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139 lines
4.8 KiB
139 lines
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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