Drover's back, baby!

go/src/infra/tools/drover/util.go

Index: go/src/infra/tools/drover/util.go
diff --git a/go/src/infra/tools/drover/util.go b/go/src/infra/tools/drover/util.go
new file mode 100644
index 0000000000000000000000000000000000000000..ca57b99ba96aa5d98bbb0deeb4ba102b6249ab9b
--- /dev/null
+++ b/go/src/infra/tools/drover/util.go
@@ -0,0 +1,40 @@
+// Copyright 2014 The Chromium 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 main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func failIf(err error) {
+	if err != nil {
+		fmt.Println("fatal:", err)
+		os.Exit(1)
+	}
+}
+
+func SplitLines(data string) []string {
+	return strings.Split(strings.TrimRight(data, "\n"), "\n")
+}
+
+func Shell(dir string) bool {
+	shell := os.Getenv("SHELL")
+	if shell == "" {
+		shell = DefaultShell
+	}
+	shell, err := exec.LookPath(shell)
+	failIf(err)
+	p, err := os.StartProcess(shell, []string{shell}, &os.ProcAttr{
+		Dir:   dir,
+		Files: []*os.File{os.Stdin, os.Stdout, os.Stderr},
+	})
+	failIf(err)
+	s, err := p.Wait()
+	failIf(err)
+
+	return s.Success()
+}