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#!/usr/bin/env node
// Command-line tool that parses a type expression and dumps a JSON version of the parse tree.
const catharsis = require('../catharsis');
const path = require('path');
const util = require('util');
const command = path.basename(process.argv[1]);
const typeExpression = process.argv[2];
const opts = {
describe: false,
jsdoc: false
};
let parsedType;
function usage() {
console.log(util.format('Usage:\n %s typeExpression [--jsdoc] [--describe]', command));
}
function done(err) {
/* eslint-disable no-process-exit */
process.exit(err === undefined ? 0 : err);
/* eslint-enable no-process-exit */
}
process.argv.slice(3).forEach(arg => {
const parsedArg = arg.replace(/^-{2}/, '');
if (opts[parsedArg] !== undefined) {
opts[parsedArg] = true;
} else {
console.error('Unknown option "%s"', arg);
usage();
done(1);
}
});
if (!typeExpression) {
usage();
done(1);
} else {
try {
parsedType = catharsis.parse(typeExpression, opts);
if (opts.describe) {
parsedType = catharsis.describe(parsedType);
}
} catch (e) {
console.error(util.format('Unable to parse "%s" (exception follows):', typeExpression));
console.error(e.stack || e.message);
done(1);
}
console.log(JSON.stringify(parsedType, null, 2));
done();
}
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