workflows/eval: disable swap (#431459)

    outputs:

      targetRunId: ${{ steps.targetRunId.outputs.targetRunId }}

    steps:

      - name: Enable swap

      # We'd rather fail than run slow eval on swap.

      # Failing allows us to adjust the chunkSize to remain fast.

      - name: Disable swap

        run: |

          sudo fallocate -l 10G /swap

          sudo chmod 600 /swap

          sudo mkswap /swap

          sudo swapon /swap

          sudo swapoff -a

      - name: Check out the PR at the test merge commit

        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

        run: |

          nix-build untrusted/ci -A eval.singleSystem \

            --argstr evalSystem "$MATRIX_SYSTEM" \

            --arg chunkSize 10000 \

            --arg chunkSize 8000 \

            --out-link merged

          # If it uses too much memory, slightly decrease chunkSize