96 lines
3.3 KiB
JavaScript
96 lines
3.3 KiB
JavaScript
/*
|
|
* grunt
|
|
* http://gruntjs.com/
|
|
*
|
|
* Copyright (c) 2013 "Cowboy" Ben Alman
|
|
* Licensed under the MIT license.
|
|
* https://github.com/gruntjs/grunt/blob/master/LICENSE-MIT
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
var grunt = require('../grunt');
|
|
|
|
// The module to be exported.
|
|
var template = module.exports = {};
|
|
|
|
// External libs.
|
|
template.date = require('dateformat');
|
|
|
|
// Format today's date.
|
|
template.today = function(format) {
|
|
return template.date(new Date(), format);
|
|
};
|
|
|
|
// Template delimiters.
|
|
var allDelimiters = {};
|
|
|
|
// Initialize template delimiters.
|
|
template.addDelimiters = function(name, opener, closer) {
|
|
var delimiters = allDelimiters[name] = {};
|
|
// Used by grunt.
|
|
delimiters.opener = opener;
|
|
delimiters.closer = closer;
|
|
// Generate RegExp patterns dynamically.
|
|
var a = delimiters.opener.replace(/(.)/g, '\\$1');
|
|
var b = '([\\s\\S]+?)' + delimiters.closer.replace(/(.)/g, '\\$1');
|
|
// Used by Lo-Dash.
|
|
delimiters.lodash = {
|
|
evaluate: new RegExp(a + b, 'g'),
|
|
interpolate: new RegExp(a + '=' + b, 'g'),
|
|
escape: new RegExp(a + '-' + b, 'g')
|
|
};
|
|
};
|
|
|
|
// The underscore default template syntax should be a pretty sane default for
|
|
// the config system.
|
|
template.addDelimiters('config', '<%', '%>');
|
|
|
|
// Set Lo-Dash template delimiters.
|
|
template.setDelimiters = function(name) {
|
|
// Get the appropriate delimiters.
|
|
var delimiters = allDelimiters[name in allDelimiters ? name : 'config'];
|
|
// Tell Lo-Dash which delimiters to use.
|
|
grunt.util._.templateSettings = delimiters.lodash;
|
|
// Return the delimiters.
|
|
return delimiters;
|
|
};
|
|
|
|
// Process template + data with Lo-Dash.
|
|
template.process = function(tmpl, options) {
|
|
if (!options) { options = {}; }
|
|
// Set delimiters, and get a opening match character.
|
|
var delimiters = template.setDelimiters(options.delimiters);
|
|
// Clone data, initializing to config data or empty object if omitted.
|
|
var data = Object.create(options.data || grunt.config.data || {});
|
|
// Expose grunt so that grunt utilities can be accessed, but only if it
|
|
// doesn't conflict with an existing .grunt property.
|
|
if (!('grunt' in data)) { data.grunt = grunt; }
|
|
// Keep track of last change.
|
|
var last = tmpl;
|
|
try {
|
|
// As long as tmpl contains template tags, render it and get the result,
|
|
// otherwise just use the template string.
|
|
while (tmpl.indexOf(delimiters.opener) >= 0) {
|
|
tmpl = grunt.util._.template(tmpl, data);
|
|
// Abort if template didn't change - nothing left to process!
|
|
if (tmpl === last) { break; }
|
|
last = tmpl;
|
|
}
|
|
} catch (e) {
|
|
// In upgrading to Lo-Dash (or Underscore.js 1.3.3), \n and \r in template
|
|
// tags now causes an exception to be thrown. Warn the user why this is
|
|
// happening. https://github.com/documentcloud/underscore/issues/553
|
|
if (String(e) === 'SyntaxError: Unexpected token ILLEGAL' && /\n|\r/.test(tmpl)) {
|
|
grunt.log.errorlns('A special character was detected in this template. ' +
|
|
'Inside template tags, the \\n and \\r special characters must be ' +
|
|
'escaped as \\\\n and \\\\r. (grunt 0.4.0+)');
|
|
}
|
|
// Slightly better error message.
|
|
e.message = 'An error occurred while processing a template (' + e.message + ').';
|
|
grunt.warn(e, grunt.fail.code.TEMPLATE_ERROR);
|
|
}
|
|
// Normalize linefeeds and return.
|
|
return grunt.util.normalizelf(tmpl);
|
|
};
|