// Package buildinfo reports the Crucible build version.
//
// Version is empty in plain `go build`; the build scripts and Dockerfile inject
// the short git sha via -ldflags. As a fallback we read the VCS revision that
// the Go toolchain stamps into the binary, so a binary built without -ldflags
// still self-identifies.
package buildinfo

import "runtime/debug"

// Version is overridable at link time:
//
//	-ldflags "-X gitea.westgate.pw/ShadowsOverWestgate/sow-tools/internal/buildinfo.Version=<sha>"
var Version = ""

// String returns a human-readable version line, e.g. "crucible 8f31c2a".
func String() string {
	return "crucible " + revision()
}

func revision() string {
	if Version != "" {
		return Version
	}
	if bi, ok := debug.ReadBuildInfo(); ok {
		for _, s := range bi.Settings {
			if s.Key == "vcs.revision" && s.Value != "" {
				return s.Value
			}
		}
	}
	return "devel"
}