thoughtsync/.forgejo/workflows/android.yml

name: Android

# The native Kotlin/Compose client over the shared Rust core (M12).
#
# Replaces the Tauri-mobile lane deleted in step 2. What changed is what this
# builds, not that Android has a lane: the UI is Compose, and the store and sync
# engine are `thoughtsync-core` cross-compiled by cargo-ndk and loaded through
# uniffi.
#
# CI can only prove this BUILDS. A Linux runner cannot execute an APK, so anything
# about feel, touch or on-device correctness is an operator pass on an emulator or
# phone.
#
# The artifact is a SIGNED RELEASE APK when the keystore secret is present, and an
# unsigned debug one when it is not. That distinction is not cosmetic: two builds
# signed with different keys cannot replace one another, and bridging that gap
# means uninstalling first — which deletes the app's database and every local note
# with it (Scribe issue 2803).

on:
  push:
    branches: [dev, main]
    paths:
      - "android/**"
      # The Rust the .so is built from. A core change reaches the phone exactly
      # as it reaches the desktop, so this lane has to rebuild on it.
      - "core/**"
      - "Cargo.toml"
      - "Cargo.lock"
      - ".forgejo/workflows/android.yml"
  workflow_dispatch:

concurrency:
  group: android-${{ github.ref }}
  cancel-in-progress: true

env:
  # Silences the JDK 22+ "restricted method in java.lang.System has been called"
  # warning that Gradle 9.1's bundled native-platform jar trips at launch. This
  # targets the LAUNCHER JVM, which is why org.gradle.jvmargs in
  # gradle.properties is not enough on its own (Minstrel hit the same thing).
  JAVA_TOOL_OPTIONS: "--enable-native-access=ALL-UNNAMED"

jobs:
  build:
    name: Kotlin + Rust (APK)
    # runs-on is only a scheduling label (Label Model B). flutter-ci is the
    # proven-working label that can pull our container images.
    runs-on: flutter-ci
    container:
      # The image repurposed from ci-tauri-android in M12 step 3: Rust + the four
      # Android ABIs + cargo-ndk + SDK/NDK + JDK 25 + ktlint + detekt.
      image: git.fabledsword.com/bvandeusen/ci-rust-android:1.97

    defaults:
      run:
        working-directory: android

    steps:
      - uses: actions/checkout@v4

      - name: Cache Gradle and Cargo
        uses: actions/cache@v4
        with:
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
            ~/.kotlin
            target
          key: android-${{ hashFiles('android/gradle/wrapper/gradle-wrapper.properties', 'android/gradle/libs.versions.toml', 'android/**/*.gradle.kts', 'Cargo.lock') }}
          restore-keys: |
            android-

      # Everything downstream keys off this: the variant to build, the Cargo
      # profile to build it with, and the version it carries. Decided once so no
      # two Gradle invocations in this run can disagree and force a second
      # four-minute cross-compile.
      - name: Signing key, variant and version
        id: build
        env:
          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
        run: |
          version="$(sh ../desktop/packaging/build-version.sh)"
          echo "name=$version" >> $GITHUB_OUTPUT
          # versionCode must RISE for Android to accept an update, and the run
          # number is the same monotonic counter the desktop's version scheme
          # already uses — no state carried between runs, and immune to the
          # shallow checkout that makes a commit count useless here.
          echo "code=$GITHUB_RUN_NUMBER" >> $GITHUB_OUTPUT

          if [ -n "${ANDROID_KEYSTORE_BASE64:-}" ]; then
            printf '%s' "$ANDROID_KEYSTORE_BASE64" | base64 -d > /tmp/thoughtsync-release.jks
            echo "variant=Release" >> $GITHUB_OUTPUT
            echo "profile=release" >> $GITHUB_OUTPUT
            echo "keystore=/tmp/thoughtsync-release.jks" >> $GITHUB_OUTPUT
            echo "apk=android/app/build/outputs/apk/release/app-release.apk" >> $GITHUB_OUTPUT
            echo "Signed release build — $version (versionCode $GITHUB_RUN_NUMBER)"
          else
            echo "::warning::No ANDROID_KEYSTORE_BASE64 secret. Building an UNSIGNED DEBUG APK: it cannot be installed over a signed build and cannot self-update."
            echo "variant=Debug" >> $GITHUB_OUTPUT
            echo "profile=debug" >> $GITHUB_OUTPUT
            echo "keystore=" >> $GITHUB_OUTPUT
            echo "apk=android/app/build/outputs/apk/debug/app-debug.apk" >> $GITHUB_OUTPUT
          fi

      - name: Make gradlew executable
        run: chmod +x ./gradlew

      # Fails loudly here if the wrapper and the image's JDK disagree, rather
      # than thirty seconds into a compile with an opaque version message.
      - name: Gradle wrapper check
        run: ./gradlew --version

      # Cross-compiles the core for four ABIs and generates the Kotlin bindings
      # from the built .so. Run as its own step so a Rust failure is legible as a
      # Rust failure instead of arriving inside a Gradle stack trace.
      - name: Build the native library and bindings
        run: ./gradlew generateUniffiBindings -PTHOUGHTSYNC_CARGO_PROFILE=${{ steps.build.outputs.profile }}

      # The image's PINNED CLIs, not Gradle plugins. ci-rust-android carries both
      # (M12 step 3) precisely so this lane needs no second image, and going
      # through Gradle plugins would mean a second version of each tool resolved
      # at build time and kept in lockstep with the image's by hand.
      #
      # Scoped to src/main: the generated uniffi bindings live under build/ and
      # are not ours to style.
      - name: ktlint
        run: ktlint "app/src/main/**/*.kt"

      - name: detekt
        run: detekt --build-upon-default-config --config config/detekt.yml --input app/src/main/java

      - name: Unit tests
        # Host-JVM tests only. Anything touching the core needs an Android
        # runtime to load the .so, so those are instrumented tests and belong on
        # an emulator, not here — the Rust side is covered by the workspace
        # tests in the desktop lane.
        run: ./gradlew test${{ steps.build.outputs.variant }}UnitTest -PTHOUGHTSYNC_CARGO_PROFILE=${{ steps.build.outputs.profile }}

      - name: Assemble the APK
        env:
          # Empty on the unsigned path, which build.gradle.kts reads as "no
          # signing config" rather than as a path to a missing file.
          ANDROID_KEYSTORE_FILE: ${{ steps.build.outputs.keystore }}
          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
        run: |
          ./gradlew assemble${{ steps.build.outputs.variant }} \
            -PTHOUGHTSYNC_CARGO_PROFILE=${{ steps.build.outputs.profile }} \
            -PTHOUGHTSYNC_VERSION_NAME=${{ steps.build.outputs.name }} \
            -PTHOUGHTSYNC_VERSION_CODE=${{ steps.build.outputs.code }}

      # Prints the certificate the APK was actually signed with, so the operator
      # can compare it against the fingerprint recorded when the key was
      # generated. Signing with the WRONG key produces a perfectly valid APK that
      # simply refuses to install over the app already on the phone — a failure
      # that otherwise only shows up on the device, after the run is green.
      - name: Show the signing certificate
        if: steps.build.outputs.keystore != ''
        run: |
          apksigner="$(ls /opt/android-sdk/build-tools/*/apksigner | head -1)"
          "$apksigner" verify --print-certs "app/build/outputs/apk/release/app-release.apk"

      - name: Upload the APK
        # Mirrored action, never actions/upload-artifact. @v4+ throws
        # GHESNotSupportedError client-side on this hostname, and @v3 is worse —
        # it reports success while Gitea serves artifacts back only through the
        # v4 API, so the upload is stored and invisible. Pinned by SHA because
        # the mirror auto-syncs; full URL because DEFAULT_ACTIONS_URL sends bare
        # owner/repo to github.com. See Scribe issues 2255 / 2270.
        uses: https://git.fabledsword.com/bvandeusen/upload-artifact@cb8afe72b42edc798abfb8fcb556cf660d894245
        with:
          name: thoughtsync-android-${{ steps.build.outputs.profile }}-${{ github.sha }}
          path: ${{ steps.build.outputs.apk }}
          if-no-files-found: error