Building Modern CLI Applications in Go by Marian Montagnino

Author:Marian Montagnino
Language: eng
Format: epub
Publisher: Packt Publishing Pvt Ltd
Published: 2023-03-09T00:00:00+00:00

Build tags for targeted platforms

Built tags, or build constraints, can be used for many purposes, but in this section, we will be discussing how to use build tags to identify which files should be included in a package when building for specific operating systems. Build tags are given in a comment at the top of a file:

//go:build

Build tags are passed in as flags when running go build. There could be more than one tag on a file, and they follow on from the comment with the following syntax:

//go:build [tags]

Each tag is separated by a space. Suppose we want to indicate that this file will only be included in a build for the Darwin operating system, then we would add this to the top of the file:

//go:build darwin

Then when building the application, we would use something like this:

go build –tags darwin

This is just a super quick overview of how build tags can be used to constrain files specific to operating systems. Before we go into an implementation of this, let’s discuss the build package in a bit more detail.

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