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139 linhas
4.8 KiB
139 linhas
4.8 KiB
#!/usr/bin/env node
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/*
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Copyright JS Foundation and other contributors, https://js.foundation/
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*jslint sloppy:true node:true rhino:true */
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var fs, esprima, fname, forceFile, content, options, syntax;
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if (typeof require === 'function') {
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fs = require('fs');
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try {
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esprima = require('esprima');
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} catch (e) {
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esprima = require('../');
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}
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} else if (typeof load === 'function') {
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try {
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load('esprima.js');
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} catch (e) {
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load('../esprima.js');
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}
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}
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// Shims to Node.js objects when running under Rhino.
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if (typeof console === 'undefined' && typeof process === 'undefined') {
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console = { log: print };
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fs = { readFileSync: readFile };
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process = { argv: arguments, exit: quit };
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process.argv.unshift('esparse.js');
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process.argv.unshift('rhino');
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}
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function showUsage() {
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console.log('Usage:');
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console.log(' esparse [options] [file.js]');
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console.log();
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console.log('Available options:');
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console.log();
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console.log(' --comment Gather all line and block comments in an array');
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console.log(' --loc Include line-column location info for each syntax node');
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console.log(' --range Include index-based range for each syntax node');
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console.log(' --raw Display the raw value of literals');
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console.log(' --tokens List all tokens in an array');
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console.log(' --tolerant Tolerate errors on a best-effort basis (experimental)');
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console.log(' -v, --version Shows program version');
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console.log();
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process.exit(1);
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}
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options = {};
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process.argv.splice(2).forEach(function (entry) {
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if (forceFile || entry === '-' || entry.slice(0, 1) !== '-') {
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if (typeof fname === 'string') {
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console.log('Error: more than one input file.');
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process.exit(1);
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} else {
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fname = entry;
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}
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} else if (entry === '-h' || entry === '--help') {
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showUsage();
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} else if (entry === '-v' || entry === '--version') {
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console.log('ECMAScript Parser (using Esprima version', esprima.version, ')');
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console.log();
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process.exit(0);
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} else if (entry === '--comment') {
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options.comment = true;
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} else if (entry === '--loc') {
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options.loc = true;
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} else if (entry === '--range') {
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options.range = true;
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} else if (entry === '--raw') {
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options.raw = true;
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} else if (entry === '--tokens') {
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options.tokens = true;
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} else if (entry === '--tolerant') {
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options.tolerant = true;
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} else if (entry === '--') {
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forceFile = true;
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} else {
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console.log('Error: unknown option ' + entry + '.');
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process.exit(1);
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}
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});
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// Special handling for regular expression literal since we need to
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// convert it to a string literal, otherwise it will be decoded
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// as object "{}" and the regular expression would be lost.
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function adjustRegexLiteral(key, value) {
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if (key === 'value' && value instanceof RegExp) {
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value = value.toString();
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}
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return value;
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}
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function run(content) {
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syntax = esprima.parse(content, options);
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console.log(JSON.stringify(syntax, adjustRegexLiteral, 4));
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}
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try {
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if (fname && (fname !== '-' || forceFile)) {
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run(fs.readFileSync(fname, 'utf-8'));
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} else {
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var content = '';
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process.stdin.resume();
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process.stdin.on('data', function(chunk) {
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content += chunk;
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});
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process.stdin.on('end', function() {
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run(content);
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});
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}
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} catch (e) {
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console.log('Error: ' + e.message);
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process.exit(1);
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}
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