Add clang-format-check workflow for GitHub Action (ROCm#493)

* Add clang-format-check workflow for GitHub Action

* Update to clang-format version 17

* Apply clang-format on diff

* Modify diff script

* Run clang-format instead of using Python script

* Update format script

* Update format script

* Update format script

* Use clang-format 17

* Add llvm repo

* Add gpg key

* Compare branches

.github/workflows/clang-format-check.yml

@@ -0,0 +1,28 @@
+name: Check Clang-Format on Diff
+
+on: [push, pull_request]
+
+jobs:
+  clang-format:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Import LLVM GPG Key
+      run: |
+        sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 15CF4D18AF4F7421
+
+    - name: Add LLVM Repository
+      run: |
+        sudo add-apt-repository "deb http://apt.llvm.org/jammy llvm-toolchain-jammy-17 main"
+        sudo apt-get update
+
+    - name: Install clang-format 17
+      run: |
+        sudo apt-get install clang-format-17
+
+    - name: Check Clang-Format on Diff
+      run: |
+        ./clang-format-diff.sh ${{ github.base_ref }} ${{ github.ref }}

clang-format-diff.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+BASE_BRANCH=$1
+CURRENT_BRANCH=$2
+
+# Save unified diff with 0 context
+git diff -U0 --name-only $BASE_BRANCH...$CURRENT_BRANCH > changes.diff
+
+# Apply clang-format on diff
+FORMAT_DIFF=$(clang-format -style=file changes.diff)
+
+if [ ! -z "$FORMAT_DIFF" ]; then
+    echo "The following formatting errors were found:"
+    echo "$FORMAT_DIFF"
+    exit 1
+else
+    echo "All code is properly formatted."
+fi