bump_version

This is a tool for bumping version numbers in Go files.

Installation

For the moment, you'll need a working Go installation.

go install github.com/kevinburke/bump_version@latest
go install github.com/kevinburke/bump_version/current_version@latest
go install github.com/kevinburke/bump_version/next_version@latest

That will install the bump_version binary to your $GOPATH.

Usage

bump_version <major|minor|patch> <filename>

This will:

Look for a const named version, VERSION, or Version in that file. Here's an example:
```
package main

const VERSION = "0.2.1"
```
Apply the version bump - bump_version major will increment the major version number, bump_version minor will increment the middle version number, bump_version patch will increment the last version number. If your version is "0.3" and you ask for bump_version minor, the new version will be "0.4".
Write the new file to disk, with the bumped version.
Add the file with git add <filename>.
Add a commit with the message "x.y.z" (git commit -m "<new_version>")
Tag the new version.

If any of these steps fail, bump_version will abort.

current_version

This program will retrieve the current version from a Go source file.

# current_version main.go
0.6.0

next_version

This program will retrieve the current version from a Go source file, and then print out the result of incrementing it (without actually making any changes).

# next_version patch main.go
0.6.1

Notes

The VERSION in the Go file should be a string in one of these formats: "3", "0.3", "0.3.4". Any prefixes like "v" or suffixes like "0.3.3-beta" will be stripped or generate an error.

"v0.1" - parse error, no prefixes allowed.
bump_version("0.1", "minor") -> "0.2"
bump_version("0.1", "patch") -> "0.1.1"
bump_version("0.1", "major") -> "1.1"
bump_version("0.1-beta", "major") -> "1.1"
bump_version("devel", "major") -> parse error.

To add a prefix to the Git tag, add the --tag-prefix flag, for example --tag-prefix=v will generate a Git tag that looks like "v1.2.3".

We use the VERSION in code exclusively - any existing git tags are ignored.

Alan Shreve would like to note that you probably shouldn't store version numbers in code - instead, check in const VERSION = "devel", then build your project via:

go build -ldflags="-X main.VERSION=0.2"