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// 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.
/*
Program parse_benchcmp runs testcase_parse_benchmark and displays
performance changes.
*/
package main
import (
"fmt"
"os"
"os/exec"
"strings"
)
func run(prog string, args ...string) {
cmd := exec.Command(prog, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
panic(err)
}
}
func output(prog string, args ...string) string {
cmd := exec.Command(prog, args...)
out, err := cmd.CombinedOutput()
if err != nil {
panic(err)
}
return strings.TrimSpace(string(out))
}
func runBenchtest(fname string) {
run("go", "generate")
f, err := os.Create(fname)
if err != nil {
panic(err)
}
defer func() {
err = f.Close()
if err != nil {
panic(err)
}
}()
cmd := exec.Command("go", "test", "-run", "NONE", "-bench", ".")
cmd.Stdout = f
err = cmd.Run()
if err != nil {
panic(err)
}
}
func main() {
_, err := exec.LookPath("benchcmp")
if err != nil {
fmt.Fprintln(os.Stderr, "benchcmp not found:", err)
fmt.Fprintln(os.Stderr, "install it by:")
fmt.Fprintln(os.Stderr, " export GOPATH=$HOME # if not set")
fmt.Fprintln(os.Stderr, " PATH=$PATH:$GOPATH/bin")
fmt.Fprintln(os.Stderr, " go get -u golang.org/x/tools/cmd/benchcmp")
os.Exit(1)
}
status := output("git", "status", "-s")
if status != "" {
fmt.Fprintln(os.Stderr, "workspace is dirty. please commit.")
fmt.Fprintln(os.Stderr, status)
os.Exit(1)
}
curBranch := output("git", "symbolic-ref", "--short", "HEAD")
if curBranch == "master" {
fmt.Fprintln(os.Stderr, "current branch is master.")
fmt.Fprintln(os.Stderr, "run in branch to compare with master.")
os.Exit(1)
}
fmt.Println("Run benchmark on master and ", curBranch)
fmt.Println("git checkout master")
run("git", "checkout", "master")
run("git", "clean", "-f")
commit := output("git", "log", "--oneline", "-1")
fmt.Println(commit)
fmt.Println("running benchmark tests...")
runBenchtest("bench-old.out")
fmt.Println("git checkout", curBranch)
run("git", "checkout", curBranch)
run("git", "clean", "-f")
commit = output("git", "log", "--oneline", "-1")
fmt.Println(commit)
fmt.Println("running benchmark tests...")
runBenchtest("bench-new.out")
run("benchcmp", "bench-old.out", "bench-new.out")
}
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