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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 bootstrap_test verifies that the current GOROOT can be used to bootstrap
// itself.
package bootstrap_test
import (
"fmt"
"internal/testenv"
"io"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
"time"
)
func TestRepeatBootstrap(t *testing.T) {
if testing.Short() {
t.Skip("skipping test that rebuilds the entire toolchain")
}
switch runtime.GOOS {
case "android", "ios", "js", "wasip1":
t.Skipf("skipping because the toolchain does not have to bootstrap on GOOS=%s", runtime.GOOS)
}
realGoroot := testenv.GOROOT(t)
// 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)
}
overlayStart := time.Now()
goroot := filepath.Join(parent, "goroot")
gorootSrc := filepath.Join(goroot, "src")
if err := overlayDir(gorootSrc, filepath.Join(realGoroot, "src")); err != nil {
t.Fatal(err)
}
gorootLib := filepath.Join(goroot, "lib")
if err := overlayDir(gorootLib, filepath.Join(realGoroot, "lib")); err != nil {
t.Fatal(err)
}
t.Logf("GOROOT 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"
}
var stdout strings.Builder
cmd := exec.Command(filepath.Join(goroot, "src", makeScript))
cmd.Dir = gorootSrc
cmd.Env = append(cmd.Environ(), "GOROOT=", "GOROOT_FINAL=", "GOROOT_BOOTSTRAP="+realGoroot)
cmd.Stderr = os.Stderr
cmd.Stdout = io.MultiWriter(os.Stdout, &stdout)
if err := cmd.Run(); err != nil {
t.Fatal(err)
}
// Test that go.dev/issue/42563 hasn't regressed.
t.Run("PATH reminder", func(t *testing.T) {
var want string
switch gorootBin := filepath.Join(goroot, "bin"); runtime.GOOS {
default:
want = fmt.Sprintf("*** You need to add %s to your PATH.", gorootBin)
case "plan9":
want = fmt.Sprintf("*** You need to bind %s before /bin.", gorootBin)
}
if got := stdout.String(); !strings.Contains(got, want) {
t.Errorf("reminder %q is missing from %s stdout:\n%s", want, makeScript, got)
}
})
}
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