grunt-preprocess and grunt-env mystery

Question

I'm banging my head on this one;

I want to alter my html file based on development-environment or production. I followed a topic here on Stackoverflow but somehow the preprocess-context arguments are always the last one in the files. Okay I'll include some snippets.

Piece of Grunt.js

    //Grunt task to automate environment configuration for future tasks.
    env : {
        //USER : 'raymond',
        //PATH : '/bin:/usr/bin',

        options : {
            /* Shared Options Hash */
            //globalOption : 'foo'
        },
        dev: {
            NODE_ENV : 'DEVELOPMENT'
        },
        prod : {
            NODE_ENV : 'PRODUCTION'
        }
    },
    //Grunt task around preprocess npm module.
    preprocess : {
        options: {
            context : {
                DEBUG       : true,
                now         : '<%= grunt.template.today() %>',//@TODO .toISOString()
                ver         : '<%= pkg.version %>'
            }
        },
        dev : {
            options : {
                context : {
                    url         : 'http://www.<%= pkg.name %><%= pkg.tld.dev %>',
                    concat      : '<%= pkg.name %><%= pkg.tld.dev %>.concat.js',
                    uglify      : '<%= pkg.name %><%= pkg.tld.dev %>.concat.min.js',
                    css         : '<%= pkg.name %><%= pkg.tld.dev %>.css',
                    cssMin      : '<%= pkg.name %><%= pkg.tld.dev %>.min.css'
                }
            },
            src : 'index.html',
            dest : 'dist/dev/index.html'
            // @TODO write to dist/dev-directory fails cause probably permissions checked it;
            // I have to 777 on www-data to run Nginx properly. Strange cause raymond is part of group www-data

        },
        prod : {
            options : {
                context : {
                    url         : 'http://www.<%= pkg.name %><%= pkg.tld.prod %>',
                    concat      : '<%= pkg.name %><%= pkg.tld.prod %>.concat.js',
                    uglify      : '<%= pkg.name %><%= pkg.tld.prod %>.concat.min.js',
                    css         : '<%= pkg.name %><%= pkg.tld.prod %>.css',
                    cssMin      : '<%= pkg.name %><%= pkg.tld.prod %>.min.css'
                }
            },
            src : '<%= preprocess.dev.src %>',
            dest : 'dist/prod/index.html'
        }
    },

Source index.html

    <!-- @if NODE_ENV == 'DEVELOPMENT' -->
    <script type="text/javascript" src="/js/vendor/jquery-2.1.0.js"></script>
    <script type="text/javascript" src="/js/vendor/jquery.hammer-1.0.6.js"></script>
    <script type="text/javascript" src="/js//vendor/snap.svg-0.2.0.js"></script>
    <script type="text/javascript" src="/js/vendor/helper.js"></script>
    <script type="text/javascript" src="/js/plugins.js"></script>
    <script type="text/javascript" src="/js/myradon.js"></script>
    <script type="text/javascript" src="/js/myradon-snap.js"></script>
    <!--
    <script src="<!-- @echo url -->/js/<!-- @echo concat -->"></script>
    <script src="<!-- @echo url -->/js/<!-- @echo uglify -->"></script>
    -->
    <!-- @endif -->
    <!-- @if NODE_ENV == 'PRODUCTION' -->
    <!-- <script src="<!-- @echo url -->/js/<!-- @echo concat -->"></script> -->
    <script src="<!-- @echo url -->/js/<!-- @echo uglify -->"></script>
    <script>
        var _gaq = _gaq || [];
        _gaq.push(['_setAccount', 'UA-5427260-3']); //www.myradon.net = UA-5427260-2, www.myradon.nl = UA-5427260-3, www2.myradon.net = UA-5427260-4
        _gaq.push(['_trackPageview']);
        (function () {
            var ga = document.createElement('script');
            ga.type = 'text/javascript';
            ga.async = true;
            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
            var s = document.getElementsByTagName('script')[0];
            s.parentNode.insertBefore(ga, s);
        })();
    </script>
    <!-- @endif -->
</body>

This is the output of index.html that gets rendered by preprocess:dev;

    <!-- <script src="http://www.myradon.net/js/myradon.net.concat.js"></script> -->
    <script src="http://www.myradon.net/js/myradon.net.concat.min.js"></script>
    <script>
        var _gaq = _gaq || [];
        _gaq.push(['_setAccount', 'UA-5427260-3']); //www.myradon.net = UA-5427260-2, www.myradon.nl = UA-5427260-3, www2.myradon.net = UA-5427260-4
        _gaq.push(['_trackPageview']);
        (function () {
            var ga = document.createElement('script');
            ga.type = 'text/javascript';
            ga.async = true;
            ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
            var s = document.getElementsByTagName('script')[0];
            s.parentNode.insertBefore(ga, s);
        })();
    </script>
</body>

As you can see @if NODE_ENV == 'DEVELOPMENT' is ignored but the context arguments from preprocess:dev are passed to @if NODE_ENV == 'PRODUCTION' This really makes no sence to me. Do you have a clue?!

Answer 1

Okay guys i'm using Grunt-processhtml. It does exactly what I had in mind. you can set variables in a context. Remove blocks of html, set url's or metatags innerHTML based on envirenment really nice. Only downside, maybe there is a setting for it, it leaves html-comment-markup for processing the html-code.

Answer 2

I don't know if it matters but I use single '=' just like per example at: grunt-preprocess on npm

<!-- @if NODE_ENV='production' -->
<script src="some/production/lib/like/analytics.js"></script>
<!-- @endif -->