117 lines
2.6 KiB
JavaScript
117 lines
2.6 KiB
JavaScript
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#!/usr/bin/env node
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'use strict';
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var parseArgs = require('minimist');
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var gonzales = require('..');
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var fs = require('fs');
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var path = require('path');
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var options = getOptions();
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if (options.help) {
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displayHelp();
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process.exit(0);
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}
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if (isSTDIN()) {
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processSTDIN();
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} else {
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processFile(options._[0]);
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}
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function getOptions() {
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var parserOptions = {
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boolean: ['silent', 'simple'],
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alias: {
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help: 'h',
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syntax: 's',
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context: 'c'
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}
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};
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return parseArgs(process.argv.slice(2), parserOptions);
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}
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function isSTDIN() {
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return options._.indexOf('-') !== -1;
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}
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function processSTDIN() {
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var input = '';
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process.stdin.resume();
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process.stdin.setEncoding('utf8');
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process.stdin.on('data', data => {
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input += data;
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});
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process.stdin.on('end', () => {
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processInputData(input);
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});
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}
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function processFile(file) {
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if (!file) process.exit(0);
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if (!options.syntax) options.syntax = path.extname(file).substring(1);
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var css = fs.readFileSync(file, 'utf-8').trim();
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processInputData(css);
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}
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function processInputData(input) {
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try {
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var ast = gonzales.parse(input, {
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syntax: options.syntax,
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context: options.context
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});
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printTree(ast);
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process.exit(0);
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} catch (e) {
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if (!options.silent) process.stderr.write(e.toString());
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process.exit(1);
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}
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}
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function printTree(ast) {
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if (!options.simple) {
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var tree = ast.toJson();
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process.stdout.write(tree);
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} else {
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var lastLevel;
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ast.traverse(function(node, i, parent, lastLevel) {
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var type = node.type;
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var spaces = new Array(lastLevel).join(' |');
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if (typeof node.content === 'string') {
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var content = JSON.stringify(node.content);
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console.log(spaces, '->', type);
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console.log(spaces, ' ', content);
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} else {
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console.log(spaces, '->', type);
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}
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});
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var spaces = new Array(lastLevel).join(' -');
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console.log(spaces);
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}
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}
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function displayHelp() {
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var help = [
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'NAME',
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' gonzlaes-pe — Parse a css file and print its parse tree in JSON',
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'',
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'SYNOPSIS',
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' gonzales-pe [options] file.js',
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' cat file.js | gonzales-pe [options] -',
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'',
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'OPTIONS',
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' -s, --syntax',
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' Syntax name: css, less, sass or scss.',
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' -c, --context',
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' Context of code part. See docs on node types for more info.',
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' --simple',
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' Print a simplified parse tree structure instead of JSON.',
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' --silent',
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' Don\'t print any error messages.'
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];
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console.log(help.join('\n'));
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}
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