Go At Work

You know how to program Go. How do you program Go at work?

Transcript

1. digitalocean.com Go At Work
2. digitalocean.com Go At DigitalOcean
3. digitalocean.com Bryan Liles @bryanl @digitalocean
4. digitalocean.com Wow GO!
5. digitalocean.com
6. digitalocean.com Dependencies :|
7. digitalocean.com package main import "github.com/go-martini/martini" func main() { m := martini.Classic() m.Get("/", func() string { return "Hello world!" }) m.Run() }
8. digitalocean.com package main import ( "fmt" "net/http" "github.com/codegangsta/negroni" ) func main() { mux := http.NewServeMux() mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) { fmt.Fprintf(w, "Hello world!") }) n := negroni.Classic() n.UseHandler(mux) n.Run(":3000") }
9. digitalocean.com package main import ( "fmt" "net/http" ) func handler(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello world!") } func main() { http.HandleFunc("/", handler) http.ListenAndServe(":3000", nil) }
10. digitalocean.com package main import ( "fmt" "net/http" "github.com/gorilla/mux" ) func main() { r := mux.NewRouter() r.HandleFunc("/", homeHandler) http.Handle("/", r) http.ListenAndServe(":3000", nil) } func homeHandler(w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, "Hello world!") }
11. digitalocean.com “You wouldn’t go around picking stuff off the street and eating it. Why do so with your dependencies?”
12. digitalocean.com Fancy Stuff Standard Lib
13. digitalocean.com Standard Lib Fancy Stuff
14. digitalocean.com Standard Lib Fancy Stuff
15. digitalocean.com Fancy Stuff Standard Lib
16. digitalocean.com Managing the GOPATH
17. digitalocean.com There’s more than one way to do it.
18. digitalocean.com single GOPATH
19. digitalocean.com GOPATH for each project
20. digitalocean.com Dependency manager
21. digitalocean.com Go @digitalocean
22. digitalocean.com single GOPATH
23. digitalocean.com a DOGE
24. digitalocean.com vendor repos import "bits.do.co/vendor/cli"
25. digitalocean.com Beyond gofmt
26. digitalocean.com Sometimes the default sorting of your imports just doesn’t satisfy…
27. digitalocean.com import ( "database/sql" "doge/log" "doge/notify" "fmt" "os" "services/migration" "time" _ "github.com/go-sql-driver/mysql" "github.com/ianschenck/envflag" )
28. digitalocean.com import ( "database/sql" "fmt" "os" "time" "doge/log" "doge/notify" "services/migration" _ "github.com/go-sql-driver/mysql" "github.com/ianschenck/envflag" )
29. digitalocean.com http://golang.org/pkg/go/parser/ (and friends)
30. digitalocean.com Test the GO
31. digitalocean.com You are writing tests, right?
32. digitalocean.com func TestSquare(t *testing.T) { expected := 25 got := square(5) if got != expected { t.Errorf("expected %d, got %d", expected, got) } }
33. digitalocean.com undefined: square
34. digitalocean.com func square(x int) int { return 0 }
35. digitalocean.com --- FAIL: TestSquare (0.00 seconds) square_test.go:14: expected 25, got 0 FAIL
36. digitalocean.com func square(x int) int { return 25 }
37. digitalocean.com $ go test . ok _/Users/bryan/gothamgo2014 0.005s
38. digitalocean.com func TestSquare0(t *testing.T) { expected := 0 got := square(0) if got != expected { t.Errorf("expected %d, got %d", expected, got) } }
39. digitalocean.com --- FAIL: TestSquare0 (0.00 seconds) square_test.go:23: expected 0, got 25 FAIL
40. digitalocean.com func square(x int) int { return x * x }
41. digitalocean.com go test . ok _/Users/bryan/gothamgo2014 0.006s
42. digitalocean.com func TestSquare(t *testing.T) { cases := []struct { arg int expected int }{ {5, 25}, {0, 0}, {-1, 1}, } for i, c := range cases { got := square(c.arg) if got != c.expected { t.Errorf("case %d: expected %d, got %d", i, c.expected, got) } } }
43. digitalocean.com looper https://github.com/nathany/looper
44. digitalocean.com
45. digitalocean.com GoConvey http://goconvey.co/
46. digitalocean.com
47. digitalocean.com • 10 things you (probably) don't know about Go • Testing Techniques
48. digitalocean.com Code Reviews
49. digitalocean.com https://code.google.com/p/go-wiki/wiki/CodeReviewComments Start here
50. digitalocean.com WHY > HOW
51. digitalocean.com Continuous Integration
52. digitalocean.com Drone CI
53. digitalocean.com We ❤️ Artifacts
54. digitalocean.com Deploying GO
55. digitalocean.com Little Deploys = ansible
56. digitalocean.com Big Deploys = Chef
57. digitalocean.com
58. digitalocean.com The End.