CI: Decouple format checks

Author: jserv

.ci/check-format.sh

@@ -1,7 +1,12 @@
 #!/usr/bin/env bash
 
-SOURCES=$(find $(git rev-parse --show-toplevel) | egrep "\.(c|h)\$")
+SOURCES=$(find $(git rev-parse --show-toplevel) | egrep "\.(c|cxx|cpp|h|hpp)\$")
 
 set -x
 
-exit $(clang-format --output-replacements-xml ${SOURCES} | egrep -c "</replacement>")
+for file in ${SOURCES};
+do
+    clang-format-12 ${file} > expected-format
+    diff -u -p --label="${file}" --label="expected coding style" ${file} expected-format
+done
+exit $(clang-format-12 --output-replacements-xml ${SOURCES} | egrep -c "</replacement>")

.github/workflows/main.yml

@@ -18,9 +18,17 @@ jobs:
           sudo apt-get update -q -y
           sudo apt-get install -q -y qemu-user
           sudo apt-get install -q -y build-essential
-          sudo apt-get install -q -y clang-format
-          sh .ci/check-format.sh
           make clean config ARCH=arm
           make check || exit 1
           make clean config ARCH=riscv
           make check || exit 1
+
+  coding_style:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v3
+    - name: coding convention
+      run: |
+            sudo apt-get install -q -y clang-format-12
+            sh .ci/check-format.sh
+      shell: bash