org,direct
GOSUMDB=sum.golang.org

# Automatically download newer toolchains as directed by go.mod files.
# See https://go.dev/doc/toolchain for details.