ignore signing without property

app/build.gradle

@@ -20,6 +20,7 @@ def gitCommits = Integer.parseInt('git rev-list --count HEAD'.execute([], projec
 android {
     compileSdkVersion 29
     signingConfigs {
+        if (project.hasProperty("RELEASE_STORE_FILE")) {
             myConfig {
                 storeFile file(RELEASE_STORE_FILE)
                 storePassword RELEASE_STORE_PASSWORD
@@ -29,6 +30,7 @@ android {
                 v2SigningEnabled true
             }
         }
+    }
     defaultConfig {
         applicationId "io.legado.app"
         minSdkVersion 21
@@ -49,12 +51,16 @@ android {
     }
     buildTypes {
         release {
+            if (project.hasProperty("RELEASE_STORE_FILE")) {
                 signingConfig signingConfigs.myConfig
+            }
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
         debug {
+            if (project.hasProperty("RELEASE_STORE_FILE")) {
                 signingConfig signingConfigs.myConfig
+            }
             applicationIdSuffix '.debug'
             versionNameSuffix 'debug'
             minifyEnabled false