How Can I Simultaneously Build Multiple Package Binaries in a Go Project?

Building Multiple Package Binaries Simultaneously

With multiple packages under one project, building each binary individually can be tedious. This article explores how to build all binaries in one step.

Using a Script for Multiple Binaries

The default advice to use a "cmd" folder as the root directory for multiple package binaries is not always effective. Instead, consider using a script that iterates through the packages in the "cmd" directory and builds each one individually.

cd $GOPATH/someProject
for CMD in `ls cmd`; do
  go build ./cmd/$CMD
done

This script will create the aforementioned directory structure with individually built binaries in the "bin" directory.

Alternative Solutions

For more complex projects, you may need additional functionality or integration with a build system. Here are a few popular options:

• Makefiles: Makefiles provide a flexible way to define build rules and dependencies. [Grafana's build.go](https://github.com/grafana/grafana/blob/master/build.go) is an excellent example of a Makefile used for building multiple binaries.
• Go build's Build Tags: Build tags allow you to compile specific subdirectories. [Torus' Makefile](https://github.com/coreos/torus/blob/master/Makefile) demonstrates how to build multiple binaries using build tags.
• Custom Build Scripts: You can create custom scripts that handle the building and packaging process. [Caddy's automate.go](https://github.com/mholt/caddy/blob/master/dist/automate.go) is an example of a custom build script.

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