titarenko/gulp-dotify

var through = require('through2');
var dot = require('dot');
var gutil = require('gulp-util');
var _ = require('lodash');
var path = require('path');
var PluginError = gutil.PluginError;

const PLUGIN_NAME = 'gulp-dotify';

function getTemplateName(root, name, extension, separator) {
    var parts = name.split(path.sep);
    var i = parts.indexOf(root);
    parts = parts.slice(i + 1);
    i = parts.length - 1;
    parts[i] = path.basename(parts[i], extension);
    return parts.join(separator);
}

function getTemplateCode(content) {
    return dot.template(content).toString();
}

function readStream(stream, done) {
    var buffer = '';
    stream.on('data', function (chunk) {
        buffer += chunk;
    }).on('end', function () {
        done(null, buffer);
    }).on('error', function (error) {
        done(error);
    });
}

function gulpDotify(options) {
    options = options || {};
    _.defaults(options, {
        root: 'views',
        separator: '-',
        extension: '.html',
        dictionary: 'JST'
    });
    var stream = through.obj(function (file, enc, callback) {
        var complete = function (error, contents) {
            if (error) {
                this.emit('error', new PluginError(PLUGIN_NAME, error));
            }
            try {
                var name = getTemplateName(options.root, file.path, options.extension, options.separator);
                var code = getTemplateCode(contents);
                file.contents = new Buffer([options.dictionary, '["', name, '"] = ', code, ';'].join(''));

                this.push(file);
                return callback();
            }
            catch (exception) {
                this.emit('error', new PluginError(PLUGIN_NAME, exception));
            }
        }.bind(this);

        if (file.isBuffer()) {
            complete(null, file.contents.toString());
        } else if (file.isStream()) {
            readStream(file.contents, complete);
        }
    });
    return stream;
};

module.exports = gulpDotify;