2. gopath

GOPATH 是 Go语言中使用的一个环境变量，它使用绝对路径提供项目的工作目录。

➜  ~ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/dxm/Library/Caches/go-build"
GOENV="/Users/dxm/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/dxm/go"
GOPRIVATE=""
GOPROXY="https://mirrors.aliyun.com/goproxy/"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/3p/jc3w8_dn5dd0r5_5ccp3nrqm0000gn/T/go-build619420410=/tmp/go-build -gno-record-gcc-switches -fno-common"

2.1. 使用gopath工程结构

export GOPATH=`pwd`
mkdir -p src/hello

填写代码

go install hello