posts/version.go

package main

import "runtime/debug"

// version is the release number shown on the About page. Bump it in the PR
// that makes a user-visible change.
const version = "0.5.3"

// commitInfo is the git revision `go build` stamped into the binary. Full is
// empty when the binary was built outside a git checkout (for example by
// `go test`); Dirty means the tree had uncommitted changes, so the build
// doesn't match any commit exactly.
type commitInfo struct {
	Full, Short string
	Dirty       bool
}

func buildCommit() commitInfo {
	info, ok := debug.ReadBuildInfo()
	if !ok {
		return commitInfo{}
	}
	var c commitInfo
	for _, s := range info.Settings {
		switch s.Key {
		case "vcs.revision":
			c.Full = s.Value
		case "vcs.modified":
			c.Dirty = s.Value == "true"
		}
	}
	c.Short = c.Full
	if len(c.Short) > 7 {
		c.Short = c.Short[:7]
	}
	return c
}