echoのインストール

echoのセットアップ（作業メモ）

echo Goで書かれたWebサーバー。
これを使ってAPIサーバー作りたい。

glideのインストール

Goのパッケージ管理ツールであるglideをインストール。
Homebrewで一発。

$brew install glide

作業ディレクトリ作成

$ mkdir -p goworks/src/echo_sample
$ cd goworks

作業ディレクトリ配下にGOPATHを設定
cf. direnv参考サイト

$ vim .envrc
export GOPATH=$(pwd) ←追記

$ direnv allow
direnv: loading .envrc
direnv: export +GOPATH

echo_sample配下にgoファイルを作成。

$ vim server.go

公式のGetStartページ からコピペ。

package main

import (
    "net/http"

    "github.com/labstack/echo"
)

func main() {
    e := echo.New()
    e.GET("/", func(c echo.Context) error {
        return c.String(http.StatusOK, "Hello, World!")
    })
    e.Logger.Fatal(e.Start(":1323"))
}

glideでechoをインストール

$ glide create
[INFO]  Generating a YAML configuration file and guessing the dependencies
[INFO]  Attempting to import from other package managers (use --skip-import to skip)
[INFO]  Scanning code to look for dependencies
[INFO]  Writing configuration file (glide.yaml)
[INFO]  Would you like Glide to help you find ways to improve your glide.yaml configuration?
[INFO]  If you want to revisit this step you can use the config-wizard command at any time.
[INFO]  Yes (Y) or No (N)?
Y
[INFO]  Looking for dependencies to make suggestions on
[INFO]  --> Scanning for dependencies not using version ranges
[INFO]  --> Scanning for dependencies using commit ids
[INFO]  Gathering information on each dependency
[INFO]  --> This may take a moment. Especially on a codebase with many dependencies
[INFO]  --> Gathering release information for dependencies
[INFO]  --> Looking for dependency imports where versions are commit ids
[INFO]  No proposed changes found. Have a nice day.

パッケージをインストール

$ $ glide install
[INFO]  Lock file (glide.lock) does not exist. Performing update.
[INFO]  Downloading dependencies. Please wait...
[INFO]  --> Fetching updates for github.com/labstack/echo.
[INFO]  --> Detected semantic version. Setting version for github.com/labstack/echo to v3.2.1.
[INFO]  Resolving imports
[INFO]  --> Fetching updates for github.com/labstack/gommon.
[INFO]  --> Fetching updates for golang.org/x/crypto.
[INFO]  --> Fetching updates for github.com/mattn/go-colorable.
[INFO]  --> Fetching updates for github.com/mattn/go-isatty.
[INFO]  --> Fetching updates for github.com/valyala/fasttemplate.
[INFO]  --> Fetching updates for golang.org/x/sys.
[INFO]  --> Fetching updates for github.com/valyala/bytebufferpool.
[INFO]  Downloading dependencies. Please wait...
[INFO]  Setting references for remaining imports
[INFO]  Exporting resolved dependencies...
[INFO]  --> Exporting github.com/labstack/echo
[INFO]  --> Exporting github.com/labstack/gommon
[INFO]  --> Exporting github.com/mattn/go-isatty
[INFO]  --> Exporting github.com/valyala/fasttemplate
[INFO]  --> Exporting github.com/mattn/go-colorable
[INFO]  --> Exporting github.com/valyala/bytebufferpool
[INFO]  --> Exporting golang.org/x/crypto
[INFO]  --> Exporting golang.org/x/sys
[INFO]  Replacing existing vendor dependencies
[INFO]  Project relies on 8 dependencies.

goworks/src配下に、こんな感じの構成でechoがインストールされる。
インストール済みパッケージの情報はglide.lockに記録されてる。

echo_smaple/
├── glide.lock
├── glide.yaml
└── vendor
    └── github.com
        └── labstack
            └── echo

echoを動かしてみる

$ go run server.go

   ____    __
  / __/___/ /  ___
 / _// __/ _ \/ _ \
/___/\__/_//_/\___/ v3.2.1
High performance, minimalist Go web framework
https://echo.labstack.com
____________________________________O/_______
                                    O\
⇨ http server started on [::]:1323

動いた。