gui: Handle theme versioning in the specified package

Signed-off-by: Mohd Faraz <androiabledroid@gmail.com>
Change-Id: I40d727cd42c778a2c09a72043ce75c7c8b9cfacb

Android.mk

@@ -566,12 +566,6 @@ endif
 
 LOCAL_REQUIRED_MODULES += $(TWRP_REQUIRED_MODULES)
 
-TW_THEME_VERSION := $(shell grep TW_THEME_VERSION bootable/recovery/variables.h | cut -d ' ' -f 3)
-
-LOCAL_POST_INSTALL_CMD += \
-    sed -i "s/{themeversion}/$(TW_THEME_VERSION)/" $(TARGET_RECOVERY_ROOT_OUT)/twres/splash.xml; \
-    sed -i "s/{themeversion}/$(TW_THEME_VERSION)/" $(TARGET_RECOVERY_ROOT_OUT)/twres/ui.xml;
-
 include $(BUILD_EXECUTABLE)
 
 # Symlink for file_contexts

gui/libguitwrp_defaults.go

@@ -4,6 +4,7 @@ import (
 	"android/soong/android"
 	"android/soong/cc"
 	"fmt"
+	"io/ioutil"
 	"os"
 	"path"
 	"strconv"
@@ -64,6 +65,31 @@ func copyThemeResources(ctx android.BaseContext, dirs []string, files []string)
 		fileDest := twRes + path.Base(file)
 		copyFile(fileToCopy, fileDest)
 	}
+	data, err := ioutil.ReadFile(recoveryDir + "variables.h")
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	version := "0"
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.Contains(line, "TW_THEME_VERSION") {
+			version = strings.Split(line, " ")[2]
+		}
+	}
+	_files := [2]string{"splash.xml", "ui.xml"}
+	for _, i := range _files {
+		data, err = ioutil.ReadFile(twRes + i)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		newFile := strings.Replace(string(data), "{themeversion}", version, -1)
+		err = ioutil.WriteFile(twRes + i, []byte(newFile), 0)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+	}
 }
 
 func copyCustomTheme(ctx android.BaseContext, customTheme string) {