Add version management with auto-bump script

Version is tracked in version.properties and read by build.gradle.kts.
Run ./bump-version.sh [major|minor|patch] before release builds.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/build.gradle.kts

@@ -14,6 +14,15 @@ val keystoreProperties = Properties().apply {
     }
 }
 
+// Load version from version.properties
+val versionProperties = Properties().apply {
+    load(rootProject.file("version.properties").inputStream())
+}
+val vMajor = versionProperties["versionMajor"].toString().toInt()
+val vMinor = versionProperties["versionMinor"].toString().toInt()
+val vPatch = versionProperties["versionPatch"].toString().toInt()
+val vCode = versionProperties["versionCode"].toString().toInt()
+
 android {
     namespace = "no.naiv.tiltshift"
     compileSdk = 35
@@ -34,8 +43,8 @@ android {
         applicationId = "no.naiv.tiltshift"
         minSdk = 35
         targetSdk = 35
-        versionCode = 1
-        versionName = "1.0.0"
+        versionCode = vCode
+        versionName = "$vMajor.$vMinor.$vPatch"
 
         vectorDrawables {
             useSupportLibrary = true

bump-version.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# Bumps the version in version.properties before a release build.
+# Usage: ./bump-version.sh [major|minor|patch]
+# Default: patch
+
+set -euo pipefail
+
+PROPS_FILE="$(dirname "$0")/version.properties"
+
+if [[ ! -f "$PROPS_FILE" ]]; then
+    echo "Error: $PROPS_FILE not found" >&2
+    exit 1
+fi
+
+# Read current values
+major=$(grep '^versionMajor=' "$PROPS_FILE" | cut -d= -f2)
+minor=$(grep '^versionMinor=' "$PROPS_FILE" | cut -d= -f2)
+patch=$(grep '^versionPatch=' "$PROPS_FILE" | cut -d= -f2)
+code=$(grep '^versionCode=' "$PROPS_FILE" | cut -d= -f2)
+
+bump_type="${1:-patch}"
+
+case "$bump_type" in
+    major)
+        major=$((major + 1))
+        minor=0
+        patch=0
+        ;;
+    minor)
+        minor=$((minor + 1))
+        patch=0
+        ;;
+    patch)
+        patch=$((patch + 1))
+        ;;
+    *)
+        echo "Usage: $0 [major|minor|patch]" >&2
+        exit 1
+        ;;
+esac
+
+code=$((code + 1))
+
+# Write updated values
+cat > "$PROPS_FILE" << EOF
+versionMajor=$major
+versionMinor=$minor
+versionPatch=$patch
+versionCode=$code
+EOF
+
+echo "$major.$minor.$patch (versionCode=$code)"

version.properties

@@ -0,0 +1,4 @@
+versionMajor=1
+versionMinor=1
+versionPatch=0
+versionCode=2