update-mainline-kernel.yml

name: Deploying mainline kernel packages
on:
  schedule:
    - cron: "40 0 * * *" # run at the start of every day
  workflow_dispatch:
concurrency:
  group: ${{ github.ref }}
  cancel-in-progress: true

env:
  public_key: ${{ secrets.PUBLIC }}
  private_key: ${{ secrets.PRIVATE }}

jobs:
  check-sha:
    runs-on: ubuntu-latest
    outputs:
      match_results: ${{ steps.check-shas.outputs.match_results }}
      remote_tag: ${{ steps.check-shas.outputs.remote_tag }}
    steps:
      - name: Checking out repository code
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Download remote commit shas
        id: check-shas
        run: |
          # Download remote sha
          latest_tag=$(curl -s https://api.github.com/repos/eupnea-project/mainline-kernel/releases/latest | jq -r '.tag_name')
          # fail if curl result is empty
          if [[ "$latest_tag" = "null" ]]; then
              echo "latest_tag is empty"
              exit 1
          fi
          
          # Check remote tag against cached one
          match_results=$([[ "$(cat cache/mainline_kernel_tag-cache.txt)" == "$latest_tag" ]] && echo "true" || echo "false")
          echo "match_results=$match_results" >> $GITHUB_OUTPUT
          
          # Add sha to output
          echo "remote_tag=$latest_tag" >> $GITHUB_OUTPUT

  deploy-repo:
    runs-on: ubuntu-latest
    needs: check-sha # needs for the vars from the previous job
    # Only run script when remote sha has changed, aka the results DON'T match
    if: needs.check-sha.outputs.match_results == 'false'
    steps:
      - name: Checking out repository code
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Installing dependencies
        run: sudo apt-get install -y rpm createrepo-c

      - name: Update local tag releases cache file
        run: |
          echo "${{ needs.check-sha.outputs.remote_tag }}" > cache/mainline_kernel_tag-cache.txt

      - name: Bump version in kernel spec file
        run: |
          CURRENT_VERSION=$(sed -n '2p' spec-files/eupnea-mainline-kernel.spec | sed 's/.*://' | xargs) # get current version from spec file
          NEXTVERSION=$(echo ${CURRENT_VERSION} | awk -F. -v OFS=. '{$NF += 1 ; print}') # bump version
          sed -i "2s/.*/Version:    ${NEXTVERSION}/" spec-files/eupnea-mainline-kernel.spec # update version in spec file

      - name: Bump version in modules spec file
        run: |
          CURRENT_VERSION=$(sed -n '2p' spec-files/eupnea-mainline-kernel-modules.spec | sed 's/.*://' | xargs) # get current version from spec file
          NEXTVERSION=$(echo ${CURRENT_VERSION} | awk -F. -v OFS=. '{$NF += 1 ; print}') # bump version
          sed -i "2s/.*/Version:    ${NEXTVERSION}/" spec-files/eupnea-mainline-kernel-modules.spec # update version in spec file

      - name: Bump version in headers spec file
        run: |
          CURRENT_VERSION=$(sed -n '2p' spec-files/eupnea-mainline-kernel-headers.spec | sed 's/.*://' | xargs) # get current version from spec file
          NEXTVERSION=$(echo ${CURRENT_VERSION} | awk -F. -v OFS=. '{$NF += 1 ; print}') # bump version
          sed -i "2s/.*/Version:    ${NEXTVERSION}/" spec-files/eupnea-mainline-kernel-headers.spec # update version in spec file

      - name: Add kernel version to spec files
        run: |
          # download bzImage
          curl --silent -LO https://github.com/eupnea-project/mainline-kernel/releases/latest/download/mainline-bzImage
          KERNEL_VERSION=$(file -bL ./mainline-bzImage | grep -o 'version [^ ]*' | cut -d ' ' -f 2) # get kernel version from bzImage
          sed -i "s/insert_version/$KERNEL_VERSION/g" spec-files/eupnea-mainline-kernel-headers.spec # replace version in spec file
          sed -i "s/insert_version/$KERNEL_VERSION/g" spec-files/eupnea-mainline-kernel-modules.spec # replace version in spec file

      - name: Packing kernel package
        run: rpmbuild -bb spec-files/eupnea-mainline-kernel.spec

      - name: Packing modules package
        run: rpmbuild -bb spec-files/eupnea-mainline-kernel-modules.spec

      - name: Packing headers package
        run: rpmbuild -bb spec-files/eupnea-mainline-kernel-headers.spec

      - name: Downloading old repo
        run: |
          # Download old repo.
          # Exit in case the branch doesn't exist yet
          git clone --branch=gh-pages https://github.com/eupnea-project/rpm-repo /tmp/rpm-repo || exit 0
          
          # Copy util rpms to current directory
          cp -r /tmp/rpm-repo/*.rpm .
          
          # Delete old mainline kernel packages
          rm -rf ./eupnea-mainline-kernel*.rpm
          rm -rf ./eupnea-mainline-kernel-modules*.rpm
          rm -rf ./eupnea-mainline-kernel-headers*.rpm

      - name: Setting up rpm repo
        run: bash create-repo.sh

      - name: Remove kernel version from spec files
        run: |
          KERNEL_VERSION=$(file -bL ./mainline-bzImage | grep -o 'version [^ ]*' | cut -d ' ' -f 2) # get kernel version from bzImage
          sed -i "s/$KERNEL_VERSION/insert_version/g" spec-files/eupnea-mainline-kernel-headers.spec # replace version in spec file
          sed -i "s/$KERNEL_VERSION/insert_version/g" spec-files/eupnea-mainline-kernel-modules.spec # replace version in spec file

      - name: Updating files in main branch
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          # Disable setting repo owner as commit author
          commit_user_name: github-actions[bot]
          commit_user_email: 41898282+github-actions[bot]@users.noreply.github.com
          commit_author: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

          # Optional. Commit message for the created commit.
          # Defaults to "Apply automatic changes"
          commit_message: Update files in main branch
          file_pattern: 'spec-files/eupnea-mainline-kernel.spec spec-files/eupnea-mainline-kernel-modules.spec spec-files/eupnea-mainline-kernel-headers.spec cache/mainline_kernel_tag-cache.txt'

      - name: Deploying system packages
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          # Disable setting repo owner as commit author
          commit_user_name: github-actions[bot]
          commit_user_email: 41898282+github-actions[bot]@users.noreply.github.com
          commit_author: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

          # Optional. Commit message for the created commit.
          # Defaults to "Apply automatic changes"
          commit_message: Deploy mainline kernel package
          branch: gh-pages
          create_branch: true
          # Only include needed files
          file_pattern: 'repodata/* *.rpm eupnea.repo public_key.gpg'
          push_options: '--force'