upload android base code part3

android/build/kati/make-c/main.go

@@ -0,0 +1,58 @@
+// Copyright 2015 Google Inc. All rights reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// make-c is simple program to measure time to parse Makefiles in android.
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"os/exec"
+	"time"
+)
+
+func main() {
+	parseDone := make(chan bool)
+	cmd := exec.Command("make", "-n")
+	r, err := cmd.StdoutPipe()
+	if err != nil {
+		panic(err)
+	}
+	t := time.Now()
+	go func() {
+		s := bufio.NewScanner(r)
+		for s.Scan() {
+			if bytes.HasPrefix(s.Bytes(), []byte("echo ")) {
+				parseDone <- true
+				return
+			}
+			fmt.Println(s.Text())
+		}
+		if err := s.Err(); err != nil {
+			panic(err)
+		}
+		panic("unexpected end of make?")
+	}()
+	err = cmd.Start()
+	if err != nil {
+		panic(err)
+	}
+	select {
+	case <-parseDone:
+		fmt.Printf("make -c: %v\n", time.Since(t))
+	}
+	cmd.Process.Kill()
+	cmd.Wait()
+}