GenerateImagesFromSrc.yml

name: GenerateImagesFromSrc

on:
  push:
    branches: 
    - '**'
    paths: 
    - 'src/plantuml/**'
    - 'src/drawio/**'

  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v3

      # Installs Java distribution for running the plantUML jar
      - name: Install Java
        uses: actions/setup-java@v3
        with:
          distribution: 'temurin'
          java-version: '11'
          check-latest: true
      
      # Install graphviz for plantuml     
      - name: Setup Graphviz
        uses: ts-graphviz/setup-graphviz@v1
      
      # Download plantUML jar 
      - name: Download plantuml file
        run: |
          wget -O plantuml.jar "https://github.com/plantuml/plantuml/releases/download/v1.2023.10/plantuml-1.2023.10.jar" 
                                
      # Runs a single command using the runners shell
      - name: Generate images
        run: |
          imagedir=images/diagrams
          mkdir -p $imagedir
          rm -rf images/diagrams/*
          for fullname in $(find src/plantuml/ -type f -name '*.puml')
          do
              echo "Fullname: ${fullname}"
              base=$(basename "${fullname}" .puml)
              dir=$(dirname $fullname)
              echo "Basename: ${base}"
              outdir=$(dirname $fullname | sed s+src/plantuml+${imagedir}+)
              echo "Outdir: ${outdir}"
              mkdir -p $outdir
              plantoutdir="${PWD}/${outdir}"
              echo "PlantOutdir: ${plantoutdir}"
              
              # PlantUML arguments:
              # -v for verbose output (Debugging)
              # -checkmetadata checks whether the target png/svg has the same source
              # and if there are no changes, doesn't regenerate the image file
              # -o sets the output folder for the png/svg files
              plantargs="-v -checkmetadata -o ${plantoutdir} ${fullname}"
              
              # separate calls are needed, because only one file type can be set
              # per call
              java -jar plantuml.jar -tpng ${plantargs} 
              java -jar plantuml.jar -tsvg ${plantargs}

              # method with pipes
              #cat "${fullname}" | java -jar plantuml.jar -p -tpng -checkmetadata  > "${outdir}/${base}.png"
              #cat "${fullname}" | java -jar plantuml.jar -p -tsvg -checkmetadata  > "${outdir}/${base}.svg"
          done
          tree ./images
      
      # creates png files from draw io image files
      - name: Export drawio files as png
        uses: rlespinasse/drawio-export-action@v2
        with:
          path: ./src/drawio/ 
          output: .
          format: png
          action-mode: all

      # creates svg files from draw io image files
      - name: Export drawio files 
        uses: rlespinasse/drawio-export-action@v2
        with:
          path: ./src/drawio/ 
          output: .
          format: svg
          action-mode: all

      # copies the created png & svg files to the images/diagrams folder and deletes the drawio files
      - name: Copy draw io
        run: |
          imagedir=images/diagrams
          cp -RT ./src/drawio $imagedir
          find $imagedir -name '*.drawio' -exec rm -rv {} \;
          tree ./images
      
      # add and commit the new generated files
      - name: Add & Commit
        uses: EndBug/add-and-commit@v9
        with:
          add: 'images/diagrams/'