chore: use Go stdlib version stamping (#1665)

* chore: use Go stdlib version stamping

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: spelling

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>

.github/actions/spelling/allow.txt

@@ -44,3 +44,4 @@ xou
 AWOO
 firewalls
 bindhosts
+handrolled

.ko.yaml

@@ -10,4 +10,3 @@ builds:
     ldflags:
       - -s -w
       - -extldflags "-static"
-      - -X github.com/TecharoHQ/anubis.Version={{.Env.VERSION}}

anubis.go

@@ -1,12 +1,27 @@
 // Package anubis contains the version number of Anubis.
 package anubis
 
-import "time"
+import (
+	"runtime/debug"
+	"time"
+)
+
+func init() {
+	bi, ok := debug.ReadBuildInfo()
+	if !ok {
+		return
+	}
+
+	// XXX(Xe): many things in this repo assume that the development version
+	// of anubis is `devel` and ReadBuildInfo returns `(devel)`. Shim the gap.
+	if bi.Main.Version != "(devel)" {
+		Version = bi.Main.Version
+	}
+}
 
 // Version is the current version of Anubis.
 //
-// This variable is set at build time using the -X linker flag. If not set,
+// This is set from the Go module runtime version.
-// it defaults to "devel".
 var Version = "devel"
 
 // CookieName is the name of the cookie that Anubis uses in order to validate

docs/docs/CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improve error messages and fix broken REDIRECT_DOMAINS link in docs ([#1193](https://github.com/TecharoHQ/anubis/issues/1193))
 - Add Bulgarian locale ([#1394](https://github.com/TecharoHQ/anubis/pull/1394))
 - Fixed case-sensitivity mismatch in geoipchecker.go
+- Use [Go's native version stamping](https://michael.stapelberg.ch/posts/2026-04-05-stamp-it-all-programs-must-report-their-version/) instead of a handrolled variant.
 - Fix CEL internal errors when iterating `headers`/`query` map wrappers by implementing map iterators for `HTTPHeaders` and `URLValues` ([#1465](https://github.com/TecharoHQ/anubis/pull/1465)).
 - Enable [metrics serving via TLS](./admin/policies.mdx#tls), including [mutual TLS (mTLS)](./admin/policies.mdx#mtls).
 - Enable [HTTP basic auth](./admin/policies.mdx#http-basic-authentication) for the metrics server.

yeetfile.js

@@ -17,8 +17,8 @@ $`npm run assets`;
       },
 
       build: ({ bin, etc, systemd, doc }) => {
-        $`go build -o ${bin}/anubis -ldflags '-s -w -extldflags "-static" -X "github.com/TecharoHQ/anubis.Version=${git.tag()}"' ./cmd/anubis`;
+        $`go build -o ${bin}/anubis -ldflags '-s -w -extldflags "-static" ./cmd/anubis`;
-        $`go build -o ${bin}/anubis-robots2policy -ldflags '-s -w -extldflags "-static" -X "github.com/TecharoHQ/anubis.Version=${git.tag()}"' ./cmd/robots2policy`;
+        $`go build -o ${bin}/anubis-robots2policy -ldflags '-s -w -extldflags "-static"' ./cmd/robots2policy`;
 
         file.install("./run/anubis@.service", `${systemd}/anubis@.service`);
         file.install("./run/default.env", `${etc}/default.env`);