【Go】Go言語Web開発プロジェクト Part2.5 - 箸休めにdepによるパッケージ管理改善とgolintなどで良いGoのコードを書いていく -

% goenv exec go get -u github.com/golang/dep/cmd/dep 

# Gopkg.toml example
#
# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
# for detailed Gopkg.toml documentation.
#
# required = ["github.com/user/thing/cmd/thing"]
# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
#
# [[constraint]]
#   name = "github.com/user/project"
#   version = "1.0.0"
#
# [[constraint]]
#   name = "github.com/user/project2"
#   branch = "dev"
#   source = "github.com/myfork/project2"
#
# [[override]]
#   name = "github.com/x/y"
#   version = "2.4.0"
#
# [prune]
#   non-go = false
#   go-tests = true
#   unused-packages = true

required = ["github.com/pressly/goose/cmd/goose"]

[[constraint]]
  name = "github.com/lib/pq"
  version = "1.0.0"

[[constraint]]
  name = "github.com/yosssi/ace"
  version = "0.0.5"

[prune]
  go-tests = true
  unused-packages = true

% dep ensure

実行ファイルをインストールしたい場合はパッケージのインストールディレクトリ(mainパッケージが置かれているディレクトリ)に移動し(cd vendor/github.com/user/thing/cmd/thing) go install . でインストールする必要があります。

% cd vendor/github.com/pressly/goose/cmd
% goenv exec go install .

FROM golang:1.11.0

RUN apt update

# PostgreSQLのClientをインストール
RUN apt install -y postgresql-client

WORKDIR /go/src/dairy_report
ADD src/dairy_report/Gopkg.toml Gopkg.toml
ADD src/dairy_report/Gopkg.lock Gopkg.lock
# depだけgo getで取得
RUN go get -u github.com/golang/dep/cmd/dep

RUN dep ensure --vendor-only
WORKDIR /go/src/dairy_report/vendor/github.com/pressly/goose/cmd/goose/
RUN go install .

WORKDIR /go/src/dairy_report

version: '3'
volumes:
  vendor:
services:
  web:
    build:
      context: .
      dockerfile: Dockerfile
    command: go run main.go
    volumes:
      - ./src/dairy_report/:/go/src/dairy_report/
      - vendor:/go/src/dairy_report/vendor
(中略)

% goenv exec gofmt -d main.go                                                                                                                                                   (git)-[feature/add_login]
diff -u main.go.orig main.go
--- main.go.orig    2018-11-11 00:22:28.000000000 +0900
+++ main.go 2018-11-11 00:22:28.000000000 +0900
@@ -1,12 +1,12 @@
 package main

 import (
+   "database/sql"
    "fmt"
+   _ "github.com/lib/pq"
+   "github.com/yosssi/ace"
    "log"
    "net/http"
-   "github.com/yosssi/ace"
-   "database/sql"
-   _ "github.com/lib/pq"
 )

 func login_handler(w http.ResponseWriter, r *http.Request) {
@@ -33,7 +33,7 @@
        fmt.Println("username:", r.FormValue("username"))
        fmt.Println("password:", r.FormValue("password"))

-       user := User{ r.FormValue("username"), r.FormValue("password")}
+       user := User{r.FormValue("username"), r.FormValue("password")}
        db, err := sql.Open("postgres", "host=db user=dairy_report password=dairy_report dbname=dairy_report_development sslmode=disable")
        if err != nil {
            fmt.Println(err)

%  goenv exec gofmt -w main.go
% git diff
diff --git a/src/dairy_report/main.go b/src/dairy_report/main.go
index 75bfcc5..35375ca 100644
--- a/src/dairy_report/main.go
+++ b/src/dairy_report/main.go
@@ -1,12 +1,12 @@
 package main

 import (
+       "database/sql"
        "fmt"
+       _ "github.com/lib/pq"
+       "github.com/yosssi/ace"
        "log"
        "net/http"
-       "github.com/yosssi/ace"
-       "database/sql"
-       _ "github.com/lib/pq"
 )

 func login_handler(w http.ResponseWriter, r *http.Request) {
@@ -33,7 +33,7 @@ func login_handler(w http.ResponseWriter, r *http.Request) {
                fmt.Println("username:", r.FormValue("username"))
                fmt.Println("password:", r.FormValue("password"))

-               user := User{ r.FormValue("username"), r.FormValue("password")}
+               user := User{r.FormValue("username"), r.FormValue("password")}
                db, err := sql.Open("postgres", "host=db user=dairy_report password=dairy_report dbname=dairy_report_development sslmode=disable")
                if err != nil {
                        fmt.Println(err)

env:
  global:
    - REVIEWDOG_VERSION="0.9.11"
sudo: false
language: go
go:
  - 1.11.2
install:
  - go get -u golang.org/x/lint/golint
  - mkdir -p ~/bin/ && export export PATH="~/bin/:$PATH"
  - curl -fSL https://github.com/haya14busa/reviewdog/releases/download/$REVIEWDOG_VERSION/reviewdog_linux_amd64 -o ~/bin/reviewdog && chmod +x ~/bin/reviewdog

script:
  - golint ./... | reviewdog -f=golint -reporter=github-pr-review