热启动的意义在于，当你更改了代码，不用自己手动的编译，系统检查到代码的变化，自动重启，大大提高开发效率！下面是安装步骤，非常简单~

1、安装 air

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go get -u github.com/air-verse/air

2、进入到项目的根目录，在终端执行下面的命令，得到.air.toml

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air init

3、根据实际项目，调整.air.toml 中的内容，air 将按照下面规则热重启，建议理解每个参数的意思

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root = "D:/project/your-project-name"  # 项目根目录位置

[build]
  pre_cmd = ["source pre_env.sh","bee generate docs"] # 在 go buid 前的命令，这里第一个是导入环境变量，第二个是更新 swagger 接口文档和路由
  args_bin = []
  bin = "./tmp/main.exe"  # 运行编译好的文件命令
  cmd = "go build -o ./tmp/main.exe your-project-name" #构建项目命令
  delay = 1000
  exclude_dir = ["tmp", "vendor", "testdata" ,"logs" ,".idea",".git","docker"] # 排除这些文件
  exclude_file = []
  exclude_regex = ["_test.go"]
  exclude_unchanged = false
  follow_symlink = false
  full_bin = ""
  include_dir = []
  include_ext = ["go", "tpl", "tmpl", "html" ,"ini" ,"conf"] # 这些文件一旦变化并保存就会触发重新构建并启动
  include_file = []
  kill_delay = "1s"
  log = "build-errors.log"  #生成的日志名
  poll = false
  poll_interval = 0
  post_cmd = []
  pre_cmd = []
  rerun = false
  rerun_delay = 500
  send_interrupt = false
  stop_on_error = false

...

4、在项目根目录下，终端执行 air，便可实现使用 Air 实现 Go 程序热启动

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air

参考