Automatic version code (#115)

Co-authored-by: niqdev <niqdev@users.noreply.github.com>

app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.github.niqdev.ipcam"
         minSdkVersion 16
         targetSdkVersion 28
-        versionCode 12
-        versionName "1.9.0"
+        versionCode getGitCommitCount()
+        versionName getTag()
     }
 
     buildTypes {

build.gradle

@@ -11,7 +11,7 @@ buildscript {
 
 allprojects {
     group = 'com.github.niqdev'
-    version = '1.7.0'
+    version = getTag()
 
     repositories {
         google()
@@ -22,3 +22,21 @@ allprojects {
 task clean(type: Delete) {
     delete rootProject.buildDir
 }
+
+@SuppressWarnings("unused")
+static def getGitCommitCount() {
+    def process = "git rev-list HEAD --count".execute()
+    return process.text.toInteger()
+}
+
+@SuppressWarnings("unused")
+static def getTag() {
+    // with local un-commited changes a -DIRTY is added
+    def processChanges = "git diff-index --name-only HEAD --".execute()
+    def dirty = ""
+    if (!processChanges.text.toString().trim().isEmpty())
+        dirty = "-DIRTY"
+
+    def process = "git describe --tags".execute()
+    return process.text.toString().trim() + dirty
+}

mjpeg-view/build.gradle

@@ -6,8 +6,7 @@ android {
     defaultConfig {
         minSdkVersion 16
         targetSdkVersion 28
-        versionCode 1
-        versionName project.version
+        versionName getTag()
     }
 
     compileOptions {