fix(ci): preserve installer compatibility with older releases

cmd/felis/bootstrap_assets.go

@@ -9,10 +9,17 @@ import (
 
 func cmdBootstrapAssets(args []string, stdout, stderr io.Writer) int {
 	if len(args) != 1 {
-		fmt.Fprintln(stderr, "felis bootstrap-assets: usage: felis bootstrap-assets crd|game-stack")
+		fmt.Fprintln(stderr, "felis bootstrap-assets: usage: felis bootstrap-assets crd|game-stack|config-keys")
 		return 2
 	}
 	switch args[0] {
+	case "config-keys":
+		// Optional keys the installer may emit; older binaries reject this verb.
+		_, err := fmt.Fprintln(stdout, "velocity.game_version")
+		if err != nil {
+			fmt.Fprintf(stderr, "felis bootstrap-assets: write: %v\n", err)
+			return 1
+		}
 	case "crd":
 		crd, err := felis.MinecraftServerCRD()
 		if err != nil {
@@ -32,7 +39,7 @@ func cmdBootstrapAssets(args []string, stdout, stderr io.Writer) int {
 			return 1
 		}
 	default:
-		fmt.Fprintln(stderr, "felis bootstrap-assets: usage: felis bootstrap-assets crd|game-stack")
+		fmt.Fprintln(stderr, "felis bootstrap-assets: usage: felis bootstrap-assets crd|game-stack|config-keys")
 		return 2
 	}
 	return 0

cmd/felis/run_test.go

@@ -5,8 +5,27 @@ import (
 	"os"
 	"strings"
 	"testing"
+
+	"github.com/BurntSushi/toml"
+
+	"felis.lolicon.best/internal/config"
 )
 
+func TestBootstrapConfigKeys(t *testing.T) {
+	var out, errBuf bytes.Buffer
+	if code := run([]string{"bootstrap-assets", "config-keys"}, &out, &errBuf); code != 0 {
+		t.Fatalf("exit code = %d: %s", code, errBuf.String())
+	}
+	var cfg config.Config
+	meta, err := toml.Decode(strings.TrimSpace(out.String())+` = "26.3"`, &cfg)
+	if err != nil || len(meta.Undecoded()) != 0 {
+		t.Fatalf("advertised config key is unsupported: %v, undecoded: %v", err, meta.Undecoded())
+	}
+	if cfg.Velocity.GameVersion != "26.3" {
+		t.Fatalf("advertised key did not set the game version: %q", cfg.Velocity.GameVersion)
+	}
+}
+
 func TestRunNoArgsPrintsUsage(t *testing.T) {
 	var out, errBuf bytes.Buffer
 	if code := run(nil, &out, &errBuf); code != 2 {