wukong-templates/index.js

A wukong plugin to render files with templates.

'use strict';

/**
 *  Module dependencies.
 */

var debug = require('debug')('wukong:templates');
var extend = require('extend');
var cons = require('consolidate');
var match = require('multimatch');

/**
 *  Expose `templates`.
 */

module.exports = templates;

function templates(opts) {
  opts = opts || {};
  if ('string' === typeof opts) opts = { engine: opts };
  if (!opts.engine) throw new Error('"engine" option required!');

  var dir = opts.directory || 'templates';
  var engine = opts.engine;
  var ext = opts.ext;
  var def = opts.default;
  var pattern = opts.pattern;
  var inPlace = opts.inPlace;
  engine = cons[engine];

  return function *templates(next) {
    var file = this.file;
    var path = file.path;
    var tmpl = file.template || def;
    if ((pattern && !match(path, pattern).length)
      || (!tmpl && !inPlace)) yield next;

    var wukong = this.wukong;
    var metadata = wukong.metadata();
    var clone = extend({}, metadata, file);
    var contents = clone.contents;
    var _render = engine;
    if (inPlace) {
      tmpl = contents;
      _render = engine.render;
    } else {
      tmpl = wukong.join(dir, tmpl);
      clone.contents = contents;
    }
    function render() {
      return function (done) {
        _render(tmpl, clone, done);
      };
    }
    file.contents = yield render();
    debug('converted file: %s', path);
    yield next;
  };
}