Meta: Generate APK Files on GitHub Actions (#12)

---------

Co-authored-by: Mahiro Saeki a.k.a. Nejikugi <63852665+scrwnl@users.noreply.github.com>

Author: m-tsuru

.github/workflows/android.yml

@@ -0,0 +1,44 @@
+name: build release apk
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Get version from tag
+        id: get_version
+        run: |
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          else
+            VERSION=$(git describe --tags --always --dirty)
+          fi
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "Version: $VERSION"
+      - name: set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: gradle
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+      - name: build Release
+        run: ./gradlew assembleRelease
+      - name: Create Release
+        uses: svenstaro/upload-release-action@v2
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: app/build/outputs/apk/release/app-release.apk
+          asset_name: yuredroid-${{ steps.get_version.outputs.version }}.apk
+          tag: ${{ github.ref }}
+          overwrite: true
+          body: "Yure Android Client ${{ steps.get_version.outputs.version }}"

app/build.gradle.kts

@@ -4,6 +4,25 @@ plugins {
     alias(libs.plugins.kotlin.compose)
 }
 
+fun getGitVersion(): String {
+    return try {
+        val process = Runtime.getRuntime().exec("git describe --tags --always --dirty")
+        val version = process.inputStream.bufferedReader().readText().trim()
+        if (version.startsWith("v")) version.substring(1) else version
+    } catch (e: Exception) {
+        "1.0.0-beta" // Fallback version
+    }
+}
+
+fun getVersionCode(): Int {
+    return try {
+        val process = Runtime.getRuntime().exec("git rev-list --count HEAD")
+        process.inputStream.bufferedReader().readText().trim().toInt()
+    } catch (e: Exception) {
+        1 // Fallback version code
+    }
+}
+
 android {
     namespace = "com.sasakulab.yure_android_client"
     compileSdk {
@@ -14,8 +33,8 @@ android {
         applicationId = "com.sasakulab.yure_android_client"
         minSdk = 26
         targetSdk = 36
-        versionCode = 1
-        versionName = "1.2.0"
+        versionCode = getVersionCode()
+        versionName = getGitVersion()
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }