action.yml

name: Setup cabal-cache for S3
description: Setup cabal-cache to store Haskell packages cache on S3

inputs:
  awsKey:
    description: 'AWS Access Key ID'
    required: true
  awsSecretKey:
    description: 'AWS Secret Key'
    required: true
  awsRegion:
    description: 'AWS Region'
    required: true
  archiveUri:
    description: 'Archive URI in form of "s3://bucket/path"'
    required: true
  cabalStorePath:
    description: 'Path to local cabal store'
    required: true
  threadsNum:
    description: 'Number of threads concurrently uploading to S3'
    required: false
    default: "4"

branding:
  icon: archive
  color: green

runs:
  using: "composite"
  steps:
    - name: Downloading cabal-cache
      shell: bash
      env:
        CI_TEMP: ${{runner.temp}}
      run: |
        export CI_TEMP="$(echo "/$CI_TEMP" | sed 's/\\/\//g' | sed 's/://')"
        export LOCAL_BIN="$HOME/.local/bin"
        mkdir -p "$LOCAL_BIN"

        if [[ ! ":$PATH:" == *":$HOME/.cabal/bin:"* ]]; then
          export PATH="$LOCAL_BIN:$PATH"
          echo "PATH=$LOCAL_BIN:$PATH" >> $GITHUB_ENV
        fi

        if ! command -v cabal-cache &> /dev/null; then
          case "${{runner.os}}" in
            Linux)    CI_OS=linux   ;;
            Windows)  CI_OS=nt      ;;
            macOS)    CI_OS=osx     ;;
            *)        echo "Unsupported OS: ${{ runner.os }}"; exit 1;;
          esac

          echo "Downloading from https://dl.haskellworks.io/binaries/cabal-cache/cabal-cache_x86_64_${CI_OS}.tar.gz"
          curl -L "https://dl.haskellworks.io/binaries/cabal-cache/cabal-cache_x86_64_${CI_OS}.tar.gz" \
            -o "$CI_TEMP/cabal-cache.tar.gz"
          tar zxvf "$CI_TEMP/cabal-cache.tar.gz" -C "$LOCAL_BIN"
        fi
        
    - name: Configure environment
      shell: bash
      run: |
        echo '_CABAL_CACHE_AWS_ACCESS_KEY_ID__="${{ inputs.awsKey }}"' >> $GITHUB_ENV
        echo '_CABAL_CACHE_AWS_SECRET_ACCESS_KEY__="${{ inputs.awsSecretKey }}"' >> $GITHUB_ENV
        echo '_CABAL_CACHE_ARCHIVE_URI__="${{ inputs.archiveUri }}"' >> $GITHUB_ENV
        
        cat $GITHUB_ENV

    - name: Configure scripts
      shell: bash
      run: |
        cat <<EOF > $HOME/.local/bin/cabal-cache-op
        #!/usr/bin/env bash

        CMD=\$1

        export AWS_ACCESS_KEY_ID="\$_CABAL_CACHE_AWS_ACCESS_KEY_ID__"
        export AWS_SECRET_ACCESS_KEY="\$_CABAL_CACHE_AWS_SECRET_ACCESS_KEY__"

        cabal-cache \$CMD \
          --threads ${{ inputs.threadsNum }} \
          --archive-uri \$_CABAL_CACHE_ARCHIVE_URI__ \
          --region ${{ inputs.awsRegion }} \
          --store-path "${{ inputs.cabalStorePath }}"

        EOF

        cat <<EOF >> $HOME/.local/bin/cabal-cache-store
        #!/usr/bin/env bash

        cabal-cache-op sync-to-archive
        EOF

        cat <<EOF >> $HOME/.local/bin/cabal-cache-restore
        #!/usr/bin/env bash

        cabal-cache-op sync-from-archive
        EOF

        chmod +x $HOME/.local/bin/cabal-cache-op
        chmod +x $HOME/.local/bin/cabal-cache-store
        chmod +x $HOME/.local/bin/cabal-cache-restore