release.yml

name: release
on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
  workflow_dispatch:

permissions:
  contents: write # Fetch code (actions/checkout), create release
  packages: write # Upload and publish packages to GitHub Packages

jobs:
  build:
    runs-on: ubuntu-latest
    if: ${{ github.repository == 'mixxxdj/demucs' || github.event_name == 'workflow_dispatch' }}
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
    - uses: actions/setup-python@v5
      with:
        python-version: 3.13

    - uses: actions/cache@v4
      with:
        path: env
        key: build-${{ hashFiles('**/requirements.txt') }}

    - run: |
        set -eo pipefail
        echo "VERSION=$(git describe --tags --match "v*" --exclude "*-onnxmodel")-onnxmodel" >> "${GITHUB_ENV}"
      name: "Prepare"

    - run: |
        python3 -m venv env
        . env/bin/activate
        pip install .
        pip install onnx onnxruntime
        ./scripts/convert-pth-to-onnx.py ./output
      name: Build

    - run: |
        if ! gh release view --repo "${{ github.repository }}" "${RELEASE_NAME}" &> /dev/null
        then 
          gh release create --repo "${{ github.repository }}" "${RELEASE_NAME}" \
            --generate-notes \
            --latest \
            --target "${{ github.sha }}"
          gh release upload --repo "${{ github.repository }}" "${RELEASE_NAME}" output/htdemucs.onnx
        fi
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        RELEASE_NAME: ${{ env.VERSION }}
      shell: bash
      if: ${{ github.event_name == 'push' }}
      id: ghrelease
      name: "Creates a release in GitHub if it doesn't exist yet"

    - name: Upload GitHub Actions artifacts
      if: ${{ steps.ghrelease.outcome == 'skipped' }}
      uses: actions/upload-artifact@v4
      with:
        name: htdemucs.onnx
        path: |
          ./output/htdemucs.onnx