1 files changed, 109 insertions, 0 deletions
diff --git a/src/cmd/go/internal/test/genflags.go b/src/cmd/go/internal/test/genflags.go
new file mode 100644
index 0000000..625f941
--- /dev/null
+++ b/src/cmd/go/internal/test/genflags.go
@@ -0,0 +1,109 @@
+// 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.
+
+//go:build ignore
+
+package main
+
+import (
+	"bytes"
+	"flag"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+	"testing"
+	"text/template"
+
+	"cmd/go/internal/test/internal/genflags"
+)
+
+func main() {
+	if err := regenerate(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func regenerate() error {
+	vetAnalyzers, err := genflags.VetAnalyzers()
+	if err != nil {
+		return err
+	}
+
+	t := template.Must(template.New("fileTemplate").Parse(fileTemplate))
+	tData := map[string][]string{
+		"testFlags":    testFlags(),
+		"vetAnalyzers": vetAnalyzers,
+	}
+	buf := bytes.NewBuffer(nil)
+	if err := t.Execute(buf, tData); err != nil {
+		return err
+	}
+
+	f, err := os.Create("flagdefs.go")
+	if err != nil {
+		return err
+	}
+
+	cmd := exec.Command("gofmt")
+	cmd.Stdin = buf
+	cmd.Stdout = f
+	cmd.Stderr = os.Stderr
+	cmdErr := cmd.Run()
+
+	if err := f.Close(); err != nil {
+		return err
+	}
+	if cmdErr != nil {
+		os.Remove(f.Name())
+		return cmdErr
+	}
+
+	return nil
+}
+
+func testFlags() []string {
+	testing.Init()
+
+	var names []string
+	flag.VisitAll(func(f *flag.Flag) {
+		var name string
+		var found bool
+		if name, found = strings.CutPrefix(f.Name, "test."); !found {
+			return
+		}
+
+		switch name {
+		case "testlogfile", "paniconexit0", "fuzzcachedir", "fuzzworker", "gocoverdir":
+			// These flags are only for use by cmd/go.
+		default:
+			names = append(names, name)
+		}
+	})
+
+	return names
+}
+
+const fileTemplate = `// 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.
+
+// Code generated by genflags.go — DO NOT EDIT.
+
+package test
+
+// passFlagToTest contains the flags that should be forwarded to
+// the test binary with the prefix "test.".
+var passFlagToTest = map[string]bool {
+{{- range .testFlags}}
+	"{{.}}": true,
+{{- end }}
+}
+
+var passAnalyzersToVet = map[string]bool {
+{{- range .vetAnalyzers}}
+	"{{.}}": true,
+{{- end }}
+}
+`