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97 lines
3.2 KiB
JavaScript
97 lines
3.2 KiB
JavaScript
'use strict';
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var transformers = require('transformers');
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var jstransformer = require('jstransformer');
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var uglify = require('uglify-js');
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var CleanCSS = require('clean-css');
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var warned = {};
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var alternatives = {
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uglifyJS: 'uglify-js',
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uglify: 'uglify-js',
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uglifyCSS: 'clean-css',
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'uglify-css': 'clean-css' ,
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uglifyJSON: 'json',
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'uglify-json': 'json',
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live: 'livescript',
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LiveScript: 'livescript',
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ls: 'livescript',
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// TODO: remove if we add support for coffeekup
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coffeekup: 'coffeecup',
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// The `style` transformer is not the same as the `stylus` jstransformer
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styl: 'stylus',
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coffee: 'coffee-script',
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coffeescript: 'coffee-script',
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coffeeScript: 'coffee-script',
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// these marker transformers haven't made sense in a long time
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css: 'verbatim',
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js: 'verbatim',
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};
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var deprecated = ['jqtpl', 'jazz'];
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function getMarkdownImplementation() {
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var implementations = ['marked', 'supermarked', 'markdown-js', 'markdown'];
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while (implementations.length) {
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try {
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require(implementations[0]);
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return implementations[0];
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} catch (ex) {
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implementations.shift();
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}
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}
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return 'markdown-it';
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}
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module.exports = filter;
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function filter(name, str, options) {
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if (typeof filter[name] === 'function') {
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return filter[name](str, options);
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} else {
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var tr;
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try {
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tr = jstransformer(require('jstransformer-' + name));
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} catch (ex) {}
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if (tr) {
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// TODO: we may want to add a way for people to separately specify "locals"
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var result = tr.render(str, options, options).body;
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if (options && options.minify) {
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try {
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switch (tr.outputFormat) {
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case 'js':
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result = uglify.minify(result, {fromString: true}).code;
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break;
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case 'css':
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result = new CleanCSS().minify(result).styles;
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break;
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}
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} catch (ex) {
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// better to fail to minify than output nothing
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}
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}
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return result;
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} else if (transformers[name]) {
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if (!warned[name]) {
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warned[name] = true;
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if (name === 'md' || name === 'markdown') {
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var implementation = getMarkdownImplementation();
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console.log('Transformers.' + name + ' is deprecated, you must replace the :' +
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name + ' jade filter, with :' +
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implementation + ' and install jstransformer-' +
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implementation + ' before you update to jade@2.0.0.');
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} else if (alternatives[name]) {
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console.log('Transformers.' + name + ' is deprecated, you must replace the :' +
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name + ' jade filter, with :' +
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alternatives[name] + ' and install jstransformer-' +
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alternatives[name] + ' before you update to jade@2.0.0.');
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} else {
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console.log('Transformers.' + name + ' is deprecated, to continue using the :' +
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name + ' jade filter after jade@2.0.0, you will need to install jstransformer-' +
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name.toLowerCase() + '.');
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}
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}
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return transformers[name].renderSync(str, options);
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} else {
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throw new Error('unknown filter ":' + name + '"');
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}
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}
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}
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