[CI] add clang-format

Signed-off-by: Anton Dukhovnikov <[email protected]>

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       #
       # To add more build types (Release, Debug, RelWithDebInfo, etc.) customize the build_type list.
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         build_type: [Release]
         c_compiler: [gcc, clang, cl]
         include:
@@ -36,13 +36,26 @@ jobs:
           - os: ubuntu-latest
             c_compiler: clang
             cpp_compiler: clang++
+          - os: macos-latest
+            c_compiler: clang
+            cpp_compiler: clang++
+          - desc: "clang-format"
+            nametag: clang-format
+            os: ubuntu-latest
+            container: aswf/ci-osl:2022-clang12
+            skip_tests: 1
+            setenvs: export BUILDTARGET=clang-format
         exclude:
           - os: windows-latest
             c_compiler: gcc
           - os: windows-latest
             c_compiler: clang
           - os: ubuntu-latest
             c_compiler: cl
+          - os: macos-latest
+            c_compiler: cl
+          - os: macos-latest
+            c_compiler: gcc
 
     steps:
     - uses: actions/checkout@v3