CI: Move bytecode report comparison logic to a script

.circleci/compare_bytecode_reports.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+#------------------------------------------------------------------------------
+# Compares bytecode reports generated by prepare_report.py/.js.
+#
+# ------------------------------------------------------------------------------
+# 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) 2023 solidity contributors.
+#------------------------------------------------------------------------------
+
+no_cli_platforms=(
+    emscripten
+)
+native_platforms=(
+    ubuntu2004-static
+    ubuntu
+    osx
+    windows
+)
+interfaces=(
+    cli
+    standard-json
+)
+
+report_files=()
+for platform in "${no_cli_platforms[@]}"; do
+    report_files+=("bytecode-report-${platform}.txt")
+done
+for platform in "${native_platforms[@]}"; do
+    for interface in "${interfaces[@]}"; do
+        report_files+=("bytecode-report-${platform}-${interface}.txt")
+    done
+done
+
+echo "Reports to compare:"
+printf -- "- %s\n" "${report_files[@]}"
+
+if ! diff --brief --report-identical-files --from-file "${report_files[@]}"; then
+    diff --unified=0 --report-identical-files --from-file "${report_files[@]}" | head --lines 50
+    zip "all-bytecode-reports.zip" "${report_files[@]}"
+    exit 1
+fi

.circleci/config.yml

@@ -1566,31 +1566,11 @@ jobs:
 
   t_bytecode_compare:
     <<: *base_ubuntu2204_small
-    environment:
-      REPORT_FILES: |
-        bytecode-report-emscripten.txt
-        bytecode-report-ubuntu2004-static-standard-json.txt
-        bytecode-report-ubuntu2004-static-cli.txt
-        bytecode-report-ubuntu-standard-json.txt
-        bytecode-report-ubuntu-cli.txt
-        bytecode-report-osx-standard-json.txt
-        bytecode-report-osx-cli.txt
-        bytecode-report-windows-standard-json.txt
-        bytecode-report-windows-cli.txt
     steps:
+      - checkout
       - attach_workspace:
           at: .
-      - run:
-          name: Compare reports
-          command: diff --brief --report-identical-files --from-file $REPORT_FILES
-      - run:
-          name: Print diff
-          when: on_fail
-          command: diff --unified=0 --report-identical-files --from-file $REPORT_FILES | head --lines 50
-      - run:
-          name: Bundle reports into a single package
-          when: on_fail
-          command: zip all-bytecode-reports.zip $REPORT_FILES
+      - run: .circleci/compare_bytecode_reports.sh
       - store_artifacts:
           # NOTE: store_artifacts does not support the 'when' attribute.
           # Fortunately when the artifact does not exist it just says "No artifact files found" and ignores it.