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