jquery/build/tasks/uglify.js

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module.exports = function( grunt ) {
"use strict";
var fs = require( "fs" );
// Work around grunt-contrib-uglify sourceMap issues (jQuery #13776)
grunt.registerMultiTask( "pre-uglify", function() {
var banner = this.options().banner;
this.files.forEach(function( mapping ) {
// Join src
var input = mapping.src.map(function( file ) {
var contents = grunt.file.read( file );
// Strip banners
return contents
// Remove the main jQuery banner, it'll be replaced by the new banner anyway.
.replace( /^\/\*![\W\w]*?\*\/\n?/g, "" )
// Strip other banners preserving line count.
.replace( /^\/\*!(?:.|\n)*?\*\/\n?/gm, function ( match ) {
return match.replace( /[^\n]/gm, "" );
});
}).join("\n");
// Write temp file (with optional banner)
grunt.file.write( mapping.dest, ( banner || "" ) + input );
});
});
// Change the map file to point back to jquery.js instead of jquery.pre-min.js.
// The problem is caused by the pre-uglify task.
// Also, remove temporary files.
grunt.registerMultiTask( "post-uglify", function() {
this.files.forEach(function( mapping ) {
var mapFileName = mapping.src[ 0 ];
// Rename the file to a temporary name.
fs.renameSync( mapFileName, mapping.dest);
grunt.file.write( mapFileName, grunt.file.read( mapping.dest )
// The uglify task erroneously prepends dist/ to file names.
.replace( /"dist\//g, "\"" )
// Refer to the source jquery.js, not the temporary jquery.pre-min.js.
.replace( /\.pre-min\./g, "." )
// There's already a pragma at the beginning of the file, remove the one at the end.
.replace( /\/\/@ sourceMappingURL=jquery\.min\.map$/g, "" ));
});
// Remove temporary files.
this.options().tempFiles.forEach(function( fileName ) {
fs.unlink( fileName );
});
});
};