# example:
#       - uses: ./.github/actions/get-llvm
#         with:
#           target: x86_64-unknown-linux-gnu

name: "Download LLVM"
inputs:
  target:
    required: true

runs:
  using: "composite"
  steps:
    - name: find asset
      id: find
      uses: actions/github-script@v7
      env:
        target: ${{ inputs.target }}
      with:
        result-encoding: string
        script: |
          let page = 1;
          let releases = [];

          let releasePrefix = "llvm-"
          let target = process.env.target

          do {
            const res = await github.rest.repos.listReleases({
              owner: context.repo.owner,
              repo: context.repo.repo,
              per_page: 50,
              page,
            });

            releases = res.data
            releases.sort((a, b) => {
              return (a.published_at < b.published_at) ? 1 : ((a.published_at > b.published_at) ? -1 : 0);
            });

            let llvmLatestRelease = releases.find(release => {
              return release.tag_name.startsWith(releasePrefix);
            });
            if (llvmLatestRelease){
                let asset = llvmLatestRelease.assets.find(asset =>{
                    return asset.name.includes(target);
                });
                if (!asset){
                  core.setFailed(`Artifact for '${target}' not found in release ${llvmLatestRelease.tag_name} (${llvmLatestRelease.html_url})`);
                  process.exit();
                }
                return asset.browser_download_url;
            }

            page++;
          } while(releases.length > 0);

          core.setFailed(`No LLVM releases with '${releasePrefix}' atifacts found! Please release LLVM before running this workflow.`);
          process.exit();

    - name: download
      shell: bash
      run: |
        curl -sSLo llvm.tar.gz ${{ steps.find.outputs.result }}

    - name: unpack
      shell: bash
      run: |
        tar -xf llvm.tar.gz
        rm llvm.tar.gz