action.yml

name: 'Setup LFS'
description: 'Pull LFS repositories and caches them'

inputs:
  refdata-repo:
    description: "tardis refdata repository"
    required: false
    default: 'tardis-sn/tardis-refdata'
  regression-data-repo: 
    description: "tardis regression data repository"
    required: false
    default: 'tardis-sn/tardis-regression-data'

runs:
    using: "composite"
    steps:
      - name: Clone Refdata Repo
        uses: actions/checkout@v4
        with:
          repository: ${{ inputs.refdata-repo }}
          path: tardis-refdata
          lfs: false

      - name: Create LFS file list
        run: git lfs ls-files -l | cut -d' ' -f1 | sort > .lfs-assets-id
        working-directory: tardis-refdata
        shell: bash

      - name: Restore LFS cache
        uses: actions/cache/restore@v3
        id: lfs-cache-refdata
        with:
          path: tardis-refdata/.git/lfs
          key: ${{ runner.os }}-lfs-${{ hashFiles('tardis-refdata/.lfs-assets-id') }}-v1

      - name: Git LFS Pull
        run: git lfs pull
        working-directory: tardis-refdata
        if: steps.lfs-cache-refdata.outputs.cache-hit != 'true'
        shell: bash
      
      - name: Git LFS Checkout
        run: git lfs checkout
        working-directory: tardis-refdata
        if: steps.lfs-cache-refdata.outputs.cache-hit == 'true'
        shell: bash
      
      - name: Save LFS cache if not found
        # uses fake ternary 
        # for reference: https://github.com/orgs/community/discussions/26738#discussioncomment-3253176
        if: ${{ steps.lfs-cache-refdata.outputs.cache-hit != 'true'  && always() || false }}
        uses: actions/cache/save@v3
        id: lfs-cache-refdata-save
        with:
          path: tardis-refdata/.git/lfs
          key: ${{ runner.os }}-lfs-${{ hashFiles('tardis-refdata/.lfs-assets-id') }}-v1
      
      - name: Clone tardis-sn/tardis-regression-data
        uses: actions/checkout@v4
        with:
          repository:  ${{ inputs.regression-data-repo }}
          path: tardis-regression-data
      
      - name: Create LFS file list
        run: git lfs ls-files -l | cut -d' ' -f1 | sort > .lfs-assets-id
        working-directory: tardis-regression-data
        shell: bash

      - name: Restore LFS cache
        uses: actions/cache/restore@v3
        id: lfs-cache-regression-data
        with:
          path: tardis-regression-data/.git/lfs
          key: ${{ runner.os }}-lfs-${{ hashFiles('tardis-regression-data/.lfs-assets-id') }}-v1
  
      - name: Git LFS Pull
        run: git lfs pull
        working-directory: tardis-regression-data
        if: steps.lfs-cache-regression-data.outputs.cache-hit != 'true'
        shell: bash
      
      - name: Git LFS Checkout
        run: git lfs checkout
        working-directory: tardis-regression-data
        if: steps.lfs-cache-regression-data.outputs.cache-hit == 'true'
        shell: bash
      
      - name: Save LFS cache if not found
        # uses fake ternary 
        # for reference: https://github.com/orgs/community/discussions/26738#discussioncomment-3253176
        if: ${{ steps.lfs-cache-regression-data.outputs.cache-hit != 'true'  && always() || false }}
        uses: actions/cache/save@v3
        id: lfs-cache-regression-data-save
        with:
          path: tardis-regression-data/.git/lfs
          key: ${{ runner.os }}-lfs-${{ hashFiles('tardis-regression-data/.lfs-assets-id') }}-v1