Automatically fetch own package name for running binary

cmd/go-away/main.go

@@ -17,6 +17,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"runtime/debug"
 	"strconv"
 	"strings"
 )
@@ -55,6 +56,15 @@ func setupListener(network, address, socketMode string) (net.Listener, string) {
 	return listener, formattedAddress
 }
 
+var internalPackageName = func() string {
+
+	buildInfo, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "go-away"
+	}
+	return buildInfo.Path
+}()
+
 type MultiVar []string
 
 func (v *MultiVar) String() string {
@@ -78,7 +88,7 @@ func main() {
 	challengeTemplate := flag.String("challenge-template", "anubis", "name or path of the challenge template to use (anubis, forgejo)")
 	challengeTemplateTheme := flag.String("challenge-template-theme", "", "name of the challenge template theme to use (forgejo => [forgejo-dark, forgejo-light, gitea...])")
 
-	packageName := flag.String("package-path", "git.gammaspectra.live/git/go-away/cmd/go-away", "package name to expose in .well-known url path")
+	packageName := flag.String("package-path", internalPackageName, "package name to expose in .well-known url path")
 
 	jwtPrivateKeySeed := flag.String("jwt-private-key-seed", "", "Seed for the jwt private key, or on JWT_PRIVATE_KEY_SEED env. One be generated by passing \"generate\" as a value, follows RFC 8032 private key definition. Defaults to random")