/Gruntfile.js

/* global require, module, console */

/*
 * All source files are created and managed by type in `src`.
 *
 * There three output directories:
 *
 * - `local` - Development and testing
 * - `build` - Intermediate directory prior to optimizations and/or
 *     concatentation
 * - `dist` - Final output for release purposes. This carries over to the master
 *     branch to be copied in the root of the repo.
 * - `cdn` - Final output for deployment on CDNs. This includes *only* Cilantro
 *     files, no source maps, and no third-party libraries.
 *
 * Each Grunt task has a target named `local` which performs copying,
 * compiling or symlinking in the `local` directory for development.
 * Additional targets may be defined for `build` or `dist` depending on
 * the requirements.
 *
 * Shared options for a task should be defined first, followed by each
 * task entry. Each task can define it's own set of options to override
 * the shared ones defined for the task.
 */

module.exports = function(grunt) {
    var shell = require('shelljs');

    var pkg = grunt.file.readJSON('package.json');

    var run = function(cmd) {
        grunt.log.ok(cmd);
        shell.exec(cmd);
    };

    var vendorModules = [
        'jquery',
        'backbone',
        'underscore',
        'marionette',
        'highcharts',
        'bootstrap',
        'json2',
        'loglevel'
    ];

    grunt.initConfig({
        pkg: pkg,

        srcDir: 'src',
        specDir: 'spec',
        localDir: 'local',
        buildDir: 'build',
        distDir: 'dist',
        cdnDir: 'cdn',

        serve: {
            forever: {
                options: {
                    keepalive: true,
                    port: 8125
                }
            },

            jasmine: {
                options: {
                    port: 8126
                }
            }
        },

        watch: {
            grunt: {
                tasks: ['local'],
                files: ['Gruntfile.js']
            },

            copy: {
                tasks: ['copy:local'],
                files: [
                    '<%= srcDir %>/js/**/**/**/*',
                    '<%= srcDir %>/css/**/**/**/*',
                    '<%= srcDir %>/font/**/**/**/*',
                    '<%= srcDir %>/img/**/**/**/*'
                ]
            },

            tests: {
                tasks: ['jasmine:local:build'],
                files: ['<%= specDir %>/**/**/**/*']
            },

            sass: {
                tasks: ['sass:local'],
                files: ['<%= srcDir %>/scss/**/**/**/*']
            }
        },

        sass: {
            options: {
                sourcemap: true
            },

            local: {
                options: {
                    trace: true,
                    style: 'expanded'
                },

                files: {
                    '<%= localDir %>/css/style.css': '<%= srcDir %>/scss/style.scss'
                }
            },

            dist: {
                options: {
                    quiet: true,
                    style: 'compressed'
                },

                files: {
                    '<%= distDir %>/css/style.css': '<%= srcDir %>/scss/style.scss'
                }
            },

            cdn: {
                options: {
                    quiet: true,
                    sourcemap: false,
                    style: 'compressed'
                },

                files: {
                    '<%= cdnDir %>/css/style.css': '<%= srcDir %>/scss/style.scss'
                }
            }
        },

        copy: {
            local: {
                files: [{
                    expand: true,
                    cwd: '<%= srcDir %>/js',
                    src: ['**/*'],
                    dest: '<%= localDir %>/js'
                }, {
                    expand: true,
                    cwd: '<%= srcDir %>/css',
                    src: ['**/*'],
                    dest: '<%= localDir %>/css'
                }, {
                    expand: true,
                    cwd: '<%= srcDir %>/font',
                    src: ['**/*'],
                    dest: '<%= localDir %>/font'
                }, {
                    expand: true,
                    cwd: '<%= srcDir %>/img',
                    src: ['**/*'],
                    dest: '<%= localDir %>/img'
                }, {
                    expand: true,
                    src: ['bower.json', 'package.json'],
                    dest: '<%= localDir %>'
                }]
            },

            build: {
                files: [{
                    expand: true,
                    cwd: '<%= srcDir %>/templates',
                    src: ['**/*'],
                    dest: '<%= buildDir %>/js/templates'
                }, {
                    expand: true,
                    cwd: '<%= srcDir %>/js',
                    src: ['**/*'],
                    dest: '<%= buildDir %>/js'
                }]
            },

            dist: {
                files: [{
                    expand: true,
                    cwd: '<%= srcDir %>/css',
                    src: ['**/*'],
                    dest: '<%= distDir %>/css'
                }, {
                    expand: true,
                    cwd: '<%= srcDir %>/font',
                    src: ['**/*'],
                    dest: '<%= distDir %>/font'
                }, {
                    expand: true,
                    cwd: '<%= srcDir %>/img',
                    src: ['**/*'],
                    dest: '<%= distDir %>/img'
                }, {
                    expand: true,
                    src: ['bower.json', 'package.json'],
                    dest: '<%= distDir %>'
                }]
            },

            cdn: {
                files: [{
                    expand: true,
                    cwd: '<%= srcDir %>/img',
                    src: ['checkmark.png'],
                    dest: '<%= cdnDir %>/img'
                }]
            }
        },

        symlink: {
            options: {
                type: 'dir'
            },

            templates: {
                relativeSrc: '../../<%= srcDir %>/templates',
                dest: '<%= localDir %>/js/templates'
            }
        },

        requirejs: {
            options: {
                mainConfigFile: '<%= srcDir %>/js/cilantro/main.js',
                baseUrl: '.',
                inlineText: true,
                preserveLicenseComments: false,
                wrap: false,
                logLevel: 1,

                throwWhen: {
                    optimize: true
                },

                modules: [{
                    name: pkg.name,
                    exclude: vendorModules
                }],

                done: function(done, output) {
                    var dups = require('rjs-build-analysis').duplicates(output);

                    if (dups.length > 0) {
                        grunt.log.subhead('Duplicates found in RequireJS build:');
                        grunt.log.warn(dups);
                        done(new Error('r.js built duplicate modules, please ' +
                                       'check the `excludes` option.'));
                    }

                    done();
                }
            },

            dist: {
                options: {
                    appDir: '<%= buildDir %>/js',
                    dir: '<%= distDir %>/js',
                    optimize: 'uglify2',
                    generateSourceMaps: true,
                    removeCombined: false
                }
            },

            cdn: {
                options: {
                    appDir: '<%= buildDir %>/js',
                    dir: '<%= cdnDir %>/js',
                    optimize: 'uglify2',
                    generateSourceMaps: false,
                    removeCombined: true
                }
            }
        },

        clean: {
            local: ['<%= localDir %>'],
            build: ['<%= buildDir %>'],
            dist: ['<%= distDir %>'],
            cdn: ['<%= cdnDir %>'],
            postdist: ['<%= distDir %>/js/templates'],

            postcdn: [
                '<%= cdnDir %>/js/templates',
                '<%= cdnDir %>/js/require.js'
            ].concat(vendorModules.map(function(mod) {
                return '<%= cdnDir %>/js/' + mod + '.js';})),

            release: [
                '<%= localDir %>/js/build.txt',
                '<%= distDir %>/js/build.txt',
                '<%= cdnDir %>/js/build.txt'
            ]
        },

        jasmine: {
            options: {
                specs: '<%= specDir %>/**/**/**/*.js',
                host: 'http://127.0.0.1:8126',
                helpers: './specConfig.js',
                keepRunner: true,
                template: require('grunt-template-jasmine-requirejs'),

                templateOptions: {
                    version: '<%= srcDir %>/js/require.js'
                }
            },

            local: {
                options: {
                    templateOptions: {
                        requireConfigFile: '<%= localDir %>/js/cilantro/main.js',

                        requireConfig: {
                            baseUrl: '<%= localDir %>/js'
                        }
                    }
                }
            },

            dist: {
                options: {
                    templateOptions: {
                        requireConfigFile: '<%= distDir %>/js/cilantro/main.js',

                        requireConfig: {
                            baseUrl: '<%= distDir %>/js'
                        }
                    }
                }
            }
        },

        amdcheck: {
            local: {
                options: {
                    removeUnusedDependencies: false
                },

                files: [{
                    expand: true,
                    src: ['<%= localDir %>/js/**/**/**/**/*.js']
                }]

            }
        },

        jshint: {
            options: {
                camelcase: true,
                immed: true,
                indent: 4,
                latedef: true,
                noarg: true,
                noempty: true,
                undef: true,
                unused: true,
                trailing: true,
                maxdepth: 3,
                maxlen: 90,
                browser: true,
                eqeqeq: true,

                globals: {
                    define: true,
                    require: true
                },

                reporter: require('jshint-stylish'),

                ignores: [
                    '<%= srcDir %>/js/backbone.js',
                    '<%= srcDir %>/js/bootstrap.js',
                    '<%= srcDir %>/js/highcharts.js',
                    '<%= srcDir %>/js/jquery.js',
                    '<%= srcDir %>/js/json2.js',
                    '<%= srcDir %>/js/loglevel.js',
                    '<%= srcDir %>/js/marionette.js',
                    '<%= srcDir %>/js/require.js',
                    '<%= srcDir %>/js/text.js',
                    '<%= srcDir %>/js/tpl.js',
                    '<%= srcDir %>/js/underscore.js',
                    '<%= srcDir %>/js/plugins/bootstrap-datepicker.js',
                    '<%= srcDir %>/js/plugins/jquery-easing.js',
                    '<%= srcDir %>/js/plugins/jquery-ui.js'
                ],
            },

            src: ['<%= srcDir %>/js/**/**/**/**/*.js']
        }
    });

    grunt.loadNpmTasks('grunt-contrib-jasmine');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-sass');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-requirejs');
    grunt.loadNpmTasks('grunt-contrib-copy');
    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-symlink');
    grunt.loadNpmTasks('grunt-amdcheck');

    grunt.registerMultiTask('serve', 'Run a Node server for testing', function() {
        var http = require('http');
        var path = require('path');
        var url = require('url');
        var fs = require('fs');

        var contentTypes = {
            '.js': 'text/javascript',
            '.css': 'text/css',
            '.html': 'text/html'
        };

        var options = this.options({
            hostname: 'localhost',
            base: '.',
            port: 8125,
            keepalive: false
        });

        var serveResponse = function(filename, response) {
            var extname = path.extname(filename);
            var contentType = contentTypes[extname] || 'text/plain';

            response.writeHead(200, {'Content-Type': contentType});

            var stream = fs.createReadStream(filename);
            stream.pipe(response);
        };

        var serve404 = function(filename, response) {
            response.writeHead(404);
            response.end();
        };

        var serve500 = function(filename, response) {
            response.writeHead(500);
            response.end();
        };

        var server = http.createServer(function(request, response) {
            var uri = url.parse(request.url).pathname;
            var filename = path.join(options.base, uri);

            fs.exists(filename, function(exists) {
                if (exists) {
                    fs.readFile(filename, function(error) {
                        if (error) {
                            if (error.code === 'EISDIR') {
                                filename += 'index.html';
                                fs.exists(filename, function(exists) {
                                    if (exists) {
                                        fs.readFile(filename, function(error) {
                                            if (error) {
                                                serve500(filename, response);
                                            }
                                            else {
                                                serveResponse(filename, response);
                                            }
                                        });
                                    }
                                    else {
                                        serve404(filename, response);
                                    }
                                });
                            }
                            else {
                                serve500(filename, response);
                            }
                        }
                        else {
                            serveResponse(filename, response);
                        }
                    });
                }
                else {
                    serve404(filename, response);
                }
            });
        });

        if (options.hostname === '*') {
            options.hostname = null;
        }

        if (options.port === '?') {
            options.port = 0;
        }

        var done = this.async();

        return server.listen(options.port, options.hostname).on('listening', function() {
            var address = server.address();
            var hostname = server.hostname || 'localhost';

            if (!options.keepalive) {
                done();
            }
            else {
                grunt.log.writeln('Listening on ' + hostname + ':' +
                                  address.port + '...');
            }
        }).on('error', function(error) {
            if (error.code === 'EADDRINUSE') {
                grunt.fatal('Port ' + options.port + ' is already in use by ' +
                            'another process.');
            }
            else {
                grunt.fatal(error);
            }
        });
    });

    grunt.registerTask('local', 'Creates a build for local development and testing', [
        'sass:local',
        'copy:local',
        'symlink',
        'jasmine:local:build'
    ]);

    grunt.registerTask('dist', 'Creates a build for distribution', [
        'clean:build',
        'copy:build',
        'clean:dist',
        'requirejs:dist',
        'sass:dist',
        'copy:dist',
        'clean:postdist'
    ]);

    grunt.registerTask('cdn', 'Creates a build for CDN distribution', [
        'clean:build',
        'copy:build',
        'clean:cdn',
        'requirejs:cdn',
        'sass:cdn',
        'copy:cdn',
        'clean:postcdn',
    ]);

    grunt.registerTask(
        'work',
        'Performs the initial local build and starts a watch process',
        [
            'local',
            'watch'
        ]
    );

    grunt.registerTask('test', 'Runs the headless test suite', [
        'copy:local',
        'symlink',
        'serve:jasmine',
        'jasmine:local'
    ]);

    var changeVersion = function(fname, version) {
        var contents = grunt.file.readJSON(fname);
        var current = contents.version;
        contents.version = version;
        grunt.file.write(fname, JSON.stringify(contents, null, 2));
        grunt.log.ok('' + fname + ': ' + current + ' => ' + version);
    };

    var replaceVersion = function(fname, current, version) {
        var options = {encoding: 'utf8'};
        var content = grunt.file.read(fname, options);

        var regexp = new RegExp("version: '" + current + "'");
        if (!regexp.test(content)) {
            grunt.fatal('File contents does not match version');
        }
        content = content.replace(regexp, "version: '" + version + "'");

        grunt.file.write(fname, content, options);
        grunt.log.ok('' + fname + ': ' + current + ' => ' + version);
    };

    // Uses package.json as the canonical version.
    grunt.registerTask('bump-final', 'Updates the version to final', function() {
        var svutil = require('semver-utils');
        var current = pkg.version;
        var version = svutil.parse(pkg.version);

        // Ensure it is able to be bumped.
        if (version.release !== 'beta') {
            grunt.fatal('Version ' + current + ' not beta. Is this ready for release?');
        }

        // Remove release and build strings.
        version.release = '';
        version.build = '';
        pkg.version = svutil.stringify(version);

        replaceVersion('src/js/cilantro/core.js', current, pkg.version);

        var files = ['package.json', 'bower.json'];
        for (var i = 0; i < files.length; i++) {
            changeVersion(files[i], pkg.version);
        }
    });

    grunt.registerTask(
        'bump-patch',
        'Updates the version to next patch-release',
        function() {
            var svutil = require('semver-utils');
            var current = pkg.version;
            var version = svutil.parse(pkg.version);

            // Ensure it is able to be bumped.
            console.log(version.release);
            if (version.release) {
                grunt.fatal('Version ' + current + ' not final. Should this ' +
                            'be bumped to a pre-release?');
            }

            // Remove release and build strings
            version.patch = '' + (parseInt(version.patch, 10) + 1);
            version.release = 'beta';
            version.build = '';
            pkg.version = svutil.stringify(version);

            replaceVersion('src/js/cilantro/core.js', current, pkg.version);

            var files = ['package.json', 'bower.json'];
            for (var i = 0; i < files.length; i++) {
                changeVersion(files[i], pkg.version);
            }

            run('git add bower.json package.json src/js/cilantro/core.js');
            run("git commit -s -m '" +
                [version.major, version.minor, version.patch].join('.') + " Beta'");
        }
    );

    grunt.registerTask('tag-release', 'Create a release on master', function() {
        run('git add bower.json package.json src/js/cilantro/core.js cdn/');
        run("git commit -s -m '" + pkg.version + " Release'");
        run('git tag ' + pkg.version);
    });

    grunt.registerTask(
        'release-binaries',
        'Create a release binary for upload',
        function() {
            var releaseDirName = '' + pkg.name + '-' + pkg.version;

            run('rm -rf ' + pkg.name);
            run('mkdir -p ' + pkg.name);
            run('cp -r dist/* ' + pkg.name);
            run('zip -r ' + releaseDirName + '.zip ' + pkg.name);
            run('tar -Hzcf ' + releaseDirName + '.tar.gz ' + pkg.name);

            run('rm -rf ' + pkg.name);
            run('mkdir -p ' + pkg.name);
            run('cp -r local/* ' + pkg.name);
            run('zip -r ' + releaseDirName + '-src.zip ' + pkg.name);
            run('tar -Hzcf ' + releaseDirName + '-src.tar.gz ' + pkg.name);

            run('rm -rf ' + pkg.name);
        }
    );

    grunt.registerTask(
        'release-help',
        'Prints the post-release steps',
        function() {
            grunt.log.ok('Push the code and tags: git push && git push --tags');
            grunt.log.ok('Go to ' + pkg.homepage + '/releases to update the ' +
                         'release descriptions and upload the binaries.');
        }
    );

    grunt.registerTask(
        'release',
        'Builds distribution files, creates release binaries, and creates Git tag',
        [
            'bump-final',
            'local',
            'dist',
            'cdn',
            'clean:release',
            'release-binaries',
            'tag-release',
            'release-help',
            'bump-patch'
        ]
    );
};