action.yml

name: "Free Disk Space (Ubuntu)"
description: "A configurable GitHub Action to free up disk space on an Ubuntu GitHub Actions runner."

# See: https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#branding
branding:
  icon: "trash-2"
  color: "green"

inputs:
  android:
    description: "Remove Android runtime"
    required: false
    default: "true"
  dotnet:
    description: "Remove .NET runtime"
    required: false
    default: "true"
  haskell:
    description: "Remove Haskell runtime"
    required: false
    default: "true"

  # option inspired by:
  # https://github.com/apache/flink/blob/master/tools/azure-pipelines/free_disk_space.sh
  large-packages:
    description: "Remove large packages"
    required: false
    default: "true"

  # option inspired by:
  # https://github.com/actions/virtual-environments/issues/2875#issuecomment-1163392159
  tool-cache:
    description: "Remove image tool cache"
    required: false
    default: "false"

  swap-storage:
    description: "Remove swap storage"
    required: false
    default: "true"

runs:
  using: "composite"
  steps:
    - shell: bash
      run: |

        # ======
        # MACROS
        # ======

        # macro to print a line of equals
        # (silly but works)
        printSeparationLine() {
          str=${1:=}
          num=${2:-80}
          counter=1
          output=""
          while [ $counter -le $num ]
          do
             output="${output}${str}"
             counter=$((counter+1))
          done
          echo "${output}"
        }

        # macro to compute available space
        # REF: https://unix.stackexchange.com/a/42049/60849
        # REF: https://stackoverflow.com/a/450821/408734
        getAvailableSpace() { echo $(df -a $1 | awk 'NR > 1 {avail+=$4} END {print avail}'); }

        # macro to make Kb human readable (assume the input is Kb)
        # REF: https://unix.stackexchange.com/a/44087/60849
        formatByteCount() { echo $(numfmt --to=iec-i --suffix=B --padding=7 $1'000'); }

        # macro to output saved space
        printSavedSpace() {
          saved=${1}
          title=${2:-}

          echo ""
          printSeparationLine '*' 80
          if [ ! -z "${title}" ]; then
            echo "=> ${title}: Saved $(formatByteCount $saved)"
          else
            echo "=> Saved $(formatByteCount $saved)"
          fi
          printSeparationLine '*' 80
          echo ""
        }

        # macro to print output of dh with caption
        printDH() {
          caption=${1:-}

          printSeparationLine '=' 80
          echo "${caption}"
          echo ""
          echo "$ dh -h /"
          echo ""
          df -h /
          echo "$ dh -a /"
          echo ""
          df -a /
          echo "$ dh -a"
          echo ""
          df -a
          printSeparationLine '=' 80
        }



        # ======
        # SCRIPT
        # ======

        # Display initial disk space stats

        AVAILABLE_INITIAL=$(getAvailableSpace)
        AVAILABLE_ROOT_INITIAL=$(getAvailableSpace '/')

        printDH "BEFORE CLEAN-UP:"
        echo ""


        # Option: Remove Android library

        if [[ ${{ inputs.android }} == 'true' ]]; then
          BEFORE=$(getAvailableSpace)
          
          sudo rm -rf /usr/local/lib/android

          AFTER=$(getAvailableSpace)
          SAVED=$((AFTER-BEFORE))
          printSavedSpace $SAVED "Android library"
        fi

        # Option: Remove .NET runtime

        if [[ ${{ inputs.dotnet }} == 'true' ]]; then
          BEFORE=$(getAvailableSpace)

          # https://github.community/t/bigger-github-hosted-runners-disk-space/17267/11
          sudo rm -rf /usr/share/dotnet
          
          AFTER=$(getAvailableSpace)
          SAVED=$((AFTER-BEFORE))
          printSavedSpace $SAVED ".NET runtime"
        fi

        # Option: Remove Haskell runtime

        if [[ ${{ inputs.haskell }} == 'true' ]]; then
          BEFORE=$(getAvailableSpace)

          sudo rm -rf /opt/ghc
          
          AFTER=$(getAvailableSpace)
          SAVED=$((AFTER-BEFORE))
          printSavedSpace $SAVED "Haskell runtime"
        fi

        # Option: Remove large packages
        # REF: https://github.com/apache/flink/blob/master/tools/azure-pipelines/free_disk_space.sh

        if [[ ${{ inputs.large-packages }} == 'true' ]]; then
          BEFORE=$(getAvailableSpace)

          sudo apt-get remove -y '^dotnet-.*' --fix-missing || true
          sudo apt-get remove -y '^llvm-.*' --fix-missing || true
          sudo apt-get remove -y 'php.*' --fix-missing || true
          sudo apt-get remove -y '^mongodb-.*' --fix-missing || true
          sudo apt-get remove -y '^mysql-.*' --fix-missing || true
          sudo apt-get remove -y azure-cli google-cloud-sdk google-chrome-stable firefox powershell mono-devel libgl1-mesa-dri --fix-missing || true
          sudo apt-get autoremove -y || true
          sudo apt-get clean || true
          
          AFTER=$(getAvailableSpace)
          SAVED=$((AFTER-BEFORE))
          printSavedSpace $SAVED "Large misc. packages"
        fi

        # Option: Remove tool cache
        # REF: https://github.com/actions/virtual-environments/issues/2875#issuecomment-1163392159

        if [[ ${{ inputs.tool-cache }} == 'true' ]]; then
          BEFORE=$(getAvailableSpace)

          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
          
          AFTER=$(getAvailableSpace)
          SAVED=$((AFTER-BEFORE))
          printSavedSpace $SAVED "Tool cache"
        fi

        # Option: Remove Swap storage

        if [[ ${{ inputs.swap-storage }} == 'true' ]]; then
          BEFORE=$(getAvailableSpace)

          sudo swapoff -a
          sudo rm -f /mnt/swapfile
          free -h
          
          AFTER=$(getAvailableSpace)
          SAVED=$((AFTER-BEFORE))
          printSavedSpace $SAVED "Swap storage"
        fi



        # Output saved space statistic

        AVAILABLE_END=$(getAvailableSpace)
        AVAILABLE_ROOT_END=$(getAvailableSpace '/')

        echo ""
        printDH "AFTER CLEAN-UP:"

        echo ""
        echo ""

        echo "/dev/root:"
        printSavedSpace $((AVAILABLE_ROOT_END - AVAILABLE_ROOT_INITIAL))
        echo "overall:"
        printSavedSpace $((AVAILABLE_END - AVAILABLE_INITIAL))