erasmus/dist/cli.js

A simple tool for literate programming

#!/usr/bin/env node
"use strict";
var path_1 = require('path');
var fs_1 = require('fs');
var erasmus_1 = require('./erasmus');
function exit(error) {
    var code;
    if (error) {
        code = -1;
        console.error(error instanceof Error ? error.message : error);
    }
    else {
        code = 0;
    }
    process.exit(code);
}
// The module is not being invoked directly
if (require.main !== module) {
    console.error(path_1.basename(__filename) + " can only be invoked as a command.");
    process.exit(-1);
}
var encoding = "utf8";
var output = process.stdout;
var _a = process.argv, option = _a[2];
var input = undefined;
var message = "Could not continue.";
switch (option) {
    case undefined:
    case "-h":
    case "--help":
        message = "Usage: erasmus FILE";
        break;
    case "-p":
    case "--pipe":
        input = process.stdin;
        break;
    default:
        if (fs_1.existsSync(option) && fs_1.statSync(option).isFile()) {
            input = fs_1.createReadStream(option);
        }
        else {
            message = "Could not open " + option + ".";
        }
}
if (input == undefined) {
    exit(message);
}
else {
    var extractor = new erasmus_1.CodeExtractor({ encoding: "utf-8" });
    input.on("error", exit);
    input.setEncoding(encoding);
    input.pipe(extractor).pipe(output);
}