name: Nix build and commit

on:
  pull_request:
    types: [opened, synchronize, reopened]
  workflow_dispatch:

permissions:
  contents: write

jobs:
  build_and_commit:
    runs-on: docker-builder-01
    steps:
      - name: Show disk usage
        run: df -h

      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          lfs: true
          ref: ${{ github.head_ref || github.ref }}

      - name: Install Nix
        uses: cachix/install-nix-action@v31

      - name: Setup huggingface cachix
        uses: cachix/cachix-action@v15
        with:
          name: huggingface

      - name: Clean build directory
        run: |
            rm -rf build

      - name: Build with Nix
        run: |
            nix run .#build-and-copy \
                --override-input kernel-builder github:huggingface/kernel-builder \
                --max-jobs 8 \
                -j 8 \
                -L

      - name: List built binaries
        run: |
          ls build

      - name: Commit build artifact
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add build/*
          git commit -m "Add built binary [ci skip]"

      - name: Push changes
        run: |
          git push origin HEAD:"$HEAD_REF"
        env:
          HEAD_REF: ${{ github.head_ref || github.ref }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}