plutostateToJulia.js

function plutostateToJulia(statefile, juliafile) {
    const fakeBind = `macro bind(def, element)
    quote
        local el = \$(esc(element))
        global \$(esc(def)) = Core.applicable(Base.get, el) ? Base.get(el) : missing
        el
    end
end`;

    const _notebook_header = '### A Pluto.jl notebook ###';
    // We use a creative delimiter to avoid accidental use in code
    // so don't get inspired to suddenly use these in your code!
    const _cell_id_delimiter = '# ╔═╡ ';
    const _order_delimiter = '# ╠═';
    const _order_delimiter_folded = '# ╟─';
    const _cell_suffix = '\n\n';

    return new Promise(async (resolve, reject) => {
        const state = await parsePlutostate(statefile);

        const cellOrder = state['cell_order'];
        const cellExecutionOrder = state['cell_execution_order'];
        const cellsDict = Object.fromEntries(Object.entries(state['cell_inputs']).map(([k, v]) => ([k, {
            cellId: k,
            code: v.code,
            codeFolded: v.code_folded
        }])));

        const notebookId = uuid.v4();

        let content = '';
        content += _notebook_header + '\n';
        content += '# 0.14.5\n';  // TODO: Update to dynamic (latest) version
        content += '\n';
        content += 'using Markdown\n';
        content += 'using InteractiveUtils\n';
        // Bind detection
        if(Object.values(cellsDict).filter(c => c.code.includes('@bind')).length > 0) {
            content += '\n';
            content += '# This Pluto notebook uses @bind for interactivity. When running this notebook outside of Pluto, the following \'mock version\' of @bind gives bound variables a default value (instead of an error).\n';
            content += fakeBind + '\n';
        }
        content += '\n';

        for(let cellId of cellExecutionOrder) {
            const cell = cellsDict[cellId];
            content += _cell_id_delimiter + cellId + '\n';
            content += cell.code.replace(_cell_id_delimiter, '# ');
            content += _cell_suffix;
        }

        content += _cell_id_delimiter + 'Cell order:\n';
        for(let cellId of cellOrder) {
            const cell = cellsDict[cellId];
            const delim = cell.codeFolded ? _order_delimiter_folded : _order_delimiter
            content += delim + cellId + '\n';
        }

        fs.writeFile(juliafile, content, err => {
            if(err) reject(err);
            else {
                resolve();
            }
        });
    });
}