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<h2><a name="cvstagdiff">CvsTagDiff</a></h2>
<h3>Description</h3>
<p>Generates an XML-formatted report file of the changes between two tags or dates recorded in a
<a href="http://www.nongnu.org/cvs/" target="_top">CVS</a> repository. </p>
<p><b>Important:</b> This task needs "cvs" on the path. If it isn't, you will get
an error (such as error 2 on windows). If <code>&lt;cvs&gt;</code> doesn't work, try to execute <code>cvs.exe</code>
from the command line in the target directory in which you are working.
<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
<tr>
<td valign="top"><b>Attribute</b></td>
<td valign="top"><b>Description</b></td>
<td align="center" valign="top"><b>Required</b></td>
</tr>
<tr>
<td valign="top">startTag</td>
<td valign="top">The earliest tag from which diffs are to be
included in the report.</td>
<td align="center" valign="top" rowspan="2">exactly one of the two.</td>
</tr>
<tr>
<td valign="top">startDate</td>
<td valign="top">The earliest date from which diffs are to be
included in the report.<br>
accepts all formats accepted by the cvs command for -D date_spec arguments</td>
</tr>
<tr>
<td valign="top">endTag</td>
<td valign="top">The latest tag from which diffs are to be
included in the report.</td>
<td align="center" valign="top" rowspan="2">exactly one of the two.</td>
</tr>
<tr>
<td valign="top">endDate</td>
<td valign="top">The latest date from which diffs are to be
included in the report.<br>
accepts all formats accepted by the cvs command for -D date_spec arguments</td>
</tr>
<tr>
<td valign="top">destfile</td>
<td valign="top">The file in which to write the diff report.</td>
<td align="center" valign="top">Yes</td>
</tr>
</table>
<h3>Parameters inherited from the <code>cvs</code> task</h3>
<table border="1" cellpadding="2" cellspacing="0">
<tr>
<td valign="top"><b>Attribute</b></td>
<td valign="top"><b>Description</b></td>
<td align="center" valign="top"><b>Required</b></td>
</tr>
<tr>
<td valign="top">compression</td>
<td valign="top"><code>true</code>, <code>false</code>, or the number 1-9 (corresponding to possible values for CVS <code>-z#</code> argument). Any other value is treated as false</td>
<td align="center" valign="top">No. Defaults to no compression. if passed <code>true</code>, level 3 compression is assumed.</td>
</tr>
<tr>
<td valign="top">cvsRoot</td>
<td valign="top">the CVSROOT variable.</td>
<td align="center" valign="top">No</td>
</tr>
<tr>
<td valign="top">cvsRsh</td>
<td valign="top">the CVS_RSH variable.</td>
<td align="center" valign="top">No</td>
</tr>
<tr>
<td valign="top">package</td>
<td valign="top">the package/module to analyze.<br>
Since ant 1.6
multiple packages separated by spaces are possible.
aliases corresponding to different modules are also possible</td>
<td align="center" valign="top">Yes</td>
</tr>
<tr>
<td valign="top">quiet</td>
<td valign="top">suppress informational messages.</td>
<td align="center" valign="top">No, default &quot;false&quot;</td>
</tr>
<tr>
<td valign="top">port</td>
<td valign="top">Port used by CVS to communicate with the server.</td>
<td align="center" valign="top">No, default port 2401.</td>
</tr>
<tr>
<td valign="top">passfile</td>
<td valign="top">Password file to read passwords from.</td>
<td align="center" valign="top">No, default file <code>~/.cvspass</code>.</td>
</tr>
<tr>
<td valign="top">failonerror</td>
<td valign="top">Stop the buildprocess if the command exits with a
returncode other than 0. Defaults to false</td>
<td align="center" valign="top">No</td>
</tr>
</table>
<h3>Examples</h3>
<pre> &lt;cvstagdiff cvsRoot=&quot;:pserver:anoncvs@cvs.apache.org:/home/cvspublic&quot;
destfile=&quot;tagdiff.xml&quot;
package=&quot;ant&quot;
startTag=&quot;ANT_14&quot;
endTag=&quot;ANT_141&quot;
/&gt;</pre>
<p>Generates a tagdiff report for all the changes that have been made
in the <code>ant</code> module between the tags <code>ANT_14</code> and <code>ANT_141</code>.
It writes these changes into the file <code>tagdiff.xml</code>.</p>
<pre> &lt;cvstagdiff
destfile=&quot;tagdiff.xml&quot;
package=&quot;ant&quot;
startDate=&quot;2002-01-01&quot;
endDate=&quot;2002-31-01&quot;
/&gt;</pre>
<p>Generates a tagdiff report for all the changes that have been made
in the <code>ant</code> module in january 2002. In this example <code>cvsRoot</code>
has not been set. The current <code>cvsRoot</code> will be used (assuming the build is started
from a folder stored in <code>cvs</code>.
It writes these changes into the file <code>tagdiff.xml</code>.</p>
<pre> &lt;cvstagdiff
destfile=&quot;tagdiff.xml&quot;
package=&quot;ant jakarta-gump&quot;
startDate=&quot;2003-01-01&quot;
endDate=&quot;2003-31-01&quot;
/&gt;</pre>
<p>Generates a tagdiff report for all the changes that have been made
in the <code>ant</code> and <code>jakarta-gump</code> modules in january 2003.
In this example <code>cvsRoot</code>
has not been set. The current <code>cvsRoot</code> will be used (assuming the build is started
from a folder stored in <code>cvs</code>.
It writes these changes into the file <code>tagdiff.xml</code>.</p>
<h4>Generate Report</h4>
<p>Ant includes a basic XSLT stylesheet that you can use to generate
a HTML report based on the xml output. The following example illustrates
how to generate a HTML report from the XML report.</p>
<pre>
&lt;style in="tagdiff.xml"
out="tagdiff.html"
style="${ant.home}/etc/tagdiff.xsl"&gt;
&lt;param name="title" expression="Ant Diff"/&gt;
&lt;param name="module" expression="ant"/&gt;
&lt;param name="cvsweb" expression="http://cvs.apache.org/viewcvs/"/&gt;
&lt;/style&gt;
</pre>
<h4>Output</h4>
<p>
The cvsroot and package attributes of the tagdiff element are new in ant 1.6.<br>
Notes on entry attributes :
<table border="1">
<tr><th>Attribute</th><th>Comment</th></tr>
<tr><td>name</td><td>when reporting on one package, the package name is removed from the output</td></tr>
<tr><td>revision</td><td>supplied for files which exist at the end of the reporting period</td></tr>
<tr><td>prevrevision</td><td>supplied for files which exist at the beginning of the reporting period.<br>
Old CVS servers do not supply it for deleted files. CVS 1.12.2 supplies it.</td></tr>
</table>
</p>
<pre>
&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
&lt;tagdiff startTag=&quot;ANT_14&quot; endTag=&quot;ANT_141&quot;
cvsroot=&quot;:pserver:anoncvs@cvs.apache.org:/home/cvspublic&quot; package=&quot;ant&quot;&gt;
&lt;entry&gt;
&lt;file&gt;
&lt;name&gt;src/main/org/apache/tools/ant/DirectoryScanner.java&lt;/name&gt;
&lt;revision&gt;1.15.2.1&lt;/revision&gt;
&lt;prevrevision&gt;1.15&lt;/prevrevision&gt;
&lt;/file&gt;
&lt;/entry&gt;
&lt;/tagdiff&gt;
</pre>
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