name: test
on: [push, pull_request]

env:
  CFLAGS: -Werror
  MAKEFLAGS: -j

jobs:
  # run tests
  test:
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        arch: [x86_64, thumb, mips, powerpc]

    steps:
      - uses: actions/checkout@v2
      - name: install
        run: |
          # need a few additional tools
          #
          # note this includes gcc-10, which is required for -fcallgraph-info=su
          sudo apt-get update -qq
          sudo apt-get install -qq gcc-10 python3 python3-pip lcov
          sudo pip3 install toml
          echo "CC=gcc-10" >> $GITHUB_ENV
          gcc-10 --version
          lcov --version
          python3 --version

          # need newer lcov version for gcc-10
          #sudo apt-get remove lcov
          #wget https://launchpad.net/ubuntu/+archive/primary/+files/lcov_1.15-1_all.deb
          #sudo apt install ./lcov_1.15-1_all.deb
          #lcov --version
          #which lcov
          #ls -lha /usr/bin/lcov
          wget https://github.com/linux-test-project/lcov/releases/download/v1.15/lcov-1.15.tar.gz
          tar xf lcov-1.15.tar.gz
          sudo make -C lcov-1.15 install

          # setup a ram-backed disk to speed up reentrant tests
          mkdir disks
          sudo mount -t tmpfs -o size=100m tmpfs disks
          TESTFLAGS="$TESTFLAGS --disk=disks/disk"

          # collect coverage
          mkdir -p coverage
          TESTFLAGS="$TESTFLAGS --coverage=`
            `coverage/${{github.job}}-${{matrix.arch}}.info"

          echo "TESTFLAGS=$TESTFLAGS" >> $GITHUB_ENV

      # cross-compile with ARM Thumb (32-bit, little-endian)
      - name: install-thumb
        if: ${{matrix.arch == 'thumb'}}
        run: |
          sudo apt-get install -qq \
            gcc-10-arm-linux-gnueabi \
            libc6-dev-armel-cross \
            qemu-user
          echo "CC=arm-linux-gnueabi-gcc-10 -mthumb --static" >> $GITHUB_ENV
          echo "EXEC=qemu-arm" >> $GITHUB_ENV
          arm-linux-gnueabi-gcc-10 --version
          qemu-arm -version
      # cross-compile with MIPS (32-bit, big-endian)
      - name: install-mips
        if: ${{matrix.arch == 'mips'}}
        run: |
          sudo apt-get install -qq \
            gcc-10-mips-linux-gnu \
            libc6-dev-mips-cross \
            qemu-user
          echo "CC=mips-linux-gnu-gcc-10 --static" >> $GITHUB_ENV
          echo "EXEC=qemu-mips" >> $GITHUB_ENV
          mips-linux-gnu-gcc-10 --version
          qemu-mips -version
      # cross-compile with PowerPC (32-bit, big-endian)
      - name: install-powerpc
        if: ${{matrix.arch == 'powerpc'}}
        run: |
          sudo apt-get install -qq \
            gcc-10-powerpc-linux-gnu \
            libc6-dev-powerpc-cross \
            qemu-user
          echo "CC=powerpc-linux-gnu-gcc-10 --static" >> $GITHUB_ENV
          echo "EXEC=qemu-ppc" >> $GITHUB_ENV
          powerpc-linux-gnu-gcc-10 --version
          qemu-ppc -version

      # make sure example can at least compile
      - name: test-example
        run: |
          sed -n '/``` c/,/```/{/```/d; p}' README.md > test.c
          make all CFLAGS+=" \
            -Duser_provided_block_device_read=NULL \
            -Duser_provided_block_device_prog=NULL \
            -Duser_provided_block_device_erase=NULL \
            -Duser_provided_block_device_sync=NULL \
            -include stdio.h"
          rm test.c

      # test configurations
      # normal+reentrant tests
      - name: test-default
        run: |
          make clean
          make test TESTFLAGS+="-nrk"
      # NOR flash: read/prog = 1 block = 4KiB
      - name: test-nor
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_READ_SIZE=1 -DLFS_BLOCK_SIZE=4096"
      # SD/eMMC: read/prog = 512 block = 512
      - name: test-emmc
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_READ_SIZE=512 -DLFS_BLOCK_SIZE=512"
      # NAND flash: read/prog = 4KiB block = 32KiB
      - name: test-nand
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_READ_SIZE=4096 -DLFS_BLOCK_SIZE=\(32*1024\)"
      # other extreme geometries that are useful for various corner cases
      - name: test-no-intrinsics
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_NO_INTRINSICS"
      - name: test-byte-writes
        # it just takes too long to test byte-level writes when in qemu,
        # should be plenty covered by the other configurations
        if: ${{matrix.arch == 'x86_64'}}
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_READ_SIZE=1 -DLFS_CACHE_SIZE=1"
      - name: test-block-cycles
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_BLOCK_CYCLES=1"
      - name: test-odd-block-count
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_BLOCK_COUNT=1023 -DLFS_LOOKAHEAD_SIZE=256"
      - name: test-odd-block-size
        run: |
          make clean
          make test TESTFLAGS+="-nrk \
            -DLFS_READ_SIZE=11 -DLFS_BLOCK_SIZE=704"

      # upload coverage for later coverage
      - name: upload-coverage
        uses: actions/upload-artifact@v2
        with:
          name: coverage
          path: coverage
          retention-days: 1

      # update results
      - name: results
        run: |
          mkdir -p results
          make clean
          make lfs.csv \
            CFLAGS+=" \
              -DLFS_NO_ASSERT \
              -DLFS_NO_DEBUG \
              -DLFS_NO_WARN \
              -DLFS_NO_ERROR"
          cp lfs.csv results/${{matrix.arch}}.csv
          ./scripts/summary.py results/${{matrix.arch}}.csv
      - name: results-readonly
        run: |
          mkdir -p results
          make clean
          make lfs.csv \
            CFLAGS+=" \
              -DLFS_NO_ASSERT \
              -DLFS_NO_DEBUG \
              -DLFS_NO_WARN \
              -DLFS_NO_ERROR \
              -DLFS_READONLY"
          cp lfs.csv results/${{matrix.arch}}-readonly.csv
          ./scripts/summary.py results/${{matrix.arch}}-readonly.csv
      - name: results-threadsafe
        run: |
          mkdir -p results
          make clean
          make lfs.csv \
            CFLAGS+=" \
              -DLFS_NO_ASSERT \
              -DLFS_NO_DEBUG \
              -DLFS_NO_WARN \
              -DLFS_NO_ERROR \
              -DLFS_THREADSAFE"
          cp lfs.csv results/${{matrix.arch}}-threadsafe.csv
          ./scripts/summary.py results/${{matrix.arch}}-threadsafe.csv
      - name: results-migrate
        run: |
          mkdir -p results
          make clean
          make lfs.csv \
            CFLAGS+=" \
              -DLFS_NO_ASSERT \
              -DLFS_NO_DEBUG \
              -DLFS_NO_WARN \
              -DLFS_NO_ERROR \
              -DLFS_MIGRATE"
          cp lfs.csv results/${{matrix.arch}}-migrate.csv
          ./scripts/summary.py results/${{matrix.arch}}-migrate.csv
      - name: results-error-asserts
        run: |
          mkdir -p results
          make clean
          make lfs.csv \
            CFLAGS+=" \
              -DLFS_NO_DEBUG \
              -DLFS_NO_WARN \
              -DLFS_NO_ERROR \
              -D'LFS_ASSERT(test)=do {if(!(test)) {return -1;}} while(0)'"
          cp lfs.csv results/${{matrix.arch}}-error-asserts.csv
          ./scripts/summary.py results/${{matrix.arch}}-error-asserts.csv
      - name: upload-results
        uses: actions/upload-artifact@v2
        with:
          name: results
          path: results

      # create statuses with results
      - name: collect-status
        run: |
          mkdir -p status
          for f in $(shopt -s nullglob ; echo results/*.csv)
          do
            export STEP="results$(
              echo $f | sed -n 's/[^-]*-\(.*\).csv/-\1/p')"
            for r in code stack structs
            do
              export CONTEXT="results (${{matrix.arch}}$(
                echo $f | sed -n 's/[^-]*-\(.*\).csv/, \1/p')) / $r"
              export PREV="$(curl -sS \
                "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master?per_page=100" \
                | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
                  | select(.context == env.CONTEXT).description
                  | capture("(?<result>[0-9∞]+)").result' \
                || echo 0)"
              export DESCRIPTION="$(./scripts/summary.py $f -f $r -Y | awk '
                NR==2 {printf "%s B",$2}
                NR==2 && ENVIRON["PREV"]+0 != 0 {
                  printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}')"
              jq -n '{
                state: "success",
                context: env.CONTEXT,
                description: env.DESCRIPTION,
                target_job: "${{github.job}} (${{matrix.arch}})",
                target_step: env.STEP}' \
                | tee status/$r-${{matrix.arch}}$(
                  echo $f | sed -n 's/[^-]*-\(.*\).csv/-\1/p').json
            done
          done
      - name: upload-status
        uses: actions/upload-artifact@v2
        with:
          name: status
          path: status
          retention-days: 1

  # run under Valgrind to check for memory errors
  valgrind:
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v2
      - name: install
        run: |
          # need toml, also pip3 isn't installed by default?
          sudo apt-get update -qq
          sudo apt-get install -qq python3 python3-pip
          sudo pip3 install toml
      - name: install-valgrind
        run: |
          sudo apt-get update -qq
          sudo apt-get install -qq valgrind
          valgrind --version
      # normal tests, we don't need to test all geometries
      - name: test-valgrind
        run: make test TESTFLAGS+="-k --valgrind"

  # self-host with littlefs-fuse for a fuzz-like test
  fuse:
    runs-on: ubuntu-20.04
    if: ${{!endsWith(github.ref, '-prefix')}}
    steps:
      - uses: actions/checkout@v2
      - name: install
        run: |
          # need toml, also pip3 isn't installed by default?
          sudo apt-get update -qq
          sudo apt-get install -qq python3 python3-pip libfuse-dev
          sudo pip3 install toml
          fusermount -V
          gcc --version
      - uses: actions/checkout@v2
        with:
          repository: littlefs-project/littlefs-fuse
          ref: v2
          path: littlefs-fuse
      - name: setup
        run: |
          # copy our new version into littlefs-fuse
          rm -rf littlefs-fuse/littlefs/*
          cp -r $(git ls-tree --name-only HEAD) littlefs-fuse/littlefs

          # setup disk for littlefs-fuse
          mkdir mount
          LOOP=$(sudo losetup -f)
          sudo chmod a+rw $LOOP
          dd if=/dev/zero bs=512 count=128K of=disk
          losetup $LOOP disk
          echo "LOOP=$LOOP" >> $GITHUB_ENV
      - name: test
        run: |
          # self-host test
          make -C littlefs-fuse

          littlefs-fuse/lfs --format $LOOP
          littlefs-fuse/lfs $LOOP mount

          ls mount
          mkdir mount/littlefs
          cp -r $(git ls-tree --name-only HEAD) mount/littlefs
          cd mount/littlefs
          stat .
          ls -flh
          make -B test

  # test migration using littlefs-fuse
  migrate:
    runs-on: ubuntu-20.04
    if: ${{!endsWith(github.ref, '-prefix')}}
    steps:
      - uses: actions/checkout@v2
      - name: install
        run: |
          # need toml, also pip3 isn't installed by default?
          sudo apt-get update -qq
          sudo apt-get install -qq python3 python3-pip libfuse-dev
          sudo pip3 install toml
          fusermount -V
          gcc --version
      - uses: actions/checkout@v2
        with:
          repository: littlefs-project/littlefs-fuse
          ref: v2
          path: v2
      - uses: actions/checkout@v2
        with:
          repository: littlefs-project/littlefs-fuse
          ref: v1
          path: v1
      - name: setup
        run: |
          # copy our new version into littlefs-fuse
          rm -rf v2/littlefs/*
          cp -r $(git ls-tree --name-only HEAD) v2/littlefs

          # setup disk for littlefs-fuse
          mkdir mount
          LOOP=$(sudo losetup -f)
          sudo chmod a+rw $LOOP
          dd if=/dev/zero bs=512 count=128K of=disk
          losetup $LOOP disk
          echo "LOOP=$LOOP" >> $GITHUB_ENV
      - name: test
        run: |
          # compile v1 and v2
          make -C v1
          make -C v2

          # run self-host test with v1
          v1/lfs --format $LOOP
          v1/lfs $LOOP mount

          ls mount
          mkdir mount/littlefs
          cp -r $(git ls-tree --name-only HEAD) mount/littlefs
          cd mount/littlefs
          stat .
          ls -flh
          make -B test

          # attempt to migrate
          cd ../..
          fusermount -u mount

          v2/lfs --migrate $LOOP
          v2/lfs $LOOP mount

          # run self-host test with v2 right where we left off
          ls mount
          cd mount/littlefs
          stat .
          ls -flh
          make -B test

  # collect coverage info
  coverage:
    runs-on: ubuntu-20.04
    needs: [test]
    steps:
      - uses: actions/checkout@v2
      - name: install
        run: |
          sudo apt-get update -qq
          sudo apt-get install -qq python3 python3-pip lcov
          sudo pip3 install toml
      # yes we continue-on-error nearly every step, continue-on-error
      # at job level apparently still marks a job as failed, which isn't
      # what we want
      - uses: actions/download-artifact@v2
        continue-on-error: true
        with:
          name: coverage
          path: coverage
      - name: results-coverage
        continue-on-error: true
        run: |
          mkdir -p results
          lcov $(for f in coverage/*.info ; do echo "-a $f" ; done) \
            -o results/coverage.info
          ./scripts/coverage.py results/coverage.info -o results/coverage.csv
      - name: upload-results
        uses: actions/upload-artifact@v2
        with:
          name: results
          path: results
      - name: collect-status
        run: |
          mkdir -p status
          [ -e results/coverage.csv ] || exit 0
          export STEP="results-coverage"
          export CONTEXT="results / coverage"
          export PREV="$(curl -sS \
            "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master?per_page=100" \
            | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
              | select(.context == env.CONTEXT).description
              | capture("(?<result>[0-9\\.]+)").result' \
            || echo 0)"
          export DESCRIPTION="$(
            ./scripts/coverage.py -u results/coverage.csv -Y | awk -F '[ /%]+' '
              NR==2 {printf "%.1f%% of %d lines",$4,$3}
              NR==2 && ENVIRON["PREV"]+0 != 0 {
                printf " (%+.1f%%)",$4-ENVIRON["PREV"]}')"
          jq -n '{
            state: "success",
            context: env.CONTEXT,
            description: env.DESCRIPTION,
            target_job: "${{github.job}}",
            target_step: env.STEP}' \
            | tee status/coverage.json
      - name: upload-status
        uses: actions/upload-artifact@v2
        with:
          name: status
          path: status
          retention-days: 1
