name: 'Setup Common Lisp'
author: Alexander Artemenko
description: This action setup Roswell and a Common Lisp implementation plus Qlot for managing virtual environments.

inputs:
  roswell-version:
    description: 'Roswell version to install. If not specified, the latest working version will be used; if "latest", the latest version is used'
    required: false
    default: v23.10.14.114

  asdf-system:
    description: 'ASDF system to install'
    required: false

  asdf-version:
    description: 'ASDF version to install. If not specified, the latest working version will be used; if "latest", the latest version is used'
    required: false
    default: 3.3.5.3

  qlot-version:
    description: 'Qlot version to install. If not specified, the latest working version will be used; if "latest", the latest version is used'
    required: false
    default: 0.11.5

  qlot-no-deps:
    description: 'Make Qlot ignore asd files and their dependencies. This this might be useful in rare cases when your project contains a non-readable asd files such as templates.'
    required: false
    default: false

  qlfile-template:
    description: "Djula template for qlfile. All environment variables are available in it's context"
    required: false

  cache:
    description: 'If true (default), then cache will be created to speedup repeated action runs.'
    required: false
    default: true

  # GitHub does not support anchors in the action
  # and returns error like this:
  #
  # Anchors are not currently supported. Remove the anchor 'roswell-cache-paths'
  #
  # That is why I use "input" variable to not repeat this list in two places
  roswell-cache-paths:
    description: "Internal var. Don't use it."
    required: false
    default: |
      ~/.quicklisp-client-fix
      ~/.roswell
      /usr/local/etc/roswell
      /usr/local/bin/ros
      /usr/local/Cellar/roswell
      /opt/homebrew/bin/ros
      /opt/homebrew/Cellar/roswell

  qlot-cache-paths:
    description: "Internal var. Don't use it."
    required: false
    default: |
      path: |
        qlfile
        qlfile.lock
        ~/.cache/common-lisp/
        .qlot

  cache-suffix:
    description: "Internal var. Don't use it."
    required: false
    default: v9

runs:
  using: composite
  steps:
    - name: Calculate variables
      id: locals
      shell: bash
      run: |
        if [[ '${{ inputs.roswell-version }}' == 'latest' ]]
        then
          echo "windows-package-name=mingw-w64-x86_64-roswell" >> $GITHUB_OUTPUT
        else
          # Strip v prefix from version number
          ROS_VERSION=$(echo ${{ inputs.roswell-version }} | sed 's/v//')
          echo "windows-package-name=mingw-w64-x86_64-roswell=$ROS_VERSION" >> $GITHUB_OUTPUT
        fi

        # echo 'roswell-cache-paths=~/.quicklisp-client-fix\n~/.roswell\n/usr/local/etc/roswell\n/usr/local/bin/ros\n/usr/local/Cellar/roswell' >> $GITHUB_OUTPUT

        echo "current-month=$(date -u '+%Y-%m')" >> $GITHUB_OUTPUT
            
    - if: runner.os == 'Windows'
      uses: msys2/setup-msys2@cc11e9188b693c2b100158c3322424c4cc1dadea #v2.22.0
      with:
        # Msys2 has its own PATH, and the following setting enables standard
        # PATH manipulation expressions like the one shown below, to succeed:
        #
        #    $ echo /usr/local/bin >> $GITHUB_PATH
        path-type: inherit
        platform-check-severity: warn
        # Installing ASDF requires `make`, so let's make sure it's
        # available
        install: >-
          make
          ${{ steps.locals.outputs.windows-package-name }}
        cache: ${{ inputs.cache }}

    - name: Create lispsh
      shell: bash
      run: |
        echo ::group::Set up link to lispsh
        # All the steps below, should work without problems on Linux, Mac OS,
        # and Windows, provided that they are run with the "right" shell
        # parameter, i.e. bash for Linux and Mac OS, and msys2 for Windows.
        #
        # Unfortunately, composite actions do not support getting the shell
        # parameter injected from the parent workflow (read more about this
        # here: https://github.com/actions/runner/issues/835), so the
        # workaround I came up with is:
        #
        # 1. Symlink bash/msys2 to a known location, i.e. lispsh
        # 2. Use lispsh -eo pipefail {0} as shell parameter
        #
        # Pay attention to -eo pipefail options. We need them to exit on the
        # first error. Without this option, Roswell might fail to install the
        # implementation and continue to execute everything with default SBCL.
        #
        # It's not ideal, but the alternative is to duplicate most of the steps
        # below, and have some of them with `shell: bash`, and others with
        # `shell: msys2 {0}`.
        if [[ "$RUNNER_OS" == "Windows" ]]; then
            powershell New-Item -ItemType SymbolicLink -Force \
              -Path  "D:/a/_temp/setup-msys2/lispsh.cmd" \
              -Target "D:/a/_temp/setup-msys2/msys2.cmd"
        else
            sudo ln -sf $(which bash) /usr/local/bin/lispsh
        fi
        echo ::endgroup::
    - name: Set up Environment
      shell: bash
      run: |
        echo ::group::Set up Environment

        if [[ "$RUNNER_OS" == "Windows" ]]; then
            # Roswell internally checks for the MSYSCON env varible to be
            # defined, and when not there, it would go and install msys2 (i.e.
            # `ros install msys2+`) and rely on the `bash` bonary that comes
            # with that installation.
            #
            # All good except that something is not quite working as it should,
            # given that every time Roswell tries to run a `bash` command, it
            # would spit out the following:
            #
            #     Unhandled SIMPLE-ERROR in thread #<SB-THREAD:THREAD "main thread" RUNNING
            #                                         {1005700003}>:
            #       Couldn't execute "C:\\Users\\runneradmin\\.roswell\\impls\\x86-64\\windows\\msys2\\NIL\\usr\\bin\\bash": The system cannot find the file specified.
            #
            #     Backtrace for: #<SB-THREAD:THREAD "main thread" RUNNING {1005700003}>
            #     0: (SB-DEBUG::DEBUGGER-DISABLED-HOOK #<SIMPLE-ERROR "Couldn't execute ~S: ~A" {1004EEA623}> #<unused argument> :QUIT T)
            #     1: (SB-DEBUG::RUN-HOOK SB-EXT:*INVOKE-DEBUGGER-HOOK* #<SIMPLE-ERROR "Couldn't execute ~S: ~A" {1004EEA623}>)
            #     2: (INVOKE-DEBUGGER #<SIMPLE-ERROR "Couldn't execute ~S: ~A" {1004EEA623}>)
            #     3: (ERROR "Couldn't execute ~S: ~A" "C:\\Users\\runneradmin\\.roswell\\impls\\x86-64\\windows\\msys2\\NIL\\usr\\bin\\bash" "The system cannot find the file specified.")
            #     4: (SB-EXT:RUN-PROGRAM "C:\\Users\\runneradmin\\.roswell\\impls\\x86-64\\windows\\msys2\\NIL\\usr\\bin\\bash" ("-lc" "cd \"C:\\\\Users\\\\runneradmin\\\\.roswell\\\\src\\\\asdf-3.3.5.3\\\\\";pwd") :ENV NIL :ENVIRONMENT NIL :WAIT NIL :SEARCH T :INPUT NIL :IF-INPUT-DOES-NOT-EXIST :ERROR :OUTPUT :STREAM :IF-OUTPUT-EXISTS :APPEND :ERROR NIL :IF-ERROR-EXISTS :APPEND :STATUS-HOOK NIL :EXTERNAL-FORMAT :UTF-8 :DIRECTORY NIL :PRESERVE-FDS NIL :ESCAPE-ARGUMENTS T :WINDOW NIL)
            #     5: (UIOP/LAUNCH-PROGRAM:LAUNCH-PROGRAM ("C:\\Users\\runneradmin\\.roswell\\impls\\x86-64\\windows\\msys2\\NIL\\usr\\bin\\bash" "-lc" "cd \"C:\\\\Users\\\\runneradmin\\\\.roswell\\\\src\\\\asdf-3.3.5.3\\\\\";pwd") :INPUT NIL :OUTPUT :STREAM :ERROR-OUTPUT NIL :OUTPUT :STRING)
            #     6: ((LAMBDA (UIOP/RUN-PROGRAM::REDUCED-INPUT UIOP/RUN-PROGRAM::INPUT-ACTIVITY) :IN UIOP/RUN-PROGRAM::%USE-LAUNCH-PROGRAM) NIL NIL)
            #     7: (UIOP/RUN-PROGRAM::%USE-LAUNCH-PROGRAM ("C:\\Users\\runneradmin\\.roswell\\impls\\x86-64\\windows\\msys2\\NIL\\usr\\bin\\bash" "-lc" "cd \"C:\\\\Users\\\\runneradmin\\\\.roswell\\\\src\\\\asdf-3.3.5.3\\\\\";pwd") :OUTPUT :STRING)
            #     8: (MINGW-NAMESTRING #P"C:/Users/runneradmin/.roswell/src/asdf-3.3.5.3/")
            #     9: (ROSWELL.INSTALL.ASDF::ASDF-INSTALL (:TARGET "asdf" :VERSION "3.3.5.3" :VERSION-NOT-SPECIFIED 0 :ARGV NIL))
            #
            # The NIL over there, seems to be the result of evaluating the
            # following form:
            #
            #     (config "msys2.version")
            #
            # Now, I am not sure what's going on with that, but since
            # we got msys2 installed already, I figured it would be easier to
            # tell Roswell about it and ignore all the other installation
            # steps.
            echo MSYSCON=Stop-Roswell-From-Installing-Msys2 >> $GITHUB_ENV

            # Also, for whatever reason Roswell seems to be installing
            # ASDF-system-specific scripts inside .roswell/lisp/quicklisp/bin
            # and not .roswell/bin, so if we want to enable users of this
            # action to directly invoke these scripts, we need to add
            # .roswell/lisp/quicklisp/bin to PATH.
            echo $HOME/.roswell/lisp/quicklisp/bin >> $GITHUB_PATH
        fi
        echo $HOME/.roswell/bin >> $GITHUB_PATH
        echo ::endgroup::

    # TODO: comment for prod
    # - name: Current Env
    #   shell: bash
    #   run: |
    #     echo ::group::Environment
    #     echo "Current dir:"
    #     pwd

    #     echo "Environment Variables:"
    #     env | sort -u
    #     echo ::endgroup::

    # On Windows we dont have such problems with permission.
    # Also we don't have sudo there, so just skip this step
    # on this platform:
    - if: inputs.cache == 'true' && runner.os != 'Windows'
      name: Grant All Perms to Make Roswell Cache Restoring Possible
      shell: lispsh -eo pipefail {0}
      run: |
        sudo mkdir -p /usr/local/etc/roswell
        sudo chown "${USER}" /usr/local/etc/roswell
        # Here the ros binary will be restored:
        sudo chown "${USER}" /usr/local/bin

    - if: inputs.cache == 'true'
      name: Restore Roswell From Cache
      id: roswell-cache-restore
      uses: actions/cache/restore@v4
      with:
        path: ${{ inputs.roswell-cache-paths }}
        key: roswell-${{ inputs.roswell-version }}-${{ steps.locals.outputs.current-month }}-${{ env.cache-name }}-${{ runner.os }}-${{ runner.arch }}-${{ env.LISP }}-${{ inputs.cache-suffix }}

    - if: inputs.cache == 'true' && steps.roswell-cache-restore.outputs.cache-hit == 'true'
      name: Restore Path To Cached Files
      shell: lispsh -eo pipefail {0}
      run: |
        echo $HOME/.roswell/bin >> $GITHUB_PATH
        echo .qlot/bin >> $GITHUB_PATH

        if [[ "$RUNNER_OS" == "Windows" ]]; then
          echo $HOME/.roswell/lisp/quicklisp/bin >> $GITHUB_PATH
        fi


    # Start the piece which results should be cached

    # On Windows we install roswell using Pacman package manager and don't need this step
    - if: (inputs.cache == 'false' || steps.roswell-cache-restore.outputs.cache-hit != 'true') && runner.os != 'Windows'
      name: Install Roswell
      shell: lispsh -eo pipefail {0}
      run: |
        echo ::group::Installing Roswell dependencies

        if [[ "$RUNNER_OS" == "Linux" ]]; then
            sudo apt-get update
            sudo apt-get -y install git build-essential automake libcurl4-openssl-dev
        fi
        if [[ "$RUNNER_OS" == "macOS" ]]; then
            brew install automake autoconf curl
        fi

        echo ::endgroup::

        if [[ "${{ inputs.roswell-version }}" != "latest" ]]; then
            echo ::group::Installing Roswell ${{ inputs.roswell-version }}
            curl -L https://raw.githubusercontent.com/roswell/roswell/${{ inputs.roswell-version }}/scripts/install-for-ci.sh | bash -xeo pipefail
        else
            echo ::group::Installing latest Roswell
            curl -L https://raw.githubusercontent.com/roswell/roswell/master/scripts/install-for-ci.sh | bash -xeo pipefail
        fi

        echo ::endgroup::
        
    - if: inputs.cache == 'false' || steps.roswell-cache-restore.outputs.cache-hit != 'true'
      name: Upgrade Quicklisp dists
      shell: lispsh -eo pipefail {0}
      run: |
        # The parent workflow might have caching enabled for Roswell and all
        # the other Lisp files in general, so it's better to tell Quicklisp
        # to update all its dists.
        ros -e "(ql:update-all-dists :prompt nil)"
        
    - if: inputs.cache == 'false' || steps.roswell-cache-restore.outputs.cache-hit != 'true'
      name: Install Quicklisp patch for package-inferred systems
      shell: lispsh -eo pipefail {0}
      run: |
        git clone \
            --no-tags \
            --single-branch \
            --depth=1  \
            https://github.com/40ants/quicklisp-client-fix \
            ~/.quicklisp-client-fix

        mkdir -p ~/.roswell

        cat $GITHUB_ACTION_PATH/load-quicklisp-fix.lisp >> ~/.roswell/init.lisp
       
    - if: inputs.cache == 'false' || steps.roswell-cache-restore.outputs.cache-hit != 'true'
      name: Upgrade ASDF to the Latest Version
      shell: lispsh -eo pipefail {0}
      run: |
        if [[ "${{ inputs.asdf-version }}" != "latest" ]]; then
            echo ::group::Installing ASDF ${{ inputs.asdf-version }}
            ros install asdf/${{ inputs.asdf-version }}
        else
            echo ::group::Installing latest ASDF
            ros install asdf
        fi
        echo ::endgroup::

    - if: inputs.cache == 'false' || steps.roswell-cache-restore.outputs.cache-hit != 'true'
      name: Install Qlot
      shell: lispsh -eo pipefail {0}
      run: |
        if [[ "${{ inputs.qlot-version }}" != "latest" ]]; then
            echo ::group::Installing Qlot ${{ inputs.qlot-version }}
            ros install fukamachi/qlot/${{ inputs.qlot-version }}
        else
            echo ::group::Installing latest Qlot
            ros install fukamachi/qlot
        fi
        echo .qlot/bin >> $GITHUB_PATH
        echo ::endgroup::

    - if: inputs.cache == 'true' && steps.roswell-cache-restore.outputs.cache-hit != 'true'
      name: Cache Roswell Setup
      id: roswell-cache-save
      uses: actions/cache/save@v4
      with:
        path: ${{ inputs.roswell-cache-paths }}
        key: ${{ steps.roswell-cache-restore.outputs.cache-primary-key }}

    # We really need this step go before cache restore,
    # because it changes qlfile and cache key depends on it.
    - name: Ensure qlfile exists
      shell: lispsh -eo pipefail {0}
      run: |
        echo ::group::Ensure qlfile exists

        if [[ -n "${{ inputs.qlfile-template }}" ]]; then
            echo "${{ inputs.qlfile-template }}" | $GITHUB_ACTION_PATH/templater.ros > qlfile
            rm -f qlfile.lock
            
            echo "Created qlfile:"
            echo '==============='
            cat qlfile
            echo '==============='
            echo ''
        elif [[ -e qlfile ]]; then
            echo 'Here is content of qlfile:'
            echo '==============='
            cat qlfile
            echo '==============='
            echo ''
        else
            echo 'There is no qlfile. Creating an empty one.'
            touch qlfile
        fi
            
        echo ::endgroup::

    - if: inputs.cache == 'true'
      name: Restore Qlot Environment
      id: qlot-cache-restore
      uses: actions/cache/restore@v4
      with:
        path: ${{ inputs.qlot-cache-paths }}
        key: qlot-${{ steps.locals.outputs.current-month }}-${{ env.cache-name }}-${{ runner.os }}-${{ runner.arch }}-${{ env.QUICKLISP_DIST }}-${{ env.LISP }}-${{ hashFiles('qlfile', 'qlfile.lock', '*.asd') }}-${{ inputs.cache-suffix }}

    - if: inputs.cache == 'true' && steps.qlot-cache-restore.outputs.cache-hit == 'true'
      name: Restore Path To .qlot/bin
      shell: lispsh -eo pipefail {0}
      run: |
        echo .qlot/bin >> $GITHUB_PATH

    - if: inputs.cache == 'false' || steps.qlot-cache-restore.outputs.cache-hit != 'true'
      name: Create Qlot Environment
      shell: lispsh -eo pipefail {0}
      run: |
        echo ::group::Create Qlot Environment
        if [[ "${{ inputs.qlot-no-deps }}" != 'false' ]]; then
          echo 'Running Qlot with --no-deps argument'
          qlot install --no-deps
        else
          echo 'Running Qlot as usual'
          qlot install
        fi
        echo ::endgroup::
      env:
        QLFILE_TEMPLATE: ${{ inputs.qlfile-template }}

    # This step will install system and
    # all possible roswell scripts, if the system
    # has them in the roswell/ subdirectory:
    - if: inputs.asdf-system && (inputs.cache == 'false' || steps.qlot-cache-restore.outputs.cache-hit != 'true')
      name: Install ASDF System
      shell: lispsh -eo pipefail {0}
      # Here we'll need to set CL_SOURCE_REGISTRY
      # when will switch to a new qlot:
      run: |
        echo ::group::Install ASDF System

        qlot exec ros install ${{ inputs.asdf-system }}
            
        echo ::endgroup::

    - if: inputs.cache == 'true' && steps.qlot-cache-restore.outputs.cache-hit != 'true'
      name: Cache Qlot Environment
      id: qlot-cache-save
      uses: actions/cache/save@v4
      with:
        path: ${{ inputs.qlot-cache-paths }}
        key: ${{ steps.qlot-cache-restore.outputs.cache-primary-key }}

    # End of the cached piece

    - name: Check it is possible to run desired lisp implementation
      shell: lispsh -eo pipefail {0}
      # Call ${{ github.action_path }}test.ros does not work on windows
      # because of backslashes.
      #
      # Here we are using sed to transform slashes in the path.
      # Without this trick it is impossible to run test.ros on Windows.
      # 
      # The other way to do the trick is to change write path to GITHUB_PATH.
      # In this case, GitHub itself will convert backslashes. Hovewer, this
      # way the path will be added to the PATH variable of the workflow
      # which used setup-lisp and I consider this is not desired behaviour.
      run: |
        echo ::group::Checking if we installed correct Lisp implementation
        
        if [[ "$RUNNER_OS" == "Windows" ]]; then
            ACTION_PATH="$(echo '${{ github.action_path }}' | sed -e 's|/|\\|')\\"
        else
            ACTION_PATH='${{ github.action_path }}/'
        fi
        
        ${ACTION_PATH}test.ros

        echo ::endgroup::