ci: move code format check out of the main job/script (#1154)

A bit cleaner than the written-in-a-haste-to-get-ci-going-again current approach.

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

.github/workflows/presubmit.yml

@@ -6,7 +6,6 @@ jobs:
     name: Build ${{ matrix.os }} ${{ matrix.name }}
     runs-on: ${{ matrix.os }}
     env:
-      JOB_CHECK_FORMAT: ${{ matrix.format }}
       JOB_ARCHITECTURE: ${{ matrix.arch }}
       JOB_ENABLE_GL: ${{ matrix.gl }}
     strategy:
@@ -17,10 +16,6 @@ jobs:
           - os: ubuntu-20.04
             mainmatrix: true
             gl: 1
-          - os: ubuntu-20.04
-            mainmatrix: false
-            name: Format
-            format: 1
           - os: ubuntu-20.04
             mainmatrix: false
             name: Arm
@@ -30,11 +25,17 @@ jobs:
             name: AArch64
             arch: aarch64
     steps:
-      - name: Setup
-        run: if [[ "${{matrix.format}}" == "1" ]]; then sudo apt install -y clang-format; fi
+      - uses: actions/checkout@v2
+      - name: Build
+        run: ./presubmit.sh
+  formatcheck:
+    name: Check code format
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Install packages
+        run: sudo apt install -y clang-format
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
-      - name: Build
-        run: ./presubmit.sh
-
+      - name: Check code format
+        run: ./check-format.sh

presubmit.sh

@@ -4,11 +4,6 @@ set -e
 
 export TOP=$(pwd)
 
-if [[ "${JOB_CHECK_FORMAT}" == "1" ]]; then
-    ./check-format.sh
-    exit $?
-fi
-
 TOOLCHAIN_URL_arm="https://releases.linaro.org/components/toolchain/binaries/7.5-2019.12/arm-linux-gnueabihf/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf.tar.xz"
 TOOLCHAIN_URL_aarch64="https://releases.linaro.org/components/toolchain/binaries/7.5-2019.12/aarch64-linux-gnu/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz"