Update prerequisites.yml

.github/workflows/prerequisites.yml

@@ -1,31 +1,27 @@
+# .github/workflows/prerequisites.yml
 name: Download Prebuilt Toolchain
 
 on:
-  workflow_call:  # Makes this file callable by other workflows
+  workflow_call:  # Makes this workflow callable by other workflows
 
 jobs:
   setup-prerequisites:
     runs-on: ubuntu-latest
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
+      - name: Download prebuilt toolchain
+        run: |
+          AOSP_MIRROR=https://android.googlesource.com
+          BRANCH=main-kernel-build-2024
 
-    - name: Download prebuilt toolchain
-      run: |
-        AOSP_MIRROR=https://android.googlesource.com
-        BRANCH=main-kernel-build-2024
+          # Clone necessary prebuilt tools
+          git clone $AOSP_MIRROR/platform/prebuilts/build-tools -b $BRANCH --depth 1 build-tools
+          git clone $AOSP_MIRROR/kernel/prebuilts/build-tools -b $BRANCH --depth 1 kernel-build-tools
+          git clone $AOSP_MIRROR/platform/system/tools/mkbootimg -b $BRANCH --depth 1 mkbootimg
 
-        # Clone necessary prebuilt tools
-        git clone $AOSP_MIRROR/platform/prebuilts/build-tools -b $BRANCH --depth 1 build-tools
-        git clone $AOSP_MIRROR/kernel/prebuilts/build-tools -b $BRANCH --depth 1 kernel-build-tools
-        git clone $AOSP_MIRROR/platform/system/tools/mkbootimg -b $BRANCH --depth 1 mkbootimg
-
-        # Export paths to required tools
-        export AVBTOOL=$GITHUB_WORKSPACE/kernel-build-tools/linux-x86/bin/avbtool
-        export GZIP=$GITHUB_WORKSPACE/build-tools/path/linux-x86/gzip
-        export LZ4=$GITHUB_WORKSPACE/build-tools/path/linux-x86/lz4
-        export MKBOOTIMG=$GITHUB_WORKSPACE/mkbootimg/mkbootimg.py
-        export UNPACK_BOOTIMG=$GITHUB_WORKSPACE/mkbootimg/unpack_bootimg.py
-
-        echo "Prerequisites downloaded and paths set up."
+          # Export paths to required tools as environment variables
+          echo "AVBTOOL=$GITHUB_WORKSPACE/kernel-build-tools/linux-x86/bin/avbtool" >> $GITHUB_ENV
+          echo "GZIP=$GITHUB_WORKSPACE/build-tools/path/linux-x86/gzip" >> $GITHUB_ENV
+          echo "LZ4=$GITHUB_WORKSPACE/build-tools/path/linux-x86/lz4" >> $GITHUB_ENV
+          echo "MKBOOTIMG=$GITHUB_WORKSPACE/mkbootimg/mkbootimg.py" >> $GITHUB_ENV
+          echo "UNPACK_BOOTIMG=$GITHUB_WORKSPACE/mkbootimg/unpack_bootimg.py" >> $GITHUB_ENV