下载dlv

命令行上操作：
$ git clone https://github.com/go-delve/delve.git $GOPATH/src/github.com/go-delve/delve

注意：如果你本地已经下载过dlv，可以删除重新下载(先备份好)，git安装自己搞定，很简单。

下载完成如下所示

localhost:~ zhenhua$ git clone https://github.com/go-delve/delve.git $GOPATH/src/github.com/go-delve/delve
Cloning into ‘/Users/zhenhua/go/src/github.com/go-delve/delve’…
remote: Enumerating objects: 21408, done.
remote: Counting objects: 100% (1612/1612), done.
remote: Compressing objects: 100% (987/987), done.
remote: Total 21408 (delta 870), reused 1186 (delta 582), pack-reused 19796
Receiving objects: 100% (21408/21408), 28.09 MiB | 89.00 KiB/s, done.
Resolving deltas: 100% (14223/14223), done.

在命令行中cd 到 dlv下载所在目录：

delve zhenhua$ make install
Password:
go install -tags=macnative “-ldflags=-s -X main.Build=9013a121d8bc6359018bccfaa1f256a8870d01c7” github.com/go-delve/delve/cmd/dlv
codesign -s dlv-cert /Users/zhenhua/go/bin/dlv

此时可以在你的GOPATH/bin目录下看到dlv可执行文件

敲入dlv验证安装成功

$ dlv
Delve is a source level debugger for Go programs.
Delve enables you to interact with your program by controlling the execution of the process,
evaluating variables, and providing information of thread / goroutine state, CPU register state and more.
The goal of this tool is to provide a simple yet powerful interface for debugging Go programs.
Usage:
…中间省略一大段…
Additional help topics:
dlv backend Help about the –backend flag.
dlv log Help about logging flags.
dlv redirect Help about file redirection.
Use “dlv [command] –help” for more information about a command.。