versioning

Easy versioning for your Go binaries

💥 NOTE: You can use this as a library, but it's so small that you probably shouldn't. Instead, just copy/paste from this gist 💥

This library, along with the following instructions, add the following flags to your Go binary:

• --rev: prints the git revision used to build binary
• --version: prints the latest version, determined either by tags or the latest commit hash

Using the "golang version trick"

0. Import the package into any of your .go files

   import "github.com/rafecolton/versioning"

1. Add the command line args by adding the following to your init() function in the same .go file

   versioning.Parse()

   NOTE: It is not required that this call be made in your init() function, but it is strongly recommended. For it to work correctly, it must be made before your call to flag.Parse() (or similar), otherwise flag will explode due to unrecognized args.

2. Add the ldflags to your Makefile

   This step is the secret sauce that actually makes this work. First, add the vars you'll need.

REV_VAR := github.com/rafecolton/versioning.RevString
VERSION_VAR := github.com/rafecolton/versioning.VersionString
REPO_VERSION := $(shell git describe --always --dirty --tags)
REPO_REV := $(shell git rev-parse --sq HEAD)
GOBUILD_VERSION_ARGS := -ldflags "-X $(REV_VAR) $(REPO_REV) -X $(VERSION_VAR) $(REPO_VERSION)"

Then, add the args to your go install command. For example,

go install -x $(TARGETS)

becomes

go install $(GOBUILD_VERSION_ARGS) -x $(TARGETS)

0. Don't forget to include a go get command to pull down the required library.

1. make and enjoy!