action.yml

name: 'Create AppImage'
description: 'Creates an AppImage from binaries and resources'
inputs:
  app-name:
    description: 'Name of the application'
    required: true
  app-version:
    description: 'Version of the application'
    required: true
  app-icon-name:
    description: 'Name of the icon file (no extension)'
    required: true
  app-categories:
    description: 'Comma-separated list of categories'
    required: true
  bin-paths:
    description: 'Comma-separated paths to the binaries'
    required: true
  lib-paths:
    description: 'Comma-separated paths to the libraries'
    required: true
  share-paths:
    description: 'Comma-separated paths to the shared resources'
    required: true
  appdir-paths:
    description: 'Comma-separated paths to other resources that go into the AppDir'
    required: true
  output-path:
    description: 'Path to the output AppImage'
    required: true
  

runs:
  using: 'composite'
  steps:

    - name: Install dependencies
      shell: bash
      run: sudo apt-get install --assume-yes --quiet=2 libfuse2 appstream

    - name: Create AppDir structure
      shell: bash
      run: |
        mkdir -p build/AppDir/usr/bin
        mkdir -p build/AppDir/usr/lib
        mkdir -p build/AppDir/usr/share

        copy_files_to_appdir() {
          local IFS=$'\n'
          local FILES_TO_COPY=($(echo "$1" | tr ',' '\n'))
          for file in "${FILES_TO_COPY[@]}"; do 
            cp -r "$file" "$2"
          done
        }
        
        set -e
        copy_files_to_appdir "${{ inputs.bin-paths }}" "build/AppDir/usr/bin"
        copy_files_to_appdir "${{ inputs.lib-paths }}" "build/AppDir/usr/lib"
        copy_files_to_appdir "${{ inputs.share-paths }}" "build/AppDir/usr/share"
        copy_files_to_appdir "${{ inputs.appdir-paths }}" "build/AppDir/"

    - name: Create Desktop file
      shell: bash
      run: |
        cat << EOF > build/AppDir/${{ inputs.app-name }}.desktop
        [Desktop Entry]
        Name=${{ inputs.app-name }}
        Exec=${{ inputs.app-name }}
        Icon=${{ inputs.app-icon-name }}
        Type=Application
        Categories=${{ inputs.app-categories }}
        X-AppImage-Name=${{ inputs.app-name }}
        X-AppImage-Version=${{ inputs.app-version }}
        X-AppImage-Arch=x86-64
        EOF
        chmod a+x build/AppDir/${{ inputs.app-name }}.desktop

    - name: Create AppRun file
      shell: bash
      run: |
        cat << EOF > build/AppDir/AppRun
        #!/bin/bash
        
        HERE="\$(dirname "\$(readlink -f "\${0}")")"
        export HERE
        cd "\${HERE}/usr/bin"
        exec "./${{ inputs.app-name }}"
        EOF
        chmod a+x build/AppDir/AppRun   

    - name: Debug output
      run: |
        tree build
        echo Desktop:
        cat build/AppDir/${{ inputs.app-name }}.desktop
        echo
        echo AppRun:
        cat build/AppDir/AppRun
      shell: bash

    - name: Create AppImage
      shell: bash
      run: |
        wget "https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage" \
          --directory-prefix build \
          --quiet

        chmod a+x build/appimagetool-x86_64.AppImage
        ARCH=x86_64 ./build/appimagetool-x86_64.AppImage ./build/AppDir
        DIR=$(dirname "${{ inputs.output-path }}")
        mkdir --parents "${DIR}"
        mv "${{ inputs.app-name }}-x86_64.AppImage" "${{ inputs.output-path }}"