add gitlab ci

.gitlab-ci.yml

@@ -0,0 +1,47 @@
+stages:
+  - prepare
+  - build
+
+default:
+  image: golang:1.25.9-trixie # according to the original ~1.25.7
+
+calculate-version:
+  stage: prepare
+  script:
+    - go run -v ./cmd/internal/read_tag --ci --nightly
+    - echo "version=$version" >> artifact.env
+  artifacts:
+    reports:
+      dotenv: artifact.env
+
+build-android:
+  stage: build
+  before_script: |
+    sudo apt update && sudo apt install -y openjdk-17-jdk-headless
+    /usr/lib/jvm/java-17-openjdk-amd64/bin/java --version
+  script:
+    - bash ./setup-ndk.sh
+    - git submodule update --init --recursive
+    - git ls-remote --exit-code --tags origin v$version || echo "PUBLISHED=false" >> "$GITHUB_ENV"
+    - git tag v$version -f
+    - make lib_install
+    - export PATH="$PATH:$(go env GOPATH)/bin"
+    - make lib_android
+    - cd clients/android && git checkout dev && cd ../..
+    - go run -v ./cmd/internal/update_android_version --ci --nightly
+    - mkdir clients/android/app/libs # start building
+    - cp *.aar clients/android/app/libs
+    - cd clients/android
+    - ./gradlew :app:assembleOtherRelease :app:assembleOtherLegacyRelease
+    - cd ../..
+    - mkdir -p dist # prepare upload
+    - cp clients/android/app/build/outputs/apk/other/release/*.apk dist
+    - cp clients/android/app/build/outputs/apk/otherLegacy/release/*.apk dist
+    - VERSION_CODE=$(grep VERSION_CODE clients/android/version.properties | cut -d= -f2)
+    - VERSION_NAME=$(grep VERSION_NAME clients/android/version.properties | cut -d= -f2)
+  variables:
+    ANDROID_NDK_VERSION: r28
+    LOCAL_PROPERTIES: "S0VZU1RPUkVfUEFTUz0xMTQ1MTQKQUxJQVNfTkFNRT1hbGlhcwpBTElBU19QQVNTPTExNDUxNAo="
+  artifacts:
+    paths:
+      - "./dist"