Gruntfile.js

module.exports = function (grunt) {
	'use strict';

	require('load-grunt-tasks')(grunt);

	grunt.initConfig({
		pkg: grunt.file.readJSON('package.json'),
		settings: grunt.file.readJSON('grunt-config.json'),

		paths: {
			dist: 'dist',
			src: 'src',
			tmp: '.tmp',
			email: '*.html',
			images: 'images',
			data: 'data',
			partials: 'partials',
		},

		clean: {
			all: ['<%= paths.tmp %>', '<%= paths.dist %>']
		},

		copy: {
			dist: {
				files: [
					{
						expand: true,
						cwd: '<%= paths.tmp %>',
						src: [
							'<%= paths.images %>/*.{gif,png,jpg}',
							'*.html'
						],
						dest: '<%= paths.dist %>'
					}
				]
			}
		},

		less: {
			tmp: {
				options: {
					sourceMap: true
				},
				files: [
					{
						expand: true,
						cwd: '<%= paths.src %>/less',
						src: '**/*.{css,less}',
						dest: '<%= paths.tmp %>/css',
						ext: '.css'
					}
				]
			}
		},

		render: {
			options: {
				data: ['<%= paths.src %>/<%= paths.data %>/*.json']
			},
			html: {
				files: [
					{
						expand: true,
						cwd: '<%= paths.src %>/',
						src: ['*.ejs'],
						dest: '<%= paths.tmp %>/',
						ext: '.html'
					}
				]
			}
		},

		imagemin: {
			options: {
				progressive: false,
				cache: false
			},
			tmp: {
				files: [
					{
						expand: true,
						cwd: '<%= paths.src %>/<%= paths.images %>',
						src: ['**/*.{gif,png,jpg}'],
						dest: '<%= paths.tmp %>/<%= paths.images %>'
					}
				]
			}
		},

		cssmin: {
			minify: {
				expand: true,
				cwd: '<%= paths.tmp %>/css/',
				src: ['**/*.css', '!**/*.min.css'],
				dest: '<%= paths.tmp %>/css/'
			}
		},

		htmlmin: {
			dist: {
				options: {
					removeComments: true,
					collapseWhitespace: true
				},
				files: [
					{
						expand: true,
						flatten: true,
						src: ['<%= paths.tmp %>/*.html'],
						dest: '<%= paths.tmp %>/'
					}
				]
			}
		},

		compress: {
			main: {
				options: {
					archive: '<%= paths.dist %>/<%= settings.common.subject %>.zip'
				},
				files: [
					{expand: true, cwd: '<%= paths.dist %>/', src: ['**'], dest: '<%= settings.common.subject %>/'},
				]
			}
		},

		watch: {
			data: {
				files: ['<%= paths.src %>/<%= paths.data %>/**/*.json'],
				tasks: ['render', 'inliner']
			},
			ejs: {
				files: ['<%= paths.src %>/*.ejs', '<%= paths.src %>/partials/**/*.ejs'],
				tasks: ['render', 'inliner']
			},
			images: {
				files: ['<%= paths.src %>/<%= paths.images %>/*.{gif,png,jpg}'],
				tasks: ['imagemin']
			},
			less: {
				files: ['<%= paths.src %>/less/**/*.{css,less}' ],
				tasks: ['less', 'render', 'inliner']
			},
			livereload: {
				options: {
					livereload: true
				},
				files: [
					'<%= paths.tmp %>/css/**/*.css',
					'<%= paths.tmp %>/*.html',
					'<%= paths.tmp %>/<%= paths.images %>/*.{gif,png,jpg}'
				]
			}
		},

		concurrent: {
			options: {
				logConcurrentOutput: true
			},
			dev: ['watch']
		},

		connect: {
			options: {
				hostname: '*',
				port: '9000',
				open: 'http://localhost:9000/email.html',
				base: ['<%= paths.tmp %>']
			},
			dev: {
				options: {
					livereload: true
				}
			}
		},

		emailBuilder: {
			inline: {
				options: {
					encodeSpecialChars: true
				},
				files: [
					{
						expand: true,
						flatten: true,
						src: ['<%= paths.tmp %>/*.html'],
						dest: '<%= paths.tmp %>/'
					}
				]
			},
			litmus: {
				files: { '<%= paths.tmp %>/email.html': '<%= paths.tmp %>/email.html' },
				options: {
					encodeSpecialChars: true,
					litmus: {
						subject: '<%= settings.common.subject %>',
						username: '<%= settings.litmus.username %>',
						password: '<%= settings.litmus.password %>',
						url: '<%= settings.litmus.url %>',
						applications: '<%= settings.litmus.applications %>'
					}
				}
			},
			emailTest: {
				files: { '<%= paths.tmp %>/email.html': '<%= paths.tmp %>/email.html' },
				options: {
					encodeSpecialChars: false,
					emailTest: {
						email: '<%= settings.email.emailaddress %>',
						subject: '<%= settings.common.subject %>'
					}
				}
			}
		},

		s3: {
			options: {
				key: '<%= settings.aws.key %>',
				secret: '<%= settings.aws.secret %>',
				bucket: '<%= settings.aws.bucket %>',
				access: 'public-read',
				headers: {
					// Two Year cache policy (1000 * 60 * 60 * 24 * 730)
					"Cache-Control": "max-age=630720000, public",
					"Expires": new Date(Date.now() + 63072000000).toUTCString()
				}
			},
			dev: {
				// These options override the defaults
				options: {
					encodePaths: false,
					maxOperations: 20
				},
				// Files to be uploaded.
				upload: [
					{
						src: '<%= paths.tmp %>/<%= paths.images %>/*.{gif,png,jpg}',
						dest: '<%= settings.common.subject %>/<%= paths.images %>/'
					}
				]
			}
		},

		replace: {
			cdn: {
				src: ['<%= paths.tmp %>/*.html'],
				overwrite: true,                 // overwrite matched source files
				replacements: [
					{
						from: /(\'\/?images\/|\"\/?images\/)/g,
						to: '\"<%= settings.aws.url %>/<%= settings.common.subject %>/<%= paths.images %>/'
					}
				]
			}
		}

	});

	grunt.registerTask('inliner', 'emailBuilder:inline');
	grunt.registerTask('emailTest', 'emailBuilder:emailTest');

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

	grunt.registerTask('base', [
		'clean', // delete tmp and dist directories
		'render', // render ejs
		'less', // precompile LESS
		'imagemin' // compress images
	]);

	grunt.registerTask('dev', [
		'base',
		'inliner', // inline css
		'connect:dev', // setup tmp webserver
		'watch', // watch directories for changes to files
	]);

	grunt.registerTask('build', [
		'base',
		'cssmin', // compress css
		'inliner', // inline css
		//'htmlmin', // compress html
		'copy:dist', // copy files from tmp to dist
		'compress' // zip everything up
	]);

	grunt.registerTask('litmus', [
		'base',
		'replace:cdn', // replace image links from local to cdn
		's3', // upload copies of images to s3
		'cssmin', // compress css
		//'htmlmin', // compress html
		'emailBuilder:litmus', // send test to litmus
	]);

	grunt.registerTask('email', [
		'base',
		'replace:cdn', // replace image links from local to cdn
		's3', // upload copies of images to s3
		'cssmin', // compress css
		//'htmlmin', // compress html
		'emailTest' // send test to email
	]);

};