parameters:
    llvmBuildAssetName: ''
    llvmVersion: ''

steps:
  # Download the LLVM build from the GitHub releases for https://github.com/WAVM/WAVM-LLVM/
  # The Azure Pipelines DownloadGithubRelease task requires a service connection, which don't work
  # when building pull requests.
  # Instead, just use wget/curl to download the release. Unfortunately, the Windows agent doesn't
  # wget, and the CentOS 7.0 builder has a version of curl with a https bug that makes it unusable.
  - script: curl --retry 5 -L -o ${{parameters.llvmBuildAssetName}}.zip https://github.com/WAVM/WAVM-LLVM/releases/download/${{parameters.llvmVersion}}/${{parameters.llvmBuildAssetName}}.zip
    displayName: Download LLVM build (Windows)
    workingDirectory: $(Pipeline.Workspace)
    condition: eq(variables['Agent.OS'], 'Windows_NT')

  - script: wget https://github.com/WAVM/WAVM-LLVM/releases/download/${{parameters.llvmVersion}}/${{parameters.llvmBuildAssetName}}.zip
    displayName: Download LLVM build (non-Windows)
    workingDirectory: $(Pipeline.Workspace)
    condition: ne(variables['Agent.OS'], 'Windows_NT')

  # Extract the LLVM build from the ZIP file downloaded from GitHub.
  - task: ExtractFiles@1
    displayName: Extract LLVM Build
    inputs:
      archiveFilePatterns: $(Pipeline.Workspace)/${{parameters.llvmBuildAssetName}}.*
      destinationFolder: $(Build.ArtifactStagingDirectory)/llvm
      cleanDestinationFolder: false