name: 'Maximize build disk space'
description: 'Maximize the available disk space by removing unneeded software'

inputs:
  purge-packages:
    description: whether to remove apt packages
    required: false
    default: 'false'
  apt-manifest-url:
    description: url to apt-package manifest (default ubuntu-22.04.4)
    required: false
    default: 'https://releases.ubuntu.com/jammy/ubuntu-22.04.4-live-server-amd64.manifest'

runs:
  using: "composite"
  steps:
    - name: Disk space report before modification
      shell: bash
      run: |
          echo "==> Available space before cleanup"
          echo
          df -h

    - name: Maximize build disk space
      shell: bash
      run: |
          set -euo pipefail

          non_manifest_packages() {
            comm -2 -3 \
              <(sudo apt-mark showmanual | sort) \
              <(curl --silent "${{ inputs.apt-manifest-url }}" | grep --perl-regexp --only-matching '^[\w-.+]+' | sort)
          }

          echo "Removing unwanted software... "

          if [[ "${{ inputs.purge-packages }}" == 'true' ]]; then
            # sudo apt-get purge \
            #   --allow-remove-essential \
            #   $(non_manifest_packages) # > /dev/null
            # Remove all packages that are not required by the base system:
            sudo apt-get remove $(comm -23 <(apt-mark showmanual | sort -u) <(gzip -dc /var/log/installer/initial-status.gz | sed -n 's/^Package: //p' | sort -u))
          fi


          sudo rm -rf \
            /var/lib/docker/ \
            "$AGENT_TOOLSDIRECTORY" \
            /opt \
            /usr/local/** &

          # nix flake update wants to find git-core templates
          # /usr/share/git-core/templates
          # /usr/share/**
          {
            sudo swapoff -a
            sudo rm -f /mnt/swapfile
          } &
          wait
          echo "... done"

    - name: Disk space report after modification
      shell: bash
      run: |
          echo "==> Available space after cleanup"
          echo
          df -h