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/**
* Special concat/build task to handle various jQuery build requirements
* Concats AMD modules, removes their definitions, and includes/excludes specified modules
*/
module.exports = function( grunt ) {
var fs = require("fs"),
srcFolder = __dirname + "/../src/",
rdefineEnd = /\}\);[^}\w]*$/,
// This is temporary until the skipSemiColonInsertion option makes it to NPM
requirejs = require("./r"),
config = {
baseUrl: "src",
name: "jquery",
out: "dist/jquery.js",
// We have multiple minify steps
optimize: "none",
skipSemiColonInsertion: true,
wrap: {
startFile: "src/intro.js",
endFile: "src/outro.js"
},
onBuildWrite: convert
};
/**
* Strip all definitions generated by requirejs
* Convert "var" modules to var declarations
* "var module" means the module only contains a return statement that should be converted to a var declaration
* This is indicated by including the file in any "var" folder
* @param {String} name
* @param {String} path
* @param {String} contents The contents to be written (including their AMD wrappers)
*/
function convert( name, path, contents ) {
// Convert var modules
if ( /\/var\//.test( path ) ) {
contents = contents
.replace( /define\([\w\W]*?return/, "var " + (/var\/([\w-]+)/.exec(name)[1]) + " =" )
.replace( rdefineEnd, "" );
// Sizzle treatment
} else if ( /\/sizzle$/.test( name ) ) {
contents = "var Sizzle =\n" + contents
// Remove EXPOSE lines from Sizzle
.replace( /\/\/\s*EXPOSE[\w\W]*\/\/\s*EXPOSE/, "return Sizzle;" );
} else {
// Ignore jQuery's return statement (the only necessary one)
if ( name !== "jquery" ) {
contents = contents
.replace( /return\s+[^\}]+(\}\);[^\w\}]*)$/, "$1" );
}
// Remove define wrappers, closure ends, and empty declarations
contents = contents
.replace( /define\([^{]*?{/, "" )
.replace( rdefineEnd, "" )
// Remove empty definitions
.replace( /define\(\[[^\]]+\]\)[\W\n]+$/, "" );
}
return contents;
}
grunt.registerMultiTask(
"build",
"Concatenate source, remove sub AMD definitions, (include/exclude modules with +/- flags), embed date/version",
function() {
var flag, index,
done = this.async(),
flags = this.flags,
name = this.data.dest,
minimum = this.data.minimum,
removeWith = this.data.removeWith,
excluded = [],
included = [],
version = grunt.config( "pkg.version" ),
/**
* Recursively calls the excluder to remove on all modules in the list
* @param {Array} list
* @param {String} [prepend] Prepend this to the module name. Indicates we're walking a directory
*/
excludeList = function( list, prepend ) {
if ( list ) {
prepend = prepend ? prepend + "/" : "";
list.forEach(function( module ) {
// Exclude var modules as well
if ( module === "var" ) {
excludeList( fs.readdirSync( srcFolder + prepend + module ), prepend + module );
return;
}
if ( prepend ) {
// Skip if this is not a js file and we're walking files in a dir
if ( !(module = /([\w-\/]+)\.js$/.exec( module )) ) {
return;
}
// Prepend folder name if passed
// Remove .js extension
module = prepend + module[1];
}
// Avoid infinite recursion
if ( excluded.indexOf( module ) === -1 ) {
excluder( "-" + module );
}
});
}
},
/**
* Adds the specified module to the excluded or included list, depending on the flag
* @param {String} flag A module path relative to the src directory starting with + or - to indicate whether it should included or excluded
*/
excluder = function( flag ) {
var m = /^(\+|\-|)([\w\/-]+)$/.exec( flag ),
exclude = m[1] === "-",
module = m[2];
if ( exclude ) {
// Can't exclude certain modules
if ( minimum.indexOf( module ) === -1 ) {
// Add to excluded
if ( excluded.indexOf( module ) === -1 ) {
grunt.log.writeln( flag );
excluded.push( module );
// Exclude all files in the folder of the same name
// These are the removable dependencies
// It's fine if the directory is not there
try {
excludeList( fs.readdirSync( srcFolder + module ), module );
} catch( e ) {
grunt.verbose.writeln( e );
}
}
// Check removeWith list
excludeList( removeWith[ module ] );
} else {
grunt.log.error( "Module \"" + module + "\" is a mimimum requirement.");
if ( module === "selector" ) {
grunt.log.error( "If you meant to replace Sizzle, use -sizzle instead." );
}
}
} else {
grunt.log.writeln( flag );
included.push( module );
}
};
// append commit id to version
if ( process.env.COMMIT ) {
version += " " + process.env.COMMIT;
}
// figure out which files to exclude based on these rules in this order:
// dependency explicit exclude
// > explicit exclude
// > explicit include
// > dependency implicit exclude
// > implicit exclude
// examples:
// * none (implicit exclude)
// *:* all (implicit include)
// *:*:-css all except css and dependents (explicit > implicit)
// *:*:-css:+effects same (excludes effects because explicit include is trumped by explicit exclude of dependency)
// *:+effects none except effects and its dependencies (explicit include trumps implicit exclude of dependency)
for ( flag in flags ) {
if ( flag !== "*" ) {
excluder( flag );
}
}
// Handle Sizzle exclusion
// Replace with selector-native
if ( (index = excluded.indexOf("sizzle")) > -1 ) {
config.rawText = {
selector: "define(['./selector-native']);"
};
excluded.splice( index, 1 );
}
grunt.verbose.writeflags( excluded, "Excluded" );
grunt.verbose.writeflags( included, "Included" );
// append excluded modules to version
if ( excluded.length ) {
version += " -" + excluded.join( ",-" );
// set pkg.version to version with excludes, so minified file picks it up
grunt.config.set( "pkg.version", version );
grunt.verbose.writeln( "Version changed to " + version );
// Have to use shallow or core will get excluded since it is a dependency
config.excludeShallow = excluded;
}
config.include = included;
/**
* Handle Final output from the optimizer
* @param {String} compiled
*/
config.out = function( compiled ) {
compiled = compiled
// Embed Version
.replace( /@VERSION/g, version )
// Embed Date
// yyyy-mm-ddThh:mmZ
.replace( /@DATE/g, ( new Date() ).toISOString().replace( /:\d+\.\d+Z$/, "Z" ) );
// Write concatenated source to file
grunt.file.write( name, compiled );
};
// Trace dependencies and concatenate files
requirejs.optimize( config, function( response ) {
grunt.verbose.writeln( response );
grunt.log.ok( "File '" + name + "' created." );
done();
}, function( err ) {
done( err );
});
});
// Special "alias" task to make custom build creation less grawlix-y
// Translation example
//
// grunt custom:+ajax,-dimensions,-effects,-offset
//
// Becomes:
//
// grunt build:*:*:+ajax:-dimensions:-effects:-offset
grunt.registerTask( "custom", function() {
var args = [].slice.call(arguments),
modules = args.length ? args[0].replace(/,/g, ":") : "";
grunt.log.writeln( "Creating custom build...\n" );
grunt.task.run([ "build:*:*:" + modules, "pre-uglify", "uglify", "dist" ]);
});
};
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