post-merge.yml

name: Post Merge

on:
  push:
    branches: [ "main" ]

env:
    CARGO_TERM_COLOR: always
    RUSTFLAGS: "-Dwarnings"
    
jobs:
    update_code_coverage_threshold:
        name: Generate Code Coverage
        runs-on: ubuntu-latest
        steps:
          - uses: actions/checkout@v3
          - uses: actions-rust-lang/setup-rust-toolchain@v1
          - uses: taiki-e/install-action@cargo-llvm-cov
          - run:  cargo llvm-cov --cobertura --output-path coverage.cobertura.xml
          - uses: irongut/CodeCoverageSummary@v1.3.0
            with:
              filename: coverage.cobertura.xml
              badge: true
              fail_below_min: true
              format: markdown
              hide_branch_rate: false
              hide_complexity: true
              indicators: true
              output: both
              thresholds: 20
          - run: |
              CURRENT_COVERAGE=$(grep '<coverage' coverage.cobertura.xml | grep -o 'line-rate="[0-9.]\+"' | grep -o '[0-9.]\+')
              CURRENT_COVERAGE=$(printf %.0f $(echo "$CURRENT_COVERAGE*100" | bc))
              CURRENT_LOWER_THRESHOLD=$(echo "$CURRENT_COVERAGE-2" | bc)
              CURRENT_UPPER_THRESHOLD=$(echo "$CURRENT_COVERAGE+2" | bc)
              echo "CURRENT_LOWER_THRESHOLD=$CURRENT_LOWER_THRESHOLD" >> $GITHUB_ENV
              echo "CURRENT_UPPER_THRESHOLD=$CURRENT_UPPER_THRESHOLD" >> $GITHUB_ENV
          - uses: actions/checkout@v4
            with:
              ref: locked_actions_branch
          - name: read threshold file into environment variable
            run: |
              LOWER_COVERAGE_THRESHOLD=$(cat ./ci/coverage_threshold.txt |  cut -d ' ' -f1)
              echo "LOWER_COVERAGE_THRESHOLD=$LOWER_COVERAGE_THRESHOLD" >> $GITHUB_ENV
          - name: commit threshold changes
            if: ${{ fromJSON(env.CURRENT_LOWER_THRESHOLD) > fromJSON(env.LOWER_COVERAGE_THRESHOLD) }}
            run: |
              git config user.name "github-actions[bot]"
              git config user.email "github-actions[bot]@users.noreply.github.com"
              rm ./ci/coverage_threshold.txt
              echo "${{ env.CURRENT_LOWER_THRESHOLD }}  ${{ env.CURRENT_UPPER_THRESHOLD }} " > ./ci/coverage_threshold.txt
              git add ./ci/coverage_threshold.txt
              git commit -m "chore: git bot update threshold"
          - name: push changes
            uses: ad-m/github-push-action@master
            with:
              branch: locked_actions_branch
        continue-on-error: true