The Go Playgoroundで 外部パッケージ使いたい

Go(Un)Conference（Goあんこ）LT大会 4kg https://gounconference.connpass.com/event/99487/ の発表資料です。

Transcript

1. ©2018 Wantedly, Inc. The Go PlaygoroundͰ ֎෦ύοέʔδ࢖͍͍ͨ Go(Un)Conference 4kg 19.Oct.2018 - Hazumi Ichijo
2. ©2018 Wantedly, Inc. ࣗݾ঺հ Ұᑍ
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3. ©2018 Wantedly, Inc.  1MBZHSPVOE  JSC
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   DPOTPMF ࢼ͠ʹίʔυΛಈ͔͍ͨ͠ͱ͖
4. ©2018 Wantedly, Inc.  1MBZHSPVOE  JSC
    SBJMT
   DPOTPMF ࢼ͠ʹίʔυΛಈ͔͍ͨ͠ͱ͖ ֎෦ύοέʔδ࢖͑ͳ͍ɾɾɾ
5. ©2018 Wantedly, Inc. package main import ( "fmt" "gopkg.in/guregu/null.v3" ) func main() { fmt.Println(null.StringFrom("PlayGround")) }
6. ©2018 Wantedly, Inc. HP
   HFU
   Λ࣮ߦ͢Δ͚ͩͰ
   ύοέʔδͷґଘղܾͯ͘͠Εͨ͸ͣɾɾɾʁ
7. ©2018 Wantedly, Inc. func compileAndRun(req *request) (*response, error) { // TODO(andybons): Add semaphore to limit number of running programs at once. tmpDir, err := ioutil.TempDir("", "sandbox") if err != nil { return nil, fmt.Errorf("error creating temp directory: %v", err) } defer os.RemoveAll(tmpDir) src := []byte(req.Body) in := filepath.Join(tmpDir, "main.go") if err := ioutil.WriteFile(in, src, 0400); err != nil { return nil, fmt.Errorf("error creating temp file %q: %v", in, err) } https://github.com/golang/playground/blob/master/sandbox.go
8. ©2018 Wantedly, Inc. func compileAndRun(req *request) (*response, error) { // TODO(andybons): Add semaphore to limit number of running programs at once. tmpDir, err := ioutil.TempDir("", "sandbox") if err != nil { return nil, fmt.Errorf("error creating temp directory: %v", err) } defer os.RemoveAll(tmpDir) src := []byte(req.Body) in := filepath.Join(tmpDir, "main.go") if err := ioutil.WriteFile(in, src, 0400); err != nil { return nil, fmt.Errorf("error creating temp file %q: %v", in, err) } https://github.com/golang/playground/blob/master/sandbox.go
9. ©2018 Wantedly, Inc. ݁ہϑΝΠϧʹॻ͖ग़ͯ͠Ϗϧυ͍ͯ͠Δ͚ͩͳͷͰ  ॻ͖ग़͠ઌΛ(01"5)ҎԼʹ͢Δ
    HP
   HFUΛ࣮ߦ͢Δ ͜Ε͚ͩͰ͍͚Δʁʢ͍͚ΔΘ͚͕ͳͦ͞͏ʣ
10. ©2018 Wantedly, Inc. https://github.com/rerost/playground/compare/e07747d8d2cee6639b14ba8021d453a6b8dd9edc...master
11. ©2018 Wantedly, Inc.
12. ©2018 Wantedly, Inc. ಈ͍ͯ͠·ͬͨɾɾɾ
13. ©2018 Wantedly, Inc. https://play-dot-k8s-test-219404.appspot.com/ @hazumirr
14. ©2018 Wantedly, Inc. ͳͥ͜ͷํ๏Ͱ্ख͍͔ͬͨ͘
15. ©2018 Wantedly, Inc. ͳͥ͏·͘ߦͬͨͷ͔  4BOECPY
    ͕ίʔυͷ࣮ߦ࣌ͷΈ༗ޮʹͳ͍ͬͯͨ
     ػೳ͕γϯϓϧͩͬͨ
16. ©2018 Wantedly, Inc. cmd.Env = []string{"GOOS=nacl", "GOARCH=amd64p32", "GOPATH=" + os.Getenv("GOPATH")} if out, err := cmd.CombinedOutput(); err != nil { if _, ok := err.(*exec.ExitError); ok { // Return compile errors to the user. // Rewrite compiler errors to refer to progName // instead of '/tmp/sandbox1234/main.go'. errs := strings.Replace(string(out), in, progName, -1) // "go build", invoked with a file name, puts this odd // message before any compile errors; strip it. errs = strings.Replace(errs, "# command-line-arguments\n", "", 1) return &response{Errors: errs}, nil } return nil, fmt.Errorf("error building go source: %v", err) } ctx, cancel := context.WithTimeout(context.Background(), maxRunTime) defer cancel() cmd = exec.CommandContext(ctx, "sel_ldr_x86_64", "-l", "/dev/null", "-S", "-e", exe, testParam) https://github.com/golang/playground/blob/master/sandbox.go#L320-L339
17. ©2018 Wantedly, Inc. cmd.Env = []string{"GOOS=nacl", "GOARCH=amd64p32", "GOPATH=" + os.Getenv("GOPATH")} if out, err := cmd.CombinedOutput(); err != nil { if _, ok := err.(*exec.ExitError); ok { // Return compile errors to the user. // Rewrite compiler errors to refer to progName // instead of '/tmp/sandbox1234/main.go'. errs := strings.Replace(string(out), in, progName, -1) // "go build", invoked with a file name, puts this odd // message before any compile errors; strip it. errs = strings.Replace(errs, "# command-line-arguments\n", "", 1) return &response{Errors: errs}, nil } return nil, fmt.Errorf("error building go source: %v", err) } ctx, cancel := context.WithTimeout(context.Background(), maxRunTime) defer cancel() cmd = exec.CommandContext(ctx, "sel_ldr_x86_64", "-l", "/dev/null", "-S", "-e", exe, testParam) https://github.com/golang/playground/blob/master/sandbox.go#L320-L339
18. ©2018 Wantedly, Inc. NaClͱ͸  αϯυϘοΫεΛ࣮ݱ͢ΔͨΊͷ΋ͷɹ
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    <ཁग़య> https://ja.wikipedia.org/wiki/Google_Native_Client
19. ©2018 Wantedly, Inc. ͳͥ͏·͍ͬͨ͘ͷ͔ /B$M  ίʔυͷ࣮ߦͷࡍͷΈ༗ޮͩͬͨ
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20. ©2018 Wantedly, Inc. ͳͥ͏·͍ͬͨ͘ͷ͔
21. ©2018 Wantedly, Inc. https://play-dot-k8s-test-219404.appspot.com/ ੬ऑੑ΍ෆ۩߹ͳͲΛݟ͚ͭͨΒڭ͍͑ͯͩ͘͞