Run Android builds on the new server Linux runner

.gitea/workflows/android.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   android:
-    runs-on: windows-latest
+    runs-on: ubuntu-24.04
     timeout-minutes: 40
     steps:
       - uses: actions/checkout@v4
@@ -19,18 +19,26 @@ jobs:
           distribution: temurin
           java-version: '21'
       - name: Set up Android SDK
-        shell: powershell
-        run: ./scripts/setup-android-ci.ps1
+        shell: bash
+        run: bash scripts/setup-android-ci.sh
       - name: Test and build exact commit
-        shell: powershell
+        shell: bash
         run: |
-          $ErrorActionPreference = 'Stop'
-          if ((git rev-parse HEAD).Trim() -ne $env:GITHUB_SHA) { throw 'Checkout SHA mismatch' }
-          Get-CimInstance Win32_OperatingSystem | Select-Object TotalVisibleMemorySize, FreePhysicalMemory
-          # A fresh runner compiles both variants from scratch. Keep their compiler
-          # heaps separate in time; the previous shared 2 GiB heap exhausted itself.
-          $buildArgs = @('--no-daemon', '--console=plain', '--max-workers=1', '-Pkotlin.daemon.jvmargs=-Xmx4096m')
-          .\gradlew.bat testDebugUnitTest assembleDebug @buildArgs
-          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-          .\gradlew.bat compileReleaseKotlin @buildArgs
-          exit $LASTEXITCODE
+          set -euo pipefail
+          test "$(git rev-parse HEAD)" = "$GITHUB_SHA"
+          uname -a
+          free -m
+          # One compiler process inside the server's bounded, serial CI runner.
+          build_args=(--no-daemon --console=plain --max-workers=1
+            '-Dorg.gradle.jvmargs=-Xmx2560m -Dfile.encoding=UTF-8'
+            '-Pkotlin.compiler.execution.strategy=in-process')
+          bash gradlew testDebugUnitTest assembleDebug "${build_args[@]}"
+          bash gradlew compileReleaseKotlin "${build_args[@]}"
+      - name: Keep exact-commit APK and test reports
+        uses: actions/upload-artifact@v3
+        with:
+          name: aiturk-android-${{ github.sha }}
+          if-no-files-found: error
+          path: |
+            app/build/outputs/apk/debug/app-debug.apk
+            app/build/reports/tests/testDebugUnitTest

scripts/setup-android-ci.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Linux CI on the TurkServis server; no workstation Android installation required.
+set -euo pipefail
+sdk_root="${RUNNER_TEMP:?}/android-sdk"
+archive="${RUNNER_TEMP}/commandlinetools-linux-16111833.zip"
+mkdir -p "$sdk_root/cmdline-tools" "$sdk_root/licenses"
+curl --fail --location --retry 3 --max-time 300 \
+  https://dl.google.com/android/repository/commandlinetools-linux-16111833_latest.zip -o "$archive"
+# Official checksum from Google's repository2-3.xml, cmdline-tools;latest, linux.
+printf '%s  %s\n' e025545c62a8e64c7559119566a569fb1dec5f60 "$archive" | sha1sum -c -
+unzip -q "$archive" -d "$sdk_root/cmdline-tools"
+mv "$sdk_root/cmdline-tools/cmdline-tools" "$sdk_root/cmdline-tools/latest"
+cp scripts/android-licenses/android-sdk-license "$sdk_root/licenses/"
+"$sdk_root/cmdline-tools/latest/bin/sdkmanager" --sdk_root="$sdk_root" \
+  'platform-tools' 'platforms;android-37.0' 'build-tools;37.0.0'
+test -f "$sdk_root/platforms/android-37.0/android.jar"
+test -x "$sdk_root/build-tools/37.0.0/aapt2"
+printf 'ANDROID_HOME=%s\nANDROID_SDK_ROOT=%s\n' "$sdk_root" "$sdk_root" >> "$GITHUB_ENV"