name: Dump local wheels
description: scan local env and dump needed wheels

inputs:
  torch-url:
    description: path to the PyTorch downloads
    required: false
    default: "https://download.pytorch.org/whl/cpu/torch_stable.html"
  wheel-dir:
    description: local path for export wheels
    required: false
    default: "_pip-wheels/"
  cache-key:
    description: update this cache
    required: false
    default: "pypi_wheels"

runs:
  using: "composite"
  steps:
    - name: install dev. env
      run: pip install -r requirements/ci.txt
      shell: bash

    - name: Freeze local emv.
      run: |
        pip freeze > requirements.dump
        cat requirements.dump
      shell: bash

    - name: Filter self pkg
      run: |
        import os
        fp = 'requirements.dump'
        with open(fp) as fopen:
          lines = [ln.strip() for ln in fopen.readlines()]
        # prevent collisions with version appendix
        lines = [ln.split('+')[0] for ln in lines if '-e ' not in ln]
        # drop sphinx theme package
        lines = [ln for ln in lines if 'sphinx-theme' not in ln]
        with open(fp, 'w') as fopen:
          fopen.writelines([ln + os.linesep for ln in lines])
      shell: python

    - name: Dump wheels
      run: |
        # cat requirements.dump
        pip wheel -r requirements.dump --prefer-binary \
          --wheel-dir=.wheels \
          -f ${{ inputs.torch-url }} -f ${{ inputs.wheel-dir }}
        ls -lh .wheels/
      shell: bash

    - name: Find diff
      id: wheels-diff
      run: |
        import os, glob
        wheels = [os.path.basename(p) for p in glob.glob(".wheels/*")]
        pkgs = [os.path.basename(p) for p in glob.glob("${{ inputs.wheel-dir }}/*")]
        diff = [w for w in wheels if w not in pkgs]
        print(diff)
        with open(os.environ['GITHUB_OUTPUT'], 'a') as fh:
            print(f'count-new={len(diff)}', file=fh)
      shell: python

    - name: Cache pull
      if: ${{ steps.wheels-diff.outputs.count-new != 0 }}
      uses: actions/cache/restore@v3
      with:
        path: ${{ inputs.wheel-dir }}
        key: ${{ inputs.cache-key }}

    - run: cp .wheels/* ${{ inputs.wheel-dir }}
      if: ${{ steps.wheels-diff.outputs.count-new != 0 }}
      shell: bash

    - name: Cache push
      if: ${{ steps.wheels-diff.outputs.count-new != 0 }}
      uses: actions/cache/save@v3
      with:
        path: ${{ inputs.wheel-dir }}
        key: ${{ inputs.cache-key }}