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<title>CvsTagDiff Task</title>
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<body>
<h2 id="cvstagdiff">CvsTagDiff</h2>
<h3>Description</h3>
<p>Generates an XML-formatted report file of the changes between two tags or dates recorded in
a <a href="https://www.nongnu.org/cvs/" target="_top">CVS</a> repository.</p>
<p><strong>Important</strong>: This task needs <kbd>cvs</kbd> on the path. If it isn't, you will get
an error (such as <code>error=2</code> on Windows). If <code><cvs></code> doesn't work, try to
execute <kbd>cvs.exe</kbd> from the command line in the target directory in which you are working.
Also note that this task assumes that the <kbd>cvs</kbd> executable is compatible with the Unix
version, this is not completely true for certain other CVS clients—like CVSNT for
example—and some operation may fail when using such an incompatible client.</p>
<p>This task captures the output of the CVS command in a file inside of
the <a href="../running.html#tmpdir">temporary directory</a>.</p>
<h3>Parameters</h3>
<table class="attr">
<tr>
<th scope="col">Attribute</th>
<th scope="col">Description</th>
<th scope="col">Required</th>
</tr>
<tr>
<td>startTag</td>
<td>The earliest tag from which diffs are to be included in the report.</td>
<td rowspan="2">Exactly one of the two</td>
</tr>
<tr>
<td>startDate</td>
<td class="left">The earliest date from which diffs are to be included in the
report.<br/>Accepts all formats accepted by the <kbd>cvs</kbd> command for <kbd>-D
date_spec</kbd> arguments.</td>
</tr>
<tr>
<td>endTag</td>
<td>The latest tag from which diffs are to be included in the report.</td>
<td rowspan="2">Exactly one of the two</td>
</tr>
<tr>
<td>endDate</td>
<td class="left">The latest date from which diffs are to be included in the report.<br/>Accepts
all formats accepted by the <kbd>cvs</kbd> command for <kbd>-D date_spec</kbd>
arguments.</td>
</tr>
<tr>
<td>destfile</td>
<td>The file in which to write the diff report.</td>
<td>Yes</td>
</tr>
<tr>
<td>ignoreRemoved</td>
<td>When set to <q>true</q>, the report will not include any removed files. <em>Since Apache
Ant 1.8.0</em></td>
<td>No; defaults to <q>false</q></td>
</table>
<h3>Parameters inherited from the <code>cvs</code> task</h3>
<table class="attr">
<tr>
<th scope="col">Attribute</th>
<th scope="col">Description</th>
<th scope="col">Required</th>
</tr>
<tr>
<td>compression</td>
<td><q>true</q> (equivalent to <q>3</q>), <q>false</q>, or a number between <q>1</q>
and <q>9</q> (corresponding to possible values for CVS <kbd>-z#</kbd> argument). Any other
value is treated as <q>false</q></td>
<td>No; defaults to no compression</td>
</tr>
<tr>
<td>cvsRoot</td>
<td>the <code>CVSROOT</code> variable.</td>
<td>No</td>
</tr>
<tr>
<td>cvsRsh</td>
<td>the <code>CVS_RSH</code> variable.</td>
<td>No</td>
</tr>
<tr>
<td>package</td>
<td>the package/module to analyze.<br/><em>Since Ant 1.6</em> multiple packages separated by
spaces are possible. aliases corresponding to different modules are also possible. Use a
nested <code><module></code> element if you want to specify a module with spaces in its
name.</td>
<td>No</td>
</tr>
<tr>
<td>quiet</td>
<td>suppress informational messages.</td>
<td>No; default <q>false</q></td>
</tr>
<tr>
<td>port</td>
<td>Port used by CVS to communicate with the server.</td>
<td>No; default <q>2401</q></td>
</tr>
<tr>
<td>passfile</td>
<td>Password file to read passwords from.</td>
<td>No; default <q>~/.cvspass</q></td>
</tr>
<tr>
<td>failonerror</td>
<td>Stop the build process if the command exits with a return code other than <q>0</q>.</td>
<td>No; defaults to <q>false</q></td>
</tr>
</table>
<h3>Parameters specified as nested elements</h3>
<h4>module</h4>
<p>Specifies a package/module to work on, unlike the package attribute modules specified using this
attribute can contain spaces in their name.</p>
<table class="attr">
<tr>
<th scope="col">Attribute</th>
<th scope="col">Description</th>
<th scope="col">Required</th>
</tr>
<tr>
<td>name</td>
<td>Name of the module/package.</td>
<td>Yes</td>
</tr>
</table>
<h3>Examples</h3>
<p>Generate a <code>tagdiff</code> report for all the changes that have been made in
the <code>ant</code> module between the tags <samp>ANT_14</samp>
and <samp>ANT_141</samp>. Write these changes into the file <samp>tagdiff.xml</samp>.</p>
<pre>
<cvstagdiff cvsRoot=":pserver:anoncvs@cvs.apache.org:/home/cvspublic"
destfile="tagdiff.xml"
package="ant"
startTag="ANT_14"
endTag="ANT_141"/></pre>
<p>Generate a <code>tagdiff</code> report for all the changes that have been made in
the <samp>ant</samp> module in January 2002. Write the changes into the
file <samp>tagdiff.xml</samp>. In this example, <var>cvsRoot</var> has not been
set. The current <var>cvsRoot</var> will be used (assuming the build is started from a folder stored
in CVS.</p>
<pre>
<cvstagdiff destfile="tagdiff.xml"
package="ant"
startDate="2002-01-01"
endDate="2002-31-01"/></pre>
<p>Generate a <code>tagdiff</code> report for all the changes that have been made in
the <samp>ant</samp> and <samp>jakarta-gump</samp> modules in January 2003. Write the changes into
the file <samp>tagdiff.xml</samp>. In this
example, <var>cvsRoot</var> has not been set. The current <var>cvsRoot</var> will be used (assuming
the build is started from a folder stored in CVS.</p>
<pre>
<cvstagdiff destfile="tagdiff.xml"
package="ant jakarta-gump"
startDate="2003-01-01"
endDate="2003-31-01"/></pre>
<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 an HTML report from the XML report.</p>
<pre>
<style in="tagdiff.xml"
out="tagdiff.html"
style="${ant.home}/etc/tagdiff.xsl">
<param name="title" expression="Ant Diff"/>
<param name="module" expression="ant"/>
<param name="cvsweb" expression="https://cvs.apache.org/viewcvs/"/>
</style></pre>
<h4>Output</h4>
<p>The <var>cvsroot</var> and <var>package</var> attributes of the <code><tagdiff></code> element are
added <em>since Ant 1.6</em>.</p>
<p>Description of <code><entry></code> attributes:</p>
<table>
<tr>
<th scope="col">Attribute</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td><var>name</var></td>
<td>when reporting on one package, the package name is removed from the output</td>
</tr>
<tr>
<td><var>revision</var></td>
<td>supplied for files which exist at the end of the reporting period</td>
</tr>
<tr>
<td><var>prevrevision</var></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>Example:</p>
<pre>
<?xml version="1.0" encoding="UTF-8"?>
<tagdiff startTag="ANT_14" endTag="ANT_141"
cvsroot=":pserver:anoncvs@cvs.apache.org:/home/cvspublic" package="ant">
<entry>
<file>
<name>src/main/org/apache/tools/ant/DirectoryScanner.java</name>
<revision>1.15.2.1</revision>
<prevrevision>1.15</prevrevision>
</file>
</entry>
</tagdiff>
</pre>
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