Gruntfile.js

module.exports = function(grunt) {

    grunt.initConfig({

        /*--- Data for templates ---*/

        // Files to lint for terminating newlines and trailing whitespace
        lintspaces_src: [
            '.gitignore',
            '.jshintrc',
            'config.rb',
            'glsl/*',
            'Gruntfile.js',
            'index.html',
            'js/**/*.js',
            'package.json',
            'README.md',
            'scss/*.scss',
            'tests/**/*.js'
        ],


        /*--- Core tasks ---*/

        // Lint for terminating newlines and trailing whitespace
        lintspaces: {
            webgol: {
                options: {
                    newline:        true,  // Check for one newline at end of every file
                    trailingspaces: true   // Check for any trailing whitespace
                },
                src: ['<%= lintspaces_src %>']
            }
        },

        // Minify GLSL shaders
        'string-replace': {
            webgol: {
                options: {
                    replacements: [
                        {
                            // Remove single-line comments
                            pattern:     / *\/\/.*$/gm,
                            replacement: ''
                        },
                        {
                            // Remove multi-line comments
                            pattern:     /\/\*[\s\S]+?\*\//g,
                            replacement: ''
                        },
                        {
                            // Collapse multiple newlines
                            pattern:     /\n+/g,
                            replacement: '\n'
                        },
                        {
                            // Collapse whitespace
                            pattern:     / +/g,
                            replacement: ' '
                        }
                    ]
                },
                files: [
                    {
                        expand: true,       // Enable dynamic expansion
                        cwd:    'glsl/',    // src matches are relative to this path
                        src:    '*',        // Pattern to match
                        dest:   'glslmin/'  // Destination path prefix
                    }
                ]
            }
        },

        // Lint JavaScript files
        jshint: {
            webgol: {
                options: {
                    jshintrc: '.jshintrc'
                },
                src: [
                    'js/**/*.js',
                    'tests/**/*.js'
                ]
            }
        },

        // Insert minified GLSL shaders into shader-sources.js
        includereplace: {
            webgol: {
                options: {
                    includesDir: 'glslmin/',
                    processIncludeContents: function(includeContents) {
                        // Replace newlines with \n to create valid JavaScript string literals
                        return includeContents.replace(/\n/g, '\\n');
                    }
                },
                src:  'js/shader-sources.js',
                dest: 'jsmin/shader-sources.js'
            }
        },

        // Compile SCSS to CSS
        compass: {
            webgol: {
                options: {
                    config: 'config.rb'
                }
            }
        },


        /*--- Dev tasks ---*/

        // Concatenate JavaScript files without minifying
        concat: {
            webgol: {
                files: {
                    'jsmin/gol.js':  ['js/gol/**/*.js'],
                    'jsmin/main.js': ['js/main.js']
                }
            }
        },


        /*--- Prod tasks ---*/

        // Concatenate and minify JavaScript files
        uglify: {
            webgol: {
                files: {
                    'jsmin/shader-sources.js': ['jsmin/shader-sources.js'],
                    'jsmin/gol.js':            ['js/gol/**/*.js'],
                    'jsmin/main.js':           ['js/main.js']
                }
            }
        },


        /*--- Test tasks ---*/

        // Run Jasmine tests
        jasmine: {
            webgol: {
                options: {
                    specs:   'tests/specs/**/*.js',
                    helpers: 'tests/helpers/**/*.js'
                },
                src: 'js/gol/**/*.js'
            }
        }

    });

    grunt.loadNpmTasks('grunt-lintspaces');
    grunt.loadNpmTasks('grunt-string-replace');
    grunt.loadNpmTasks('grunt-include-replace');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-compass');
    grunt.loadNpmTasks('grunt-contrib-jasmine');

    grunt.registerTask('webgol_core', ['lintspaces', 'string-replace', 'jshint', 'includereplace', 'compass']);

    grunt.registerTask('webgol_dev',  ['webgol_core', 'concat']);
    grunt.registerTask('webgol_prod', ['webgol_core', 'uglify']);

    grunt.registerTask('webgol_test', ['lintspaces', 'jshint', 'jasmine']);

    grunt.registerTask('default', ['webgol_dev']);

};