New to go. I'm familiar with the ability to consume build tags in source files like so:
// +build linux arm,!linux
but is there any way to create/export build tags in a source file? Something like:
// +build +custom_tag_name
I'm trying to do what the -tags argument does inside of a source file instead of adding it to a makefile so that when a library is added to a project, it will "set" certain tags that can be used in other files.
You can't do that. Source files can only set build constraints on themselves, they can't satisfy constraints. Constraints can only be satisfied as noted - implicitly by the environment, or explicitly via the -tags flag. Build constraints are a way to achieve environment-sensitive conditional compilation. Using one source file to control the build of another doesn't really make sense; you know at build time whether file A is in the build, so you know whether file B should be in the build. This seems like an XY Problem, possibly better solved by a mechanism similar to that of the SQL drivers (registering a handler in an init function) or something like that?