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    <p>Starting a groovy script with <code>#!/usr/bin/env groovy</code> has a very important limitation - <strong>No additional arguments can be added.</strong> No classpath can be configured, no running groovy with defines or in debug. This is not a <a href="http://jira.codehaus.org/browse/GMOD-226" rel="noreferrer" title="groovy issue">groovy</a> issue, but a limitation in how the shebang (<code>#!</code>) works - all additional arguments are treated as single argument so <code>#!/usr/bin/env groovy -d</code> is telling <code>/usr/bin/env</code> to run the command <code>groovy -d</code> rathen then <code>groovy</code> with an argument of <code>d</code>.</p> <p>There is a workaround for the issue, which involves bootstrapping groovy with bash <strong>in the groovy script.</strong> </p> <pre><code>#!/bin/bash //usr/bin/env groovy -cp extra.jar:spring.jar:etc.jar -d -Dlog4j.configuration=file:/etc/myapp/log4j.xml "$0" $@; exit $? import org.springframework.class.from.jar //other groovy code println 'Hello' </code></pre> <p>All the magic happens in the first two lines. The first line tells us that this is a <code>bash</code> script. <code>bash</code> starts running and sees the first line. In <code>bash</code> <code>#</code> is for comments and <code>//</code> is collapsed to <code>/</code> which is the root directory. So <code>bash</code> will run <code>/usr/bin/env groovy -cp extra.jar:spring.jar:etc.jar -d -Dlog4j.configuration=file:/etc/myapp/log4j.xml "$0" $@</code> which starts groovy with all our desired arguments. The <code>"$0"</code> is the path to our script, and <code>$@</code> are the arguments. Now groovy runs and it ignores the first two lines and sees our groovy script and then exits back to <code>bash</code>. <code>bash</code> then exits (<code>exit $?1</code>) with status code from groovy.</p>
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    1. POHow do I include jars in a groovy script?
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    1. COCan this be done with a Windows batch file?
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    2. CONice tip - although it doesn't appear to work in a Windows Cygwin shell, as the double slash in //usr/bin/env is not collapsed.
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