CI: add size test

.github/workflows/test_size.yml

@@ -0,0 +1,91 @@
+name: test size
+
+on: [push, pull_request, workflow_dispatch]
+# paths:
+# - "*"
+# - "!README.md" <-- don't rebuild on doc change
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    container: ardupilot/ardupilot-dev-chibios:latest
+    strategy:
+      fail-fast: false  # don't cancel if a job from the matrix fails
+      matrix:
+        toolchain: [
+            base,  # GCC
+        ]
+        config: [
+            Durandal,
+            MatekF405,
+            Pixhawk1-1M
+        ]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: 'master'
+          path: 'master'
+          submodules: 'recursive'
+      # Put ccache into github cache for faster build
+      - name: Prepare ccache timestamp
+        id: ccache_cache_timestamp
+        run: |
+          NOW=$(date -u +"%F-%T")
+          echo "::set-output name=timestamp::${NOW}"
+      - name: ccache cache files
+        uses: actions/cache@v2
+        with:
+          path: ~/.ccache
+          key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}
+          restore-keys: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-  # restore ccache from either previous build on this branch or on master
+      - name: setup ccache
+        run: |
+          mkdir -p ~/.ccache
+          echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
+          echo "compression = true" >> ~/.ccache/ccache.conf
+          echo "compression_level = 6" >> ~/.ccache/ccache.conf
+          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          ccache -s
+          ccache -z
+
+      - name: Build master ${{matrix.config}} ${{ matrix.toolchain }}
+        env:
+          CI_BUILD_TARGET: ${{matrix.config}}
+        shell: bash
+        run: |
+          PATH="/github/home/.local/bin:$PATH"
+          cd master
+          ./waf configure --board ${{matrix.config}}
+          ./waf
+          mkdir -p $GITHUB_WORKSPACE/master_bin
+          cp -r build/${{matrix.config}}/bin/* $GITHUB_WORKSPACE/master_bin/
+
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          path: 'pr'
+
+      - name: Build PR rebased ${{matrix.config}} ${{ matrix.toolchain }}
+        env:
+          CI_BUILD_TARGET: ${{matrix.config}}
+        shell: bash
+        run: |
+          PATH="/github/home/.local/bin:$PATH"
+          cd pr/
+          git config user.email "ardupilot-ci@ardupilot.org"
+          git config user.name "ArduPilot CI"
+          git remote add ardupilot https://github.com/ArduPilot/ardupilot.git
+          git fetch --no-tags --prune --progress ardupilot master
+          git rebase ardupilot/master
+          git submodule update --init --recursive --depth=1
+          ./waf configure --board ${{matrix.config}}
+          ./waf
+          mkdir $GITHUB_WORKSPACE/pr_bin
+          cp -r build/${{matrix.config}}/bin/* $GITHUB_WORKSPACE/pr_bin/
+
+      - name: Full size compare with Master
+        shell: bash
+        run: |
+          cd pr/
+          python3 -m pip install -U tabulate
+          Tools/scripts/pretty_diff_size.py -m $GITHUB_WORKSPACE/master_bin -s $GITHUB_WORKSPACE/pr_bin