LibreMediaConverter/.github/workflows/status_check.yml

name: Status check

on:
  pull_request:
    branches: [main]

# A newer push to the same PR makes the in-flight run obsolete. An emulator matrix is
# expensive, so cancel rather than let runs pile up.
concurrency:
  group: status-check-${{ github.ref }}
  cancel-in-progress: true

# Third-party actions are pinned to a commit rather than a tag. A tag is mutable: the
# owner can repoint v4 at new code, so a tag reference is an open invitation to run
# whatever that repository contains tomorrow. The trailing comment records which
# release each hash corresponds to, since a bare hash is unreadable.
# Nothing here writes: these jobs read the code, build it and attach reports. Declared
# explicitly rather than inherited from the repository default, for the same reason the
# action SHAs above are pinned -- the token's reach should be readable here, and a default
# that widens later should not silently widen these jobs with it. build.yml's release job
# makes the opposite declaration for the same reason.
permissions:
  contents: read

env:
  GRADLE_CACHE_PATHS: |
    ~/.gradle/caches
    ~/.gradle/wrapper

jobs:
  # ---------------------------------------------------------------------------
  # Validates the committed FFmpeg archive. It does not build anything: the whole
  # point of checking the binary in is that a red run means broken code rather than
  # a cross-compile that hiccuped.
  #
  # Its own job so a bad archive reports once, clearly, instead of surfacing as five
  # confusing emulator failures. It takes seconds, so gating the matrix on it costs
  # almost nothing.
  # ---------------------------------------------------------------------------
  ffmpeg:
    name: FFmpeg binary
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - name: Verify the committed archive
        run: |
          AAR=bin/ffmpeg-kit-next-8.1.1.aar
          test -f "$AAR" || { echo "::error::$AAR is missing"; exit 1; }

          # A truncated file, or a Git LFS pointer checked out without LFS, would pass
          # a file-exists check and then surface much later as a confusing linker
          # error. Assert the archive actually carries native libraries for both ABIs.
          for abi in arm64-v8a x86_64; do
            n=$(unzip -l "$AAR" | grep -c "jni/$abi/.*\.so$" || true)
            echo "  $abi: $n shared libraries"
            test "$n" -gt 0 || { echo "::error::AAR has no $abi libraries"; exit 1; }
          done

          # 16 KB alignment is a Play requirement and is easy to lose in a rebuild,
          # so it is checked here rather than discovered at submission.
          unzip -q -o "$AAR" 'jni/*' -d /tmp/aarcheck
          bad=0
          for f in /tmp/aarcheck/jni/*/*.so; do
            align=$(readelf -lW "$f" | awk '$1=="LOAD"{print $NF}' | sort -u)
            if [ "$align" != "0x4000" ]; then
              echo "::error::$(basename "$f") is $align, not 16 KB aligned"; bad=1
            fi
          done
          test "$bad" -eq 0 || exit 1
          echo "  all libraries are 16 KB aligned"

          # Record what shipped, so a failing run elsewhere can be tied to a version.
          echo "  sha256: $(sha256sum "$AAR" | cut -d' ' -f1)"

  # ---------------------------------------------------------------------------
  # JVM tests: the routing matrix, the FFmpeg argument builder, the concat planner
  # and the retry rule. No device needed, so this is the fastest signal on a PR.
  # ---------------------------------------------------------------------------
  unit:
    name: Unit tests
    runs-on: ubuntu-latest
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
        with:
          distribution: temurin
          java-version: '25'   # Matches the daemon JVM pinned in gradle/gradle-daemon-jvm.properties

      # Gradle is invoked through the committed wrapper rather than a setup action.
      # The wrapper verifies its own distribution against distributionSha256Sum, and
      # caching is a handful of lines, so the action earned little here.
      - uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: ${{ env.GRADLE_CACHE_PATHS }}
          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle.kts', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
          restore-keys: gradle-${{ runner.os }}-

      - name: Unit tests
        run: ./gradlew :app:testDebugUnitTest

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: unit-test-report
          path: app/build/reports/tests/

      # Reported, not gated. A coverage floor is only meaningful against a measured
      # baseline, and this is the thing that measures it -- currently 31% of lines. Once
      # that number has settled, a jacocoTestCoverageVerification task can hold it.
      - name: Coverage report
        run: ./gradlew :app:jacocoTestReport

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: coverage-report
          path: app/build/reports/jacoco/jacocoTestReport/

  # ---------------------------------------------------------------------------
  # Three tools, one job, because they answer three different questions and a
  # developer wants all three answers at once rather than one per push.
  #
  #   ktlint  -- formatting. Owns it outright; detekt's formatting ruleset is off,
  #              so the two can never disagree about the same line.
  #   detekt  -- static analysis. Its config lives in config/detekt/detekt.yml and
  #              overrides only the rules this codebase legitimately breaks.
  #   lint    -- the Android-specific things neither of the others can see: opt-in
  #              markers, API-level misuse, manifest and resource problems.
  #
  # --continue is what makes it one round trip: a ktlint failure still lets detekt
  # and lint report, so a red run hands over the whole list rather than the first
  # item on it.
  #
  # No emulator and no FFmpeg archive needed, so this is the cheapest gate here and
  # deliberately does not depend on the ffmpeg job.
  # ---------------------------------------------------------------------------
  static-analysis:
    name: Static analysis
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
        with:
          distribution: temurin
          java-version: '25'

      - uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: ${{ env.GRADLE_CACHE_PATHS }}
          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle.kts', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
          restore-keys: gradle-${{ runner.os }}-

      - name: ktlint, detekt and Android lint
        run: ./gradlew :app:ktlintCheck :app:detekt :app:lintDebug --continue --stacktrace

      # The XML matters as much as the HTML: it is the one that can be diffed between
      # runs to see what a change actually moved.
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: static-analysis-reports
          path: |
            app/build/reports/ktlint/
            app/build/reports/detekt/
            app/build/reports/lint-results-debug.html
            app/build/reports/lint-results-debug.xml

  # ---------------------------------------------------------------------------
  # One runner per API level, across the whole supported range.
  #
  # The range is the point: minSdk is 33, and the foreground service type differs
  # across it -- none below 34, dataSync at 34, mediaProcessing from 35. Testing a
  # single level would leave two thirds of that branch unexercised.
  #
  # It reaches targetSdk 37, but the API 37 row is not like the other four and the
  # comment on it says how. Two tests are excluded there and run in their own
  # advisory job below. See docs/api-37-emulator-crash.md.
  #
  # FFmpeg is not built here. The AAR is committed under bin/, so a red run means the
  # code is broken rather than that a cross-compile hiccuped.
  # ---------------------------------------------------------------------------
  e2e:
    name: E2E API ${{ matrix.label }}
    runs-on: ubuntu-latest
    needs: ffmpeg
    timeout-minutes: 60
    strategy:
      # Report every API level rather than stopping at the first red one. Knowing
      # whether a failure is universal or specific to one level is most of the
      # diagnosis.
      fail-fast: false
      matrix:
        include:
          - label: "33"
            api-level: "33"
          - label: "34"
            api-level: "34"
          - label: "35"
            api-level: "35"
          - label: "36"
            api-level: "36"
          # API 37, and it is NOT the same device as the four rows above it.
          #
          # CAVEAT, read this before trusting a green here: this leg runs with
          # SystemUI disabled and the framework restarted under it. No other leg
          # and no Pixel run uses that configuration. It is defensible only because
          # nothing in this suite touches system UI -- these are Media3, FFmpeg and
          # WorkManager tests -- and because the alternative is no CI coverage of
          # the level this app targets. **Anything that ever does depend on system
          # UI must not trust this row.** E2E_DISABLE_SYSTEM_UI is what does it;
          # .github/scripts/e2e-run.sh explains the mechanism and why every step of
          # it is verified rather than assumed.
          #
          # api-level must be "37.0". A bare 37 is not an SDK package and fails
          # during setup, which cost a run to discover.
          #
          # notAnnotation removes the two tests that do not pass on this image; they
          # run in the advisory job below, off the same marker so they cannot end up
          # in both or neither. docs/api-37-emulator-crash.md has the measurements.
          - label: "37"
            api-level: "37.0"
            disable-system-ui: "1"
            gradle-args: "-Pandroid.testInstrumentationRunnerArguments.notAnnotation=org.libremediaconverter.FailsOnEmulatorApi37"
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
        with:
          distribution: temurin
          java-version: '25'

      - uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: ${{ env.GRADLE_CACHE_PATHS }}
          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle.kts', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
          restore-keys: gradle-${{ runner.os }}-

      # Without this the emulator falls back to software rendering and takes minutes
      # longer to boot, when it boots at all.
      - name: Enable KVM
        run: |
          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' \
            | sudo tee /etc/udev/rules.d/99-kvm4all.rules
          sudo udevadm control --reload-rules
          sudo udevadm trigger --name-match=kvm

      - name: Instrumented tests
        uses: reactivecircus/android-emulator-runner@a421e43855164a8197daf9d8d40fe71c6996bb0d # v2.38.0
        # Both of these are empty on every row but 37, and both are read with a
        # `:-` default in e2e-run.sh, so the four legs below 37 run the identical
        # gradle command they always have.
        env:
          E2E_DISABLE_SYSTEM_UI: ${{ matrix.disable-system-ui }}
          E2E_EXTRA_GRADLE_ARGS: ${{ matrix.gradle-args }}
        with:
          api-level: ${{ matrix.api-level }}
          target: google_apis
          arch: x86_64
          profile: pixel_6
          # swiftshader_indirect is correct here only because runners have no GPU to
          # pass through. On a workstation the same setting routes through
          # SwiftShader's JIT, which is a known crash source.
          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
          disable-animations: true
          # The default userdata partition is not big enough for this APK once the
          # FFmpeg libraries are in it. One level failed outright with "Requested
          # internal only, but not enough space", and the margin was thin everywhere
          # else, so give them all room.
          disk-size: 8G
          # Pinned because the emulator's own default is not uniform: it raises an
          # undersized guest to a floor that varies by API level -- 2048M at 33, 2560M
          # at 34 through 36 -- and skips levels it does not recognise entirely. 2560M
          # is the highest of those floors, so no level gets less memory than it
          # already had, and none of them depend on that heuristic any more.
          ram-size: 2560M
          # Build only the ABI the emulator can execute. FFmpeg's native libraries
          # dominate the APK, so shipping arm64 to an x86_64 emulator doubles the
          # install for code that can never run: 114 MB against 80 MB.
          #
          # Diagnostics live in .github/scripts/e2e-run.sh, not here. This action splits
          # `script` on newlines and runs each line as its own `sh -c`, so a handler written
          # inline has to fit on ONE line -- which is how the previous version ended up as an
          # unreadable chain of semicolons. One line invokes the script; the script can use
          # functions, and captures a hang as well as a failure. See its header.
          script: bash .github/scripts/e2e-run.sh ${{ matrix.label }}

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: e2e-report-api${{ matrix.label }}
          path: |
            app/build/reports/androidTests/
            app/build/outputs/androidTest-results/
          if-no-files-found: warn

      # The streamed logcat and the failure dump. Uploaded always, because a leg that goes red
      # once and green on re-run is exactly the one worth reading afterwards, and by then the
      # emulator is long gone.
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: e2e-diagnostics-api${{ matrix.label }}
          path: |
            ${{ runner.temp }}/logcat-api${{ matrix.label }}.txt
            ${{ runner.temp }}/diagnostics-api${{ matrix.label }}.txt
          if-no-files-found: warn

      # Only exists when the wrapper timeout tripped, so `ignore` keeps healthy runs quiet
      # instead of warning on every green leg.
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: e2e-wedge-api${{ matrix.label }}
          path: ${{ runner.temp }}/wedge-diagnostics-api${{ matrix.label }}.txt
          if-no-files-found: ignore

  # ---------------------------------------------------------------------------
  # The two API 37 tests the gating row above excludes, run on their own so they
  # stay visible instead of disappearing behind a notAnnotation.
  #
  # continue-on-error: it reports, it never blocks. That is the whole reason it is
  # a separate job rather than a sixth matrix row: a row would share the gating
  # job's `E2E API <label>` name, and a check cannot be both required and advisory
  # under one name.
  #
  # It is named for WHAT IT RUNS, deliberately. Both tests drive a full H.264 ->
  # H.265 hardware transcode through Media3Engine -- which is exactly what
  # separates them from the two Media3EngineTest cases that pass here, since those
  # two never decode video. The current theory about why they fail is in the next
  # paragraph, where it can be corrected without renaming a check that people have
  # already learned to look for.
  #
  # THEORY, NOT SETTLED: the exception surfaces at `dequeueOutputBuffer` on
  # `c2.goldfish.h264.decoder`, the emulator's own codec, which gets its frames out
  # of a host-side colour buffer -- the same readback machinery that aborts
  # surfaceflinger on this image. What is MEASURED is narrower: these two fail on
  # the API 37 emulator image; pass at API 36 on this runner under the same renderer
  # AND the same SystemUI-disable path; pass at API 33-36 without that path at all,
  # since nothing below 37 needs it; and pass on a physical Pixel 10 Pro XL at 37. That the decoder is the culprit rather than something else
  # the decode path touches is inference. docs/api-37-emulator-crash.md separates
  # the two, and the images also differ on the encoder side, which is why "broken
  # h264 decoder" is not written into this job's name.
  #
  # WHEN THIS GOES GREEN, delete the annotation rather than this job: the gating
  # row picks the tests back up automatically, and this job goes empty and can go
  # with it.
  # ---------------------------------------------------------------------------
  e2e-api37-advisory:
    name: E2E API 37 Media3 hardware transcode (advisory)
    runs-on: ubuntu-latest
    needs: ffmpeg
    timeout-minutes: 60
    continue-on-error: true
    env:
      E2E_LABEL: "37-media3-transcode"
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1

      - uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
        with:
          distribution: temurin
          java-version: '25'

      - uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: ${{ env.GRADLE_CACHE_PATHS }}
          key: gradle-${{ runner.os }}-${{ hashFiles('**/*.gradle.kts', 'gradle/libs.versions.toml', 'gradle/wrapper/gradle-wrapper.properties') }}
          restore-keys: gradle-${{ runner.os }}-

      - name: Enable KVM
        run: |
          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' \
            | sudo tee /etc/udev/rules.d/99-kvm4all.rules
          sudo udevadm control --reload-rules
          sudo udevadm trigger --name-match=kvm

      - name: Instrumented tests
        uses: reactivecircus/android-emulator-runner@a421e43855164a8197daf9d8d40fe71c6996bb0d # v2.38.0
        env:
          E2E_DISABLE_SYSTEM_UI: "1"
          # The complement of the gating row's notAnnotation, off the same marker,
          # so a test can never be excluded from both jobs or run in both.
          E2E_EXTRA_GRADLE_ARGS: "-Pandroid.testInstrumentationRunnerArguments.annotation=org.libremediaconverter.FailsOnEmulatorApi37"
        with:
          # Every device pin below matches the gating row exactly, so a difference
          # between the two jobs is the test selection and nothing else.
          api-level: "37.0"
          target: google_apis
          arch: x86_64
          profile: pixel_6
          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
          disable-animations: true
          disk-size: 8G
          ram-size: 2560M
          script: bash .github/scripts/e2e-run.sh ${{ env.E2E_LABEL }}

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: e2e-report-api${{ env.E2E_LABEL }}
          path: |
            app/build/reports/androidTests/
            app/build/outputs/androidTest-results/
          if-no-files-found: warn

      # Uploaded always, and here it matters more than anywhere else in this file:
      # this job is EXPECTED to be red, so the logcat is the only thing that says
      # whether it is red for the known reason or for a new one.
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: e2e-diagnostics-api${{ env.E2E_LABEL }}
          path: |
            ${{ runner.temp }}/logcat-api${{ env.E2E_LABEL }}.txt
            ${{ runner.temp }}/diagnostics-api${{ env.E2E_LABEL }}.txt
          if-no-files-found: warn

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: e2e-wedge-api${{ env.E2E_LABEL }}
          path: ${{ runner.temp }}/wedge-diagnostics-api${{ env.E2E_LABEL }}.txt
          if-no-files-found: ignore