Bootstrap: docker
From: node:20-slim

%labels
    Author SciTeX Writer Project
    Version 1.0.0
    Description Mermaid CLI for diagram generation

%help
    SciTeX Writer - Mermaid Container

    Generates diagrams from Mermaid markup files.

    Usage:
        apptainer build mermaid.sif mermaid.def
        apptainer run mermaid.sif mmdc -i diagram.mmd -o diagram.png

    Or with bind mount:
        apptainer run --bind $(pwd):/workspace mermaid.sif mmdc -i input.mmd -o output.png

%environment
    export PATH=/usr/local/bin:$PATH
    export NODE_OPTIONS="--max-old-space-size=4096"

%post
    # Install dependencies for Puppeteer/Chrome
    apt-get update
    apt-get install -y --no-install-recommends \
        chromium \
        fonts-liberation \
        fonts-noto-cjk \
        fonts-dejavu-core \
        ca-certificates

    # Install mermaid-cli globally
    npm install -g @mermaid-js/mermaid-cli

    # Configure Puppeteer to use system Chromium
    mkdir -p /root/.puppeteerrc
    echo '{"executablePath": "/usr/bin/chromium"}' > /root/.puppeteerrc

    # Clean up
    apt-get clean
    rm -rf /var/lib/apt/lists/*
    npm cache clean --force

%runscript
    if [ $# -eq 0 ]; then
        exec mmdc --help
    else
        exec "$@"
    fi

%test
    command -v mmdc || exit 1
    mmdc --version
    echo "Mermaid CLI available"