Use try/catch with logging for version number

Source/Android/app/build.gradle

@@ -1,5 +1,3 @@
-import org.apache.tools.ant.taskdefs.condition.Os
-
 apply plugin: 'com.android.application'
 
 android {
@@ -96,12 +94,15 @@ dependencies {
 }
 
 def getVersion() {
-    String result
-    if(Os.isFamily(Os.FAMILY_WINDOWS)) {
-        result = 'cmd /c git describe --always --long'.execute([], project.rootDir).text
-    } else {
-        result = 'git describe --always --long'.execute([], project.rootDir).text
+    def versionNumber = '0.0'
+
+    try {
+        versionNumber = 'git describe --always --long'.execute([], project.rootDir).text
+                .trim()
+                .replaceAll(/(-0)?-[^-]+$/, "")
+    } catch (Exception e) {
+        logger.error('Cannot find git, defaulting to dummy version number')
     }
 
-    return result.trim().replaceAll(/(-0)?-[^-]+$/, "")
+    return versionNumber
 }