simplify ci

.github/workflows/ci.yml

@@ -46,122 +46,11 @@ jobs:
     runs-on: ${{ matrix.builder }}
     continue-on-error: ${{ matrix.branch == 'version-1-6' || matrix.branch == 'devel' }}
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          submodules: true
-
-      - name: Install build dependencies (Linux i386)
-        if: runner.os == 'Linux' && matrix.target.cpu == 'i386'
-        run: |
-          sudo dpkg --add-architecture i386
-          sudo apt-get update -qq
-          sudo DEBIAN_FRONTEND='noninteractive' apt-get install \
-            --no-install-recommends -yq gcc-multilib g++-multilib \
-            libssl-dev:i386
-          mkdir -p external/bin
-          cat << EOF > external/bin/gcc
-          #!/bin/bash
-          exec $(which gcc) -m32 "\$@"
-          EOF
-          cat << EOF > external/bin/g++
-          #!/bin/bash
-          exec $(which g++) -m32 "\$@"
-          EOF
-          chmod 755 external/bin/gcc external/bin/g++
-          echo '${{ github.workspace }}/external/bin' >> $GITHUB_PATH
-
-      - name: MSYS2 (Windows i386)
-        if: runner.os == 'Windows' && matrix.target.cpu == 'i386'
-        uses: msys2/setup-msys2@v2
-        with:
-          path-type: inherit
-          msystem: MINGW32
-          install: >-
-            base-devel
-            git
-            mingw-w64-i686-toolchain
-
-      - name: MSYS2 (Windows amd64)
-        if: runner.os == 'Windows' && matrix.target.cpu == 'amd64'
-        uses: msys2/setup-msys2@v2
-        with:
-          path-type: inherit
-          install: >-
-            base-devel
-            git
-            mingw-w64-x86_64-toolchain
-
-      - name: Restore Nim DLLs dependencies (Windows) from cache
-        if: runner.os == 'Windows'
-        id: windows-dlls-cache
-        uses: actions/cache@v2
-        with:
-          path: external/dlls
-          key: 'dlls'
-
-      - name: Install DLL dependencies (Windows)
-        if: >
-          steps.windows-dlls-cache.outputs.cache-hit != 'true' &&
-          runner.os == 'Windows'
-        run: |
-          mkdir external
-          curl -L "https://nim-lang.org/download/windeps.zip" -o external/windeps.zip
-          7z x external/windeps.zip -oexternal/dlls
-
-      - name: Path to cached dependencies (Windows)
-        if: >
-          runner.os == 'Windows'
-        run: |
-          echo '${{ github.workspace }}'"/external/dlls" >> $GITHUB_PATH
-
-      - name: Derive environment variables
-        run: |
-          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
-            PLATFORM=x64
-          else
-            PLATFORM=x86
-          fi
-          echo "PLATFORM=$PLATFORM" >> $GITHUB_ENV
-
-          ncpu=
-          MAKE_CMD="make"
-          case '${{ runner.os }}' in
-          'Linux')
-            ncpu=$(nproc)
-            ;;
-          'macOS')
-            ncpu=$(sysctl -n hw.ncpu)
-            ;;
-          'Windows')
-            ncpu=$NUMBER_OF_PROCESSORS
-            MAKE_CMD="mingw32-make"
-            ;;
-          esac
-          [[ -z "$ncpu" || $ncpu -le 0 ]] && ncpu=1
-          echo "ncpu=$ncpu" >> $GITHUB_ENV
-          echo "MAKE_CMD=${MAKE_CMD}" >> $GITHUB_ENV
-
-      - name: Build Nim and Nimble
-        run: |
-          curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
-          env MAKE="${MAKE_CMD} -j${ncpu}" ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ matrix.branch }} \
-            QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=gcc \
-            bash build_nim.sh nim csources dist/nimble NimBinaries
-          echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH
-
-      - name: Run tests
-        run: |
-          if [[ "${{ matrix.target.os }}" == "windows" ]]; then
-            # https://github.com/status-im/nimbus-eth2/issues/3121
-            export NIMFLAGS="-d:nimRawSetjmp"
-          fi
-          nim --version
-          nimble --version
-          nimble install -y --depsOnly
-          nimble test
-          if [[ "${{ matrix.branch }}" == "version-1-6" || "${{ matrix.branch }}" == "devel" ]]; then
-            echo -e "\nTesting with '--gc:orc':\n"
-            export NIMFLAGS="${NIMFLAGS} --gc:orc"
-            nimble test
-          fi;
+    - uses: actions/checkout@v2
+    - uses: iffy/install-nim@v3
+      with:
+        version: ${{ matrix.nim }}
+    - name: Build
+      run: nimble install -y
+    - name: Test
+      run: nimble test -y