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cmd/go: omit VCS stamping during bootstrap

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cmd/dist can't easily hard-code -buildvcs=false because not all
versions of cmd/go supported for bootstrapping recognize that flag.

However, we don't want to stamp the bootstrap binaries: the stamping
is redundant with the VERSION file writted during bootstrapping (which
is why it is normally omitted for standard-library packages and
commands), and it may also interfere with building the Go repo from a
source tarball or zip file.

Fixes #54852.

Change-Id: If223f094af137c4c202d6bf622619bd2da397ec4
Reviewed-on: https://go-review.googlesource.com/c/go/+/432435
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Bryan C. Mills 2022-09-09 17:29:12 -04:00 committed by Gopher Robot
parent 88a6a4d1ba
commit 42a46206b9
2 changed files with 26 additions and 4 deletions
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24
misc/reboot/reboot_test.go
View file

@ -20,11 +20,27 @@ func TestRepeatBootstrap(t *testing.T) {
t.Skipf("skipping test that rebuilds the entire toolchain")
}
goroot := t.TempDir()
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(runtime.GOROOT(), "src")); err != nil {
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))
@ -43,9 +59,9 @@ func TestRepeatBootstrap(t *testing.T) {
makeScript = "make.bash"
}
cmd := exec.Command(filepath.Join(runtime.GOROOT(), "src", makeScript))
cmd := exec.Command(filepath.Join(goroot, "src", makeScript))
cmd.Dir = gorootSrc
cmd.Env = append(os.Environ(), "GOROOT=", "GOROOT_BOOTSTRAP="+runtime.GOROOT())
cmd.Env = append(cmd.Environ(), "GOROOT=", "GOROOT_BOOTSTRAP="+realGoroot)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
if err := cmd.Run(); err != nil {

6
src/cmd/go/internal/load/pkg.go
View file

@ -2441,6 +2441,12 @@ func (p *Package) setBuildInfo(autoVCS bool) {
}
if wantVCS && p.Module != nil && p.Module.Version == "" && !p.Standard {
if p.Module.Path == "bootstrap" && cfg.GOROOT == os.Getenv("GOROOT_BOOTSTRAP") {
// During bootstrapping, the bootstrap toolchain is built in module
// "bootstrap" (instead of "std"), with GOROOT set to GOROOT_BOOTSTRAP
// (so the bootstrap toolchain packages don't even appear to be in GOROOT).
goto omitVCS
}
repoDir, vcsCmd, err = vcs.FromDir(base.Cwd(), "", allowNesting)
if err != nil && !errors.Is(err, os.ErrNotExist) {
setVCSError(err)