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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package reboot_test verifies that the current GOROOT can be used to bootstrap
// itself.
package reboot_test
import (
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
"time"
)
func TestRepeatBootstrap(t *testing.T) {
if testing.Short() {
t.Skipf("skipping test that rebuilds the entire toolchain")
}
realGoroot, err := filepath.Abs(filepath.Join("..", ".."))
if err != nil {
t.Fatal(err)
}
// To ensure that bootstrapping doesn't unexpectedly depend
// on the Go repo's git metadata, add a fake (unreadable) git
// directory above the simulated GOROOT.
// This mimics the configuration one much have when
// building from distro-packaged source code
// (see https://go.dev/issue/54852).
parent := t.TempDir()
dotGit := filepath.Join(parent, ".git")
if err := os.Mkdir(dotGit, 000); err != nil {
t.Fatal(err)
}
goroot := filepath.Join(parent, "goroot")
gorootSrc := filepath.Join(goroot, "src")
overlayStart := time.Now()
if err := overlayDir(gorootSrc, filepath.Join(realGoroot, "src")); err != nil {
t.Fatal(err)
}
t.Logf("GOROOT/src overlay set up in %s", time.Since(overlayStart))
if err := os.WriteFile(filepath.Join(goroot, "VERSION"), []byte(runtime.Version()), 0666); err != nil {
t.Fatal(err)
}
var makeScript string
switch runtime.GOOS {
case "windows":
makeScript = "make.bat"
case "plan9":
makeScript = "make.rc"
default:
makeScript = "make.bash"
}
cmd := exec.Command(filepath.Join(goroot, "src", makeScript))
cmd.Dir = gorootSrc
cmd.Env = append(cmd.Environ(), "GOROOT=", "GOROOT_BOOTSTRAP="+realGoroot)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
if err := cmd.Run(); err != nil {
t.Fatal(err)
}
}
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