DocSavage/tagtest

Example of how to use Go's build constraints for conditional compilation.

This repo is a quick way to test Go's build constraints for conditional compilation.

Examine the first line of foo.go, bar.go, and default.go.

You'll see a build constraint at the top of each file. Read Build Constraints documentation.

Play with build tags

You can specify arbitrary build tags. Read how to specify build tags with the go command.

Try the following:

% go build -tags 'foo'
% ./tagtest

This should only compile foo.bar.

% go build -tags 'bar'
% ./tagtest
% go build
% ./tagtest
% go build -tags 'foo bar'

The last one will give you an error since you are trying to compile two hello() in package main.