apg-js-examples
Version:
Examples of using the suite of apg-js applications and libraries.
65 lines (63 loc) • 2.5 kB
JavaScript
/* *************************************************************************************
* copyright: Copyright (c) 2021 Lowell D. Thomas, all rights reserved
* license: BSD-2-Clause (https://opensource.org/licenses/BSD-2-Clause)
* ********************************************************************************* */
// Driver for the ini-file example.
module.exports = function main(args) {
/* display the program arguments */
console.log('ini-file args');
console.dir(args);
/* the help screen */
let desc = '';
desc += 'The "ini-file" example is a "real world" demonstration of how apg-exp might\n';
desc += 'be used to process an initialization file, the common "ini" format.\n';
desc +=
'Examine or run a debugger on this module, "apg-js-examples/src/back-reference/main.js" to study the example.\n';
let help = '';
help += 'Usage: npm run ini-file [-- arg]\n';
help += ' arg: help (or no arg) to display this help screen.\n';
help += ' bad-input demonstration with a poorly-formed ini file\n';
help += ' basic demonstration of a basic parsing of an ini file\n';
help += ' trace demonstrate the tracing of the parse tree while parsing and ini file\n';
help += ' all run all demonstrations\n';
if (!args[0]) {
/* display the help screen and exit */
console.log(desc);
console.log(help);
return;
}
switch (args[0]) {
case 'help':
console.log(help);
return;
case 'bad-input':
console.log();
console.log('Demonstrate parsing an INI file with bad input.');
require('./bad-input');
break;
case 'basic':
console.log();
console.log('Demonstrate the basic parsing parsing of an INI file.');
require('./basic');
break;
case 'trace':
console.log();
console.log('Demonstrate tracing the parsing of an INI file.');
require('./trace');
break;
case 'all':
console.log();
console.log('Demonstrate parsing an INI file with bad input.');
require('./bad-input');
console.log();
console.log('Demonstrate the basic parsing parsing of an INI file.');
require('./basic');
console.log();
console.log('Demonstrate tracing the parsing of an INI file.');
require('./trace');
break;
default:
console.log(`unrecognized argument: ${args[0]}`);
console.log(help);
}
};