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cmd/vet/all: build the vet tool within the golang.org/x/tools repository

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When running cmd/vet/all on multiple builders, the coordinator places
a copy of golang.org/x/tools at a consistent revision in the builders'
GOPATHs. Keep using the consistent revision in module mode by
executing the build from a working directory within that repository.

When not running on a builder, use 'go vet' directly instead of
building an arbitrarily stale vet tool from the user's GOPATH.

Updates #30228

Change-Id: I19bc809247378da98f3e6ac8572f61bda4518143
Reviewed-on: https://go-review.googlesource.com/c/go/+/165740
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Bryan C. Mills 2019-03-06 11:06:14 -05:00
parent 4a9064ef41
commit a30421a394
1 changed files with 65 additions and 25 deletions
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90
src/cmd/vet/all/main.go
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@ -42,7 +42,7 @@ var failed uint32 // updated atomically
func main() {
log.SetPrefix("vet/all: ")
log.SetFlags(0)
log.SetFlags(log.Lshortfile)
testenv.SetModVendor()
var err error
@ -78,9 +78,10 @@ var hostPlatform = platform{os: build.Default.GOOS, arch: build.Default.GOARCH}
func allPlatforms() []platform {
var pp []platform
cmd := exec.Command(cmdGoPath, "tool", "dist", "list")
cmd.Stderr = new(strings.Builder)
out, err := cmd.Output()
if err != nil {
log.Fatal(err)
log.Fatalf("%s: %v\n%s", strings.Join(cmd.Args, " "), err, cmd.Stderr)
}
lines := bytes.Split(out, []byte{'\n'})
for _, line := range lines {
@ -222,22 +223,61 @@ func (p platform) vet() {
w := make(whitelist)
w.load(p.os, p.arch)
tmpdir, err := ioutil.TempDir("", "cmd-vet-all")
if err != nil {
log.Fatal(err)
}
defer os.RemoveAll(tmpdir)
var vetCmd []string
// Build the go/packages-based vet command from the x/tools
// repo. It is considerably faster than "go vet", which rebuilds
// the standard library.
vetTool := filepath.Join(tmpdir, "vet")
cmd := exec.Command(cmdGoPath, "build", "-o", vetTool, "golang.org/x/tools/go/analysis/cmd/vet")
cmd.Dir = filepath.Join(runtime.GOROOT(), "src")
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stderr
if err := cmd.Run(); err != nil {
log.Fatal(err)
if os.Getenv("GO_BUILDER_NAME") == "" {
vetCmd = []string{cmdGoPath, "vet"}
} else {
// Build the go/packages-based vet command from the x/tools
// repo. It is considerably faster than "go vet", which rebuilds
// the standard library.
tmpdir, err := ioutil.TempDir("", "cmd-vet-all")
if err != nil {
log.Fatal(err)
}
defer os.RemoveAll(tmpdir)
vetTool := filepath.Join(tmpdir, "vet")
vetCmd = []string{
vetTool,
"-nilness=0", // expensive, uses SSA
}
cmd := exec.Command(cmdGoPath, "build", "-o", vetTool, "golang.org/x/tools/go/analysis/cmd/vet")
cmd.Env = os.Environ()
// golang.org/x/tools does not have a vendor directory, so don't try to use
// one in module mode.
for i, v := range cmd.Env {
if strings.HasPrefix(v, "GOFLAGS=") {
var goflags []string
for _, f := range strings.Fields(strings.TrimPrefix(v, "GOFLAGS=")) {
if f != "-mod=vendor" && f != "--mod=vendor" {
goflags = append(goflags, f)
}
}
cmd.Env[i] = strings.Join(goflags, " ")
}
}
// The coordinator places a copy of golang.org/x/tools in GOPATH.
// If we can find it there, use that specific version.
for _, gp := range filepath.SplitList(os.Getenv("GOPATH")) {
gopathDir := filepath.Join(gp, "src", "golang.org", "x", "tools", "go", "analysis", "cmd", "vet")
if _, err := os.Stat(gopathDir); err == nil {
cmd.Dir = gopathDir
}
}
if cmd.Dir == "" {
// Otherwise, move to tmpdir and let the module loader resolve the latest version.
cmd.Dir = tmpdir
}
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stderr
if err := cmd.Run(); err != nil {
log.Fatalf("%s: %v", strings.Join(cmd.Args, " "), err)
}
}
// TODO: The unsafeptr checks are disabled for now,
@ -245,13 +285,13 @@ func (p platform) vet() {
// and no clear way to improve vet to eliminate large chunks of them.
// And having them in the whitelists will just cause annoyance
// and churn when working on the runtime.
cmd = exec.Command(vetTool,
"-unsafeptr=0",
"-nilness=0", // expensive, uses SSA
"std",
"cmd/...",
"cmd/compile/internal/gc/testdata",
)
cmd := exec.Command(vetCmd[0],
append(vetCmd[1:],
"-unsafeptr=0",
"std",
"cmd/...",
"cmd/compile/internal/gc/testdata",
)...)
cmd.Dir = filepath.Join(runtime.GOROOT(), "src")
cmd.Env = append(os.Environ(), "GOOS="+p.os, "GOARCH="+p.arch, "CGO_ENABLED=0")
stderr, err := cmd.StderrPipe()
@ -321,7 +361,7 @@ NextLine:
if file == "" {
if !parseFailed {
parseFailed = true
fmt.Fprintf(os.Stderr, "failed to parse %s vet output:\n", p)
fmt.Fprintf(os.Stderr, "failed to parse %s output:\n# %s\n", p, strings.Join(cmd.Args, " "))
}
fmt.Fprintln(os.Stderr, line)
continue