name: Changes
on:
  workflow_dispatch:
  workflow_call:
    inputs:
      runner:
        required: true
        type: string
      reference:
        required: true
        type: string
      packagesrepo:
        required: false
        type: string

jobs:

  Prepare:
    runs-on: Linux
    name: Source changes
    if: ${{ github.repository_owner == 'Armbian' }}

    steps:

      - name: Runner prepare
        uses: armbian/actions/runner-prepare@main

      # we are comparing hash on subdirs so we need full clone
      - name: Checkout repository
        uses: actions/checkout@v3.1.0
        with:
          fetch-depth: 0 
          repository: armbian/build
          path: build
          ref:  ${{ inputs.reference }}
          clean: true

      - name: Checkout support scripts
        uses: actions/checkout@v3.1.0
        with:
          fetch-depth: 0
          repository: armbian/scripts
          path: scripts
          ref: master
          clean: true

      - name: Remove previous artefacts if any
        run: |
          printenv > 2.txt
          sudo rm -rf changes 2>/dev/null || true

      - name: Determine changed kernels
        run: |

          PACKAGESREPO=${{ inputs.packagesrepo }}
          BETA=${PACKAGESREPO:-yes}

          # Declare this folder as safe
          if [[ -z $(cat ${HOME}/.gitconfig 2>/dev/null | grep "directory = \*") ]]; then
                  git config --global --add safe.directory "*"
          fi

          # fake function
          enable_extension ()
          {
          return 0
          }

           VALUES="legacy current edge"

           # [[ "$BETA" == no ]] && VALUES="legacy current"
           MATRIX=$(for BRANCH in $VALUES; do
              FILES=$(cat build/config/targets*.conf | grep $BRANCH | grep -v "^$" | grep -v "^#" | sed -n $LINE'p' | cut -d " " -f1 | uniq)
              while IFS= read -r line; do

               unset LINUXFAMILY KERNELPATCHDIR LINUXCONFIG KERNELSOURCE KERNEL_VERSION_LEVEL KERNELSWITCHOBJ
               BOARDFAMILY=$(cat build/config/boards/$line.* | grep BOARDFAMILY | cut -d'"' -f2)
               BOARD=$line
               source build/config/boards/$line.conf 2> /dev/null || true
               source build/config/boards/$line.wip 2> /dev/null || true
               source build/config/sources/families/${BOARDFAMILY}.conf 2> /dev/null || true
               
               # exceptions handling
               [[ ${BOARDFAMILY} == *x86 ]] && BOARDFAMILY=x86
               [[ ${BOARDFAMILY} == *arm64 ]] && BOARDFAMILY=arm64
               [[ ${BOARDFAMILY} == sun*i ]] && BOARDFAMILY=sunxi
               [[ ${BOARDFAMILY} == sun8i-v3s ]] && BOARDFAMILY=sunxi
               [[ ${BOARDFAMILY} == sun*iw* && ${BRANCH} != legacy ]] && BOARDFAMILY=sunxi64
               [[ ${BOARDFAMILY} == meson8b ]] && BOARDFAMILY=meson
               [[ ${BOARDFAMILY} == meson-* || ${BOARDFAMILY} == jethub ]] && BOARDFAMILY=meson64
               [[ ${BOARDFAMILY} == rk35xx && ${BRANCH} != legacy ]] && BOARDFAMILY=rockchip64
               [[ ${BOARDFAMILY} == rk3399 && ${BRANCH} != legacy ]] && BOARDFAMILY=rockchip64
               [[ ${BOARDFAMILY} == jetson-nano && ${BRANCH} != legacy ]] && BOARDFAMILY=media
               [[ ${BOARDFAMILY} == media && ${BRANCH} == legacy ]] && BOARDFAMILY=station-p2
               [[ ${BOARDFAMILY} == rockpis && ${BRANCH} != legacy ]] && BOARDFAMILY=rockchip64
               [[ ${BOARDFAMILY} == bcm2711 && ${BRANCH} == legacy ]] && continue
               
               #[[ -n "${KERNELSWITCHOBJ}" ]] && KERNELBRANCH=${KERNELSWITCHOBJ/=/:}
               
                  ref_type=${KERNELBRANCH%%:*}
                  if [[ $ref_type == head ]]; then
                      ref_name=HEAD
                  else
                      ref_name=${KERNELBRANCH##*:}
                  fi
                  [[ -z ${LINUXFAMILY} ]] && LINUXFAMILY=$BOARDFAMILY
                  [[ -z ${KERNELPATCHDIR} ]] && KERNELPATCHDIR=$LINUXFAMILY-$BRANCH
                  [[ -z ${LINUXCONFIG} ]] && LINUXCONFIG=linux-$LINUXFAMILY-$BRANCH
                  [[ -z ${KERNELSOURCE} ]] && KERNELSOURCE="https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux-stable"
               
                  case $ref_type in
                      branch) CALC_HASH=$(git ls-remote "${KERNELSOURCE}" refs/heads/"${ref_name}" 2> /dev/null | awk '{print $1}') ;;
                      tag) CALC_HASH=$(git ls-remote "${KERNELSOURCE}" tags/"${ref_name}" 2> /dev/null | awk '{print $1}') ;;
                      head) CALC_HASH=$(git ls-remote "${KERNELSOURCE}" HEAD 2> /dev/null | awk '{print $1}') ;;
                      commit) CALC_HASH=$ref_name ;;
                  esac
               
                  SRC="$(pwd)/build"
                  
                  CALC_PATCHES=$(git -C $SRC log --format="%H" -1 -- $(realpath --relative-base="$SRC" "${SRC}/patch/kernel/${KERNELPATCHDIR}"))
                  [[ -z "$CALC_PATCHES" ]] && CALC_PATCHES="null"
                  
                  CALC_CONFIG=$(git -C $SRC log --format="%H" -1 -- $(realpath --relative-base="$SRC" "${SRC}/config/kernel/${LINUXCONFIG}.config"))
                  [[ -z "$CALC_CONFIG" ]] && CALC_CONFIG="null"
                  
                  # ignore diff checking in case of network errrors
                  kernel_hash="scripts/hash-beta/linux-image-${BRANCH}-${LINUXFAMILY}.githash"
                  
                  if [[ -f $kernel_hash ]] ; then
                  STORED_HASH=$(sed -n '1p' < "${kernel_hash}")
                  STORED_PATCHES=$(sed -n '2p' < "${kernel_hash}")
                  STORED_CONFIG=$(sed -n '3p' < "${kernel_hash}")
                  fi
                  
                  # if stored is null, we don't check                   
                  [[ "$STORED_PATCHES" == "null" ]] && CALC_PATCHES="null"
                  [[ "$STORED_CONFIG" == "null" ]] && CALC_CONFIG="null"
                  # in bugfix rebuild, we rebuild all kernels (current branch only)
                  if [[ "$BETA" == no ]]; then
                        echo "${LINUXFAMILY}:${BOARDFAMILY}:${BRANCH}:${line}:${ARCH}"
                  elif [[ "$CALC_HASH" == "$STORED_HASH" && "$CALC_CONFIG" == "$STORED_CONFIG" && "$CALC_PATCHES" == "$STORED_PATCHES" ]];then
                      :
                  else
                      echo "${LINUXFAMILY}:${BOARDFAMILY}:${BRANCH}:${line}:${ARCH}"
                  fi
                  done <<< "$FILES"
          done | sort | uniq | sort -u -t: -k1,3 )
          echo "${MATRIX}" |sed '/^$/d' > changes
          
      - name: Upload changes
        uses: actions/upload-artifact@v3
        with:
          path: changes
          name: changes
          if-no-files-found: ignore