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export GO111MODULE=on
export GOPROXY=https://goproxy.cn
export GOROOT=/usr/local/go
export GOPATH=~/go/path
export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

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source /etc/profile ##在当前bash环境下读取并执行profile中的命令。
go env 

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package main

import "github.com/gin-gonic/gin"

func main() {
    // 创建一个默认的Gin引擎
    r := gin.Default()

    // 定义一个简单的GET请求路由
    r.GET("/", func(c *gin.Context) {
        c.String(200, "Hello, Gin!")
    })

    // 启动HTTP服务器，监听在 8080 端口
    r.Run(":8080")
}

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go mod init example.com/gin_demo
go mod tidy
go build

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go build -o main.exe main.go

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let g:syntastic_go_checkers = ['govet', 'errcheck', 'go']

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go install github.com/nsf/gocode@latest
go install github.com/golang/lint@latest

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malformed import path "go: cannot find main module, but found .git/config in /data/test": invalid ch

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sudo vim /etc/sudoers
Defaults    secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/usr/local/go/bin"