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Add JavaScript minification using YUICompressor.
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Bryce Curtis
Executable
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YUI is issued by Yahoo! under the BSD License below.
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Copyright (c) 2010, Yahoo! Inc.
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All rights reserved.
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Redistribution and use of this software in source and binary forms, with or
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without modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of Yahoo! Inc. nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission of Yahoo! Inc.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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http://developer.yahoo.com/yui/license.html
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==============================================================================
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YUI Compressor
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==============================================================================
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NAME
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YUI Compressor - The Yahoo! JavaScript and CSS Compressor
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SYNOPSIS
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Usage: java -jar yuicompressor-x.y.z.jar [options] [input file]
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Global Options
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-h, --help Displays this information
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--type <js|css> Specifies the type of the input file
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--charset <charset> Read the input file using <charset>
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--line-break <column> Insert a line break after the specified column number
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-v, --verbose Display informational messages and warnings
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-o <file> Place the output into <file>. Defaults to stdout.
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JavaScript Options
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--nomunge Minify only, do not obfuscate
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--preserve-semi Preserve all semicolons
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--disable-optimizations Disable all micro optimizations
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DESCRIPTION
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The YUI Compressor is a JavaScript compressor which, in addition to removing
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comments and white-spaces, obfuscates local variables using the smallest
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possible variable name. This obfuscation is safe, even when using constructs
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such as 'eval' or 'with' (although the compression is not optimal is those
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cases) Compared to jsmin, the average savings is around 20%.
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The YUI Compressor is also able to safely compress CSS files. The decision
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on which compressor is being used is made on the file extension (js or css)
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GLOBAL OPTIONS
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-h, --help
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Prints help on how to use the YUI Compressor
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--line-break
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Some source control tools don't like files containing lines longer than,
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say 8000 characters. The linebreak option is used in that case to split
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long lines after a specific column. It can also be used to make the code
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more readable, easier to debug (especially with the MS Script Debugger)
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Specify 0 to get a line break after each semi-colon in JavaScript, and
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after each rule in CSS.
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--type js|css
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The type of compressor (JavaScript or CSS) is chosen based on the
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extension of the input file name (.js or .css) This option is required
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if no input file has been specified. Otherwise, this option is only
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required if the input file extension is neither 'js' nor 'css'.
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--charset character-set
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If a supported character set is specified, the YUI Compressor will use it
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to read the input file. Otherwise, it will assume that the platform's
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default character set is being used. The output file is encoded using
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the same character set.
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-o outfile
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Place output in file outfile. If not specified, the YUI Compressor will
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default to the standard output, which you can redirect to a file.
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-v, --verbose
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Display informational messages and warnings.
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JAVASCRIPT ONLY OPTIONS
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--nomunge
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Minify only. Do not obfuscate local symbols.
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--preserve-semi
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Preserve unnecessary semicolons (such as right before a '}') This option
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is useful when compressed code has to be run through JSLint (which is the
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case of YUI for example)
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--disable-optimizations
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Disable all the built-in micro optimizations.
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NOTES
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+ If no input file is specified, it defaults to stdin.
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+ The YUI Compressor requires Java version >= 1.4.
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+ It is possible to prevent a local variable, nested function or function
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argument from being obfuscated by using "hints". A hint is a string that
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is located at the very beginning of a function body like so:
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function fn (arg1, arg2, arg3) {
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"arg2:nomunge, localVar:nomunge, nestedFn:nomunge";
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...
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var localVar;
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...
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function nestedFn () {
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....
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}
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...
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}
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The hint itself disappears from the compressed file.
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+ C-style comments starting with /*! are preserved. This is useful with
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comments containing copyright/license information. For example:
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/*!
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* TERMS OF USE - EASING EQUATIONS
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* Open source under the BSD License.
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* Copyright 2001 Robert Penner All rights reserved.
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*/
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becomes:
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/*
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* TERMS OF USE - EASING EQUATIONS
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* Open source under the BSD License.
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* Copyright 2001 Robert Penner All rights reserved.
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*/
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AUTHOR
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The YUI Compressor was written and is maintained by:
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Julien Lecomte <jlecomte@yahoo-inc.com>
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The CSS portion is a port of Isaac Schlueter's cssmin utility.
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COPYRIGHT
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Copyright (c) 2007-2009, Yahoo! Inc. All rights reserved.
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LICENSE
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All code specific to YUI Compressor is issued under a BSD license.
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YUI Compressor extends and implements code from Mozilla's Rhino project.
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Rhino is issued under the Mozilla Public License (MPL), and MPL applies
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to the Rhino source and binaries that are distributed with YUI Compressor.
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