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