ci: split out multiprocess linting to a separate step on Actions

.github/workflows/build-src.yml

@@ -87,6 +87,14 @@ jobs:
           ccache -c
         shell: bash
 
+      - name: Run linters
+        if: inputs.build-target == 'linux64_multiprocess'
+        run: |
+          export BUILD_TARGET="${{ inputs.build-target }}"
+          source ./ci/dash/matrix.sh
+          ./ci/dash/lint-tidy.sh
+        shell: bash
+
       - name: Run unit tests
         run: |
           BASE_OUTDIR="/output"

ci/dash/build_src.sh

@@ -11,8 +11,7 @@ set -e
 
 source ./ci/dash/matrix.sh
 
-unset CC; unset CXX
-unset DISPLAY
+unset CC CXX DISPLAY;
 
 if [ "$PULL_REQUEST" != "false" ]; then test/lint/commit-script-check.sh $COMMIT_RANGE; fi
 
@@ -51,6 +50,8 @@ make distdir VERSION=$BUILD_TARGET
 cd dashcore-$BUILD_TARGET
 bash -c "./configure $BITCOIN_CONFIG_ALL $BITCOIN_CONFIG" || ( cat config.log && false)
 
+# This step influences compilation and therefore will always be a part of the
+# compile step
 if [ "${RUN_TIDY}" = "true" ]; then
   MAYBE_BEAR="bear --config src/.bear-tidy-config"
   MAYBE_TOKEN="--"
@@ -65,22 +66,10 @@ if [ -n "$USE_VALGRIND" ]; then
     ${BASE_ROOT_DIR}/ci/test/wrap-valgrind.sh
 fi
 
-if [ "${RUN_TIDY}" = "true" ]; then
-  set -eo pipefail
-  cd src
-  ( run-clang-tidy -quiet "${MAKEJOBS}" ) | grep -C5 "error"
-  cd ..
-  iwyu_tool.py \
-    "src/compat" \
-    "src/init" \
-    "src/rpc/fees.cpp" \
-    "src/rpc/signmessage.cpp" \
-    -p . "${MAKEJOBS}" \
-    -- -Xiwyu --cxx17ns -Xiwyu --mapping_file="${BASE_ROOT_DIR}/contrib/devtools/iwyu/bitcoin.core.imp" \
-    2>&1 | tee "/tmp/iwyu_ci.out"
-  cd src
-  fix_includes.py --nosafe_headers < /tmp/iwyu_ci.out
-  git --no-pager diff
+# GitHub Actions can segment a job into steps, linting is a separate step
+# so Actions runners will perform this step separately.
+if [ "${RUN_TIDY}" = "true" ] && [ "${GITHUB_ACTIONS}" != "true" ]; then
+  ${BASE_ROOT_DIR}/ci/dash/lint-tidy.sh
 fi
 
 if [ "$RUN_SECURITY_TESTS" = "true" ]; then

ci/dash/lint-tidy.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Copyright (c) 2025 The Dash Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+export LC_ALL=C.UTF-8
+
+set -eo pipefail
+
+# Warning: This script does not generate the compilation database these linters rely
+#          only on nor do they set the requisite build parameters. Make sure you do
+#          that *before* running this script.
+
+cd "${BASE_ROOT_DIR}/build-ci/dashcore-${BUILD_TARGET}/src"
+( run-clang-tidy -quiet "${MAKEJOBS}" ) | grep -C5 "error"
+
+cd "${BASE_ROOT_DIR}/build-ci/dashcore-${BUILD_TARGET}"
+iwyu_tool.py \
+  "src/compat" \
+  "src/init" \
+  "src/rpc/fees.cpp" \
+  "src/rpc/signmessage.cpp" \
+  -p . "${MAKEJOBS}" \
+  -- -Xiwyu --cxx17ns -Xiwyu --mapping_file="${BASE_ROOT_DIR}/contrib/devtools/iwyu/bitcoin.core.imp" \
+  2>&1 | tee "/tmp/iwyu_ci.out"
+
+cd "${BASE_ROOT_DIR}/build-ci/dashcore-${BUILD_TARGET}/src"
+fix_includes.py --nosafe_headers < /tmp/iwyu_ci.out
+git --no-pager diff