cobol/lib/compile/index.js

COBOL bridge for NodeJS which allows you to run COBOL code from NodeJS.

"use strict";

// Dependencies

var Which = require("which"),
    Exec = require("child_process").exec,
    OArgv = require("oargv"),
    Path = require("path");

/**
 * CheckCobc
 * Checks if `cobc` exists as executable.
 *
 * @name CheckCobc
 * @function
 * @param {Function} callback The callback function.
 */
var _cobcExists = false;
function CheckCobc(callback) {
    if (_cobcExists) {
        return process.nextTick(function () {
            callback(_cobcExists);
        });
    }
    Which("cobc", function (err) {
        _cobcExists = !err;
        callback(_cobcExists);
    });
}

/**
 * Compile
 * Compiles the cobol file.
 *
 * @name Compile
 * @function
 * @param {String} input The path to the cobol file.
 * @param {Object} options An object containing the following fields:
 * @param {Function} callback The callback function.
 */
function Compile(input, options, callback) {

    var output = Path.join(options.cwd, Path.basename(input).slice(0, -4));

    if (options.precompiled) {
        callback(null, output);
    } else {
        CheckCobc(function (exists) {
            if (!exists) {
                return callback(new Error("Couldn't find the cobc executable in the PATH. Make sure you installed Open Cobol."));
            }

            var args = {
                x: true,
                _: input
            };
            Object.assign(args, options.compileargs);

            Exec(OArgv(args, "cobc"), {
                cwd: options.cwd
            }, function (err, stdout, stderr) {
                if (stderr || err) {
                    return callback(stderr || err);
                }
                callback(null, output);
            });
        });
    }
}

module.exports = Compile;