name: 'Apply Kernel Branding & Timestamp'
description: 'Apply Wild kernel branding to kernel version string'
inputs:
  variant:
    description: 'Variant of kernel to apply branding to'
    required: true
  kernel_version:
    description: 'Kernel version (e.g., 6.1)'
    required: true
  android_version:
    description: 'Android version (e.g., android14)'
    required: true
  sublevel:
    description: 'Sublevel of kernel version (e.g., 1)'
    required: true

runs:
  using: "composite"
  steps:
    - name: Apply Kernel Name Branding
      shell: bash
      working-directory: ${{ github.workspace }}/kernel/common
      run: |
        CONFIG_FRAGMENT="${GITHUB_WORKSPACE}/wild_gki.fragment"
        touch "$CONFIG_FRAGMENT"

        DEFCONFIG="${GITHUB_WORKSPACE}/kernel/common/arch/arm64/configs/gki_defconfig"

        if [ "${{ inputs.variant }}" = "Wild" ]; then
          tac scripts/setlocalversion | awk '!seen && /^echo / {seen=1; next} 1' | tac > scripts/setlocalversion.tmp
          mv scripts/setlocalversion.tmp scripts/setlocalversion
          if [ ${{ inputs.kernel_version }} == "6.6" || ${{ inputs.kernel_version }} == "6.12" ]; then
            KERNEL_STRING="${{ inputs.kernel_version }}.${{ inputs.sublevel }}"
            echo "echo \"$KERNEL_STRING-Wild\"" >> scripts/setlocalversion
          else
            echo 'echo "-Wild"' >> scripts/setlocalversion
          fi
        else
          if grep -q '^CONFIG_LOCALVERSION=' "$DEFCONFIG"; then
            LOCALVERSION_VALUE="$(grep -m1 '^CONFIG_LOCALVERSION=' "$DEFCONFIG" | sed -E 's/^CONFIG_LOCALVERSION="?([^"]*)"?$/\1/')"
           echo "CONFIG_LOCALVERSION=\"${LOCALVERSION_VALUE}-Wild\"" >> "$CONFIG_FRAGMENT"
          else
            echo 'CONFIG_LOCALVERSION="-Wild"' >> "$CONFIG_FRAGMENT"
          fi
        fi

        : > .scmversion

        echo "Getting last commit timestamp from kernel source..."


        COMMIT_TIMESTAMP=$(git log -1 --format=%ct 2>/dev/null || echo "$(date +%s)")
        KERNEL_BUILD_DATE=$(date -u)

        export SOURCE_DATE_EPOCH=$COMMIT_TIMESTAMP
        echo "SOURCE_DATE_EPOCH=$COMMIT_TIMESTAMP" >> $GITHUB_ENV
        
        export KBUILD_BUILD_TIMESTAMP="$KERNEL_BUILD_DATE"
        echo "KBUILD_BUILD_TIMESTAMP=$KERNEL_BUILD_DATE" >> $GITHUB_ENV

    - name: Apply Kernel Configuration
      if: ${{ inputs.variant == 'Wild' }}
      shell: bash
      run: |
        cat >> "${{ github.workspace }}/wild_gki.fragment" << 'EOF'
        CONFIG_LOCALVERSION=""
        # CONFIG_LOCALVERSION_AUTO is not set
        EOF