chore(ci): change way to modified files in clang-tidy-differential (#7639)

* chore(ci): fetch full depth in clang-tidy-differential

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

* chore(ci): use raw git to get modified files

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

* chore(ci): fix deprecated GitHub actions variable operation

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

* chore(ci): delete unnecessary steps

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

* refactor(ci): unite multiple command line into one line

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

---------

Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

Author: HansRobo

.github/workflows/clang-tidy-differential.yaml

@@ -20,14 +20,10 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/autowarefoundation/autoware:latest-prebuilt-cuda
     steps:
-      - name: Set PR fetch depth
-        run: echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 1 ))" >> "${GITHUB_ENV}"
-
       - name: Checkout PR branch and all PR commits
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
-          fetch-depth: ${{ env.PR_FETCH_DEPTH }}
+          fetch-depth: 0
 
       - name: Show disk space before the tasks
         run: df -h
@@ -41,19 +37,17 @@ jobs:
 
       - name: Get modified files
         id: get-modified-files
-        uses: tj-actions/changed-files@v42
-        with:
-          files: |
-            **/*.cpp
-            **/*.hpp
+        run: |
+          echo "changed_files=$(git diff --name-only "origin/${{ github.base_ref }}"...HEAD | grep -E '\.(cpp|hpp)$' || true)" >> $GITHUB_OUTPUT
+        shell: bash
 
       - name: Run clang-tidy
-        if: ${{ steps.get-modified-files.outputs.all_changed_files != '' }}
+        if: ${{ steps.get-modified-files.outputs.changed_files != '' }}
         uses: autowarefoundation/autoware-github-actions/clang-tidy@v1
         with:
           rosdistro: humble
           target-packages: ${{ steps.get-modified-packages.outputs.modified-packages }}
-          target-files: ${{ steps.get-modified-files.outputs.all_changed_files }}
+          target-files: ${{ steps.get-modified-files.outputs.changed_files }}
           clang-tidy-config-url: https://raw.githubusercontent.com/autowarefoundation/autoware/main/.clang-tidy
           build-depends-repos: build_depends.repos