Changed version number to git commit count

Signed-off-by: Balazs Toldi <balazs@toldi.eu>

app/build.gradle

@@ -5,12 +5,11 @@ plugins {
 
 android {
     compileSdk 31
-
     defaultConfig {
         applicationId "eu.toldi.balazs.anotherfeedreader"
         minSdk 26
         targetSdk 31
-        versionCode 1
+        versionCode project.getVersionCode()
         versionName "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

build.gradle

@@ -18,4 +18,18 @@ buildscript {
 
 task clean(type: Delete) {
     delete rootProject.buildDir
+}
+
+ext.getVersionCode = { ->
+    try {
+        def stdout = new ByteArrayOutputStream()
+        exec {
+            commandLine 'git', 'rev-list', '--first-parent', '--count', 'origin/main'
+            standardOutput = stdout
+        }
+        return Integer.parseInt(stdout.toString().trim())
+    }
+    catch (ignored) {
+        return -1;
+    }
 }