mirror of
https://github.com/golang/go
synced 2024-11-07 04:16:10 -07:00
ef06a5f44a
go:embed disallows using symlinked files by design. crypto/elliptic is the first std package to use it as of CL 380475, and unfortunately that broke the TestRepeatBootstrap long test. The reason it uses symlinks is for speed; it wants to copy GOROOT/src, but regular files aren't going to be modified in any way, so a symlink, if supported, means not needing to copy the contents. Replace the symlink attempt with hard links, which will mean regular files remain as such, fixing go:embed. It's worth noting that on many systems hard links won't work, as the temporary filesystem tends to be separate, but it doesn't hurt to try. In my system, where /tmp is tmpfs, the test now copies more bytes. With the added Logf, I can see overlayDir goes from ~30ms to ~100ms. This makes sense, as GOROOT/src currently weighs around 100MiB. To alleviate that slow-down, stop copying testdata directories, as they currently weigh around 20MiB and aren't needed for the test. This gets overlayDir on my system down to an acceptable ~70ms. I briefly considered teaching overlayDir what files can be symlinks, but that seemed fairly complex long-term, as any file could be embedded. While here, start using testing.T.TempDir and fs.WalkDir. For #50995. Change-Id: I17947e6bdee96237e1ca0606ad0b95e7c5987bc1 Reviewed-on: https://go-review.googlesource.com/c/go/+/383995 Trust: Daniel Martí <mvdan@mvdan.cc> Trust: Bryan Mills <bcmills@google.com> Run-TryBot: Bryan Mills <bcmills@google.com> Reviewed-by: Bryan Mills <bcmills@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
// 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")
|
|
}
|
|
|
|
goroot := t.TempDir()
|
|
|
|
gorootSrc := filepath.Join(goroot, "src")
|
|
overlayStart := time.Now()
|
|
if err := overlayDir(gorootSrc, filepath.Join(runtime.GOROOT(), "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(runtime.GOROOT(), "src", makeScript))
|
|
cmd.Dir = gorootSrc
|
|
cmd.Env = append(os.Environ(), "GOROOT=", "GOROOT_BOOTSTRAP="+runtime.GOROOT())
|
|
cmd.Stderr = os.Stderr
|
|
cmd.Stdout = os.Stdout
|
|
if err := cmd.Run(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|