build-kernels.yml

name: Build kernel
on:
  push:
    branches: [ "main" ]
  schedule:
    - cron: "10 0 * * *" # run at the start of every day after configs are updated
  workflow_dispatch:
concurrency:
  group: ${{ github.ref }}
  cancel-in-progress: true

jobs:
  build-kernel-mainline:
    runs-on: ubuntu-latest
    steps:
      - name: Maximizing build space
        uses: easimon/maximize-build-space@master
        with:
          root-reserve-mb: 5120
          swap-size-mb: 1024
          remove-dotnet: 'true'

      - name: Checking out repository code
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Installing dependencies
        run: sudo apt update && sudo apt install -y git build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison binutils dracut

      - name: Building Kernel
        run: bash build.sh mainline

      - name: Uploading as artifact
        uses: actions/upload-artifact@v3
        with:
          name: mainline-kernel
          retention-days: 1
          path: |
            bzImage
            modules.tar.xz
            headers.tar.xz
            initramfs.cpio.xz

  build-kernel-chromeos:
    runs-on: ubuntu-latest
    steps:
      - name: Maximizing build space
        uses: easimon/maximize-build-space@master
        with:
          root-reserve-mb: 5120
          swap-size-mb: 1024
          remove-dotnet: 'true'

      - name: Checking out repository code
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Installing dependencies
        run: sudo apt update && sudo apt install -y git build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison binutils dracut

      - name: Building Kernel
        run: bash build.sh chromeos

      - name: Uploading as artifact
        uses: actions/upload-artifact@v3
        with:
          name: chromeos-kernel
          retention-days: 1
          path: |
            bzImage
            modules.tar.xz
            headers.tar.xz
            initramfs.cpio.xz
  
  build-kernel-noinitramfs:
    runs-on: ubuntu-latest
    steps:
      - name: Maximizing build space
        uses: easimon/maximize-build-space@master
        with:
          root-reserve-mb: 5120
          swap-size-mb: 1024
          remove-dotnet: 'true'

      - name: Checking out repository code
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Installing dependencies
        run: sudo apt update && sudo apt install -y git build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison binutils dracut

      - name: Building Kernel
        run: bash build.sh noinitramfs

      - name: Uploading as artifact
        uses: actions/upload-artifact@v3
        with:
          name: noinitramfs-kernel
          retention-days: 1
          path: |
            bzImage
            modules.tar.xz
            headers.tar.xz
            initramfs.cpio.xz

  create-release:
    runs-on: ubuntu-latest
    needs: [ build-kernel-mainline, build-kernel-chromeos, build-kernel-noinitramfs ]
    steps:
      - name: Checking out repository code
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Deleting old dev release
        uses: cb80/delrel@latest
        with:
          tag: dev-build 

      - name: Generating release tag and setting prerelease + name
        id: tag
        run: |
          message=$(git log -1 --pretty=format:"%s")
          echo "commit_message=$message" >> $GITHUB_OUTPUT

      - name: creating tmp folder
        run: mkdir /tmp/artifacts

      - name: Downloading kernel artifacts
        uses: actions/download-artifact@v3
        with:
          path: /tmp/artifacts/

      - name: Renaming kernel artifacts
        run: |
          # append kernel type to downloaded artifacts
          cd "/tmp/artifacts/mainline-kernel"
          for file in *; do
            if [ -f "$file" ]; then
              mv "$file" "mainline-$file"
            fi
          done
          
          cd "/tmp/artifacts/chromeos-kernel"
          for file in *; do
            if [ -f "$file" ]; then
              mv "$file" "chromeos-$file"
            fi
          done

          cd "/tmp/artifacts/noinitramfs-kernel"
          for file in *; do
            if [ -f "$file" ]; then
              mv "$file" "noinitramfs-$file"
            fi
          done

      - name: Publishing new release
        uses: softprops/action-gh-release@v1
        with:
          tag_name: dev-build
          name: Kernel builds - ${{ steps.tag.outputs.commit_message }}
          prerelease: true
          body: |
            Triggered by ${{ github.sha }} at ${{ github.event.repository.updated_at }}
          files: |
            /tmp/artifacts/*-kernel/*-bzImage
            /tmp/artifacts/*-kernel/*-modules.tar.xz
            /tmp/artifacts/*-kernel/*-headers.tar.xz
            /tmp/artifacts/*-kernel/*-initramfs.cpio.xz