检查以确定go代码是否已格式化

Question

My goal is to enforce the formatting of go source code on commit. Is there a way to find out if running go fmt over a file/set of files would make any changes? The only technique I can think of is to:

• store the current time t
• run go fmt over the source
• iterate the source files to see if any of the last mod dates > t

I could write a tool/script to do this and execute during circle CI build. I wanted to check that I'm not reinventing the wheel before I go ahead.

Answer 1

According to gofmt -h you can use -l option:

-l list files whose formatting differs from gofmt's`

Something like:

> gofmt -l .

And pass the received list of files further.