开发web api或web项目，修改源码后，无需手动重启即可查看效果，使用air即可实现。

安装air：go get -v -u github.com/cosmtrek/air（或下载所有源码后，go build，得到air.exe，拷贝到$goroot/bin目录）

在项目目录下，创建.air.config文件，修改[build]中的cmd配置，设置为goland编译程序的命令行命令：

cmd = "go build -o ./tmp/xxx-demo.exe ./main.go"

最终配置文件如下：

# Config file for [Air](https://github.com/cosmtrek/air) in TOML format # Working directory# . or absolute path, please note that the directories following must be under root.root = "."tmp_dir = "tmp" [build]# Just plain old shell command. You could use `make` as well.cmd = "go build -o ./tmp/xxx-demo.exe ./main.go"# Binary file yields from `cmd`.bin = "tmp/xxx-demo.exe"# Customize binary.full_bin = "APP_ENV=dev APP_USER=air ./tmp/main"# Watch these filename extensions.include_ext = ["go", "tpl", "tmpl", "html"]# Ignore these filename extensions or directories.exclude_dir = ["assets", "tmp", "vendor", "frontend/node_modules"]# Watch these directories if you specified.include_dir = []# Exclude files.exclude_file = []# It's not necessary to trigger build each time file changes if it's too frequent.delay = 1000 # ms# Stop to run old binary when build errors occur.stop_on_error = true# This log file places in your tmp_dir.log = "air_errors.log" [log]# Show log timetime = false [color]# Customize each part's color. If no color found, use the raw app log.main = "magenta"watcher = "cyan"build = "yellow"runner = "green" [misc]# Delete tmp directory on exitclean_on_exit = true

goland中打开项目，在Terminal中运行air命令，即可自动监控项目代码修改，自动热启动服务，方便开发调试。

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