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Merge pull request #14928 from fjl/build-goroot-explain

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internal/build: add GoTool and document why it uses GOROOT
This commit is contained in:
Péter Szilágyi 2017-08-07 17:47:58 +03:00 committed by GitHub
commit f5925b0459
2 changed files with 15 additions and 6 deletions
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5
build/ci.go
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@ -250,10 +250,7 @@ func goTool(subcmd string, args ...string) *exec.Cmd {
}
func goToolArch(arch string, subcmd string, args ...string) *exec.Cmd {
gocmd := filepath.Join(runtime.GOROOT(), "bin", "go")
cmd := exec.Command(gocmd, subcmd)
cmd.Args = append(cmd.Args, args...)
cmd := build.GoTool(subcmd, args...)
if subcmd == "build" || subcmd == "install" || subcmd == "test" {
// Go CGO has a Windows linker error prior to 1.8 (https://github.com/golang/go/issues/8756).
// Work around issue by allowing multiple definitions for <1.8 builds.

16
internal/build/util.go
View File

@ -138,6 +138,19 @@ func CopyFile(dst, src string, mode os.FileMode) {
}
}
// GoTool returns the command that runs a go tool. This uses go from GOROOT instead of PATH
// so that go commands executed by build use the same version of Go as the 'host' that runs
// build code. e.g.
//
// /usr/lib/go-1.8/bin/go run build/ci.go ...
//
// runs using go 1.8 and invokes go 1.8 tools from the same GOROOT. This is also important
// because runtime.Version checks on the host should match the tools that are run.
func GoTool(tool string, args ...string) *exec.Cmd {
args = append([]string{tool}, args...)
return exec.Command(filepath.Join(runtime.GOROOT(), "bin", "go"), args...)
}
// ExpandPackagesNoVendor expands a cmd/go import path pattern, skipping
// vendored packages.
func ExpandPackagesNoVendor(patterns []string) []string {
@ -148,8 +161,7 @@ func ExpandPackagesNoVendor(patterns []string) []string {
}
}
if expand {
args := append([]string{"list"}, patterns...)
cmd := exec.Command(filepath.Join(runtime.GOROOT(), "bin", "go"), args...)
cmd := GoTool("list", patterns...)
out, err := cmd.CombinedOutput()
if err != nil {
log.Fatalf("package listing failed: %v\n%s", err, string(out))