Benchmark report collector job + summary

scripts/externalTests/summarize_benchmarks.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+
+# ------------------------------------------------------------------------------
+# Reads a combined benchmark report from standard input and outputs an abbreviated
+# report containing only totals. Can handle individual reports coming directly
+# from scripts in test/externalTests/ as well as combined report from merge_benchmarks.sh.
+#
+# Usage:
+#    <script name>.sh < <CONCATENATED_REPORTS>
+#
+# CONCATENATED_REPORTS: JSON report files concatenated into a single stream (e.g. using cat).
+#
+# Example:
+#    cat reports/externalTests/benchmark-*.json | <script name>.sh
+# ------------------------------------------------------------------------------
+# This file is part of solidity.
+#
+# solidity is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# solidity is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with solidity.  If not, see <http://www.gnu.org/licenses/>
+#
+# (c) 2021 solidity contributors.
+#------------------------------------------------------------------------------
+
+set -euo pipefail
+
+REPO_ROOT=$(realpath "$(dirname "$0")/../..")
+
+# Iterates over presets in a dict of the form {"<project>": {"<preset>": {...}}} and for each
+# one preserves only the few keys with totals that we want to see in the summary.
+exec "${REPO_ROOT}/scripts/externalTests/merge_benchmarks.sh" | jq --indent 4 --sort-keys '
+    with_entries({
+        key: .key,
+        value: .value | with_entries({
+            key: .key,
+            value: {
+                bytecode_size: .value.total_bytecode_size,
+                method_gas: .value.gas.total_method_gas,
+                deployment_gas: .value.gas.total_deployment_gas,
+                version: .value.project.version
+            }
+        })
+    })
+'