name: "Check binary size increase"
on:
  pull_request:
    branches: [main]

permissions: read-all

jobs:
  compare-binary-sizes:
    runs-on: ubuntu-latest
    name: compare-with-main
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-go@v5
        with:
          cache: false
          go-version: 1.20.x
      - name: Checkout zot (main branch)
        run: |
          mkdir -p $GITHUB_WORKSPACE/zot_main
          git clone https://github.com/project-zot/zot zot_main/
      - name: Check if zot-minimal binary increased with more than 1%
        run: |
          echo "Building zot-minimal and check size"
          cd $GITHUB_WORKSPACE
          make binary-minimal
          BINSIZE=$(stat -c%s "bin/zot-linux-amd64-minimal")

          echo "Building zot-minimal on main branch and check size"
          cd zot_main
          make binary-minimal
          BINSIZE_MAIN=$(stat -c%s "bin/zot-linux-amd64-minimal")

          echo "PR binary size: $BINSIZE Bytes"
          echo "main branch binary size: $BINSIZE_MAIN Bytes"
          [[ $BINSIZE -eq $BINSIZE_MAIN ]] && echo "zot-minimal binary size is not affected by PR" && exit 0

          if [[ $BINSIZE -gt $BINSIZE_MAIN ]]; then \
            PERCENTAGE=$(printf '%.*f\n' 2 $(echo "scale=2; (($BINSIZE-$BINSIZE_MAIN)*100)/$BINSIZE_MAIN" | bc)); \
            echo "zot minimal binary increased by $PERCENTAGE% comparing with main"; \
            if ((`bc <<< "$PERCENTAGE>=1.0"`)); then exit 1; fi; \
          else \
            PERCENTAGE=$(printf '%.*f\n' 2 $(echo "scale=2; (($BINSIZE_MAIN-$BINSIZE)*100)/$BINSIZE_MAIN" | bc)); \
            echo "zot minimal binary decreased by $PERCENTAGE% comparing with main"; \
          fi
      - if: always()
        name: Check if zb binary increased with more than 1%
        run: |
          echo "Building zb and check size"
          cd $GITHUB_WORKSPACE
          make bench
          BINSIZE=$(stat -c%s "bin/zb-linux-amd64")

          echo "Building zb on main branch and check size"
          cd zot_main
          make bench
          BINSIZE_MAIN=$(stat -c%s "bin/zb-linux-amd64")

          echo "PR binary size: $BINSIZE Bytes"
          echo "main branch binary size: $BINSIZE_MAIN Bytes"
          [[ $BINSIZE -eq $BINSIZE_MAIN ]] && echo "zb binary size is not affected by PR" && exit 0

          if [[ $BINSIZE -gt $BINSIZE_MAIN ]]; then \
            PERCENTAGE=$(printf '%.*f\n' 2 $(echo "scale=2; (($BINSIZE-$BINSIZE_MAIN)*100)/$BINSIZE_MAIN" | bc)); \
            echo "zb binary increased by $PERCENTAGE% comparing with main"; \
            if ((`bc <<< "$PERCENTAGE>=1.0"`)); then exit 1; fi; \
          else \
            PERCENTAGE=$(printf '%.*f\n' 2 $(echo "scale=2; (($BINSIZE_MAIN-$BINSIZE)*100)/$BINSIZE_MAIN" | bc)); \
            echo "zb binary decreased by $PERCENTAGE% comparing with main"; \
          fi
      - if: always()
        name: Check if zli binary increased with more than 1%
        run: |
          echo "Building zli and check size"
          cd $GITHUB_WORKSPACE
          make cli
          BINSIZE=$(stat -c%s "bin/zli-linux-amd64")

          echo "Building zli on main branch and check size"
          cd zot_main
          make cli
          BINSIZE_MAIN=$(stat -c%s "bin/zli-linux-amd64")

          echo "PR binary size: $BINSIZE Bytes"
          echo "main branch binary size: $BINSIZE_MAIN Bytes"
          [[ $BINSIZE -eq $BINSIZE_MAIN ]] && echo "zli binary size is not affected by PR" && exit 0

          if [[ $BINSIZE -gt $BINSIZE_MAIN ]]; then \
            PERCENTAGE=$(printf '%.*f\n' 2 $(echo "scale=2; (($BINSIZE-$BINSIZE_MAIN)*100)/$BINSIZE_MAIN" | bc)); \
            echo "zli binary increased by $PERCENTAGE% comparing with main"; \
            if ((`bc <<< "$PERCENTAGE>=1.0"`)); then exit 1; fi; \
          else \
            PERCENTAGE=$(printf '%.*f\n' 2 $(echo "scale=2; (($BINSIZE_MAIN-$BINSIZE)*100)/$BINSIZE_MAIN" | bc)); \
            echo "zli binary decreased by $PERCENTAGE% comparing with main"; \
          fi