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    <p>You can read the value of svn:ignore before updating it, then append a new line to this value and set the new value:</p> <pre><code>$ ignores=$(svn propget svn:ignore .) $ ignores="$ignores"$'\n'"*.jar" $ svn propset svn:ignore "$ignores" . </code></pre> <p>You can also use temporary file to store the older value:</p> <pre><code>$ svn propget svn:ignore . &gt; /tmp/ignores $ echo "*.jar" &gt;&gt; /tmp/ignores $ svn propset svn:ignore -F /tmp/ignores . $ rm -f /tmp/ignores </code></pre> <p>But since you're going to execute this code from an Ant script, I'd propose to implement that functionality with <a href="http://svnkit.com/" rel="nofollow noreferrer">SVNKit</a>. The code should look like this:</p> <pre><code>File target = new File(""); SVNWCClient client = SVNClientManager.newInstance().getWCClient(); SVNPropertyData oldValue = client.doGetProperty( target, SVNProperty.IGNORE, SVNRevision.WORKING, SVNRevision.WORKING ); String newValue = SVNPropertyValue.getPropertyAsString(oldValue.getValue()) + '\n' + "*.jars"; client.doSetProperty( target, SVNProperty.IGNORE, SVNPropertyValue.create(newValue), false, SVNDepth.EMPTY, ISVNPropertyHandler.NULL, Collections.emptyList() ); </code></pre> <p>In order to run this code form your ant script, put it into main method of some class IgnoresUpdate. Compile and make .class file available for the script. Then you can invoke it as follows:</p> <pre><code>&lt;java classname="IgnoresUpdate" fork="true"&gt; &lt;classpath&gt; &lt;pathelement location="/path/to/compiled/IgnoresUpdate"/&gt; &lt;pathelement location="/path/to/svnkit.jar"/&gt; &lt;/classpath&gt; &lt;/java&gt; </code></pre> <p>However, as <a href="https://stackoverflow.com/users/1156554/david">David</a> pointed out in <a href="https://stackoverflow.com/a/13648967/1065967">his answer</a>, you can use <a href="http://subclipse.tigris.org/svnant/svntask.html#ignore" rel="nofollow noreferrer">ignore task</a> which seems like the best solution in general (although it may be not applicable for you case).</p>
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    1. POHow to add an entry to svn:ignore without deleting previous value using Subversion commandline
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    1. POHow to add an entry to svn:ignore without deleting previous value using Subversion commandline
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    1. COWow, thank you for your large answer. Why use SVNKit in the Ant script? I mean, I don't know how to use your last code snippet (creating an Ant additional task?), but now that you wrote about it, I think I could do that work in the Ant script itself (getting the propget output and putting it into an Ant property, then adding the missing value and calling a propset).
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    2. COI've updated the answer, so it now has all the possible options. As to your question, one has to put SVNKit on a classpath in order to use it within an Ant script. So, you might want to avoid that and invoke svn commands instead, although that's not very portable.
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    3. COYou're right, Vadishev, it's not very portable but it's not an issue in my case: where I work they have fixed os (windows) and svn client preinstalled, BUT it would be a problem to force installing another java library. Anyway, I'm going with your first suggestion: propget then propset. Thanks for your help all!
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