chore: change qt version

go/cmd/updater/launcher_linux.go

@@ -6,7 +6,6 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
-	"runtime"
 )
 
 var local_qt_theme bool
@@ -16,18 +15,19 @@ func Launcher() {
 	wd, _ := filepath.Abs(".")
 
 	_debug := flag.Bool("debug", false, "Debug mode")
-	flag.BoolVar(&local_qt_theme, "theme", false, "Use local QT theme (unstable)")
 	flag.Parse()
 
-	// Find & symlink some Qt Plugin to enable system theme
-	tryLinkQtPlugin("styles", !local_qt_theme)
-	tryLinkQtPlugin("platformthemes", !local_qt_theme)
-
 	cmd := exec.Command("./nekoray", flag.Args()...)
-	cmd.Env = os.Environ()
+
 	ld_env := "LD_LIBRARY_PATH=" + filepath.Join(wd, "./usr/lib")
-	cmd.Env = append(cmd.Env, ld_env)
-	log.Println(ld_env, cmd)
+	qt_plugin_env := "QT_PLUGIN_PATH=" + filepath.Join(wd, "./usr/plugins")
+
+	// Qt 5.12 abi is usually compatible with system Qt 5.15
+	// But use package Qt 5.12 by default.
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, "NKR_FROM_LAUNCHER=1")
+	cmd.Env = append(cmd.Env, ld_env, qt_plugin_env)
+	log.Println(ld_env, qt_plugin_env, cmd)
 
 	if *_debug {
 		cmd.Env = append(cmd.Env, "QT_DEBUG_PLUGINS=1")
@@ -39,39 +39,3 @@ func Launcher() {
 		cmd.Start()
 	}
 }
-
-func tryLinkQtPlugin(sub string, remove bool) {
-	wd_plugins_sub := filepath.Join("./usr/plugins", sub)
-
-	if Exist(wd_plugins_sub) {
-		if remove {
-			os.RemoveAll(wd_plugins_sub)
-		}
-	} else {
-		if remove {
-			return
-		}
-
-		arch := "x86_64"
-		if runtime.GOARCH == "arm64" {
-			arch = "aarch64"
-		}
-
-		paths := []string{
-			filepath.Join("/usr/lib/qt5/plugins", sub),
-			filepath.Join("/usr/lib64/qt5/plugins", sub),
-			filepath.Join("/usr/lib/"+arch+"-linux-gnu/qt5/plugins", sub),
-			filepath.Join("/usr/lib/qt/plugins", sub),
-		}
-		path := FindExist(paths)
-		if path == "" {
-			log.Println("warning:", sub, "not found")
-			return
-		}
-
-		err := os.Symlink(path, wd_plugins_sub)
-		if err != nil {
-			log.Println("symlink failed:", err.Error())
-		}
-	}
-}