Refactor the build system

The 2.1.55 desktop release switched away from Bazel to a new build system,
which required some changes to this repo. Making the changes was a bit complicated
due to the complexity of the current build system, and I ended up shaving some yaks
to make things simpler while I was working on the changes.

Changes:

- Building for the current architecture instead of all architectures is now the
default, so getting started is easier, and a build in Android Studio no longer
requires special flags.
- The build-current.sh script has been split into build-aar and build-robo
for the Android and Robolectric parts, and can be used for both single-arch
and multi-arch builds.
- On arm64 Macs, the build scripts now create arm binaries
- In a multi-arch build, both x86 and arm64 Mac libs are built, and they're
merged into a single library. This can be done in CI, so there is no manual step
required for M1 machines anymore.
- The build now uses protobuf and python binaries/libs that the desktop build
downloads, so they don't need to be installed separately.
- The pinned Rust version and Rust targets are automatically installed as
required.
- The per-platform CI builds now build in debug mode and are faster.
- Updated the docs to explain how the NDK can be installed via Android Studio,
instead of via separate command-line tools.
- The cross/docker stuff has been stripped out, as it's of limited use as it
can't target macOS legally. Easier to use GH actions for the multi-arch
builds, and keep things simple for local development.
- Fix lint not being run in CI; caught an API 23 reference.

Bumps ankidroid#179 (builds on M1 already work, so this may be simpler than expected?)
Bumps ankidroid#174 (a bunch of the doctor stuff is obsolete; updated HOWTO.md and GH actions should be consulted)
Bumps ankidroid#27 (I recommend closing this; single-platform is the default for local builds, and
CI runners don't have any extra compute available)

Tentatively closes ankidroid#109 (didn't see the flake when I was updating the actions)

Closes ankidroid#235 (translation submodules now automatically synced with anki submodule)
Closes ankidroid#213 (path based on script now)
Closes ankidroid#211 (builds for Arm Mac on Arm Macs)
Closes ankidroid#197 (single arch is the default)
Closes ankidroid#196 (desktop venv is used)
Closes ankidroid#195 (can be done via the GUI, and does not require separate cli download)
Closes ankidroid#168 (latest Rust; easier changing via rust-toolchain.toml)
Closes ankidroid#164 (universal dylib)
Closes ankidroid#127 (no docker)
Closes ankidroid#106 (most of those scripts obsolete; some commands moved into build scripts)
Closes ankidroid#99 (no docker)
Closes ankidroid#98 (no docker)
Closes ankidroid#97 (submodule automatically updated)
Closes ankidroid#96 (build will fail if commit unavailable)
Closes ankidroid#53 (no docker)
Closes ankidroid#40 (DEBUG=1 option documented)
Closes ankidroid#9 (simpler OOTB experience, and updated docs)

Author: dae

.cargo/config.toml

@@ -1,3 +1,7 @@
+[build]
+# override any global customizations, as the gradle plugin requires a specific path
+target-dir = "target"
+
 [env]
 STRINGS_JSON = { value = "anki/out/strings.json", relative = true }
 PROTOC = { value = "anki/out/extracted/protoc/bin/protoc", relative = true }

.github/scripts/install_rust_robolectric_targets.sh

@@ -0,0 +1,134 @@
+name: Build AAR and Robo (all platforms)
+on:
+  workflow_dispatch:
+  push:
+  schedule:
+    - cron: "0 0 * * *"
+  pull_request:
+
+env:
+  ALL_ARCHS: 1
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-release
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: macos-latest
+    timeout-minutes: 80
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Fetch submodules
+        run: git submodule update --init
+
+      - name: Setup Ninja
+        uses: ashutoshvarma/setup-ninja@master
+        with:
+          version: 1.10.0
+
+      # The action puts a relative path on the PATH 🙄
+      - name: Make path absolute
+        run: echo $(pwd)/ninja_bin >> $GITHUB_PATH
+
+      - name: Configure JDK 1.11
+        uses: actions/setup-java@v3
+        with:
+          distribution: "adopt"
+          java-version: "11" # minimum for Android API31
+
+      - name: Install Android Command Line Tools
+        uses: android-actions/setup-android@v2
+
+      - name: Install Windows cross compiler
+        run: brew install mingw-w64 && x86_64-w64-mingw32-gcc -v
+
+      - name: Install Linux cross compiler
+        run: |
+          brew tap SergioBenitez/osxct
+          brew install x86_64-unknown-linux-gnu
+          x86_64-unknown-linux-gnu-gcc -v
+
+      - name: Install NDK
+        run: .github/scripts/install_ndk.sh 22.0.7026061
+
+      - name: Rust Cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-rust-release-v2-${{ hashFiles('rslib-bridge/**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-rust-release-v2
+            ${{ runner.os }}-rust
+
+      - name: Anki cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            anki/out/node_modules
+            anki/out/rust
+            anki/out/extracted
+          key: ${{ runner.os }}-anki-v4-${{ hashFiles('anki/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-anki-v4
+
+      - name: Build Android/All
+        run: ./build-aar.sh
+
+      - name: Build Robolectric/All
+        run: ./build-robo.sh
+
+      - name: Check Compiled Libraries
+        run: >
+          cd rsdroid-testing/assets &&
+          ../../.github/scripts/check_robolectric_assets.sh
+
+      - name: Upload rsdroid AAR as artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: rsdroid-aar
+          if-no-files-found: error
+          path: rsdroid/build/outputs/aar
+
+      - name: Upload rsdroid-robo JAR as artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: rsdroid-robo
+          if-no-files-found: error
+          path: rsdroid-testing/build/libs
+
+      # following steps only run on workflow dispatch
+
+      - name: Publish AAR to Maven
+        if: github.event_name == "workflow_dispatch"
+        env:
+          ORG_GRADLE_PROJECT_SIGNING_PRIVATE_KEY: ${{ secrets.SIGNING_PRIVATE_KEY }}
+          ORG_GRADLE_PROJECT_SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+          SONATYPE_NEXUS_USERNAME: david-allison-1
+          SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+        run: |
+          ./gradlew rsdroid:uploadArchives -DtestBuildType=release -Dorg.gradle.daemon=false -Dorg.gradle.console=plain
+
+      - name: Publish JAR to Maven
+        if: github.event_name == "workflow_dispatch"
+        env:
+          ORG_GRADLE_PROJECT_SIGNING_PRIVATE_KEY: ${{ secrets.SIGNING_PRIVATE_KEY }}
+          ORG_GRADLE_PROJECT_SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+          SONATYPE_NEXUS_USERNAME: david-allison-1
+          SONATYPE_NEXUS_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}
+        run: |
+          export ANKIDROID_LINUX_CC=x86_64-unknown-linux-gnu-gcc
+          export ANKIDROID_MACOS_CC=cc
+          export RUST_DEBUG=1
+          export RUST_BACKTRACE=1
+          export RUST_LOG=trace
+          export NO_CROSS=true
+          ./gradlew rsdroid-testing:uploadArchives -Dorg.gradle.project.macCC=$ANKIDROID_MACOS_CC -DtestBuildType=debug -Dorg.gradle.daemon=false -Dorg.gradle.console=plain
+
+      - name: ℹ️Additional Release Instructions (requires human interaction)
+        if: github.event_name == "workflow_dispatch"
+        run: echo "Sign in to https://oss.sonatype.org/#stagingRepositories , close the repository, then release it"