LemonJS/main.js

/**
 * Created by Aleksey Chichenkov <a.chichenkov@initi.ru> on 1/28/19.
 */

var js_beautify = require("./libs/js-beautifier");
var args = require("./libs/args-parser")(process.argv);
var fs = require("fs");
var exec = require('child_process').exec;

var config;
if(args["c"] !== undefined) {
    config = require("./" + args["c"]);
} else {
    config = require("./config.js");
}

var program_path = config.lemon_bin;
var lemon_flags = config.flags;
var input_path = config.input_path;
var output_path = config.output_path;
var file_name = config.file_name;

var fn_y = file_name + ".y";
var fn_js = file_name + ".js";
var fn_out = file_name + ".out";

var temp_fn_y = "temp_" + "file_name" + ".y";
var temp_fn_js = "temp_" + "file_name" + ".js";
var temp_fn_out = "temp_" + "file_name" + ".out";


var update_parser_y = function () {
    var source_parser_y = fs.readFileSync(input_path + fn_y, "utf8");

    source_parser_y = source_parser_y.replace(/&&.*?REPLACER\{(.*?)\}&&/gm, function (match, file_path, offset, string) {
        return fs.readFileSync("./" + input_path + file_path, "utf8");
    });

    fs.writeFileSync(input_path + temp_fn_y, source_parser_y);
};

var post_process_parser = function () {
    var out_js = fs.readFileSync(input_path + temp_fn_js, "utf8");

    if (args["t"] !== undefined) {
        switch (args["t"]) {
            case "web":
                var header = fs.readFileSync(config.require_templates + "header.tmpl", "utf8");
                var footer = fs.readFileSync(config.require_templates + "footer.tmpl", "utf8");
                out_js = header + "\n" + out_js + "\n" + footer;
                break;
            case "node":
                out_js += "\n\n module.exports = LemonJS;";
                break;
        }
    }

    out_js = js_beautify(out_js, {
        indent_size: 4,
        indent_char: ' ',
        preserve_newlines: true,
        space_after_anon_function: true,
        keep_array_indentation: false,
        braces_on_own_line: false
    });

    if(!fs.existsSync(output_path)){
        fs.mkdirSync(output_path);
    }

    fs.writeFileSync(output_path + fn_js, out_js);

    var temp_parser_out = fs.readFileSync(input_path + temp_fn_out, "utf8");
    fs.writeFileSync(output_path + fn_out, temp_parser_out);
};

var start = function () {
    update_parser_y();

    exec(program_path + " " + input_path + temp_fn_y + " " + lemon_flags, function(err, stdout, stderr) {
        err && console.log("ERROR: ", err);
        err && process.exit(1);

        post_process_parser();

        fs.unlinkSync(input_path + temp_fn_y);
        fs.unlinkSync(input_path + temp_fn_js);
        fs.unlinkSync(input_path + temp_fn_out);
    });
};

start();