Move to different versioning scheme and show version in About dialog

Change-Id: I87004c05f9a54d3b2f7854695349e8b506fa7e44

app/build.gradle

@@ -3,6 +3,15 @@ import groovy.xml.XmlUtil
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
+def gitDescribe = { ->
+    def stdout = new ByteArrayOutputStream()
+    exec {
+        commandLine 'git', 'describe', '--always', '--tags', '--dirty=-dirty'
+        standardOutput = stdout
+    }
+    return stdout.toString().trim()
+}
+
 android {
 
     compileSdkVersion 29
@@ -11,6 +20,7 @@ android {
     defaultConfig {
         minSdkVersion 29
         targetSdkVersion 29
+        versionNameSuffix "-$gitDescribe"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         testInstrumentationRunnerArguments disableAnalytics: 'true'
     }

app/src/main/AndroidManifest.xml

@@ -2,8 +2,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     package="com.stevesoltys.seedvault"
-    android:versionCode="7"
+    android:versionCode="29000001"
-    android:versionName="1.0.0">
+    android:versionName="10-1.0.0">
+    <!--
+    The version code is the targeted SDK_VERSION plus 6 digits for our own version code.
+    The version name is the targeted Android version followed by - and our own version name.
+    -->
 
     <uses-permission
         android:name="android.permission.BACKUP"

app/src/main/java/com/stevesoltys/seedvault/settings/AboutDialogFragment.kt

@@ -8,9 +8,14 @@ import android.view.ViewGroup
 import android.widget.TextView
 import androidx.fragment.app.DialogFragment
 import com.stevesoltys.seedvault.R
+import com.stevesoltys.seedvault.transport.backup.PackageService
+import org.koin.android.ext.android.inject
 
 class AboutDialogFragment : DialogFragment() {
 
+    private val packageService: PackageService by inject()
+
+    private lateinit var versionView: TextView
     private lateinit var licenseView: TextView
     private lateinit var authorView: TextView
     private lateinit var designView: TextView
@@ -24,11 +29,15 @@ class AboutDialogFragment : DialogFragment() {
                               savedInstanceState: Bundle?): View? {
         val v: View = inflater.inflate(R.layout.fragment_about, container, false)
 
+        versionView = v.findViewById(R.id.versionView)
         licenseView = v.findViewById(R.id.licenseView)
         authorView = v.findViewById(R.id.authorView)
         designView = v.findViewById(R.id.designView)
         sponsorView = v.findViewById(R.id.sponsorView)
 
+        val versionName = packageService.getVersionName(requireContext().packageName) ?: "???"
+        versionView.text = getString(R.string.about_version, versionName)
+
         return v
     }
 

app/src/main/java/com/stevesoltys/seedvault/transport/backup/PackageService.kt

@@ -112,6 +112,12 @@ internal class PackageService(
             return ExpectedAppTotals(appsTotal, appsOptOut)
         }
 
+    fun getVersionName(packageName: String): String? = try {
+        packageManager.getPackageInfo(packageName, 0).versionName
+    } catch (e: PackageManager.NameNotFoundException) {
+        null
+    }
+
     private fun logPackages(packages: List<String>) {
         packages.chunked(LOG_MAX_PACKAGES).forEach {
             Log.i(TAG, it.toString())

app/src/main/res/layout/fragment_about.xml

@@ -62,6 +62,19 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/appNameView" />
 
+    <TextView
+        android:id="@+id/versionView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="16dp"
+        android:text="@string/about_version"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/summaryView" />
+
     <TextView
         android:id="@+id/licenseView"
         android:layout_width="wrap_content"
@@ -73,7 +86,7 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/summaryView" />
+        app:layout_constraintTop_toBottomOf="@+id/versionView" />
 
     <TextView
         android:id="@+id/authorView"

app/src/main/res/values/strings.xml

@@ -126,6 +126,7 @@
     <!-- About -->
     <string name="about_title">About</string>
     <string name="about_summary">A backup application using Android\'s internal backup API.</string>
+    <string name="about_version">Version: %s</string>
     <string name="about_license">License: <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache2</a></string>
     <string name="about_author">Written by: <a href="https://github.com/stevesoltys">Steve Soltys</a> and <a href="https://blog.grobox.de">Torsten Grote</a></string>
     <string name="about_design">Design by: <a href="https://www.glennsorrentino.com/">Glenn Sorrentino</a></string>