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| name: snapshot gas | |
| on: | |
| workflow_dispatch: | |
| pull_request: | |
| env: | |
| FOUNDRY_PROFILE: ci | |
| jobs: | |
| snapshot-gas: | |
| name: Diff against gas snapshot | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: actions/checkout@v3 | |
| with: | |
| submodules: recursive | |
| - name: Install Foundry | |
| uses: foundry-rs/foundry-toolchain@v1 | |
| with: | |
| version: "nightly-de33b6af53005037b463318d2628b5cfcaf39916" | |
| - name: Install dependencies | |
| run: forge install | |
| - name: Diff gas snapshot against baseline | |
| run: | | |
| set -euo pipefail | |
| # grep -E '^test' -- skip over test results, just get diffs | |
| forge snapshot --via-ir --diff \ | |
| | grep -E '^test' \ | |
| | tee .gas-snapshot.new | |
| env: | |
| MAINNET_RPC_URL: ${{ secrets.MAINNET_RPC_URL }} | |
| - name: Check diff tolerance | |
| run: | | |
| set -euo pipefail | |
| # 1. skip over diffs of 0 gas (do not fail if no matches) | |
| # 2. skip over negative diffs (do not fail if no matches) | |
| # 3. remove ANSI color / style escape sequences | |
| # 4. extract absolute (not percentage) gas diffs | |
| # 5. pluck any diffs that exceed an absolute tolerance threshold | |
| # and exit non-zero (failure) if any such diff is found | |
| { grep -Ev 'gas: 0' .gas-snapshot.new || true; } \ | |
| | { grep -Ev '\-[0-9]+' || true; } \ | |
| | sed -Ee 's/\x1b\[[0-9;]*m//g' \ | |
| -Ee 's/(.+)\(\) \(gas: ([0-9]+).+/\1 \2/' \ | |
| | awk '{ if ($2 > ENVIRON["GAS_DIFF_THRESHOLD"]) { print; failures++ } } END { if (failures > 0) { print $failures; exit 1 } else { print "ok." } }' | |
| env: | |
| # gas diff check should fail if any gas diff exceeds threshold | |
| GAS_DIFF_THRESHOLD: 5000 |