golang 经常使用命令

如下命令基于go版本1.15.3进行测试

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基本命令

go help
go env
go version

交叉编译

# Windows下编译Linux

SET CGO_ENABLED=0
SET GOARCH=amd64
SET GOOS=linux

go build xx.go

编译参数

go build

• 当编译包时，会自动忽略'_test.go'的测试文件。

# go build -o 指定编译输出的名称 
# win下编译生成指定名称的可执行文件
go build -o custom.exe send.go

gofmt 和 go fmt

go fmt 是 gofmt的简易封装

go fmt 即 gofmt -l -w

传入文件的话，会格式化这个文件。传入目录的话，会格式化该目录下的全部.go文件

// 经常使用go fmt
go fmt send.go

// gofmt 参数
usage: gofmt [flags] [path ...]
  -cpuprofile string
        write cpu profile to this file
  -d    display diffs instead of rewriting files
  -e    report all errors (not just the first 10 on different lines)
  -l    list files whose formatting differs from gofmt's
  -r string
        rewrite rule (e.g., 'a[b:len(a)] -> a[b:]')
  -s    simplify code
  -w    write result to (source) file instead of stdout

// go fmt 参数 
usage: go fmt [-n] [-x] [packages]

Fmt runs the command 'gofmt -l -w' on the packages named
by the import paths. It prints the names of the files that are modified.

For more about gofmt, see 'go doc cmd/gofmt'.
For more about specifying packages, see 'go help packages'.

The -n flag prints commands that would be executed.
The -x flag prints commands as they are executed.

To run gofmt with specific options, run gofmt itself.

See also: go fix, go vet.